W91320N SERIES TONE/PULSE DIALER WITH HANDFREE LOCK AND HOLD FUNCTIONS GENERAL DESCRIPTION The W91320N series are Si-gate CMOS ICs that provide the necessary signals for tone or pulse dialing. The W91320N series provide one-key redial, handfree dialing, hold, redial, and lock functions. FEATURES * DTMF/pulse switchable dialer * 32-digit redial memory * Pulse-to-tone * Uses (*/T) keypad for long distance call operation 5 x 5 keyboard * Easy operation with redial, flash, pause, and */T keypads * Pause, pulse-to-tone (*/T) can be stored as a digit in memory * 0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out * Off-hook delay 300 mS in lock mode ( DP will keep low for 300 mS while off hook) * First key-in delay 300 mS output in lock mode * Dialing rate (10, 20 ppS ) selected by bonding option * Minimum tone output duration: 93 msec. * Minimum * Flash break time (73, 100, 300, 600 msec.) selectable by keypad, and the pause time is 1.0 sec. * On-chip * intertone pause: 93 msec. power-on reset Uses 3.579545 MHz crystal or ceramic resonator * Packaged in 18, 20, or 22-pin plastic DIP * The different dialers in the W91320N series are shown in the following table: TYPE NO. REPLACEMENT TYPE NO. PULSE (ppS) FLASH (mS) M/B HANDFREE DIALING LOCK PACKAGE (PINS) W91320N W91320 10 600/100/300/73 Pin - - 18 W91321N W91321 20 600/100/300/73 Pin - - 18 W91320AN W91320A 10 600/100/300/73 Pin Yes - 20 W91321AN W91321A 20 600/100/300/73 Pin Yes - 20 W91320LN W91322L 10 600/100/300/73 Pin - Yes 20 W91320ALN W91322AL 10 600/100/300/73 Pin Yes Yes 22 -1- Publication Release Date: May 1997 Revision A2 W91320N SERIES PIN CONFIGURATIONS C1 1 18 R4 C2 2 17 R3 C3 3 16 R2 C4 4 15 R1 H/P MUTE 5 14 VDD VSS 6 13 MODE XT 7 12 DTMF XT 8 11 DP/C5 T/P MUTE 9 10 HKS C1 1 20 R4 C2 2 19 R3 C3 3 18 R2 C4 4 17 R1 H/P MUTE 5 16 VDD VSS 6 15 MODE XT 7 14 DTMF XT 8 13 DP/C5 T/P MUTE 9 12 HKS 10 11 HFO HFI W91320N/W91321N W91320AN/W91321AN C1 1 22 R4 C1 1 20 R4 C2 2 21 R3 C2 2 19 R3 C3 3 20 R2 4 19 R1 C3 3 18 R2 C4 C4 4 17 R1 LOCK 5 18 VDD LOCK 5 16 VDD H/P MUTE 6 17 NC H/P MUTE 6 15 NC VSS 7 16 MODE VSS 7 14 MODE XT 8 15 DTMF XT 8 13 DTMF XT 9 14 DP/C5 XT 9 12 DP/C5 T/P MUTE 10 13 HKS 10 11 HKS HFI 11 12 HFO T/P MUTE W91320LN W91320ALN -2- W91320N SERIES PIN DESCRIPTION SYMBOL 18-PIN 20-PIN 22-PIN Column- 1-4 1-4 1-4 Row & & & Inputs 15-18 17-20 19-22 I/O I FUNCTION The keyboard inputs may be used with either the standard 5 x 5 keyboard or the inexpensive single contact (Form A) keyboard. Electronic input from a C can also be used. A valid key-in is defined as a single row being connected to a single column XT, XT 7, 8 7, 8 8, 9 I, O A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal or ceramic resonator. 10 O The T/P MUTE is a conventional CMOS N-channel open drain output. (8, 9, W91320LN only) T/P MUTE 9 9 (10, W91320LN only) MODE 13 15 The output transistor is switched on during dialing sequence, one-key redial break and flash break time. Otherwise, it is switched off. 16 I (14, Pulling mode pin to VSS places the dialer in tone mode. Pulling mode pin to VDD places the dialer in pulse mode. (10 ppS; 20 ppS for W91321N/321AN M/B = 40:60) W91320LN only) Floating mode pin places the dialer in pulse mode. (10 ppS; 20 ppS for W91321N/321AN M/B = 33.3:66.7) HKS 10 12 13 I (11, Hook switch input. HKS = VDD: On-hook state. Chip in sleeping mode, no operation. W91320LN only) HKS = VSS: Off-hook state. Chip is enable for normal operation. HKS pin is pulled to VDD by internal resistor. -3- Publication Release Date: May 1997 Revision A2 W91320N SERIES Pin Description, continued SYMBOL 18-PIN DP / C5 11 20-PIN 22-PIN I/O FUNCTION 13 14 O N-channel open drain dialing pulse output. Flash key will cause DP to be active in either tone mode or pulse mode. (12, W91320LN only) The timing diagram for pulse mode is shown in Figure 1(a, b, c, d). VDD, VSS 14, 6 16, 6 18, 7 I Power input pins. 6 O The H/P MUTE is a conventional inverter output. During pulse dialing, flash break, one-key redial break, and hold period, this output is active high; otherwise, it remains in low state. 17 - No connection. 15 O In pulse mode, this pin remains in low state at all time. (16, 7 W91320LN only) H/P MUTE 5 NC - 5 (6, W91320LN only) 15 (W91320LN only) DTMF 12 14 (13, In the tone mode, it will output a dual or single tone. W91320LN only) Detailed timing diagram for tone mode is shown in Figure 2(a, b, c, d). Output Frequency -4- Specified Actual Error % R1 697 699 +0.28 R2 770 766 -0.52 R3 852 848 -0.47 R4 941 948 +0.74 C1 1209 1216 +0.57 C2 1336 1332 -0.30 C3 1477 1472 -0.34 W91320N SERIES Pin Description, continued SYMBOL 18-PIN HFI, HFO - 20-PIN 22-PIN I/O 10, 11 11, 12 I, O (W91320AN/ 321AN) FUNCTION Handfree control pins. The handfree control state is toggled on by a low pulse on the HFI input pin. The status of the handfree control state is described in the following table: NEXT STATE CURRENT STATE Hook SW. HFO Input HFO Dialing Low HFI High Yes On Hook High HFI Low No Off Hook High HFI Low Yes Off Hook Low Yes On Hook Off Hook Low On Hook Low No Off Hook High On Hook High Yes HFI pin is pulled to VDD by internal resistor. Detailed timing diagrams are shown in Figure 3(a, b, c). LOCK - 5 5 I (6, W91320LN only) The function of this terminal is to prevent "0" dialing and "9" dialing under PABX system long distance call control. When the first key input after reset is 0 or 9, all key inputs, including the 0 or 9 key, become invalid and the chip generates no output. The telephone is reinitialized by a reset. LOCK PIN -5- FUNCTION Floating Normal dialing mode VDD "0," "9" dialing inhibited VSS "0" dialing inhibited Publication Release Date: May 1997 Revision A2 W91320N SERIES BLOCK DIAGRAM XT XT SYSTEM CLOCK GENERATOR HKS HFI LOCK CONTROL LOGIC READ/ WRITE COUNTER ROW (R1 to R4, Vx) MODE KEYBOARD INTERFACE H/P MUTE COLUMN (C1 to C4) DTMF RAM LOCATION LATCH D/A CONVERTER PULSE CONTROL LOGIC ROW & COLUMN PROGRAMMABLE COUNTER T/P MUTE DP/C5 HFO DATA LATCH & DECODER FUNCTIONAL DESCRIPTION Keyboard Operation C1 C2 C3 C4 1 2 3 4 5 6 F1 7 8 9 F2 H R3 /T 0 # R/P1 R R4 R/P2 R F3 F4 DP / C5 R1 R2 VX * R/P1, R/P2: Redial and pause function key, P1 is 3.6 sec. and P2 is 2.0 sec. * /T: in tone mode and PT in pulse mode F1, ..., F4: Flash keys, the flash break time of F1 = 600 mS, F2 = 100 mS, F3 = 300 mS, F4 = 73 mS * * H: Hold function key * R: One-key redial function Notes: D1, ..., Dn, D1', ..., Dn': 0, ..., 9, */T, # R/P: R/P1 or R/P2. Fn: F1, ..., F4 -6- W91320N SERIES Normal Dialing OFF HOOK (or ON HOOK & HFI o ), D1 , D2 , ..., Dn 1. D1, D2, ..., Dn will be dialed out. 2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits in normal dialing. Redialing 1. OFF HOOK Come (or ON HOOK ON HOOK , & OFF HOOK HFI o (or ), D1 ON HOOK , D2 , ..., & HFI o Dn ), , Busy, R/P a. The redial memory content will be dialed out. b. The R/P key can execute the redial function only as the first key-in after off-hook; otherwise, it executes pause function. c. If redialing length oversteps 32 digits, the redialing function will be inhibited. 2. OFF HOOK (or ON HOOK & HFI o ), D1 , D2 , ..., Dn , Busy, R a. The one-key redialing function timing diagram is shown in Figure 4. b. If the dialing of D1 to Dn is finished, pressing the R key will cause the pulse output pin to go low for 2.2 seconds break time and 0.6 seconds pause time will automatically be added. c. If the pulses of the dialed digits d. The redial function by e. The R D1 to Dn have not finished, R will be ignored. R key has no break time (2.2 sec.) if it is the first key in after off-hook. key uses the same redial buffer as the redial function by R/P1 or R/P2 key, and it is actived during normal dialing or repertory dialing. Access Pause OFF HOOK (or ON HOOK & HFI o ), D1 , D2 , R/P , D3 , ..., Dn 1. The pause function is executed in normal dialing, redial dialing, or memory dialing. 2. The pause duration of 2.0 or 3.6 seconds per pause is selected by keypad, but only one pause time can be stored in memory. 3. The detailed timing diagram for the pause function is shown in Figure 5. Pulse-to-tone (*/T) OFF HOOK D2' , ..., (or ON HOOK & HFI o ), D1 , D2 , ..., Dn , */T , D1' , Dn' -7- Publication Release Date: May 1997 Revision A2 W91320N SERIES 1. If the mode switch is set to pulse mode, then the output signal will be: D1, D2, ..., Dn, Pause (2.0 sec. or 3.6 sec.), D1', D2', ..., Dn' (Pulse) (Tone ) 2. If the mode switch is set to tone mode, then the output signal will be: D1, D2, ..., Dn, *, D1', D2', ..., Dn' (Tone) (Tone) 3. The dialer remains in tone mode when the digits have been dialed out and can be reset to pulse mode only by going on-hook. 4. The pulse-to-tone function timing diagram is shown in Figure 6. Flash OFF HOOK (or ON HOOK & HFI o ), Fn 1. Fn = F1, ..., F4 2. The dialer will execute flash break time of 600 mS (F1), 100 mS (F2), 300 mS (F3), or 73 mS (F4) and all the pause time is 1.0 sec. before the next digit is dialed out. 3. Flash key can not be stored as a digit in memory. The flash key has the first priority among the keyboard functions. 4. The system will return to the initial state after the flash pause time is finished. 5. The flash function timing diagram is shown in Figure 7. HOLD OFF HOOK (or ON HOOK & HFI o ), H The hold function is switched on and off by a toggle switch. The keypad will be disabled when in hold mode. The function timing diagram is shown in Figure 3(a, b, c). ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATING UNIT VDD-VSS -0.3 to +7.0 V VIL VSS -0.3 V VIH VDD +0.3 V VOL VSS -0.3 V VOH VDD + 0.3 V PD 120 mW Operation Temperature TOPR -20 to +70 C Storage Temperature TSTG -55 to +150 C DC Supply Voltage Input/Output Voltage Power Dissipation Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device. -8- W91320N SERIES DC CHARACTERISTICS (VDD-VSS = 2.5V, FOSC. = 3.579545 MHz, TA = 25 C, All outputs unloaded) PARAMETER SYM. CONDITIONS MIN. TYP. MAX. UNIT Operating Voltage VDD - 2.0 - 5.5 V Operating Current IOP Tone, Unloaded - 0.4 0.6 mA Pulse, Unloaded - 0.2 0.4 Standby Current ISB HKS = VSS, No load & No key entry - - 15 A Memory Retention Current IMR HKS = VDD, VDD = 1.0V - - 0.2 A DTMF Output Voltage VTO Row group, 130 150 170 mVrm s 1 2 3 dB RL = 5 K Pre-emphasis Col/Row, VDD = 2.0 to 5.5V DTMF Distortion THD RL = 5 K, VDD = 2.0 to 5.5V - -30 -23 dB DTMF Output DC Level VTDC RL = 5 K, VDD = 2.0 to 5.5V 1.0 - 3.0 V DTMF Output Sink Current ITL VTO = 0.5V 0.2 - - mA DP Output Sink Current IPL VPO = 0.5V 0.5 - - mA T/P MUTE Output Sink Current ITML VTMO = 0.5V 0.5 - - mA H/P MUTE Output IHPH VHPL = 2.0V 0.5 - - mA Drive/Sink Current IHPL VHPL = 0.5V 0.5 - - mA HFO Drive/Sink Current IHFH VHFH = 2.0V 0.5 - - mA IHFL VHFL = 0.5V 0.5 - - mA Keypad Input Drive Current IKD VI = 0.0V 30 - - A Keypad Input Sink Current IKS VI = 2.5V 200 400 - A HKS I/P Pull-High Resistor RHK - - 300 - K Keypad Resistance RK - - - 5 K -9- Publication Release Date: May 1997 Revision A2 W91320N SERIES AC CHARACTERISTICS (VDD-VSS = 2.5V, FOSC. = 3.579545 MHz, TA = 25 C, All outputs unloaded) PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNIT Key-in Debounce TKID - - 20 - mS Key Release Debounce TKRD - - 20 - mS Off-hook Delay TOFD Lock only - 300 - mS First Key-in Delay TFKD Lock only - 300 - mS Pre-digit-pause1 TPDP1 Mode = VDD - 40 - mS 10 ppS Mode = Floating - 33.3 - TPDP2 Mode = VDD - 20 - 20 ppS Mode = Floating - 16.7 - 10 ppS - 800 - 20 ppS - 500 - Mode = VDD - 40:60 - Mode = Floating - 33.3:66.7 - Pre-digit-pause2 Interdigit Pause TIDP (Auto Dialing) Make/Break Ratio M:B mS mS % Tone Output Duration TTD Auto dialing - 93 - mS Intertone Pause TITP Auto dialing - 93 - mS TFB F1 - 600 - F2 - 100 - Flash Break Time F3 mS 300 F4 - 73 - Flash Pause Time TFP F1, F2, F3, F4 - 1.0 - S Pause Time TP R/P1 - 3.6 - S R/P2 - 2.0 - One-key Redial Break Time TRB - - 2.2 - S One-key Redial Pause Time TRP - - 600 - mS Notes: 1. Crystal parameters suggested for proper operation are Rs < 100 , Lm = 96 mH, Cm = 0.02 pF, Cn = 5 pF, Cl = 18 pF, FOSC. = 3.579545 MHz 0.02%. 2. Crystal oscillator accuracy directly affects these times. - 10 - W91320N SERIES TIMING WAVEFORMS HKS < 600 mS < 300 mS KEY IN 3 TKRD 4 2 2 TKID DP TKID TIDP MB TIDP MB TIDP TPDP TPDP TIDP T/P MUTE H/P MUTE Low DTMF OSCILLATION OSC. OSCILLATION Figure 1a. Normal Dialing Timing Diagram (Pulse Mode Without Lock Function) < 600 mS HKS < 300 mS KEY IN 3 TKRD 4 2 2 TKID TKID DP TOFD MB TIDP MB TIDP TIDP TPDP TPDP T/P MUTE TFKD H/P MUTE Low DTMF OSC. OSCILLATION OSCILLATION Figure 1b. Normal Dialing Timing Diagram (Pulse Mode with Lock Function) - 11 - Publication Release Date: May 1997 Revision A2 W91320N SERIES Timing Waveforms, continued < 600 mS HKS TKRD R/P KEY IN TKID DP MB TIDP MB TIDP TIDP TPDP T/P MUTE H/P MUTE Low DTMF OSC. OSCILLATION Figure 1c. Auto Dialing Timing Diagram (Pulse Mode Without Lock Function) < 600 mS HKS KEY IN 300 mS R/P TKID DP TOFD MB TIDP MB TIDP TPDP T/P MUTE TFKD H/P MUTE Low DTMF OSC. OSCILLATION Figure 1d. Auto Dialing Timing Diagram (Pulse Mode with Lock Function) - 12 - TIDP W91320N SERIES Timing Waveforms, continued < 600 mS HKS < 300 mS 3 KEY IN TKRD 4 TKRD 5 2 2 TKID TKID DTMF TTD TITP TITP TITP TITP T/P MUTE Low H/P MUTE DP High OSC. OSCILLATION OSCILLATION OSCILLATION Figure 2a. Normal Dialing Timing Diagram (Tone Mode Without Lock Function) < 600 mS HKS < 300 mS KEY IN 3 TKRD 4 2 2 5 TKID DTMF TTD TITP TITP TITP T/P MUTE TFKD H/P MUTE Low TOFD DP OSC. OSCILLATION OSCILLATION Figure 2b. Normal Dialing Timing Diagram (Tone Mode with Lock Function) - 13 - Publication Release Date: May 1997 Revision A2 W91320N SERIES Timing Waveforms, continued < 600 mS HKS TKRD R/P KEY IN TKID DTMF TTD TITP TITP T/P MUTE Low H/P MUTE DP OSC. OSCILLATION Figure 2c. Auto Dialing Timing Diagram (Tone Mode Without Lock Function) < 600 mS HKS TKRD R/P KEY IN DTMF TTD TITP TITP T/P MUTE 300 mS DP OSC. TFKD Low H/P MUTE TOFD OSCILLATION Figure 2d. Auto Dialing Timing Diagram (Tone Mode with Lock Function) - 14 - W91320N SERIES Timing Waveforms, continued HKS ON HOOK OFF HOOK HFI H KEY HFO T/P MUTE High H/P MUTE Low CHIP ENBLE Figure 3a. Handfree and Hold Timing Diagram Note: The H KEY cannot be enabled when chip is disabled. HKS OFF HOOK HFI H KEY HFO T/P MUTE High H/P MUTE CHIP ENBLE Figure 3b. Handfree and Hold Timing Diagram Note: The HFI and H KEY inputs will toggle the HFO signal; as soon as either HFI or H KEY is activated, the HFO signal will go high and previous activate inputs will be ignored. - 15 - Publication Release Date: May 1997 Revision A2 W91320N SERIES Timing Waveforms, continued HKS ON HOOK HFI H KEY HFO High T/P MUTE H/P MUTE CHIP ENBLE Figure 3c. Handfree and Hold Timing Diagram Note: Changing the state of the HKS signal from high to low will initialize the HFO and H/P MUTE signals. HKS KEY IN < 600 mS R R 300 mS TKID DP TKID TOFD TFKD TIDP TRB MB TRP TPDP TIDP MB TPDP HFI HFO T/P MUTE H/P MUTE DTMF OSC. Low OSCILLATION Figure 4. One-key Redial Timing Diagram (Pulse Mode) - 16 - W91320N SERIES Timing Waveforms, continued < 600 mS HKS KEY IN 300 mS 2 R/P 3 TKID TOFD DP TIDP MB MB TPDP TPDP TP T/P MUTE H/P MUTE TFKD DTMF OSC. Low OSCILLATION OSCILLATION Figure 5. Pause Function Timing Diagram < 600 mS HKS KEY IN 300 mS TOFD DP 2 TKID */T 3 MB TPDP TP T/P MUTE TIDP H/P MUTE DTMF OSC. OSCILLATION OSCILLATION Figure 6. Pulse-to-tone Timing Diagram - 17 - Publication Release Date: May 1997 Revision A2 W91320N SERIES Timing Waveforms, continued Low HKS KEY IN F F F 3 TKID T FP DP T FB TKID T KID HFI T FB HFO T/P MUTE H/P MUTE DTMF TITP OSC. OSCILLATION Figure 7. Flash Timing Diagram - 18 - W91320N SERIES Headquarters Winbond Electronics (H.K.) Ltd. No. 4, Creation Rd. III, Science-Based Industrial Park, Hsinchu, Taiwan TEL: 886-3-5770066 FAX: 886-3-5792697 http://www.winbond.com.tw/ Voice & Fax-on-demand: 886-2-7197006 Rm. 803, World Trade Square, Tower II, 123 Hoi Bun Rd., Kwun Tong, Kowloon, Hong Kong TEL: 852-27516023 FAX: 852-27552064 Winbond Electronics North America Corp. Winbond Memory Lab. Winbond Microelectronics Corp. Winbond Systems Lab. 2730 Orchard Parkway, San Jose, CA 95134, U.S.A. TEL: 1-408-9436666 FAX: 1-408-9436668 Taipei Office 11F, No. 115, Sec. 3, Min-Sheng East Rd., Taipei, Taiwan TEL: 886-2-7190505 FAX: 886-2-7197502 Note: All data and specifications are subject to change without notice. - 19 - Publication Release Date: May 1997 Revision A2