DS99R103, DS99R104 www.ti.com SNLS241D - MARCH 2007 - REVISED APRIL 2013 DS99R103/DS99R104 3-40MHz DC-Balanced 24-Bit LVDS Serializer and Deserializer Check for Samples: DS99R103, DS99R104 FEATURES DESCRIPTION * The DS99R103/DS99R104 Chipset translates a 24bit parallel bus into a fully transparent data/control LVDS serial stream with embedded clock information. This single serial stream simplifies transferring a 24bit bus over PCB traces and cable by eliminating the skew problems between parallel data and clock paths. It saves system cost by narrowing data paths that in turn reduce PCB layers, cable width, and connector size and pins. 1 2 * * * * * * * * * * * * * * * * * * 3 MHz-40 MHz Clock Embedded and DCBalancing 24:1 and 1:24 Data Transmissions Capable to Drive Shielded Twisted-Pair Cable User Selectable Clock Edge for Parallel Data on both Transmitter and Receiver Internal DC Balancing Encode/Decode - Supports AC-Coupling Interface with no External Coding Required Individual Power-Down Controls for both Transmitter and Receiver Embedded Clock CDR (Clock and Data Recovery) on Receiver and no External Source of Reference Clock Needed All Codes RDL (Random Data Lock) to Support Live-Pluggable Applications LOCK Output Flag to Ensure Data Integrity at Receiver Side Balanced TSETUP/THOLD Between RCLK and RDATA on Receiver Side PTO (Progressive Turn-On) LVCMOS Outputs to Reduce EMI and Minimize SSO Effects All LVCMOS inputs and control pins have internal pulldown On-Chip Filters for PLLs on Transmitter and Receiver Integrated 100 Input Termination on Receiver 4 mA Receiver Output Drive 48-Pin TQFP and 48-Pin WQFN Packages Pure CMOS .35 m Process Power Supply Range 3.3V 10% Temperature Range -40C to +85C 8 kV HBM ESD Tolerance The DS99R103/DS99R104 incorporates LVDS signaling on the high-speed I/O. LVDS provides a low power and low noise environment for reliably transferring data over a serial transmission path. By optimizing the serializer output edge rate for the operating frequency range EMI is further reduced. In addition the device features pre-emphasis to boost signals over longer distances using lossy cables. Internal DC balanced encoding/decoding is used to support AC-Coupled interconnects. 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright (c) 2007-2013, Texas Instruments Incorporated DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 www.ti.com Block Diagram RRFB RPWDNB Timing and Control DC Balance Decode Output Latch LOCK RCLK bit23 CLK0 bit22 bit21 bit20 bit18 bit17 bit16 bit14 bit15 bit12 bit13 DCB bit11 DCA bit9 bit10 DESERIALIZER DS99R104 bit8 bit7 bit6 bit5 bit4 bit3 bit1 bit2 ROUT Clock Recovery SERIALIZER DS99R103 bit0 24 Timing and Control PLL PLL TPWDNB CLK1 Serial to Parallel RIN- DOUT- RT = 100: (Integrated) RIN+ bit19 TCLK DOUT+ RT = 100: TRFB REN Parallel to Serial 24 DIN DC Balance Encode Input Latch PRE DEN VODSEL These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 2 Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 DS99R103, DS99R104 www.ti.com SNLS241D - MARCH 2007 - REVISED APRIL 2013 Absolute Maximum Ratings (1) (2) -0.3V to +4V Supply Voltage (VDD) LVCMOS/LVTTL Input Voltage -0.3V to (VDD +0.3V) LVCMOS/LVTTL Output Voltage -0.3V to (VDD +0.3V) LVDS Receiver Input Voltage -0.3V to 3.9V LVDS Driver Output Voltage -0.3V to 3.9V LVDS Output Short Circuit Duration 10 ms Junction Temperature +150C Storage Temperature -65C to +150C Lead Temperature (Soldering, 4 seconds) +260C Maximum Package Power Dissipation Capacity Package De-rating: 48L TQFP 1/JA C/W above +25C DS99R103 JA 45.8 (3); 75.4 (4) C/W JC 21.0C/W DS99R104 45.4 (3); 75.0 (4)C/W JA JC 21.1C/W 48L WQFN 1/JA C/W above +25C DS99R103 JA 28 (3) 79.1 (4) C/W JC 3.7C/W DS99R104 JA 28 (3); 79.1 (4)C/W JC 3.71C/W 8 kV ESD Rating (HBM) (1) (2) (3) (4) "Absolute Maximum Ratings" indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the device should not be operated beyond such conditions. If Military/Aerospace specified devices are required, please contact the Texas Instruments Sales Office/ Distributors for availability and specifications. 4L JEDEC 2L JEDEC Recommended Operating Conditions Min Nom Max Units Supply Voltage (VDD) 3.0 3.3 3.6 V Operating Free Air Temperature (TA) -40 +25 +85 C 40 MHz 100 mVP-P Clock Rate 3 Supply Noise Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 Submit Documentation Feedback 3 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 www.ti.com Electrical Characteristics (1) (2) (3) Over recommended operating supply and temperature ranges unless otherwise specified. Parameter Test Conditions Pin/Freq. Min Typ Max Units 2.0 1.5 VDD V GND 1.5 0.8 V -0.8 -1.5 V LVCMOS/LVTTL DC SPECIFICATIONS VIH High Level Voltage VIL Low Level Input Voltage VCL Input Clamp Voltage IIN Input Current ICL = -18 mA (4) VIN = 0V or 3.6V VOH High Level Output Voltage IOH = -4 mA VOL Low Level Output Voltage IOL = +4 mA Tx: DIN[23:0], TCLK, TPWDNB, DEN, TRFB, DCAOFF, DCBOFF, VODSEL Rx: RPWDNB, RRFB, REN Tx: DIN[23:0], TCLK, TPWDNB, DEN, TRFB, DCAOFF, DCBOFF, VODSEL -10 1 +10 A Rx: RPWDNB, RRFB, REN -20 5 +20 A Rx: ROUT[23:0], RCLK, LOCK (4) IOS Output Short Circuit Current VOUT = 0V IOZ TRI-STATE Output Current RPWDNB, REN = 0V VOUT = 0V or 2.4V Rx: ROUT[23:0], RCLK, LOCK VCM = +1.2V Rx: RIN+, RIN- 2.3 3.0 VDD V GND 0.33 0.5 V -40 -70 -110 mA -30 0.4 +30 A +50 mV LVDS DC SPECIFICATIONS VTH Differential Threshold High Voltage VTL Differential Threshold Low Voltage IIN Input Current RT Differential Internal Termination Resistance VOD Output Differential Voltage (DOUT+)-(DOUT-) -50 mV VIN = +2.4V, VDD = 3.6V 300 A VIN = 0V, VDD = 3.6V 300 A RL = 100, w/o Pre-emphasis VODSEL = L (Figure 10) Tx: DOUT+, DOUT- RL = 100, w/o Pre-emphasis VODSEL = H (Figure 10) 90 100 130 250 400 600 mV 450 750 1200 mV 4 50 mV 1.25 1.50 V 1 50 mV VOD Output Differential Voltage Unbalance RL = 100, w/o Pre-emphasis VOS Offset Voltage RL = 100, w/o Pre-emphasis VOS Offset Voltage Unbalance RL = 100, w/o Pre-emphasis IOS Output Short Circuit Current DOUT = 0V, DIN = H, TPWDNB, DEN = 2.4V, VODSEL = L -2 -5 -8 mA DOUT = 0V, DIN = H, TPWDNB, DEN = 2.4V, VODSEL = H -7 -10 -13 mA TPWDNB, DEN = 0V, DOUT = 0V or 2.4V -15 1 +15 A IOZ (1) (2) (3) (4) 4 TRI-STATE Output Current 1.00 The Electrical Characteristics tables list ensured specifications under the listed Recommended Operating Conditions except as otherwise modified or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not ensured. Typical values represent most likely parametric norms at VDD = 3.3V, TA = +25 degC, and at the Recommended Operation Conditions at the time of product characterization and are not ensured. Current into device pins is defined as positive. Current out of a device pin is defined as negative. Voltages are referenced to ground except VOD, VOD, VTH and VTL which are differential voltages. Specification is ensured by characterization and is not tested in production. Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 DS99R103, DS99R104 www.ti.com SNLS241D - MARCH 2007 - REVISED APRIL 2013 Electrical Characteristics(1)(2)(3) (continued) Over recommended operating supply and temperature ranges unless otherwise specified. Parameter Test Conditions Pin/Freq. Min Typ Max Units 40 80 mA 45 85 mA 40 85 mA 45 90 mA 14 250 A 95 mA 90 mA 50 A SER/DES SUPPLY CURRENT (DVDD*, PVDD* and AVDD* pins) *Digital, PLL, and Analog VDDs IDDT Serializer (Tx) Total Supply Current (includes load current) Serializer (Tx) Total Supply Current (includes load current) RL = 100 Pre-emphasis = OFF VODSEL = L Checker-board pattern (Figure 1) f = 40 MHz RL = 100 RPRE = 6 k VODSEL = L Checker-board pattern (Figure 1) f = 40 MHz RL = 100 Pre-emphasis = OFF VODSEL = H Checker-board pattern (Figure 1) f = 40 MHz RL = 100 RPRE = 6 k VODSEL = H Checker-board pattern (Figure 1) f = 40 MHz IDDTZ Serializer (Tx) Supply Current Power-down TPWDNB = 0V (All other LVCMOS Inputs = 0V) IDDR Deserializer (Rx) Total Supply Current (includes load current) CL = 8 pF LVCMOS Output Checker-board pattern (Figure 2) f = 40 MHz Deserializer (Rx) Total Supply Current (includes load current) CL = 8 pF LVCMOS Output Random pattern f = 40 MHz Deserializer (Rx) Supply Current Power-down RPWDNB = 0V (All other LVCMOS Inputs = 0V, RIN+/ RIN-= 0V) IDDRZ 1 Serializer Timing Requirements for TCLK (1) (2) Over recommended operating supply and temperature ranges unless otherwise specified. Parameter Test Conditions Min Max Units tTCP Transmit Clock Period 25 T 333 ns tTCIH Transmit Clock High Time 0.4T 0.5T 0.6T ns tTCIL Transmit Clock Low Time 0.4T 0.5T 0.6T ns tCLKT TCLK Input Transition Time 3 6 ns 33 ps (RMS) tJIT (1) (2) (3) TCLK Input Jitter (Figure 5) Typ (Figure 4) See (3) Figure 1, Figure 2, Figure 8, Figure 12, and Figure 14, show a falling edge data strobe (TCLK IN/RCLK OUT). Figure 5 and Figure 15 show a rising edge data strobe (TCLK IN/RCLK OUT). tJIT (@BER of 10e-9) specifies the allowable jitter on TCLK. tJIT not included in TxOUT_E_O parameter. Serializer Switching Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Parameter Test Conditions tLLHT LVDS Low-to-High Transition Time tLHLT LVDS High-to-Low Transition Time tDIS DIN (23:0) Setup to TCLK tDIH DIN (23:0) Hold from TCLK (1) Min RL = 100, (Figure 3) CL = 10 pF to GND VODSEL = L RL = 100, CL = 10 pF to GND (1) Typ Max Units 0.6 ns 0.6 ns 5 ns 5 ns Specification is ensured by characterization and is not tested in production. Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 Submit Documentation Feedback 5 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 www.ti.com Serializer Switching Characteristics (continued) Over recommended operating supply and temperature ranges unless otherwise specified. Parameter tHZD Test Conditions Min Typ Max Units 15 ns 15 ns tZHD DOUT HIGH to TRI-STATE Delay RL = 100, CL = 10 pF to GND DOUT LOW to TRI-STATE Delay (Figure 6) (2) DOUT TRI-STATE to HIGH Delay 200 ns tZLD DOUT TRI-STATE to LOW Delay 200 ns tPLD Serializer PLL Lock Time RL = 100, (Figure 7) tSD Serializer Delay RL = 100, (Figure 8) VODSEL = L, TRFB = H 3.5T + 2.85 3.5T + 10 ns RL = 100, (Figure 8) VODSEL = L, TRFB = L 3.5T + 2.85 3.5T + 10 ns tLZD TxOUT_E_O (2) (3) (4) (5) TxOUT_Eye_Opening (respect to ideal) 10 3-40 MHz (Figure 9) (3) (4) ms UI 0.68 (5) When the Serializer output is at TRI-STATE, the Deserializer will lose PLL lock. Resynchronization MUST occur before data transfer. tJIT (@BER of 10e-9) specifies the allowable jitter on TCLK. tJIT not included in TxOUT_E_O parameter. TxOUT_E_O is affected by pre-emphasis value. UI - Unit Interval, equivalent to one ideal serialized data bit width. The UI scales with frequency. Deserializer Switching Characteristics Over recommended operating supply and temperature ranges unless otherwise specified. Parameter Test Conditions tRCP = tTCP (1) tRCP Receiver out Clock Period tRDC RCLK Duty Cycle tCLH LVCMOS Low-to-High Transition Time tCHL LVCMOS High-to-Low Transition Time tROS ROUT (7:0) Setup Data to RCLK (Group 1) tROH ROUT (7:0) Hold Data to RCLK (Group 1) tROS ROUT (15:8) Setup Data to RCLK (Group 2) tROH ROUT (15:8) Hold Data to RCLK (Group 2) tROS ROUT (23:16) Setup Data to RCLK (Group 3) tROH ROUT (23:16) Hold Data to RCLK (Group 3) tHZR HIGH to TRI-STATE Delay tLZR LOW to TRI-STATE Delay tZHR tZLR tDD Deserializer Delay (Figure 12) tDRDL Deserializer PLL Lock Time from Powerdown (Figure 14) (2) (1) Receiver INput TOLerance Left RxIN_TOL_L (4) 6 Pin/Freq. Typ Max Units 25 T 333 ns RCLK 45 CL = 8 pF (lumped load) (Figure 11) ROUT [23:0], LOCK, RCLK (Figure 15) ROUT [7:0] (Figure 15) (Figure 15) (Figure 13) ROUT [15:8], LOCK ROUT [23:16] ROUT [23:0], RCLK, LOCK 50 55 % 2.5 3.5 ns 2.5 3.5 ns (0.40)* tRCP (29/56)*tRCP ns (0.40)* tRCP (27/56)*tRCP ns (0.40)* tRCP 0.5*tRCP ns (0.40)* tRCP 0.5*tRCP ns (0.40)* tRCP (27/56)*tRCP ns (0.40)* tRCP (29/56)*tRCP ns 3 10 ns 3 10 ns TRI-STATE to HIGH Delay 3 10 ns TRI-STATE to LOW Delay 3 10 ns RCLK [4+(3/56)]T +5.9 [4+(3/56)]T +18.5 ns 3 MHz 5 50 ms 40 MHz 5 50 ms (Figure 16) (3) (1) (4) 3 MHz-40 MHz 0.25 UI (Figure 16) (3) (1) (4) 3 MHz-40 MHz 0.25 UI RxIN_TOL_R Receiver INput TOLerance Right (1) (2) (3) Min RCLK Specification is ensured by characterization and is not tested in production. The Deserializer PLL lock time (tDRDL) may vary depending on input data patterns and the number of transitions within the pattern. RxIN_TOL is a measure of how much phase noise (jitter) the deserializer can tolerate in the incoming data stream before bit errors occur. It is a measurement in reference with the ideal bit position, please see TI's AN-1217 (Literature Number SNLA053) for detail. UI - Unit Interval, equivalent to one ideal serialized data bit width. The UI scales with frequency. Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 DS99R103, DS99R104 www.ti.com SNLS241D - MARCH 2007 - REVISED APRIL 2013 AC Timing Diagrams and Test Circuits Device Pin Name Signal Pattern TCLK ODD DIN EVEN DIN Figure 1. Serializer Input Checker-board Pattern Device Pin Name Signal Pattern RCLK ODD ROUT EVEN ROUT Figure 2. Deserializer Output Checker-board Pattern DOUT+ 10 pF Differential Signal 100: 80% 80% 20% Vdiff = 0V 20% DOUT10 pF tLLHT tLHLT Vdiff = (DOUT+) - (DOUT-) Figure 3. Serializer LVDS Output Load and Transition Times VDD 80% 80% TCLK 20% 20% 0V tCLKT tCLK Figure 4. Serializer Input Clock Transition Times tTCP TCLK VDD/2 tDIS VDD/2 VDD/2 tDIH VDD DIN [0:23] VDD/2 Setup Hold VDD/2 0V Figure 5. Serializer Setup/Hold Times Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 Submit Documentation Feedback 7 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 www.ti.com Parasitic package and Trace capcitance DOUT+ 5 pF 100: DOUTDEN tLZD DEN VCC/2 (single-ended) 0V VCC/2 0V CLK1 CLK1 tTCP tTCP DOUT (differential) 200 mV DCA tZLD 200 mV DCA DCA DCA $OO GDWD 0V DCA DCA DCA DCA tHZD DEN VCC/2 (single-ended) 0V VCC/2 0V $OO GDWD 1V tZHD DCA 200 mV DCA DCA DCA DCA DCA DCA DCA 200 mV DOUT (differential) tTCP tTCP CLK0 CLK0 Figure 6. Serializer TRI-STATE Test Circuit and Delay PWDWN 2.0V 0.8V tHZD or tLZD TCLK tPLD DOUT TRI-STATE tZHD or tZLD Output Active TRI-STATE Figure 7. Serializer PLL Lock Time, and TPWDNB TRI-STATE Delays 8 Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 DIN SYMBOL N SYMBOL N+1 SYMBOL N+2 | | www.ti.com SYMBOL N+3 | tSD TCLK 23 0 1 2 23 0 1 2 23 0 1 2 STOP START BIT BIT 23 0 STOP BIT SYMBOL N 1 2 | | 2 STOP START BIT BIT SYMBOL N-1 | | 1 | | 0 | | DOUT0-23 DCA, DCB STOP START BIT BIT SYMBOL N-2 | | STOP START BIT BIT SYMBOL N-3 SYMBOL N-4 23 Figure 8. Serializer Delay Ideal Data Bit End Ideal Data Bit Beginning TxOUT_E_O tBIT(1/2UI) tBIT(1/2UI) Ideal Center Position (tBIT/2) tBIT (1UI) 24 DIN PARALLEL-TO-SERIAL Figure 9. Transmitter Output Eye Opening (TxOUT_E_O) DOUT+ RL DOUT- TCLK VOD = (DOUT+) - (DOUT -) Differential output signal is shown as (DOUT+) - (DOUT -), device in Data Transfer mode. Figure 10. Serializer VOD Diagram Single-ended Signal Deserializer 8 pF lumped 80% 80% 20% 20% tCLH tCHL Figure 11. Deserializer LVCMOS/LVTTL Output Load and Transition Times Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 Submit Documentation Feedback 9 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 23 0 1 2 23 0 1 2 23 0 1 2 STOP BIT | | 2 STOP START BIT BIT SYMBOL N+3 | | 1 STOP START BIT BIT SYMBOL N+2 | | 0 STOP START BIT BIT SYMBOL N+1 SYMBOL N | | START BIT RIN0-23 DCA, DCB www.ti.com 23 tDD RCLK SYMBOL N-3 ROUT0-23 SYMBOL N-2 SYMBOL N-1 SYMBOL N Figure 12. Deserializer Delay 500: VREF CL = 8pF VREF = VDD/2 for tZLR or tLZR, + - VREF = 0V for tZHR or tHZR REN VOH VDD/2 REN VDD/2 VOL tLZR tZLR VOL + 0.5V VOL + 0.5V VOL ROUT [23:0] tHZR tZHR VOH VOH - 0.5V VOH + 0.5V Note: CL includes instrumentation and fixture capacitance within 6 cm of ROUT[23:0] Figure 13. Deserializer TRI-STATE Test Circuit and Timing 2.0V PWDN 0.8V | | tDRDL RIN LOCK }v[ TRI-STATE OE TRI-STATE tHZR or tLZR ROUT [0:23] TRI-STATE TRI-STATE RCLK TRI-STATE TRI-STATE REN Figure 14. Deserializer PLL Lock Times and RPWDNB TRI-STATE Delay 10 Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 DS99R103, DS99R104 www.ti.com SNLS241D - MARCH 2007 - REVISED APRIL 2013 tLOW RCLK tHIGH VDD/2 ROUT [7:0] VDD/2 VDD/2 tROS tROH (group 1) (group 1) Data Valid Before RCLK Data Valid After RCLK VDD/2 1/2 UI ROUT [15:8], LOCK 1/2 UI VDD/2 tROS tROH (group 2) (group 2) Data Valid Before RCLK Data Valid After RCLK VDD/2 1/2 UI ROUT [23:16] 1/2 UI VDD/2 tROS tROH (group 3) (group 3) Data Valid Before RCLK Data Valid After RCLK VDD/2 Figure 15. Deserializer Setup and Hold Times Ideal Data Bit Beginning Sampling Window RxIN_TOL -L Ideal Data Bit End RxIN_TOL -R Ideal Sampling Position tBIT ( ) 2 tBIT (1UI) RxIN_TOL_L is the ideal noise margin on the left of the figure, with respect to ideal. RxIN_TOL_R is the ideal noise margin on the right of the figure, with respect to ideal. Figure 16. Receiver Input Tolerance (RxIN_TOL) and Sampling Window Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 Submit Documentation Feedback 11 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 www.ti.com DS99R103 Pin Diagram DIN[3] DIN[2] DIN[1] DIN[0] 28 27 26 25 VDDT DIN[4] 30 29 DIN[5] VSST 32 31 DIN[7] DIN[6] 34 33 DIN[9] DIN[8] 36 35 Top View DIN[10] 37 24 VSS DIN[11] 38 23 PRE DIN[12] 39 22 VDDDR DIN[13] 40 21 VSSDR DIN[14] 41 20 DOUT+ VDDIT 42 19 DOUT- VSSIT 43 DIN[15] DS99R103 48 PIN WQFN 48 PIN TQFP 12 11 TRFB VODSEL 10 9 TCLK TPWDNB RESRVD 8 13 7 48 VDDL DIN[19] DCBOFF VDDPT1 6 14 5 47 VSSL DIN[18] DCAOFF VSSPT1 4 VDDPT0 15 3 16 46 DIN[23] 45 DIN[17] DIN[22] DIN[16] 2 VSSPT0 1 17 DIN[21] DEN 44 DIN[20] 18 Figure 17. Serializer - DS99R103 See Package Numbers NJU0048D (WQFN) and PFB0048A (TQFP) DS99R103 Serializer Pin Descriptions Pin No. Pin Name I/O Description LVCMOS PARALLEL INTERFACE PINS 4-1, DIN[23:0] 48-44, 41-32, 29-25 LVCMOS_I Transmitter Parallel Interface Data Inputs Pins. Tie LOW if unused, do not float. 10 LVCMOS_I Transmitter Parallel Interface Clock Input Pin. Strobe edge set by TRFB configuration pin TCLK CONTROL AND CONFIGURATION PINS 9 TPWDNB LVCMOS_I Transmitter Power Down Bar TPWDNB = H; Transmitter is Enabled and ON TPWDNB = L; Transmitter is in power down mode (Sleep), LVDS Driver DOUT (+/-) Outputs are in TRI-STATE stand-by mode, PLL is shutdown to minimize power consumption. 18 DEN LVCMOS_I Transmitter Data Enable DEN = H; LVDS Driver Outputs are Enabled (ON). DEN = L; LVDS Driver Outputs are Disabled (OFF), Transmitter LVDS Driver DOUT (+/-) Outputs are in TRI-STATE, PLL still operational and locked to TCLK. 23 PRE LVCMOS_I PRE-emphasis select pin. PRE = (RPRE 3 k); Imax = [(1.2/R)*20], Rmin = 3 k PRE = No Connect (NC); pre-emphasis is disabled 11 TRFB LVCMOS_I Transmitter Clock Edge Select Pin TRFB = H; Parallel Interface Data is strobed on the Rising Clock Edge. TRFB = L; Parallel Interface Data is strobed on the Falling Clock Edge 12 Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 DS99R103, DS99R104 www.ti.com SNLS241D - MARCH 2007 - REVISED APRIL 2013 DS99R103 Serializer Pin Descriptions (continued) Pin No. Pin Name I/O Description 12 VODSEL LVCMOS_I VOD Level Select VODSEL = L; LVDS Driver Output is 400 mV (RL = 100) VODSEL = H; LVDS Driver Output is 750 mV (RL = 100) For normal applications, set this pin LOW. For long cable applications where a larger VOD is required, set this pin HIGH. 5 DCAOFF LVCMOS_I RESERVED - This pin MUST be tied LOW. 8 DCBOFF LVCMOS_I RESERVED - This pin MUST be tied LOW. 13 RESRVD LVCMOS_I RESERVED - This pin MUST be tied LOW. LVDS SERIAL INTERFACE PINS 20 DOUT+ LVDS_O Transmitter LVDS True (+) Output. This output is intended to be loaded with a 100 load to the DOUT+ pin. The interconnect should be AC Coupled to this pin with a 100 nF capacitor. 19 DOUT- LVDS_O Transmitter LVDS Inverted (-) Output This output is intended to be loaded with a 100 load to the DOUT- pin. The interconnect should be AC Coupled to this pin with a 100 nF capacitor. POWER / GROUND PINS 22 VDDDR VDD Analog Voltage Supply, LVDS Output Power 21 VSSDR GND Analog Ground, LVDS Output Ground 16 VDDPT0 VDD Analog Voltage supply, VCO Power 17 VSSPT0 GND Analog Ground, VCO Ground 14 VDDPT1 VDD Analog Voltage supply, PLL Power 15 VSSPT1 GND Analog Ground, PLL Ground 30 VDDT VDD Digital Voltage supply, Tx Serializer Power 31 VSST GND Digital Ground, Tx Serializer Ground 7 VDDL VDD Digital Voltage supply, Tx Logic Power 6 VSSL GND Digital Ground, Tx Logic Ground 42 VDDIT VDD Digital Voltage supply, Tx Input Power 43 VSSIT GND Digital Ground, Tx Input Ground 24 VSS GND ESD Ground Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 Submit Documentation Feedback 13 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 www.ti.com DS99R104 Pin Diagram ROUT[5] ROUT[6] ROUT[7] 27 26 25 VSSOR1 ROUT[4] 28 VDDOR1 29 ROUT[3] 31 ROUT[1] ROUT[2] 33 32 30 VSSR0 ROUT[0] 34 VDDR0 36 35 Top View PTO GROUP 1 37 24 ROUT[8] VSSR1 38 23 ROUT[9] VDDIR 39 22 ROUT[10] VSSIR 40 21 ROUT[11] RIN+ 41 RIN- 42 PTO GROUP 2 VDDR1 DS99R104 48 PIN WQFN 48 PIN TQFP 20 VDDOR2 19 VSSOR2 18 RCLK 17 LOCK RRFB 43 VSSPR1 44 VDDPR1 45 16 ROUT[12] VSSPR0 46 15 ROUT[13] VDDPR0 47 14 ROUT[14] REN 48 13 ROUT[15] 3 4 5 6 7 8 9 10 11 ROUT[23] ROUT[22] ROUT[21] ROUT[20] VDDOR3 VSSOR3 ROUT[19] ROUT[18] ROUT[17] 12 2 RESRVD ROUT[16] 1 RPWDNB PTO GROUP 3 Figure 18. Deserializer - DS99R104 See Package Numbers NJU0048D (WQFN) and PFB0048A (TQFP) DS99R104 Deserializer Pin Descriptions Pin No. Pin Name I/O Description LVCMOS PARALLEL INTERFACE PINS 25-28, ROUT[7:0] 31-34 LVCMOS_O Receiver Parallel Interface Data Outputs - Group 1 13-16, ROUT[15:8] 21-24 LVCMOS_O Receiver Parallel Interface Data Outputs - Group 2 3-6, 9- ROUT[23:16] 12 LVCMOS_O Receiver Parallel Interface Data Outputs - Group 3 18 LVCMOS_O Parallel Interface Clock Output Pin. Strobe edge set by RRFB configuration pin. RCLK CONTROL AND CONFIGURATION PINS 43 RRFB LVCMOS_I Receiver Clock Edge Select Pin RRFB = H; ROUT LVCMOS Outputs strobed on the Rising Clock Edge. RRFB = L; ROUT LVCMOS Outputs strobed on the Falling Clock Edge. 48 REN LVCMOS_I Receiver Data Enable REN = H; ROUT[23-0] and RCLK are Enabled (ON). REN = L; ROUT[23-0] and RCLK are Disabled (OFF), Receiver ROUT[23-0] and RCLK Outputs are in TRI-STATE, PLL still operational and locked to TCLK. 1 RPWDNB LVCMOS_I Receiver Data Enable REN = H; ROUT[23-0] and RCLK are Enabled (ON). REN = L; ROUT[23-0] and RCLK are Disabled (OFF), Receiver ROUT[23-0] and RCLK Outputs are in TRI-STATE, PLL still operational and locked to TCLK. 14 Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 DS99R103, DS99R104 www.ti.com SNLS241D - MARCH 2007 - REVISED APRIL 2013 DS99R104 Deserializer Pin Descriptions (continued) Pin No. Pin Name I/O Description 17 LOCK LVCMOS_O LOCK indicates the status of the receiver PLL LOCK = H; receiver PLL is locked LOCK = L; receiver PLL is unlocked, ROUT[23-0] and RCLK are TRI-STATED 2 RESRVD LVCMOS_I RESERVED - This pin MUST be tied LOW. LVDS SERIAL INTERFACE PINS 41 RIN+ LVDS_I Receiver LVDS True (+) Input This input is intended to be terminated with a 100 load to the RIN+ pin. The interconnect should be AC Coupled to this pin with a 100 nF capacitor. 42 RIN- LVDS_I Receiver LVDS Inverted (-) Input This input is intended to be terminated with a 100 load to the RIN- pin. The interconnect should be AC Coupled to this pin with a 100 nF capacitor. POWER / GROUND PINS 39 VDDIR VDD Analog LVDS Voltage supply, Power 40 VSSIR GND Analog LVDS Ground 47 VDDPR0 VDD Analog Voltage supply, PLL Power 46 VSSPR0 GND Analog Ground, PLL Ground 45 VDDPR1 VDD Analog Voltage supply, PLL VCO Power 44 VSSPR1 GND Analog Ground, PLL VCO Ground 37 VDDR1 VDD Digital Voltage supply, Logic Power 38 VSSR1 GND Digital Ground, Logic Ground 36 VDDR0 VDD Digital Voltage supply, Logic Power 35 VSSR0 GND Digital Ground, Logic Ground 30 VDDOR1 VDD Digital Voltage supply, LVCMOS Output Power 29 VSSOR1 GND Digital Ground, LVCMOS Output Ground 20 VDDOR2 VDD Digital Voltage supply, LVCMOS Output Power 19 VSSOR2 GND Digital Ground, LVCMOS Output Ground 7 VDDOR3 VDD Digital Voltage supply, LVCMOS Output Power 8 VSSOR3 GND Digital Ground, LVCMOS Output Ground FUNCTIONAL DESCRIPTION The DS99R103 Serializer and DS99R104 Deserializer chipset is an easy-to-use transmitter and receiver pair that sends 24-bits of parallel LVCMOS data over a single serial LVDS link from 72 Mbps to 960 Mbps throughput. The DS99R103 transforms a 24-bit wide parallel LVCMOS data into a single high speed LVDS serial data stream with embedded clock. The DS99R104 receives the LVDS serial data stream and converts it back into a 24-bit wide parallel data and recovered clock. The 24-bit Serializer/Deserializer chipset is designed to transmit data over shielded twisted pair (STP) at clock speeds from 3 MHz to 40 MHz. The Deserializer can attain lock to a data stream without the use of a separate reference clock source. The Deserializer synchronizes to the Serializer regardless of data pattern, delivering true automatic "plug and lock" performance. The Deserializer recovers the clock and data by extracting the embedded clock information and validating data integrity from the incoming data stream and then deserializes the data. The Deserializer monitors the incoming clock information, determines lock status, and asserts the LOCK output high when lock occurs. Each has a power down control to enable efficient operation in various applications. INITIALIZATION AND LOCKING MECHANISM Initialization of the DS99R103 and DS99R104 must be established before each device sends or receives data. Initialization refers to synchronizing the Serializer's and Deserializer's PLL's together. After the Serializers locks to the input clock source, the Deserializer synchronizes to the Serializers as the second and final initialization step. 1. When VDD is applied to both Serializer and/or Deserializer, the respective outputs are held in TRI-STATE and internal circuitry is disabled by on-chip power-on circuitry. When VDD reaches VDD OK (2.2V) the PLL in Serializer begins locking to a clock input. For the Serializer, the local clock is the transmit clock, TCLK. The Serializer outputs are held in TRI-STATE while the PLL locks to the TCLK. After locking to TCLK, the Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 Submit Documentation Feedback 15 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 www.ti.com Serializer block is now ready to send data patterns. The Deserializer output will remain in TRI-STATE while its PLL locks to the embedded clock information in serial data stream. Also, the Deserializer LOCK output will remain low until its PLL locks to incoming data and sync-pattern on the RIN pins. 2. The Deserializer PLL acquires lock to a data stream without requiring the Serializer to send special patterns. The Serializer that is generating the stream to the Deserializer will automatically send random (nonrepetitive) data patterns during this step of the Initialization State. The Deserializer will lock onto embedded clock within the specified amount of time. An embedded clock and data recovery (CDR) circuit locks to the incoming bit stream to recover the high-speed receive bit clock and re-time incoming data. The CDR circuit expects a coded input bit stream. In order for the Deserializer to lock to a random data stream from the Serializer, it performs a series of operations to identify the rising clock edge and validates data integrity, then locks to it. Because this locking procedure is independent on the data pattern, total random locking duration may vary. At the point when the Deserializer's CDR locks to the embedded clock, the LOCK pin goes high and valid RCLK/data appears on the outputs. Note that the LOCK signal is synchronous to valid data appearing on the outputs. The Deserializer's LOCK pin is a convenient way to ensure data integrity is achieved on receiver side. DATA TRANSFER After lock is established, the Serializer inputs DIN0-DIN23 are used to input data to the Serializer. Data is clocked into the Serializer by the TCLK input. The edge of TCLK used to strobe the data is selectable via the TRFB pin. TRFB high selects the rising edge for clocking data and low selects the falling edge. The Serializer outputs (DOUT) are intended to drive point-to-point connections or limited multi-point applications. CLK1, CLK0, DCA, DCB are four overhead bits transmitted along the single LVDS serial data stream. The CLK1 bit is always high and the CLK0 bit is always low. The CLK1 and CLK0 bits function as the embedded clock bits in the serial stream. DCB functions as the DC Balance control bit. It does not require any pre-coding of data on transmit side. The DC Balance bit is used to minimize the short and long-term DC bias on the signal lines. This bit operates by selectively sending the data either unmodified or inverted. The DCA bit is used to validate data integrity in the embedded data stream. Both DCA and DCB coding schemes are integrated and automatically performed within Serializer and Deserializer. The chipset supports clock frequency ranges of 3 MHz to 40 MHz. Every clock cycle, 24 databits are sent along with 4 additional overhead control bits. Thus the line rate is 1.12 Gbps maximum (84 Mbps minimum). The link is extremely efficient at 86% (24/28). Twenty five (24 data + 1 clock) plus associated ground signals are reduced to only 1 single LVDS pair providing a compression ratio of better then 25 to 1. Serialized data and clock/control bits (24+4 bits) are transmitted from the serial data output (DOUT) at 28 times the TCLK frequency. For example, if TCLK is , the serial rate is 40 x 28 = 1.12 Giga bits per second. Since only 24 bits are from input data, the serial "payload" rate is 24 times the TCLK frequency. For instance, if TCLK = 40 MHz, the payload data rate is 40 x 24 = 960 Mbps. TCLK is provided by the data source and must be in the range of 3 MHz to 40 MHz nominal. The Serializer outputs (DOUT) can drive a point-to-point connection as shown in Figure 19. The outputs transmit data when the enable pin (DEN) is high and TPWDNB is high. The DEN pin may be used to TRI-STATE the outputs when driven low. When the Deserializer channel attains lock to the input from a Serializer, it drives its LOCK pin high and synchronously delivers valid data and recovered clock on the output. The Deserializer locks onto the embedded clock, uses it to generate multiple internal data strobes, and then drives the recovered clock to the RCLK pin. The recovered clock (RCLK output pin) is synchronous to the data on the ROUT[23:0] pins. While LOCK is high, data on ROUT[23:0] is valid. Otherwise, ROUT[23:0] is invalid. The polarity of the RCLK edge is controlled by the RRFB input. ROUT(0-23), LOCK and RCLK outputs will each drive a maximum of 8 pF load with a 40 MHz clock. REN controls TRI-STATE for ROUTn and the RCLK pin on the Deserializer. RESYNCHRONIZATION If the Deserializer loses lock, it will automatically try to re-establish lock. For example, if the embedded clock edge is not detected one time in succession, the PLL loses lock and the LOCK pin is driven low. The Deserializer then enters the operating mode where it tries to lock to a random data stream. It looks for the embedded clock edge, identifies it and then proceeds through the locking process. The logic state of the LOCK signal indicates whether the data on ROUT is valid; when it is high, the data is valid. The system must monitor the LOCK pin to determine whether data on the ROUT is valid. 16 Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 DS99R103, DS99R104 www.ti.com SNLS241D - MARCH 2007 - REVISED APRIL 2013 POWERDOWN The Powerdown state is a low power sleep mode that the Serializer and Deserializer may use to reduce power when no data is being transferred. The TPWDNB and RPWDNB are used to set each device into power down mode, which reduces supply current to the A range. The Serializer enters powerdown when the TPWDNB pin is driven low. In powerdown, the PLL stops and the outputs go into TRI-STATE, disabling load current and reducing supply. To exit Powerdown, TPWDNB must be driven high. When the Serializer exits Powerdown, its PLL must lock to TCLK before it is ready for the Initialization state. The system must then allow time for Initialization before data transfer can begin. The Deserializer enters powerdown mode when RPWDNB is driven low. In powerdown mode, the PLL stops and the outputs enter TRI-STATE. To bring the Deserializer block out of the powerdown state, the system drives RPWDNB high. Both the Serializer and Deserializer must reinitialize and relock before data can be transferred. The Deserializer will initialize and assert LOCK high when it is locked to the encoded clock. TRI-STATE For the Serializer, TRI-STATE is entered when the DEN or TPWDNB pin is driven low. This will TRI-STATE both driver output pins (DOUT+ and DOUT-). When DEN is driven high, the serializer will return to the previous state as long as all other control pins remain static (TPWDNB, TRFB). When you drive the REN or RPWDNB pin low, the Deserializer enters TRI-STATE. Consequently, the receiver output pins (ROUT0-ROUT23) and RCLK will enter TRI-STATE. The LOCK output remains active, reflecting the state of the PLL. The Deserializer input pins are high impedance during receiver powerdown (RPWDNB low) and power-off (VDD = 0V). PRE-EMPHASIS The DS99R103 features a Pre-Emphasis mode used to compensate for long or lossy transmission media. Cable drive is enhanced with a user selectable Pre-Emphasis feature that provides additional output current during transitions to counteract cable loading effects. The transmission distance will be limited by the loss characteristics and quality of the media. Pre-Emphasis adds extra current during LVDS logic transition to reduce the cable loading effects and increase driving distance. In addition, Pre-Emphasis helps provide faster transitions, increased eye openings, and improved signal integrity. To enable the Pre-Emphasis function, the "PRE" pin requires one external resistor (Rpre) to Vss in order to set the additional current level. Pre-Emphasis strength is set via an external resistor (Rpre) applied from min to max (floating to 3k) at the "PRE" pin. A lower input resistor value on the "PRE" pin increases the magnitude of dynamic current during data transition. There is an internal current source based on the following formula: PRE = (Rpre 3k); IMAX = [(1.2/Rpre) X 20]. The ability of the DS99R103 to use the Pre-Emphasis feature will extend the transmission distance in most cases. The amount of Pre-Emphasis for a given media will depend on the transmission distance of the application. In general, too much Pre-Emphasis can cause over or undershoot at the receiver input pins. This can result in excessive noise, crosstalk and increased power dissipation. For short cables or distances, Pre-Emphasis may not be required. Signal quality measurements are recommended to determine the proper amount of PreEmphasis for each application. AC-COUPLING AND TERMINATION The DS99R103 and DS99R104 supports AC-coupled interconnects through integrated DC balanced encoding/decoding scheme. To use AC coupled connection between the Serializer and Deserializer, insert external AC coupling capacitors in series in the LVDS signal path as illustrated in Figure 19. The Deserializer input stage is designed for AC-coupling by providing a built-in AC bias network which sets the internal VCM to +1.2V. With AC signal coupling, capacitors provide the ac-coupling path to the signal input. For the high-speed LVDS transmissions, the smallest available package should be used for the AC coupling capacitor. This will help minimize degradation of signal quality due to package parasitics. The most common used capacitor value for the interface is 100 nF (0.1 F) capacitor. Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 Submit Documentation Feedback 17 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 www.ti.com A termination resistor across DOUT is also required for proper operation to be obtained. The termination resistor should be equal to the differential impedance of the media being driven. This should be in the range of 90 to 132. 100 is a typical value common used with standard 100 transmission media. This resistor is required for control of reflections and also to complete the current loop. It should be placed as close to the Serializer DOUT outputs to minimize the stub length from the pins. To match with the deferential impedance on the transmission line, the LVDS I/O are terminated with 100 resistors on Serializer DOUT outputs pins. PROGRESSIVE TURN-ON (PTO) Deserializer ROUT[23:0] outputs are grouped into three groups of eight, with each group switching about 0.5UI apart in phase to reduce EMI, simultaneous switching noise, and system ground bounce. Applications Information USING THE DS99R103 AND DS99R104 The DS99R103/DS99R104 Serializer/Deserializer (SERDES) pair sends 24 bits of parallel LVCMOS data over a serial LVDS link up to 960 Mbps. Serialization of the input data is accomplished using an on-board PLL at the Serializer which embeds clock with the data. The Deserializer extracts the clock/control information from the incoming data stream and deserializes the data. The Deserializer monitors the incoming clock information to determine lock status and will indicate lock by asserting the LOCK output high. POWER CONSIDERATIONS An all CMOS design of the Serializer and Deserializer makes them inherently low power devices. Additionally, the constant current source nature of the LVDS outputs minimize the slope of the speed vs. IDD curve of CMOS designs. NOISE MARGIN The Deserializer noise margin is the amount of input jitter (phase noise) that the Deserializer can tolerate and still reliably recover data. Various environmental and systematic factors include: * Serializer: TCLK jitter, VDD noise (noise bandwidth and out-of-band noise) * Media: ISI, VCM noise * Deserializer: VDD noise For a graphical representation of noise margin, please see Figure 16. TRANSMISSION MEDIA The Serializer and Deserializer can be used in point-to-point configuration, through a PCB trace, or through twisted pair cable. In a point-to-point configuration, the transmission media needs be terminated at both ends of the transmitter and receiver pair. Interconnect for LVDS typically has a differential impedance of 100. Use cables and connectors that have matched differential impedance to minimize impedance discontinuities. In most applications that involve cables, the transmission distance will be determined on data rates involved, acceptable bit error rate and transmission medium. LIVE LINK INSERTION The Serializer and Deserializer devices support live pluggable applications. The "Hot Inserted" operation on the serial interface does not disrupt communication data on the active data lines. The automatic receiver lock to random data "plug & go" live insertion capability allows the DS99R104 to attain lock to the active data stream during a live insertion event. 18 Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 DS99R103, DS99R104 www.ti.com SNLS241D - MARCH 2007 - REVISED APRIL 2013 PCB LAYOUT AND POWER SYSTEM CONSIDERATIONS Circuit board layout and stack-up for the LVDS SERDES devices should be designed to provide low-noise power feed to the device. Good layout practice will also separate high frequency or high-level inputs and outputs to minimize unwanted stray noise pickup, feedback and interference. Power system performance may be greatly improved by using thin dielectrics (2 to 4 mils) for power / ground sandwiches. This arrangement provides plane capacitance for the PCB power system with low-inductance parasitics, which has proven especially effective at high frequencies, and makes the value and placement of external bypass capacitors less critical. External bypass capacitors should include both RF ceramic and tantalum electrolytic types. RF capacitors may use values in the range of 0.01 F to 0.1 F. Tantalum capacitors may be in the 2.2 F to 10 F range. Voltage rating of the tantalum capacitors should be at least 5X the power supply voltage being used. Surface mount capacitors are recommended due to their smaller parasitics. When using multiple capacitors per supply pin, locate the smaller value closer to the pin. A large bulk capacitor is recommend at the point of power entry. This is typically in the 50F to 100F range and will smooth low frequency switching noise. It is recommended to connect power and ground pins directly to the power and ground planes with bypass capacitors connected to the plane with via on both ends of the capacitor. Connecting power or ground pins to an external bypass capacitor will increase the inductance of the path. A small body size X7R chip capacitor, such as 0603, is recommended for external bypass. Its small body size reduces the parasitic inductance of the capacitor. The user must pay attention to the resonance frequency of these external bypass capacitors, usually in the range of 20-30 MHz range. To provide effective bypassing, multiple capacitors are often used to achieve low impedance between the supply rails over the frequency of interest. At high frequency, it is also a common practice to use two vias from power and ground pins to the planes, reducing the impedance at high frequency. Some devices provide separate power and ground pins for different portions of the circuit. This is done to isolate switching noise effects between different sections of the circuit. Separate planes on the PCB are typically not required. Pin Description tables typically provide guidance on which circuit blocks are connected to which power pin pairs. In some cases, an external filter many be used to provide clean power to sensitive circuits such as PLLs. Use at least a four layer board with a power and ground plane. Locate LVCMOS (LVTTL) signals away from the LVDS lines to prevent coupling from the LVCMOS lines to the LVDS lines. Closely-coupled differential lines of 100 are typically recommended for LVDS interconnect. The closely coupled lines help to ensure that coupled noise will appear as common-mode and thus is rejected by the receivers. The tightly coupled lines will also radiate less. Termination of the LVDS interconnect is required. For point-to-point applications, termination should be located at both ends of the devices. Nominal value is 100 to match the line's differential impedance. Place the resistor as close to the transmitter DOUT outputs and receiver RIN inputs as possible to minimize the resulting stub between the termination resistor and device. LVDS INTERCONNECT GUIDELINES See AN-1108 (Literature Number SNLA008) and AN-905 (Literature Number SNLA035) for full details. * Use 100 coupled differential pairs * Use the S/2S/3S rule in spacings - S = space between the pair - 2S = space between pairs - 3S = space to LVCMOS/LVTTL signal * Minimize the number of VIA * Use differential connectors when operating above 500Mbps line speed * Maintain balance of the traces * Minimize skew within the pair * Terminate as close to the TX outputs and RX inputs as possible Additional general guidance can be found in the LVDS Owner's Manual - available in PDF format from the TI web site at: http://www.ti.com/ww/en/analog/interface/lvds.shtml Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 Submit Documentation Feedback 19 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 DOUT+ www.ti.com 100 nF RIN+ 100 nF 100: 100: DOUT- 100 nF RIN- 100 nF Figure 19. AC Coupled Application DS99R103 (SER) DIN0 DIN1 DIN2 DIN3 DIN4 DIN5 DIN6 DIN7 DIN8 DIN9 DIN10 DIN11 DIN12 DIN13 DIN14 DIN15 LVCMOS Parallel Interface DIN16 DIN17 DIN18 DIN19 DIN20 DIN21 DIN22 DIN23 3.3V VDDDR C1 C4 C2 C5 C3 C6 VDDPT0 VDDPT1 VDDIT VDDL VDDT DOUT+ C7 TCLK GPOs if used, or tie High (ON) TPWDNB Serial LVDS Interface R1 3.3V DEN TRFB PRE Notes: TPWDNB = System GPO DEN = High (ON) TRFB = High (Rising edge) VODSEL = Low (400mV) PRE = Rpre RESRVD = Low DCAOFF = Low DCBOFF = Low R2 VODSEL DCAOFF DCBOFF RESRVD DOUT- VSSDR VSSPT0 VSSPT1 VSST VSSL VSSIT VSS C8 C1 to C3 = 0.01 P F C4 to C6 = 0.1 P F C7, C8 = 100 nF; 50WVDC, NPO or X7R R1 = 100: R2 = Open (OFF) or Rpre 8 3 k: (ON) (cable specific) Figure 20. DS99R103 Typical Application Connection 20 Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 DS99R103, DS99R104 www.ti.com SNLS241D - MARCH 2007 - REVISED APRIL 2013 DS99R104 (DES) 3.3V 3.3V VDDPR0 VDDPR1 VDDIR C5 C1 VDDOR1 VDDOR2 VDDOR3 C6 RIN+ 100: RIN- 3.3V REN RRFB Notes: RPWDNB = System GPO REN = High (ON) RRFB = High (Rising edge) RESRVD = Low RESRVD VSSPR0 VSSPR1 VSSR0 VSSR1 VSSIR VSSOR1 VSSOR2 VSSOR3 C8 ROUT8 ROUT9 ROUT10 ROUT11 ROUT12 ROUT13 ROUT14 ROUT15 C10 RPWDNB C4 ROUT0 ROUT1 ROUT2 ROUT3 ROUT4 ROUT5 ROUT6 ROUT7 C9 GPO if used, or tie High (ON) C7 VDDR0 VDDR1 C2 Serial LVDS Interface C3 LVCMOS Parallel Interface ROUT16 ROUT17 ROUT18 ROUT19 ROUT20 ROUT21 ROUT22 ROUT23 C1 to C4 = 0.01 P F C5 to C8 = 0.1 P F C9, C10 = 100 nF; 50WVDC, NPO or X7R RCLK LOCK Figure 21. DS99R104 Typical Application Connection TRUTH TABLES DS99R103 Serializer Truth Table TPWDNB (Pin 9) DEN (Pin 18) Tx PLL Status (Internal) LVDS Outputs (Pins 19 and 20) L X X Hi Z Hi Z H L X H H Not Locked Hi Z H H Locked Serialized Data with Embedded Clock DS99R104 Deserializer Truth Table RPWDNB (Pin 1) REN (Pin 48) Rx PLL Status (Internal) ROUTn and RCLK (See DS99R104 Pin Diagram) LOCK (Pin 17) L X X Hi Z Hi Z H L X Hi Z L = PLL Unocked; H = PLL Locked H H Not Locked Hi Z L H H Locked Data and RCLK Active H Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 Submit Documentation Feedback 21 DS99R103, DS99R104 SNLS241D - MARCH 2007 - REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision C (April 2013) to Revision D * 22 Page Changed layout of National Data Sheet to TI format .......................................................................................................... 21 Submit Documentation Feedback Copyright (c) 2007-2013, Texas Instruments Incorporated Product Folder Links: DS99R103 DS99R104 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (C) Device Marking (3) (4/5) (6) DS99R103TSQ/NOPB ACTIVE WQFN NJU 48 250 RoHS & Green SN Level-2-260C-1 YEAR DS99R103T DS99R103TSQX/NOPB ACTIVE WQFN NJU 48 2500 RoHS & Green SN Level-2-260C-1 YEAR DS99R103TVS/NOPB ACTIVE TQFP PFB 48 250 RoHS & Green SN Level-3-260C-168 HR DS99R103 TVS DS99R104TSQ/NOPB ACTIVE WQFN NJU 48 250 RoHS & Green SN Level-2-260C-1 YEAR DS99R104T DS99R104TSQX/NOPB ACTIVE WQFN NJU 48 2500 RoHS & Green SN Level-2-260C-1 YEAR -40 to 85 DS99R104T DS99R104TVS/NOPB ACTIVE TQFP PFB 48 250 RoHS & Green SN Level-3-260C-168 HR -40 to 85 DS99R104 TVS -40 to 85 DS99R103T (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of <=1000ppm threshold. Antimony trioxide based flame retardants must also meet the <=1000ppm threshold requirement. (3) MSL, Peak Temp. - The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) There may be additional marking, which relates to the logo, the lot trace code information, or the environmental category on the device. (5) Multiple Device Markings will be inside parentheses. Only one Device Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Device Marking for that device. (6) Lead finish/Ball material - Orderable Devices may have multiple material finish options. Finish options are separated by a vertical ruled line. Lead finish/Ball material values may wrap to two lines if the finish value exceeds the maximum column width. Addendum-Page 1 Samples PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 Important Information and Disclaimer:The information provided on this page represents TI's knowledge and belief as of the date that it is provided. TI bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. TI has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. TI and TI suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. In no event shall TI's liability arising out of such information exceed the total purchase price of the TI part(s) at issue in this document sold by TI to Customer on an annual basis. Addendum-Page 2 PACKAGE MATERIALS INFORMATION www.ti.com 15-Sep-2018 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant DS99R103TSQ/NOPB WQFN NJU 48 250 178.0 16.4 7.3 7.3 1.3 12.0 16.0 Q1 DS99R103TSQX/NOPB WQFN NJU 48 2500 330.0 16.4 7.3 7.3 1.3 12.0 16.0 Q1 DS99R104TSQ/NOPB WQFN NJU 48 250 178.0 16.4 7.3 7.3 1.3 12.0 16.0 Q1 DS99R104TSQX/NOPB WQFN NJU 48 2500 330.0 16.4 7.3 7.3 1.3 12.0 16.0 Q1 Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 15-Sep-2018 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) DS99R103TSQ/NOPB WQFN NJU 48 250 210.0 185.0 35.0 DS99R103TSQX/NOPB WQFN NJU 48 2500 367.0 367.0 38.0 DS99R104TSQ/NOPB WQFN NJU 48 250 210.0 185.0 35.0 DS99R104TSQX/NOPB WQFN NJU 48 2500 367.0 367.0 38.0 Pack Materials-Page 2 MECHANICAL DATA NJU0048D SQA48D (Rev A) www.ti.com MECHANICAL DATA MTQF019A - JANUARY 1995 - REVISED JANUARY 1998 PFB (S-PQFP-G48) PLASTIC QUAD FLATPACK 0,27 0,17 0,50 36 0,08 M 25 37 24 48 13 0,13 NOM 1 12 5,50 TYP 7,20 SQ 6,80 9,20 SQ 8,80 Gage Plane 0,25 0,05 MIN 0- 7 1,05 0,95 Seating Plane 0,75 0,45 0,08 1,20 MAX 4073176 / B 10/96 NOTES: A. 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