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w91640 series 5-memory tone/pulse switchable dialer publication release date: july 1996 - 1 - revision a1 general description the w91640 series are si-gate cmos ic tone/pulse switchable dialers that include a 16-digit 5 one-touch memory and a 32-digit save or mercury memory. the dialers also provide key, flash, handfree, and redial functions. features tone/ pulse switchable dialer 32-digit redial memory 32-digit save or mercury memory 16-digit 5 one-touch repertory memory mixed dialing, cascade dialing allowed use 5 5 keyboard mute key for control flash time: 98 ms flash pause time: 1.2 sec. pause time: 2.5 sec. minimum tone output duration: 93 msec. minimum intertone pause: 93 msec. pause, */t (pulse-to-tone), flash can be stored as a digit in memory on-chip power-on reset uses 3.579545 mhz crystal or ceramic resonator packaged in 22-pin plastic dip the different dialers in the w91640 series are described in the following table: type no. pulse ( pp s) pause (s) b:m flash ( m s) mercury memory w91640 10 2.5 2:1 98 save w91641 10 2.5 3:2 98 save w91640b 10 2.5 2:1 98 yes W91641B 10 2.5 3:2 98 yes
w91640 series - 2 - pin configuration 20 21 22 1 2 3 4 5 6 7 16 17 18 19 13 14 15 8 9 10 ss c3 v dd v c4 xt xt t/p mute r5 r4 dtmf dp hks r3 r2 c1 c2 mode 12 11 hfi hfo k mute r1 c5 pin description symbol pin i/o function column-row inputs 1 - 5 & 18 - 22 i the keyboard input may be used with either the standard 5 5 keyboard or the inexpensive single contact (form a) keyboard. electronic input from a m c can also be used. a valid key entry is defined by a single row being connected to a single column. xt, xt 8, 9 i, o a built-in inverter provides oscillation with an inexpensive 3.579545 mhz crystal or ceramic resonator. t/p mute 10 o the t/p mute is a conventional cmos n-channel open drain output. the output transistor is switched on during pulse and tone mode dialing sequence and flash break. otherwise, it is switched off. mode 16 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 (10 pps, m/b = 1:2 or 2:3). hks 13 i hook switch input. hks = 1: on-hook state. chip in sleeping mode, no operation. hks = 0: off- hook state. chip enabled for normal operation. hks pin is pulled to v dd by internal resistor.
w91640 series publication release date: july 1996 - 3 - revision a1 pin description, continued symbol pin i/o function dp 14 o n-channel open drain dialing pulse output (figure 1). flash key causes dp to be active in pulse mode. dtmf 15 o in pulse mode, remains in low state at all times. in tone mode, sends a dual or single tone. 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 v dd , v ss 17, 7 i power input pins. hfi , hfo 11, 12 i, o handfree control pins. a low pulse on the hfi input pin toggles the handfree control state. the relationships between the handfree control states are listed in the following table: current state next state input hfo dialing high yes on hook high hfi low no off hook high hfi low yes on hook - off hook low yes off hook low on hook low no off hook high on hook high yes - low hfi hook sw. hfo hfi pin is pulled to v dd by an internal resistor. k mute 6 o k mute is an nmos open drain output. k mute is active low when the mute key is pressed after off hook or when hfo is in high state. the k mute state is toggled by the mute key.
w91640 series - 4 - functional description keyboard operation c1 c2 c3 c4 c5 1 2 3 s m1 r1 4 5 6 m2 r2 7 8 9 m3 r3 * /t 0 # mer m4 r4 f p mute r m5 r5 note: mer is for the w91640b/641b only. the other type numbers (w91640/641) provide a save function instead. s: memory store function key f: flash key with 98 ms break time and 1.2 sec pause time r: redial function key p: pause function key mn (n = 1 to 5): one-touch direct memory * /t: pulse-to-tone switch function key in pulse mode, * key in tone mode save: one-touch memory for save dialing save dialing can be executed after off-hook or handfree dialing is activated. mer: one-touch memory for mercury code dialing mute: secrecy control key once the mute key is pressed, the k mute output will be toggled. note: dn = 0 to 9, * /t, #, mn = m1 to m5, n = 1 to 5. 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 the redial is inhibited if length oversteps 32 digits. redialing 1. redialing is valid any time after off-hook or handfree dialing is activated. 2. the redial function timing diagram is shown in figure 1.
w91640 series publication release date: july 1996 - 5 - revision a1 off hook , d1 , d2 , ..., dn , busy, come on hook , off hook , (or on hook & hfi ?? ) r or on hook & hfi ?? , d1 , d2 , ..., dn busy, hfi ?? , come hfi ?? , r d1, d2, ..., dn will be dialed out. number store 1. off hook (or on hook & hfi ?? ) s , mn (or save ) d1 , d2 , ..., dn , s a. d1, d2, ..., dn wil l be stored in memory mn (or save) location but will not be dialed out. b. p , f , and */t keys can be stored as a digit in memory. the store mode is released after the store function is executed or the state of the hook switch is changed. 2. off hook (or on hook & hfi ?? ) s , mn (or save ), r , s a. redial buffer is transferred to mn (or save memory). b. if content of redial buffer exceeds 16 digits, the content is not transferred to mn. 3. off hook (or on hook & hfi ?? ) s , mn , save , s save memory is transferred to mn. 4. off hook , d1 , d2 , ..., dn , save d1, d2, ? , dn will be stored to save memory. mercury store off hook (or on hook & hfi ?? ) s , mer , d1 , d2 , ..., dn , s d1, d2, ..., dn will be stored in mercury memory but will not be dialed out. memory clear 1. off hook (or on hook & hfi ?? ), s , mn (or save ), s mn (or save) will be cleared. 2. off hook (or on hook & hfi ?? ), s , mn (or save ), s
w91640 series - 6 - the mn (or save) will be cleared . repertory dialing 1. off hook (or on hook & hfi ?? ), mn (or save or r ) mn (or save) will be dialing out. mn = d1, d2, */t, d3, d4 2. off hook , mn a. d1, d2, p ? t, d3, d4 will be dialed out. b. red ial register is changed to d1, d2, p ? t, d3, d4. access pause off hook (or on hook & hfi ?? ), d1 , d2 , p , d3 , ..., dn 1. the pause function can be stored in memory. 2. the pause function is executed in normal dialing, redialing, or memory dialing. 3. the pause function timing diagram is shown in figure 3. 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: d1, d2, ? , dn, pause (2.5s), 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) (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 */t function timing diagram is shown in figure 4. flash key off hook (or on hook & hfi ?? ), f 1. flash key can be stored as a digit in memory. 2. the flash key function timing diagram is shown in figure 5.
w91640 series publication release date: july 1996 - 7 - revision a1 mute key off hook (or on hook & hfi ?? ), d1 , d2 , ..., dn , on line, mute , d1' , d2' , ..., dn' , on line, mute 1. the k mute output will go low while first mute key is pressed. 2. the operation timing diagram is shown in figure 6(a, b). cascade dialing cascade dialing 1. definition of cascade dialing: the next sequence may be pressed before the former sequence is sent out completely. examples of cascade dialing are shown below: example 1: normal dialing + repertory dialing 1 + repertory dialing 2 + ... example 2: repertory dialing 1 + normal dialing + repertory dialing 2 + ... example 3: redialing + normal dialing + repertory dialing 2 + ... 2. normal dialing, redialing, or repertory dialing as depicted above is treated as one sequence. 3. a most 32 digits are allowed in cascade dialing, with no limitation on the number of sequences. 4. the content of cascade dialing can be a combination of normal dialing, redialing, repertory dialing. 5. on hook , off hook , r : all the cascade-dialing sequences described in the above examples will be dialed out only if there are not more than 32 digits. if the sequence exceeds 32 digits then redialing is inhibited. (the r key can be used any time after off-hook or handfree activity.) mixed dialing 1. definition of mixed dialing: in the examples above, if each sequence is dialed only after the preceding sequence is dialed out completely, then this is mixed dialing. 2. there is no limitation on the number of digits and sequences in mixed dialing. 3. the content of mixed dialing can be a combination of normal dialing, redialing, and repertory dialing .
w91640 series - 8 - 4. on hook , off hook , r : all the mixed dialing sequences described in the above examples will be dialed out only if there are not more than 32 digits. if the sequence exceeds 32 digits then the redialing is inhibited. combination(s) of cascade and mixed dialing 1. cascade dialing and mixed dialing can be combined, and each follows the rules described above. 2. to apply redial to a combination of cascade and mixed dialing: on hook , off hook , r . redialing will be executed only if the total number of digits does not exceed 32 digits. if it exceeds 32 digits, then redialing is inhibited. 3. if n cascaded sequences have been dialed, with a total of 30 digits, then for the (n+1)th cascade sequence, you can dial one 2-digit normal dialing sequence or one complete repertory dialing number (length up to 32 digits). the (n+2)th sequence is not accepted for cascade dialing. 4. after an a total of 32 digit of cascaded mixed dialing is completed, mixed dialing can be added. mercury dialing 1. up to 32 digits may be stored. 2. mercury dialing is active only as the first key-in after off-hook or handfree dialing is activated. 3. the timing diagram for the mercury memory function is given below. key in dp t/p mute dtmf osc. oscillation mer
w91640 series publication release date: july 1996 - 9 - revision a1 absolute maximum ratings parameter symbol rating unit dc supply voltage v dd - v ss -0.3 to +7.0 v input/output voltage v il v ss -0.3 v 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 operating temperature t opr -20 to 70 c storage temprature t stg -55 to 125 c note: exposure to conditions beyond those listed under absolute maximum ratings may adversely affect the life and reliability of the device. dc characteristics (v dd - v ss = 2.5v, fosc. = 3.58 mhz, ta = 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 mode - 0.5 1.0 ma pulse mode - 0.3 0.5 standby current i sb hks = 0, no load and no key entry - - 15 m a memory retention current i mr hks = 1, v dd = 1.0v - - 0.2 m a dtmf output voltage v to row group, r l = 5 k w 130 150 170 vrms pre-emphasis col/row, v dd = 2.0 to 5.5v 1 2 3 db 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 sink current i tl v to = 0.5v 0.2 - - ma dp sink current i pl v po = 0.5v 0.5 - - ma k mute , t/p mute output sink current i ml v mo = 0.5v 0.5 - - ma hks i/p pull high resistor r kh - 500 - k w
w91640 series - 10 - dc characteristics, continued parameter symbol conditions min. typ. max. unit hfo drive current i hfh v hfh = 2.0v 0.5 - - ma hfo sink current i hfl v hfl = 0.5v 0.5 - - ma keypad drive current i kd v i = 0v 30 - - m a keypad sink current i ks v i = 2.5v 200 400 - m a keypad resistance - - 5.0 k w ac characteristics parameter symbol conditions min. typ. max. unit keypad active in debounce t kid - 20 - ms key release debounce t krd - 20 - ms pre-digit pause t pdp m/b = 1/2 - 33.3 - ms m/b = 2/3 - 40 - ms interdigit pause (auto dialing) t idp 10 pps - 800 - ms make/break ratio m/b m/b = 1/2 - 33:67 - % m/b = 2/3 - 40:60 - % tone output duration t td auto dialing - 93 - ms intertone pause t itp auto dialing - 93 - ms flash break time t fb - 98 - ms flash pause time t fp - 1.2 - s pause time t p - 2.5 - 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, f osc. = 3.579545 mhz 0.02%. 2. crystal oscillator accuracy directly affects these times.
w91640 series publication release date: july 1996 - 11 - revision a1 timing waveforms hks key in dp t kid m b 4 2 t t idp pdp m t t krd krd b t idp m b t t idp pdp m t t krd r b t idp high t/p mute k mute osc. dtmf oscillation low oscillation figure 1. pulse mode timing diagram hks key in dtmf t kid t td t itp t krd t itp t kid t krd t itp high t/p mute k mute osc. dp oscillation high oscillation figure 2(a). tone mode normal dialing timing diagram
w91640 series - 12 - timing waveforms, continued hks key in dtmf t kid t td t itp t itp high t/p mute k mute osc. dp oscillation high figure 2(b). tone mode auto dialing timing diagram hks key in dp t kid m b 4 t t idp pdp m 6 b 2 p t idp m t t idp b pdp t p high t/p mute k mute osc. dtmf oscillation low figure 3. pause function timing diagram
w91640 series publication release date: july 1996 - 13 - revision a1 timing waveforms, continued hks key in dp t kid m b 4 2 t t idp pdp m b */t 8 t idp t p high t/p mute k mute osc. dtmf oscillation t itp figure 4. pulse-to-tone operation timing diagram low hks key in dp f t kid 4 kid t 2 t idp t idp t pdp t fp t pdp high t fb t/p mute k mute osc. dtmf oscillation low figure 5. flash operation timing diagram
w91640 series - 14 - timing waveforms, continued low hks key in dp kid t 4 t idp 2 t idp mute 3 kid t mute t idp t pdp t pdp t pdp t/p mute k mute osc. dtmf oscillation oscillation figure 6(a). mute key timing diagram hks key in hfi mute 2 mute mute mute k mute hfo dp t/p mute t kid t t pdp idp osc. osc. osc. low osc. osc. osc. dtmf figure 6(b). mute key operation with hfi /hfo timing diagram (ia5264001 only)
w91640 series publication release date: july 1996 - 15 - revision a1 timing waveforms, continued on hook hks hfi hfo high high t/p mute k mute ce figure 7. handfree reset by hks falling edge
w91640 series - 16 - headquarters 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 taipei office 11f, no. 115, sec. 3, min-sheng east rd., taipei, taiwan tel: 886-2-7190505 fax: 886-2-7197502 winbond electronics (h.k.) ltd. 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 note: all data and specifications are subject to change without notice.

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