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w91340n series 10-memory tone/pulse dialer with handfree and hold functions publication release date: may 1997 - 1 - revision a2 general description the w91340n series are tone/pluse switchable telephone dialers with ten memories, hold function, and a handfree dialing control circuit. fabricated using cmos technology, the w91340n series offer good performance in low-voltage and low-power applications. features dtmf/pulse switchable dialer 32-digit redial memory ten by 16-digit two-touch direct repertory memory cascaded dialing allowed, with unlimited dialing length pulse-to-tone (*/t) keypad for long distance call operation uses 5 4 keyboard easy operation with redial, flash, pause, and */t keypads pause, p ? t (pulse-to-tone) can be stored as a digit in memory dialing rate (10 pps or 20 pps) is selectable by bonding option on-hook debounce time: 150 msec. minimum tone output duration: 93 msec. (w91344an: 87 ms) minimum intertone pause: 93 msec. (w91344an: 87 ms) flash break time (73, 100, 300, 600 msec) selectable by keypad; pause time is 1.0 sec. make/break ratio (40:60 or 33.3:66.7) selectable by mode pin on-chip power-on reset uses 3.579545 mhz crystal or ceramic resonator packaged in 18 or 20-pin plastic dip the different dialers in the w91340n series are shown in the following table: type no. replacement type no. pulse (pps) flash (ms) m/b handfree dialing package (pins) w91340n w91340 10 600/300/73/100 pin - 18 w91341 w91342n w91342 20 600/300/73/100 pin - 18 w91340an w91340a 10 600/300/73/100 pin yes 20 w91341a w91342an w91342a 20 600/300/73/100 pin yes 20 w91344an new type 10 600/300/73/100 pin yes 20 note: the w91344an is designed specifically for use in france. the pause time is not added in pulse-to-tone mode.
w91340n series - 2 - pin configurations c1 c2 c3 c4 ss v xt xt 1 2 3 4 5 6 7 8 9 t/p mute 10 hfi hks dtmf mode r4 r3 r2 r1 v dd 13 18 20 19 17 16 15 14 12 11 hfo c1 c2 c3 c4 ss v xt xt 1 2 3 4 5 6 7 8 9 t/p mute hks dtmf mode r4 r3 r2 r1 v dd 12 18 17 16 15 14 10 11 13 h/p mute dp dp h/p mute w91340n/342n w91340an/342an/344an pin description symbol 18-pin 20-pin i/o function column- row inputs 1 - 4 & 15 - 18 1 - 4 & 17 - 20 i the keyboard inputs may be used with either a standard 5 4 keyboard or an inexpensive single contact (form a) keyboard. electronic input from a m c can also be used. a valid key is defined as a single row being connected to a single column. xt, xt 7, 8 7, 8 i, o a built-in inverter provides oscillation with an inexpensive 3.579545 mhz crystal or ceramic resonator. t/p mute 99o the t/p mute is a conventional cmos n-channel open drain output. the output transistor is switched on during dialing sequence and flash break time. otherwise, it is switched off. mode 13 15 i pulling mode pin to v ss places the dialer in tone mode. pulling mode pin to v dd places the dialer in pulse mode with m/b ratio of 40:60 (10 pps, except for w91342n/w91342an = 20 pps.) floating mode pin places the dialer in pulse mode with m/b ratio of 33.3:66.7 (10 pps, except for w91342n/w91342an = 20 pps.) hks 10 12 i hook switch input. hks = v dd : on-hook state. chip in sleeping mode, no operation. hks = v ss : off-hook state. chip is enabled for normal operation. hks pin is pulled to v dd by an internal resistor.
w91340n series publication release date: may 1997 - 3 - revision a2 pin description, continued symbol 18-pin 20-pin i/o function dp 11 13 o n-channel open drain dialing pulse output. flash key will cause dp to be active in either tone mode or pulse mode. the timing diagram for pulse mode is shown in figure 1(a, b, c). v dd , v ss 14, 6 16, 6 i power input pins. dtmf 12 14 o in pulse mode, this pin remains in low state at all times. in the tone mode, it will output a dual or single tone. detailed timing diagram for tone mode is shown in figure 2(a, b, c). specified actual error % output frequency r1 r2 r3 r4 c1 c2 c3 697 770 852 941 1209 1336 1477 699 766 848 948 1216 1332 1472 +0.28 -0.52 -0.47 +0.74 +0.57 -0.30 -0.34 hfi, hfo - 10, 11 i, o 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: current state input hfo dialing high yes on hook high low no off hook high low yes on hook off hook low yes off hook low on hook low no off hook high on hook high yes low hook sw. hfo next state hfi hfi hfi hfi pin is pulled to v dd by an internal resistor. detailed timing diagram is shown in figure 3. h/p mute 5 5 o the h/p mute is a conventional inverter output. during pulse dialing, flash break or hold period, this output is active high; otherwise, it remains in low state.
w91340n series - 4 - block diagram row column dtmf xt xt mode ram counter system clock generator location latch d/a row & column programmable counter data latch & decoder read / write (r1 to r4, vx) (c1 to c4) t/p mute hfo control logic pulse control logic keyboard interface converter hks hfi dp h/p mute functional description keyboard operation c1 c2 c3 c4 123sr1 456f4r2 789ar3 * /t 0 # r/p r4 f1 f2 f3 h v x s: store function key h: hold function key a: indirect repertory memory dialing function key r/p: redial and pause function key * /t: * in tone mode and p ? t in pulse mode f1, ? , f4: flash keys, f1 = 600 ms, f2 = 300 ms, f3 = 73 ms, f4 = 100 ms notes: d1, ..., dn, d1', ..., dn': 0, ..., 9, */t, # ln: 0, ..., 9 ; fn: f1, ..., f4
w91340n series publication release date: may 1997 - 5 - revision a2 normal dialing off hook , (or on hook & hfi ?? ), d1 , d2 , ..., dn 1. d1, d2, ..., dn will be dialed out. 2. dialing length is unlimited, but redial is inhibited if length exceeds 32 digits in normal dialing. redialing off hook , (or on hook & hfi ?? ), d1 , d2 , ..., dn busy, come on hook , off hook , (or on hook & hfi ?? ), r/p 1. the redial memory content will be dialed out. 2. the r/p key can execute the redial function only as the first key-in after off-hook; otherwise, it executes pause function. number store off hook , (or on hook & hfi ?? ), d1 , d2 , ..., dn , s , s , ln 1. if the sequence of the dialed digits d1, d2, ..., dn has not finished, s will be ignored. 2. d1, d2, ..., dn will be dialed out and stored in memory location. off hook , (or on hook & hfi ?? ), s , d1 , d2 , ..., dn , s , ln 3. d1, d2, ..., dn will be stored in memory location but will not be dialed out. 4. r/p and */t keys can be stored as a digit in memory. in store mode, r/p is the pause function key. 5. the store mode is released after the store function is executed or when the state of the hook switch is changed. repertory dialing off hook , (or on hook & hfi ?? ), a, ln access pause off hook , (or on hook & hfi ?? ), d1 , d2 , r/p , d3 , ..., dn 1. the pause function can be stored as a digit in memory. 2. the pause function is executed in normal dialing, redial dialing, or memory dialing. 3. the detailed timing diagram for the pause function is shown in figure 4.
w91340n series - 6 - pulse-to-tone (*/t) off hook , (or on hook & hfi ?? ), d1 , d2 , ..., dn , */t , d1' , d2' , ..., dn' 1. if the mode switch is set to pulse mode, then the output signal will be as follows: all versions except w91344an: d1, d2, ..., dn, pause (3.6 sec.), d1', d2', ..., dn' (pulse) (tone ) w91344an: d1, d2, ..., dn, *, d1', d2', ..., dn' (pulse) (tone) (tone) 2. if the mode switch is set to tone mode, then the output signal will be as follows: 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 5(a, b). flash off hook , (or on hook & hfi ?? ), fn 1. fn = f1, ..., f4 2. the dialer will execute a flash break time of 600 ms (f1), 300 ms (f2), 73 ms (f3), or 100 ms (f4). in each case the flash pause time is 1.0 sec. before the next digit is dialed out. 3. flash key cannot be stored as a digit in memory, and it has first priority among 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 6. cascaded dialing 1. normal dialing + repertory dialing + normal dialing 2. repertory dialing + normal dialing + repertory dialing 3. redialing + normal dialing + repertory dialing redialing is valid as first key-in only.
w91340n series publication release date: may 1997 - 7 - revision a2 absolute maximum ratings parameter symbol rating unit dc supply voltage v dd - v ss -0.3 to +7.0 v v il v ss -0.3 v input/output voltage v ih v dd +0.3 v v ol v ss -0.3 v v oh v dd +0.3 v power dissipation p d 120 mw operation temperature t opr -20 to +70 c storage temperature t stg -55 to +150 c note: exposure to conditions beyond those listed under absolute maximum ratings may adversely affect the life and reliability o f the device. dc characteristics (v dd - v ss = 2.5v, f osc. = 3.579545 mhz, t a = 25 c, all outputs unloaded) parameter symbol conditions min. typ. max. unit operating voltage v dd - 2.0 - 5.5 v operating current i op tone, unloaded - 0.4 0.6 ma pulse, unloaded - 0.2 0.4 standby current i sb hks = v ss , no load & no key entry --15 m a memory retention current i mr hks = v dd , v dd = 1.0v - - 0.2 m a dtmf output voltage v to row group, r l = 5 k w 130 150 170 mvrms pre-emphasis - col/row, v dd = 2.0 to 5.5v 123db dtmf distortion thd r l = 5 k w , v dd = 2.0 to 5.5v - -30 -23 db dtmf output dc level v tdc r l = 5 k w , v dd = 2.0 to 5.5v 1.0 - 3.0 v dtmf output sink current i tl v to = 0.5v 0.2 - - ma dp output sink current i pl v po = 0.5v 0.5 - - ma t/p mute output sink current i ml v mo = 0.5v 0.5 - - ma
w91340n series - 8 - dc characteristics, continued parameter symbol conditions min. typ. max. unit h/p mute output i hph v hph = 2.0v 0.5 - - ma drive/sink current i hpl v hpl = 0.5v 0.5 - - ma hfo drive/sink current i hfh v hfh = 2.0v 0.5 - - ma i hfl v hfl = 0.5v 0.5 - - ma keypad input drive current i kd v i = 0.0v 30 - - m a keypad input sink current i ks v i = 2.5v 200 400 - m a hks i/p pull-high resistor r hk - - 300 - k w keypad resistance r k - - - 5.0 k w ac characteristics (v dd - v ss = 2.5v, f osc. = 3.579545 mhz, t a = 25 c, all outputs unloaded) parameter symbol conditions min. typ. max. unit key-in debounce t kid --20-ms key release debounce t krd --20-ms on-hook debounce t ohd - - 150 - ms pre-digit pause 1 t pdp1 mode = v dd -40 -ms 10 pps mode = floating - 33.3 - pre-digit pause 2 t pdp2 mode = v dd -20 -ms 20 pps mode = floating - 16.7 - interdigit pause t idp 10 pps - 800 - ms (auto dialing) 20 pps - 500 - make/break ratio m/b mode = v dd - 40:60 - % mode = floating - 33.3:66.7 - tone output duration t td auto dialing - 93 - ms w91344an only - 87 - intertone pause t itp auto dialing - 93 - ms w91344an only - 87 - f1 - 600 - flash break time t fb f2 - 300 - ms f3 73 f4 - 100 - flash pause time t fp f1, f2, f3, f4 - 1.0 - s pause time t p r/p - 3.6 - s notes: 1. crystal parameters suggested for proper operation are rs<100 w , 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.
w91340n series publication release date: may 1997 - 9 - revision a2 timing waveforms t idp hks key in dp h/p mute t/p mute 2 b m t idp t idp t kid t idp t pdp 2 m b 4 t krd 3 t kid dtmf osc. low oscillation oscillation t pdp figure 1(a). normal dialing timing diagram hks key in dp t/p mute r/p t kid b m t idp t idp t pdp mb dtmf osc. low oscillation t idp t krd h/p mute t < t ohd figure 1(b) pulse mode auto dialing timing diagram
w91340n series - 10 - timing waveforms, continued hks key in dp t/p mute r/p t kid b m t idp t pdp mb dtmf osc. low oscillation t krd t> t ohd h/p mute figure 1(c) pulse mode auto dialing timing diagram hks key in t/p mute dtmf 5 4 3 t td osc. dp oscillation 2 t itp t itp t kid high t itp oscillation t krd h/p mute low figure 2(a) tone mode normal dialing timing diagram
w91340n series publication release date: may 1997 - 11 - revision a2 timing waveforms, continued r/p t krd oscillation t td t itp t itp t kid high t< t ohd hks key in t/p mute dtmf osc. dp h/p mute low figure 2(b) tone mode auto dialing timing diagram r/p t krd oscillation t td t itp t kid high t > t ohd hks key in t/p mute dtmf osc. dp h/p mute low figure 2(c) tone mode auto dialing timing diagram
w91340n series - 12 - timing waveforms, continued 12 hks key in h mode dp dtmf hh h h mute h/p mute hfi hfo osc t/p figure 3. handfree function timing diagram osc. low oscillation 2 t kid r/p 3 b m t pdp m t idp b t pdp t p hks key in t/p mute dtmf dp h/p mute figure 4. pause function timing diagram
w91340n series publication release date: may 1997 - 13 - revision a2 timing waveforms, continued hks key in dp h/p mute dtmf osc. oscillation 2 t kid */t 3 b m t pdp t idp t p t itp t/p mute figure 5(a). pulse-to-tone timing diagram (all versions except w91344an) hks key in dp h/p mute */t b m t idp t pdp t kid 2 4 t kid t krd dtmf osc. oscillation oscillation t itp itp t t/p mute figure 5(b). pulse-to-tone timing diagram (w91344an only)
w91340n series - 14 - timing waveforms, continued h/p mute f f hks t kid dtmf osc. dp key in low 3 t fb f t kid t kid t itp oscillation hfi hfo t fb t fp t/p mute t fp figure 6. flash timing diagram
w91340n series publication release date: may 1997 - 15 - revision a2 headquarters no. 4, creation rd. iii, science-based industrial park, hsinchu, taiwan tel: 886-3-5770066 fax: 886-3-5792766 http://www.winbond.com.tw/ voice & fax-on-demand: 886-2-27197006 taipei office 11f, no. 115, sec. 3, min-sheng east rd., taipei, taiwan tel: 886-2-27190505 fax: 886-2-27197502 winbond electronics (h.k.) ltd. rm. 803, world trade square, tower ii, 123 hoi bun rd., kwun tong, kowloon, hong kong tel: 852-27513100 fax: 852-27552064 winbond electronics north america corp. winbond memory lab. winbond microelectronics corp. winbond systems lab. 2727 n. first street, san jose, ca 95134, u.s.a. tel: 408-9436666 fax: 408-5441798 note: all data and specifications are subject to change without notice.

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