TXS0108E www.ti.com ..................................................................................................................................... SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 8-BIT BIDIRECTIONAL VOLTAGE-LEVEL TRANSLATOR FOR OPEN-DRAIN AND PUSH-PULL APPLICATIONS FEATURES 1 * ZXY PACKAGE (BOTTOM VIEW) 1 A2 A3 A4 A5 A6 A7 A8 OE 1 20 2 19 3 18 4 17 5 16 6 15 7 14 8 13 9 12 10 11 3 4 5 D C B A TERMINAL ASSIGNMENTS 1 2 3 4 5 D VCCB B2 B4 B6 B8 C B1 B3 B5 B7 GND B A1 A3 A5 A7 OE A VCCA A2 A4 A6 A8 PW PACKAGE (TOP VIEW) A1 VCCA 2 RGY PACKAGE (TOP VIEW) B1 V B2 B3 B4 B5 B6 B7 B8 GND VCCA A2 A3 A4 A5 A6 A7 A8 B1 * IEC 61000-4-2 ESD (B Port) - 8-kV Contact Discharge - 6-kV Air-Gap Discharge 1 20 2 19 3 18 4 5 6 7 17 Exposed Center Pad 16 15 14 8 13 9 12 10 11 GND * * A1 * No Direction-Control Signal Needed Max Data Rates - 60 Mbps (Push Pull) - 2 Mbps (Open Drain) 1.2 V to 3.6 V on A Port and 1.65 V to 5.5 V on B Port (VCCA VCCB) No Power-Supply Sequencing Required - Either VCCA or VCCB Can Be Ramped First Latch-Up Performance Exceeds 100 mA Per JESD 78, Class II ESD Protection Exceeds JESD 22 (A Port) - 2000-V Human-Body Model (A114-B) - 150-V Machine Model (A115-A) - 1000-V Charged-Device Model (C101) OE * * VCCB B2 B3 B4 B5 B6 B7 B8 The exposed center pad, if used, must be connected as a secondary ground or left electrically open. 1 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. 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) 2007-2008, Texas Instruments Incorporated TXS0108E SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 ..................................................................................................................................... www.ti.com DESCRIPTION/ORDERING INFORMATION This 8-bit noninverting translator uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 1.65 V to 5.5 V. This allows for low-voltage bidirectional translation between any of the 1.2-V, 1.5-V, 1.8-V, 2.5-V, 3.3-V, and 5-V voltage nodes. When the output-enable (OE) input is low, all outputs are placed in the high-impedance state. To ensure the high-impedance state during power up or power down, OE should be tied to GND through a pulldown resistor; the minimum value of the resistor is determined by the current-sourcing capability of the driver. ORDERING INFORMATION TA PACKAGE -40C to 85C (1) (2) (1) (2) ORDERABLE PART NUMBER TOP-SIDE MARKING QFN - RGY Reel of 1000 TXS0108ERGYR YF08E TSSOP - PW Reel of 2000 TXS0108EPWR YF08E UFBGA - ZXY Reel of 2500 TXS0108EZXYR YF08E Package drawings, thermal data, and symbolization are available at www.ti.com/packaging. For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. TYPICAL OPERATING CIRCUIT 1.8 V 3.3 V VCCA V CCB OE TXS0108E 1.8-V System Controller Data 2 A1 B1 A2 B2 A3 B3 A4 B4 A5 B5 A6 B6 A7 B7 A8 B8 Submit Documentation Feedback 3.3-V System Data Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E TXS0108E www.ti.com ..................................................................................................................................... SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) VCCA VCCB MIN MAX -0.5 4.6 V -0.5 5.5 V A port -0.5 4.6 B port -0.5 6.5 A port -0.5 4.6 B port -0.5 6.5 A port -0.5 VCCA + 0.5 B port -0.5 VCCB + 0.5 Supply voltage range UNIT VI Input voltage range (2) VO Voltage range applied to any output in the high-impedance or power-off state (2) VO Voltage range applied to any output in the high or low state (2) (3) IIK Input clamp current VI < 0 -50 mA IOK Output clamp current VO < 0 -50 mA IO Continuous output current 50 mA 100 mA 150 C Continuous current through VCCA, VCCB, or GND Tstg (1) (2) (3) Storage temperature range -65 V V V Stresses beyond those listed under "absolute maximum ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under "recommended operating conditions" is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. The input and output negative-voltage ratings may be exceeded if the input and output current ratings are observed. The value of VCCA and VCCB are provided in the recommended operating conditions table. THERMAL IMPEDANCE RATINGS UNIT PW package (1) JA (1) (2) Package thermal impedance 70 RGY package (2) 80.9 ZXY package (1) 47 C/W The package thermal impedance is calculated in accordance with JESD 51-5. The package thermal impedance is calculated in accordance with JESD 51-7. Submit Documentation Feedback Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E 3 TXS0108E SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 ..................................................................................................................................... www.ti.com RECOMMENDED OPERATING CONDITIONS (1) (2) VCCA VCCA VCCB Supply voltage (3) 1.2 V to 1.95 V A-Port I/Os VIH High-level input voltage 1.95 V to 3.6 V B-Port I/Os 1.2 V to 3.6 V OE 1.2 V to 1.95 V A-Port I/Os VIL VCCB Low-level input voltage 1.95 V to 3.6 V B-Port I/Os OE 1.65 V to 5.5 V 1.65 V to 5.5 V 1.65 V to 5.5 V 1.2 V to 3.6 V 1.65 V to 5.5 V 1.2 V to 3.6 V 1.65 V to 5.5 V MIN MAX 1.2 3.6 1.65 5.5 VCCI - 0.2 VCCI VCCI - 0.4 VCCI VCCI - 0.4 VCCI VCCA x 0.65 5.5 0 0.15 0 0.15 0 0.15 0 VCCA x 0.35 UNIT V V V A-Port I/Os push-pull driving t/v Input transition rise or fall rate TA Operating free-air temperature B-Port I/Os push-pull driving 10 ns/V 85 C Control input (1) (2) (3) 4 -40 VCCI is the VCC associated with the data input port. VCCO is the VCC associated with the output port. VCCA must be less than or equal to VCCB, and VCCA must not exceed 3.6 V. Submit Documentation Feedback Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E TXS0108E www.ti.com ..................................................................................................................................... SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 ELECTRICAL CHARACTERISTICS (1) (2) (3) over recommended operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS IOH = -20 A, VIB VCCB - 0.4 V VOHA VOLA 1.2 V 1.4 V to 3.6 V IOZ 0.4 IOL = 400 A, VIB 0.15 V 3V 0.55 1.2 V 1.4 V to 3.6 V VI = VCCI or GND 0.4 1.65 V to 5.5 V V V VCCB x 0.67 1.65 V 0.4 2.3 V 0.4 3V 0.55 4.5 V 0.55 V 1 2 A 1.2 V 1.65 V to 5.5 V 1 2 A 1.2 V 1.65 V to 5.5 V 1.4 V to 3.6 V 2.3 V to 5.5 V 2 3.6 V 0V 2 1.5 2 0V 5.5 V 1.2 V 1.65 V to 5.5 V 1.4 V to 3.6 V 2.3 V to 5.5 V 6 3.6 V 0V -1 0V 5.5 V ICCZA VI = VO = Open, IO = 0, OE = GND 1.4 V to 3.6 V ICCZB VI = VO = Open, IO = 0, OE = GND 1.4 V to 3.6 V (1) (2) (3) 1.65 V to 5.5 V 1.65 V to 5.5 V 1.4 V to 3.6 V B port 0.4 1.2 V ICCA + ICCB Cio 0.25 1.2 V to 3.6 V VI = VCCI or GND, IO = 0 A port UNIT V VCCA x 0.67 2.3 V VI = VO = Open, IO = 0 OE VCCA x 0.67 IOL = 300 A, VIB 0.15 V ICCB Ci MAX 1.65 V VI = VO = Open, IO = 0 ICCA MIN IOL = 220 A, VIB 0.15 V IOL = 620 A, VIA 0.15 V A or B port MAX 1.4 V IOL = 400 A, VIA 0.15 V OE 1.65 V to 5.5 V -40C to 85C TYP IOL = 180 A, VIB 0.15 V IOL = 300 A, VIA 0.15 V II TA = 25C MIN 1.2 V IOL = 220 A, VIA 0.15 V VOLB VCCB IOL = 135 A, VIB 0.15 V IOH = -20 A, VIA VCCA - 0.2 V VOHB VCCA 1.2 V 1.2 V 1.2 V 3.3 V 3.3 V 2.3 V to 5.5 V 1.65 V to 5.5 V 1.65 V to 5.5 V 3.3 V 3.3 V A -1 1.5 A 1 3 8 0.05 2 4 6 4.5 5.5 6 7 5.5 6 A A A pF pF VCCO is the VCC associated with the output port. VCCI is the VCC associated with the input port. VCCA must be less than or equal to VCCB, and VCCA must not exceed 3.6 V. Submit Documentation Feedback Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E 5 TXS0108E SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 ..................................................................................................................................... www.ti.com TIMING REQUIREMENTS TA=25C, VCCA = 1.2 V Data rate tw Pulse duration VCCB = 1.8 V VCCB = 2.5 V VCCB = 3.3 V VCCB = 5 V TYP TYP TYP TYP Push-pull driving 20 20 20 20 Open-drain driving 2 2 2 2 Push-pull driving Data inputs Open-drain driving UNIT Mbps 50 50 50 50 500 500 500 500 ns TIMING REQUIREMENTS over recommended operating free-air temperature range, VCCA = 1.5 V 0.1 V (unless otherwise noted) VCCB = 1.8 V 0.15 V MIN Data rate MAX Push-pull driving Pulse duration Push-pull driving Data inputs Open-drain driving MIN MAX VCCB= 3.3 V 0.3 V MIN VCCB= 5 V 0.5 V MAX MIN UNIT MAX 40 60 60 50 2 2 2 2 Open-drain driving tw VCCB = 2.5 V 0.2 V 25 16.7 16.7 20 500 500 500 500 Mbps ns TIMING REQUIREMENTS over recommended operating free-air temperature range, VCCA = 1.8 V 0.15 V (unless otherwise noted) VCCB = 1.8 V 0.15 V MIN Data rate Push-pull driving Open-drain driving tw Pulse duration Push-pull driving Open-drain driving Data inputs VCCB = 2.5 V 0.2 V VCCB= 3.3 V 0.3 V VCCB= 5 V 0.5 V MIN UNIT MAX MIN MAX MIN MAX 40 60 60 60 2 2 2 2 25 16.7 16.7 16.7 500 500 500 500 MAX Mbps ns TIMING REQUIREMENTS over recommended operating free-air temperature range, VCCA = 2.5 V 0.2 V (unless otherwise noted) VCCB = 2.5 V 0.2 V MIN Data rate tw Pulse duration Push-pull driving VCCB = 3.3 V 0.3 V MAX Open-drain driving Data inputs MAX MIN UNIT MAX 60 60 60 2 2 2 Open-drain driving Push-pull driving MIN VCC = 5 V 0.5 V 16.7 16.7 16.7 500 500 500 Mbps ns TIMING REQUIREMENTS over recommended operating free-air temperature range, VCCA = 3.3 V 0.3 V (unless otherwise noted) VCCB = 3.3 V 0.3 V MIN Data rate tw 6 Pulse duration Push-pull driving Open-drain driving Push-pull driving Open-drain driving Data inputs Submit Documentation Feedback VCC = 5 V 0.5 V MAX MIN UNIT MAX 60 60 2 2 16.7 16.7 500 500 Mbps ns Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E TXS0108E www.ti.com ..................................................................................................................................... SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 SWITCHING CHARACTERISTICS over recommended operating free-air temperature range, VCCA = 1.2 V (unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) tPHL A B tPLH tPHL B A ten OE A or B tdis OE A or B tPLH trA A-port rise time trB B-port rise time tfA A-port fall time tfB B-port fall time tSK(O) Channel-to-channel skew Max data rate A or B TEST CONDITIONS VCCB = 1.8 V 0.15 V VCCB = 2.5 V 0.2 V VCCB = 3.3 V 0.3 V VCCB = 5 V 0.5 V TYP TYP TYP TYP UNIT Push-pull driving 6.5 5.9 5.7 5.5 Open-drain driving 11.9 11.1 11.0 11.1 Push-pull driving 7.1 6.3 6.2 6.6 Open-drain driving 293 236 197 152 Push-pull driving 6.4 6 5.8 5.6 Open-drain driving 8.5 6.8 6.2 5.9 Push-pull driving 5.6 4.1 3.6 3.2 Open-drain driving 312 248 192 132 200 200 200 200 ns 16.8 13.9 13.2 13.5 ns Push-pull driving Push-pull driving 7.9 6.7 6.5 6.4 Open-drain driving 296 238 185 127 Push-pull driving 6.3 3.3 1.8 1.5 Open-drain driving 236 164 115 60 Push-pull driving 5.8 4.8 4.3 3.8 Open-drain driving 5.9 4.7 4.1 3.5 Push-pull driving 4.6 2.8 2.2 1.9 Open-drain driving 4.5 2.7 2.2 1.9 1 1 1 1 Push-pull driving 20 20 20 20 Open-drain driving 2 2 2 2 Push-pull driving Submit Documentation Feedback Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E ns ns ns ns ns ns Mbps 7 TXS0108E SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 ..................................................................................................................................... www.ti.com SWITCHING CHARACTERISTICS over recommended operating free-air temperature range, VCCA = 1.5 V 0.1 V (unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) VCCB = 1.8 V 0.15 V A B tPLH Open-drain driving MAX 4 14.4 B A ten OE A or B tdis OE A or B tPLH Open-drain driving 182 trA A-port rise time trB B-port rise time tfA A-port fall time tfB B-port fall time tSK(O) Channel-to-channel skew Max data rate A or B 3.6 12.8 720 3.4 143 Push-pull driving MAX 3.5 12.2 3.1 9.6 603 473 2.8 8.5 81 384 2.5 7.5 519 1.6 84 407 200 200 200 ns 28.1 22 20.1 19.6 ns 3.5 13.1 3 9.8 3.1 9 3.2 8.3 Open-drain driving 147 982 115 716 92 592 66 481 Push-pull driving 2.9 11.4 1.9 7.4 0.9 4.7 0.7 2.6 Open-drain driving 135 1020 91 756 58 653 20 370 Push-pull driving 2.3 9.9 1.7 7.7 1.6 6.8 1.7 6 Open-drain driving 2.4 10 2.1 7.9 1.7 7 1.5 6.2 2 8.7 1.3 5.5 0.9 3.8 0.8 3.1 1.2 11.5 1.3 8.6 1 9.6 0.5 7.7 1 1 1 Open-drain driving Push-pull driving Push-pull driving Open-drain driving ns 200 Push-pull driving Push-pull driving ns 12 5.1 118 12 9.7 11 6.2 147 8.6 3.5 9.8 114 UNIT MIN MAX 8.6 11.1 13.2 745 554 VCCB = 5 V 0.5 V MIN 10 9.5 186 VCCB = 3.3 V 0.3 V 9.2 12.7 Push-pull driving Open-drain driving MAX 12 Push-pull driving tPHL MIN 11 Push-pull driving Open-drain driving VCCB = 2.5 V 0.2 V MIN Push-pull driving tPHL 8 TEST CONDITIONS 1.1 1 40 60 60 50 2 2 2 2 Submit Documentation Feedback ns ns ns ns Mbp s Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E TXS0108E www.ti.com ..................................................................................................................................... SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 SWITCHING CHARACTERISTICS over recommended operating free-air temperature range, VCCA = 1.8 V 0.15 V(unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) VCCB = 1.8 V 0.15 V A B tPLH Open-drain driving MAX 3.6 11.4 194 B A ten OE A or B tdis OE A or B tPLH Open-drain driving trA A-port rise time trB B-port rise time tfA A-port fall time tfB B-port fall time tSK(O) Channel-to-channel skew A or B 3.4 12.1 155 Push-pull driving 733 MIN 9.9 584 2.8 8.5 578 MAX MIN 9.3 126 466 7.3 90 346 2.1 6.2 459 5 93 323 200 200 ns 25.1 18.8 16.5 15.3 ns 11.9 2.6 8.6 2.7 7.8 2.8 7.2 Open-drain driving 155 996 124 691 100 508 72 350 Push-pull driving 2.8 10.5 1.8 7.2 1.2 5.2 0.7 2.7 Open-drain driving 132 1001 106 677 73 546 32 323 Push-pull driving 2.1 8.8 1.6 6.6 1.4 5.7 1.4 4.9 Open-drain driving 2.2 9 1.7 6.7 1.4 5.8 1.2 5.2 2 8.3 1.3 5.4 0.9 3.9 0.7 3 0.8 10.5 0.7 10.7 1 9.6 0.6 7.8 Push-pull driving Push-pull driving Open-drain driving ns 200 3.1 Open-drain driving ns 200 Push-pull driving Push-pull driving UNIT 7 5.8 129 8.9 6.3 7.4 2.5 MA X 5.6 3.1 6.5 7 159 VCCB = 5 V 0.5 V 5.7 3.1 8 10.2 197 MAX 2.1 9.8 Push-pull driving Open-drain driving 729 VCCB = 3.3 V 0.3 V 6.4 3.2 9 Push-pull driving tPHL MIN 8.2 Push-pull driving Open-drain driving VCCB = 2.5 V 0.2 V MIN Push-pull driving tPHL Max data rate TEST CONDITIONS 1 1 1 1 40 60 60 60 2 2 2 2 Submit Documentation Feedback Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E ns ns ns ns Mbps 9 TXS0108E SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 ..................................................................................................................................... www.ti.com SWITCHING CHARACTERISTICS over recommended operating free-air temperature range, VCCA = 2.5 V 0.2 V (unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) A B tPLH Open-drain driving B A ten OE A or B tdis OE A or B tPLH trA A-port rise time 149 trB B-port rise time tfA A-port fall time tfB B-port fall time tSK(O) Channel-to-channel skew A or B 2.3 6.3 592 2.5 7.3 595 488 2.2 6 93 481 368 4.9 3.5 94 345 200 200 ns 15.7 12.9 11.2 ns 2 7.3 2.1 6.4 2.2 5.8 110 692 93 529 68 369 Push-pull driving 1.8 6.5 1.3 5.1 0.7 3.4 Open-drain driving 107 693 79 483 41 304 Push-pull driving 1.5 5.7 1.2 4.7 1.3 3.8 Open-drain driving 1.5 5.6 1.2 4.7 1.1 4 Push-pull driving 1.4 5.4 0.9 4.1 0.7 3 Open-drain driving 0.4 14.2 0.5 19.4 0.4 3 Push-pull driving Open-drain driving 1 1.2 1 60 60 60 2 2 2 Submit Documentation Feedback ns 200 Open-drain driving Push-pull driving ns 4.2 1.8 4.4 126 5.8 3.9 4.7 5.9 150 3.7 2.2 4.3 125 UNIT MIN MAX 4 5.4 Push-pull driving Push-pull driving MAX 5.2 Push-pull driving Open-drain driving 6.9 VCCB = 5 V 0.5 V MIN 5 2.4 Push-pull driving Open-drain driving VCCB = 3.3 V 0.3 V MIN MAX Push-pull driving Open-drain driving tPHL 10 VCCB = 2.5 V 0.2 V Push-pull driving tPHL Max data rate TEST CONDITIONS ns ns ns ns Mbps Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E TXS0108E www.ti.com ..................................................................................................................................... SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 SWITCHING CHARACTERISTICS over recommended operating free-air temperature range, VCCA = 3.3 V 0.3 V (unless otherwise noted) PARAMETER FROM (INPUT) TO (OUTPUT) MIN A 2 111 B A ten OE A or B tdis OE A or B 2.1 trA A-port rise time trB B-port rise time tfA A-port fall time tfB B-port fall time tSK(O) Channel-to-channel skew 112 Push-pull driving 352 4.5 449 86 339 200 200 ns 11.9 9.8 ns 1.8 5.7 1.9 5 Open-drain driving 75 446 57 337 Push-pull driving 1.5 5 1 3.6 Open-drain driving 72 427 40 290 Push-pull driving 1.2 4.5 1.1 3.5 Open-drain driving 1.1 4.4 1 3.7 Push-pull driving 1.1 4.2 0.8 3.1 1 4.2 0.8 3.1 Push-pull driving 1 Push-pull driving Open-drain driving ns 4.3 Push-pull driving Open-drain driving A or B 1.7 3.8 Open-drain driving ns 3.8 5.5 Push-pull driving tPLH 87 4.2 Open-drain driving 4.8 3.5 439 Push-pull driving tPHL 1.9 3.9 Open-drain driving UNIT MAX 3.1 5.3 Push-pull driving tPLH MIN 3.8 Open-drain driving B VCCB = 5 V 0.5 V MAX Push-pull driving tPHL Max data rate VCCB = 3.3 V 0.3 V TEST CONDITIONS ns ns ns 1 60 60 2 2 ns Mbps OPERATING CHARACTERISTICS TA=25C VCCA PARAMETER CpdA CpdB CpdA CpdB 1.2 V 1.2 V 1.5 V 1.8 V 5V 1.8 V 1.8 V 1.8 V TEST CONDITIONS 2.5 V 2.5 V 3.3 V 2.5 V 5V 3.3 V to 5 V VCCB UNIT TYP TYP TYP TYP TYP TYP TYP 5.9 5.7 5.9 5.9 6.7 6.9 8 10.2 10.3 9.9 9.7 9.7 9.4 9.8 29.9 22.2 21.5 20.8 21 23.4 23 B-port input, A-port output 22.9 16.7 16.7 16.8 17.8 20.8 20.9 A-port input, B-port output 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.06 0.01 0.01 0.01 0.01 0.01 0.01 0.06 0.01 0.01 0.01 0.01 0.03 0.02 0.06 0.01 0.01 0.01 0.01 0.03 0.02 A-port input, B-port output B-port input, A-port output A-port input, B-port output B-port input, A-port output A-port input, B-port output CL = 0, f = 10 MHz, tr= tf= 1ns, OE = VCCA (outputs enabled) CL = 0, f = 10 MHz, tr= tf= 1ns, OE = GND (outputs disabled) B-port input, A-port output pF pF Submit Documentation Feedback Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E 11 TXS0108E SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 ..................................................................................................................................... www.ti.com PRINCIPLES OF OPERATION Applications The TXS0108E can be used in level-translation applications for interfacing devices or systems operating at different interface voltages with one another. The TXS0108E is ideal for use in applications where an open-drain driver is connected to the data I/Os. The TXS0108E can also be used in applications where a push-pull driver is connected to the data I/Os, but the TXB0104 might be a better option for such push-pull applications. The TXS0108E device is a semi-buffered auto-direction-sensing voltage translator design is optimized for translation applications (e.g. MMC Card Interfaces) that require the system to start out in a low-speed open-drain mode and then switch to a higher speed push-pull mode. Architecture To address these application requirements, a semi-buffered architecture design is used and is illustrated below (see Figure 1). Edge-rate accelerator circuitry (for both the high-to-low and low-to-high edges), a High-Ron n-channel pass-gate transistor (on the order of 300 to 500 ) and pull-up resistors (to provide DC-bias and drive capabilities) are included to realize this solution. A direction-control signal (to control the direction of data flow from A to B or from B to A) is not needed. The resulting implementation supports both low-speed open-drain operation as well as high-speed push-pull operation. VCCB VCCA OS3 One-Shot Rpua Translator Rpub OS4 T1 One-Shot Bias R1 A P2 N2 B R2 Npass OS1 P1 One-Shot OS2 N1 One-Shot Translator T2 Figure 1. Architecture of a TXS01xx Cell When transmitting data from A to B ports, during a rising edge the One-Shot (OS3) turns on the PMOS transistor (P2) for a short-duration and this speeds up the low-to-high transition. Similarly, during a falling edge, when transmitting data from A to B, the One-Shot (OS4) turns on NMOS transistor (N2) for a short-duration and this speeds up the high-to-low transition. The B-port edge-rate accelerator consists of one-shots OS3 and OS4, Transistors P2 and N2 and serves to rapidly force the B port high or low when a corresponding transition is detected on the A port. When transmitting data from B to A ports, during a rising edge the One-Shot (OS1) turns on the PMOS transistor 12 Submit Documentation Feedback Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E TXS0108E www.ti.com ..................................................................................................................................... SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 (P1) for a short-duration and this speeds up the low-to-high transition. Similarly, during a falling edge, when transmitting data from B to A, the One-Shot (OS2) turns on NMOS transistor (N1) for a short-duration and this speeds up the high-to-low transition. The A-port edge-rate accelerator consists of one-shots OS1 and OS2, Transistors P1 and N1 components and form the edge-rate accelerator and serves to rapidly force the A port high or low when a corresponding transition is detected on the B port. Power Up During operation, ensure that VCCA VCCB at all times. During power-up sequencing, VCCA VCCB does not damage the device, so any power supply can be ramped up first. Enable and Disable The TXS0108E has an OE input that is used to disable the device by setting OE low, which places all I/Os in the Hi-Z state. The disable time (tdis) indicates the delay between the time when OE goes low and when the outputs actually get disabled (Hi-Z). The enable time (ten) indicates the amount of time the user must allow for the one-shot circuitry to become operational after OE is taken high. Pullup or Pulldown Resistors on I/O Lines Each A-port I/O has a pull-up resistor (Rpua) to VCCA and each B-port I/O has a pull-up resistor (Rpub) to VCCB. Rpua and Rpub have a value of 40 k when the output is driving low. Rpua and Rpub have a value of 4 k when the output is driving high. Rpua and Rpub are disabled when OE = Low. Submit Documentation Feedback Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E 13 TXS0108E SCES642B - DECEMBER 2007 - REVISED SEPTEMBER 2008 ..................................................................................................................................... www.ti.com PARAMETER MEASUREMENT INFORMATION VCCI VCCO VCCI VCCO DUT IN DUT IN OUT OUT 1 MW 15 pF 1 MW 15 pF DATA RATE, PULSE DURATION, PROPAGATION DELAY, OUTPUT RISE AND FALL TIME MEASUREMENT USING AN OPEN-DRAIN DRIVER DATA RATE, PULSE DURATION, PROPAGATION DELAY, OUTPUT RISE AND FALL TIME MEASUREMENT USING A PUSH-PULL DRIVER 2 x VCCO 50 kW From Output Under Test 15 pF S1 Open 50 kW LOAD CIRCUIT FOR ENABLE/DISABLE TIME MEASUREMENT TEST S1 tPZL/tPLZ tPHZ/tPZH 2 x VCCO Open tw VCCI VCCI/2 Input VCCI/2 0V VOLTAGE WAVEFORMS PULSE DURATION VCCA Output Control (low-level enabling) VCCA/2 0V tPLZ tPZL VCCI Input VCCI/2 VCCI/2 0V tPLH Output tPHL VCCO/2 VOH VCCO/2 VOL 0.9 y VCCO 0.1 y VCCO Output Waveform 1 S1 at 2 x VCCO (see Note B) Output Waveform 2 S1 at GND (see Note B) VCCA/2 VCCO VCCO/2 0.1 y VCCO VOL tPHZ tPZH VOH 0.9 y VCCO VCCO/2 0V tf tr VOLTAGE WAVEFORMS PROPAGATION DELAY TIMES VOLTAGE WAVEFORMS ENABLE AND DISABLE TIMES A. CL includes probe and jig capacitance. B. Waveform 1 is for an output with internal conditions such that the output is low, except when disabled by the output control. Waveform 2 is for an output with internal conditions such that the output is high, except when disabled by the output control. C. All input pulses are supplied by generators having the following characteristics: PRRv10 MHz, ZO = 50 , dv/dt 1 V/ns. D. The outputs are measured one at a time, with one transition per measurement. E. tPLZ and tPHZ are the same as tdis. F. tPZL and tPZH are the same as ten. G. tPLH and tPHL are the same as tpd. H. VCCI is the VCC associated with the input port. I. VCCO is the VCC associated with the output port. J. All parameters and waveforms are not applicable to all devices. Figure 2. Load Circuit and Voltage Waveforms 14 Submit Documentation Feedback Copyright (c) 2007-2008, Texas Instruments Incorporated Product Folder Link(s): TXS0108E PACKAGE OPTION ADDENDUM www.ti.com 30-Jan-2012 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Drawing Pins Package Qty Eco Plan (2) Lead/ Ball Finish MSL Peak Temp (3) (Requires Login) TXS0108EPWR ACTIVE TSSOP PW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TXS0108EPWRG4 ACTIVE TSSOP PW 20 2000 Green (RoHS & no Sb/Br) CU NIPDAU Level-1-260C-UNLIM TXS0108ERGYR ACTIVE VQFN RGY 20 3000 Green (RoHS & no Sb/Br) CU NIPDAU Level-2-260C-1 YEAR TXS0108EZXYR ACTIVE BGA MICROSTAR JUNIOR ZXY 20 2500 Green (RoHS & no Sb/Br) SNAGCU Samples Level-1-260C-UNLIM (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) Eco Plan - The planned eco-friendly classification: Pb-Free (RoHS), Pb-Free (RoHS Exempt), or Green (RoHS & no Sb/Br) - please check http://www.ti.com/productcontent for the latest availability information and additional product content details. TBD: The Pb-Free/Green conversion plan has not been defined. Pb-Free (RoHS): TI's terms "Lead-Free" or "Pb-Free" mean semiconductor products that are compatible with the current RoHS requirements for all 6 substances, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, TI Pb-Free products are suitable for use in specified lead-free processes. Pb-Free (RoHS Exempt): This component has a RoHS exemption for either 1) lead-based flip-chip solder bumps used between the die and package, or 2) lead-based die adhesive used between the die and leadframe. The component is otherwise considered Pb-Free (RoHS compatible) as defined above. Green (RoHS & no Sb/Br): TI defines "Green" to mean Pb-Free (RoHS compatible), and free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material) (3) MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. 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. 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Addendum-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 TAPE AND REEL INFORMATION *All dimensions are nominal Device TXS0108EPWR TXS0108ERGYR TXS0108EZXYR 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 TSSOP PW 20 2000 330.0 16.4 6.95 7.1 1.6 8.0 16.0 Q1 VQFN RGY 20 3000 330.0 12.4 3.8 4.8 1.6 8.0 12.0 Q1 ZXY 20 2500 330.0 12.4 2.8 3.3 1.0 4.0 12.0 Q2 BGA MI CROSTA R JUNI OR Pack Materials-Page 1 PACKAGE MATERIALS INFORMATION www.ti.com 14-Jul-2012 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) TXS0108EPWR TSSOP PW 20 2000 367.0 367.0 38.0 TXS0108ERGYR VQFN RGY 20 3000 367.0 367.0 35.0 TXS0108EZXYR BGA MICROSTAR JUNIOR ZXY 20 2500 340.5 338.1 20.6 Pack Materials-Page 2 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46C and to discontinue any product or service per JESD48B. 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