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nt91315xl series preliminary microcontroller for monitor 1 features n tone/pulse switchable n 32-digit redial memory n 32-digit save memory (dl version) n 3 emergency memory banks (16 digits each) n 10 indirect memory banks (16 digits each) n flash, pause, p ? t can be saved as a digit in memory n chain dialing al lowed n none or (0) or (0, 9) or (0, 168) or all digits dialing inhibition (diode option) for pabx system or long distance dialing lock out n pause time 2.2/3.6 sec selectable (diode option) n 3 pulse dialing number systems n/n+1/10-n (diode option) n d ialing rate 10pps, m/b ratio 2/3 & 1/2 selectable/dialing rate 10pps & 20pps selectable, m/b ratio 1/2 (diode option) n hands-free control function with debouncing (bl, cl & dl version) n hold function with debouncing (cl & dl version) n key-tone outpu t for dialing access (dl version) n one-key redial (dl version) n flash time 600ms, 300ms, 100ms (dl version) n power-up reset circuit provided n key release debouncing n 32-step synthetic tone output for low dtmf output harmonic distortion n 16/18/20/22- pin packages general description the nt91315xl series are single-chip silicon gate cmos integrated circuits with on-chip oscillators to be used with a 3.58 mhz crystal or ceramic resonator. they provide dialing pulse (dp) or dual tone multi-frequency (dtmf) dialing. a 24-key (5x5-1) matrix keyboard is used for either dp or dtmf mode. in on-chip ram, up to 32 digits can be saved for both redial and save functions, and up to 16 digits can be saved for 3 direct emergency and 10 indirect dialing memory banks. in dtmf mode, a small minimum tone duration and minimum inter-tone pause allows for rapid dialing. maximum tone duration depends on the key depression time in manual dialing. pin configurations a. NT91315AL b. nt91315bl c. nt91315cl d. nt91315dl
nt91315xl series 2 keyboard assignments c1 c2 c3 gnd c4 r1 1 2 3 st rd r2 4 5 6 a/l p r3 7 8 9 f1 f2 r4 */t 0 # rd/p f3 m1 m2 m3 save flash time, f1: 600ms( default ), f2: 300ms, f3: 100ms diode options (switch closed): d1. lock 0 d2. pause time 2.2sec d3. flash time 300ms for f1 d4. lock 0, 9 d5. pulse dialing 10-n d6. pulse dialing n+1 d7. lock 0, 168 d8. flash time 100ms for f1 d9. dialing rate 10pps & 20pps selectable, m/b ratio 1/2 d10. lock all digits row1 col1 sw11 d1 in4148 col2 sw12 d2 in4148 col3 sw13 d3 in4148 row2 sw14 d4 in4148 sw15 d5 in4148 sw16 row3 sw17 d7 in4148 sw18 sw19 d9 in4148 d8 in4148 row4 sw20 d10 in4148 d6 in4148 vdd d
nt91315xl series 3 block diagram dialing buffer save memory redial buffer memories keyboard decoder dialing logic control logic inputs dtmf generator timing generator r1 r4 c1 c4 : : mode in hfi hk hdi kt hfo hdo osoo osci tone xumte dp
nt91315xl series 4 absolute maximum ratings* supply voltage (v dd ) . . . . . . . . . . . . . .-0.3v to +6.0v input voltage (v in ) . . . . . .. . . . v ss - 0.3v to v dd + 0.3v output voltage (v out ) . . . . . . .v ss - 0.3v to v dd + 0.3v output voltage (v out )( dp , xmute ) . . . . . . . . .<1.2v tone output current (i tone ) . . . . . . . . . . . . . . <50 ma power dissipation (p d ) . . . . . . . . . . . . . . . . . <500 mw operating temperature (t op ) . . . . . . . .-20 c to +70 c storage temperature (tstg) . . . . . . . . .-40 c to +125 c * comments stresses above those listed under "absolute maximum ratings" may cause permanent damage to the device. these are stress ratings only. functional operation of this device at these or any other conditions above those indicated in the operational sections of this specification is not implied and exposure to absolute maximum rating conditions for extended periods may affect device reliability. dc electrical characteristics (v dd = 2.5v, v ss = 0v, fosc = 3.579mhz, top = 25 c, unless otherwise specified.) parameter symbol min. typ. max. unit conditions test ckt. operating voltage v dd 2.0 5.5 v pulse mode a 2.0 5.5 tone mode memory retention voltage v mr 0.8 v - memory retention current i mr 0.5 m a v dd = 1.0v, hk = v dd all outputs unloaded - operating current i ddp 1.0 ma pulse mode all outputs a i ddt 2.0 tone mode unloaded standby current i sc 0.3 0.5 m a hk =v dd =1.5v all outputs unloaded no 20 hk = v ss key selected input voltage v ih 0.8 1 v dd --- v il 0 0.2 r1 - r4 input current ir 16 m a c tone out voltage v oc 720 mvp.p column v dd = 2.5v d v or 560 row rl = 5k hfi pull low current i hfi 2.4 m a v dd = 2.5v (note 1) hfi pin connected to 0v c
nt91315xl series 5 dc electrical characteristics (continued) parameter symbol min. typ. max. unit conditions test ckt. hfo, hdo source current i oh1 0.25 0.85 ma v dd = 2.5v v oh = v dd - 0.4v b hfo, hdo, kt , xmute sink current i ol1 0.8 2.5 ma v dd = 2.5v v ol = 0.4v b dp sink current i ol2 0.8 2.2 ma v ol = 0.4v b distortion dis% 1 5 % * (see note below) *note: 100 * (v 1 2 +v 2 2 + . . . +vn 2 ) 1/2 dis% = (v il 2 + v ih 2 ) 1/2 1. v 1 . . . . vn are the intermodulation or the harmonic frequencies in the 500 hz to 3400 hz band. 2. v il and v ih are the individual frequency components of the dtmf signal. ac characteristics (v dd = 2.5v, v ss = 0v, fosc = 3.579mhz, top = 25 c, unless otherwise specified.) parameter symbol min. typ. max. unit conditions 33.3 10 pps m/b = 1/2 40.0 m/b = 2/3 make time t m 16.7 ms 20 pps m/b = 1/2 20.0 m/b = 2/3 66.6 10 pps m/b = 1/2 60.0 m/b = 2/3 break time t b 33.3 ms 20 pps m/b = 1/2 30.0 m/b = 2/3 inter-digit pause time t idp 824 ms 10 pps 458 20 pps pause time t pau 2.2 sec 3.6 auto-redial break time t aobk 2.2 sec delay time key valid to signal out td 2 ms pick-up pause t hk 824 ms key-in debounce tkd 22 ms key-release debounce trd 24 ms
nt91315xl series 6 ac characteristics (continued) parameter symbol min. typ. max. unit conditions key-in tone duration t ktd 27 ms key-in tone frequency f kt 437 hz minimum tone duration time t mfd 94 ms min. tone inter-digit pause t idp 96 ms redial tone duration t rfdr 94 ms redial tone inter-digit duration t tidpr 96 ms memory tone duration t rfdm 94 ms memory tone inter-digit duration t tidpm 96 ms hold-in debounce t hd 23 ms hold-release debounce t hrd 295 ms hands-free in debounce t hfid 22 ms hands-free release debounce t hfrd 24 ms comparisions of specified vs. actual tone frequencies r/c spec. actual error(%) unit conditions r1 697 699.2 +0.32 hz r2 770 766.3 -0.48 hz r3 852 847.5 -0.53 hz fosc = 3.579mhz r4 941 948.1 +0.74 hz c1 1,209 1,216.0 +0.58 hz c2 1,336 1,331.8 -0.31 hz c3 1,477 1,472.0 -0.34 hz
nt91315xl series 7 pin descriptions pin no. designation i/o description NT91315AL nt91315bl nt91315cl nt91315dl 1 2 2 2 hk i hook switch input this inverter input pin detects the state of the hook switch contact. "off hook" is represented by a v ss condition. "on hook" is represented by a v dd condition 2 3 3 3 mode in i, z tri-state mode select pin the two types the nt91315xl are listed as follows (diode options) a. without diode added mode in tone/ pulse dial rate m/b ratio v dd pulse 10pps 2/3 v ss tone - - floating pulse 10pps 1/2 b. with diode added mode in tone/ pulse dial rate m/b ratio v dd pulse 10pps 1/2 v ss tone - - floating pulse 20pps 1/2 the mode selection pin checks for tone/pulse dialing as each digit is entered. in the pulse mode, the dialing rate is checked, along with the make/break ratio, at the entry of the first key
nt91315xl series 8 pin descriptions (continued) pin no. designation i/o description NT91315AL nt91315bl nt91315cl nt91315dl 3 4 4 5 4 5 4 5 osci osco i oscillator input and output pins the time base for the nt91315xl is a crystal controlled on-chip oscillator. it is completed by connecting a 3.58 mhz crystal or ceramic resonator between the osci and osco pins 5 6 6 6 v ss power supply pins 6 7 7 7 v dd these devices are designed to operate from 2.0v to 5.5v 7 8 8 8 tone o tone dialing output when a valid keystroke is detected in dtmf mode, appropriate low group and high group frequencies are generated, which hybridize the dual tone output. tone output is in the off state when in pulse mode 8 9 9 9 xmute o dialing transmission mute output this is an n-channel open drain output. the xmute is normally off. during pulse or dtmf dialing, this output is on 9 10 12 14 dp o dialing pulse output this is an n-channel open drain output. the normal output will be on during break and off during make in the pulse dialing mode 10 11 13 15 c1 11 12 14 16 c2 12 13 15 17 c3 13 14 16 18 r1 14 15 17 19 r2 15 16 18 20 r3 16 17 19 21 r4 (n.a.) (n.a.) (n.a.) 11 c4
nt91315xl series 9 pin descriptions (continued) pin no. designation i/o description NT91315AL nt91315bl nt91315cl nt91315dl (n.a.) (n.a.) 10 10 hdo o hold output pin this inverter output pin will stay high when hold function is active (n.a.) (n.a.) 11 13 hdi i the hold function will be toggled when this pin goes from high to low in the off hook state (n.a.) (n.a) (n.a.) 12 kt o key-in tone output this n-channel open drain pin sends out a "beep" tone for each pulse mode and each store state key entry, as well as for entries of accepted function keys (st, f, a/l, r/p, save and memory keys). tone output frequency is 437 hz and tone duration is 27 ms 1 1 1 hfo o hands-free control i/o pins these pins enable and disable the hands-free control function. when input pin hfi goes low, the hands-free control state is toggled on. the status of the hands-free control state is listed in the following table: (n.a.) current state next states hook sw. hfo input hfo dialing? - low hfi high yes 18 20 22 hfi i 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
nt91315xl series 10 operating procedures symbol definitions: in the description below, signals are defined in terms of the key or switch which is activated. off hook means the phone is off the hook. on hook means the phone is on the hook . d1 represents the first digit dialed in a string of digits. dn ( dk ) represents the last digit dialed in a string of digits. dn+1 ( dk+1 ) represents the beginning of a new string of digits. st is the store key. a/l is the auto/location key. f is the flash key. rd/p is the redial/pause key. rd is the redial key. p is the pause key. mi is the emergency key. save is the save key. functional descriptions: 1. normal dialing off hook d1 . . . dn dial out d1 . . . dn in either pulse or tone mode according to the state of input pin "mode in". the redial memory will be d1 . . . dn . (the number of dialing digits is unlimited, but redial memory is limited to 32 digits.) 2. flash dialing off hook f d1 . . . dn dp will break for 96/297/640ms and pause for an additional 824ms. it will then dial out d1 . . . dn , which will be stored in redial memory. off hook d1 . . . dk f dk+1 . . . dn the f key is unavailable until d1 . . . dk is dialed out. dialing f dk+1 . . . dn uses the same process a s the previous case. the redial memory will be dk+1 . . . dn . off hook f dp will break for 96/297/640ms. redial memory remains unchanged. 3. memory dialing off hook ( a/l ) mn (n = 1, 2, 3) or off hook a/l dn ( dn = 0 - 9) dials out digits in direct memory mn or indirect memory dn (up to 16 digits). redial memory remains unchanged. notes: a. in both pulse and tone modes, there can be up to 16 digits in a memory location. the tone/pulse attribute is also recorded. in memory dialing, the "mode in" pin state does not affect the tone/pulse attribute in memory. b. the f key can be stored only as the first key in memory, not in any other position.
nt91315xl series 11 4. chain dialing a. off hook d1 . . . dk mi (i = 1, 2, 3) a/l dm ( dm = 0 - 9 ) dk+1 . . . dn . it first dials out d1 . . . dk , then the digits of mi , then the digits of indirect memory dm , and finally dk+1 . . . dn . b. off hook r/p r/p d1 . . . dn mi (i = 1, 2, 3) dials out the digits in redial memory, pauses for 2.2/3.6 sec, then dials d1 . . . dn , and finally the digits in mi . the redial memory is unchanged. note: memory keys can be accepted at any time during chain dialing, whether or not the dialing process is completed. 5. mix dialing only pulse mode to tone mode is switchable. this is achieved by either changing the mode in state, or by depressing the */t key in pulse mode. tone mode to pulse mode switching is not allowed. 6. memory storage a. direct memory storage st d1 . . . dn mi or st d1 . . . dn st mi or st d1 . . . dn a/l mi or st d1 . . . dn st a/l mi (i = 1, 2, 3). b. indirect memory storage st d1 . . . dn st dj or st d1 . . . dn a/l dj or st d1 . . . dn st a/l dj ( dj = 0 - 9). c. quick storag e st d1 . . . dk ( st a/l ) mi st dk+1 . . . dm . st dj st dm+1 . . dn a/l d1 d. redial memory storage st ( rd ) st mi (i = 1, 2, 3) or st ( rd ) st ( a/l ) dj ( dj = 0 - 9) note: st rd/p st mi will take rd/p as a pause key. e. store aft er dialing d1 . . . dn st st mi (i = 1, 2, 3) d1 . . . dn will be dialed out and will be stored in mi . d1 . . . dk st dk+1 . . . dn st a/l dj ( dj = 0 - 9) d1 . . . dk will be dialed out, and dk+1 . . . dn will be stored in a/l dj . notes: a. storage is processed in off-hook state only. b. in pulse mode, the key tone is active as valid key input. in tone mode, d1 . . . dn st st mi , only the last three keys can produce key tones, but st d1 . . . dn st a/l dj has key tones with every key entry whether in pulse or tone mode. c. ("mode in" = v dd or floated) st d1 . . . dk ("mode in" = 0) dk+1 . . . dn st dj store pulse digits d1 . . . dk , p t , and tone digits dk+1 . . . dn in indirect memory dj .
nt91315xl series 12 d. in mem ory storage, the chip will retain the tone/pulse attribute automatically. in memory dialing, the "mode in" state is ignored. e. memory storage can proceed either before dialing out a number, or after a dialing sequence is completed. f. during memory s torage, xmute , dp remains in the off state, and all outputs remain unchanged except the key tone. g. memory storage will not alter the digits in redial memory. 7. save operation a. save dialing off hook save dials out the digits in save . (up to 32 digits) b. save storage off hook d1 . . . dn save d1 . . . dn will be dialed out and stored in save . st d1 . . . dn save d1 . . . dn will be stored in save . st rd save or st ( rd ) st save the digits in redial will be stored in save . c. save to memory st save ( st ) mi stores the digits in save to mi . st save ( st ) dj stores the digits in save to a/l dj . 9. one-key redial off hook d1 . . . dn rd the rd key is unavailable until d1 . . . dn is dialed o ut. rd will break 2.2 sec and pause for 824 ms, then redial d1 . . . dn . 10. hold operation a. when in off hook state, pressing hold key will toggle hold function. b. when hands-free function is activ e, pressing hold key will activate hold function and release hands-free function. c. when hold function is active, pressing hfi key will hands-free function activate and release hold function. d. picking up receiver will release h old function.
nt91315xl series 13 timing waveforms 1. timing waveforms in pulse mode: t hk : pick-up pause, 824ms td: delay time or key valid to dialing signal out, typically 2ms t idp : inter-digit pause time t kto : key-in tone duration t kd : debounc ing time note: " hk " or "hfo" indicates that the chip is active when hook switch hk goes low or hands-free control output hfo goes high.
nt91315xl series 14 timing waveforms (continued) 2. timing waveforms in tone mode: (i) normal dialing (ii) after (i), redialing
nt91315xl series 15 timing waveforms (continued) 3. timing waveforms for switching mode operation: (i) by mode selection pin switches (ii) by */t key entry
nt91315xl series 16 timing waveforms (continued) 4. timing dialing (dtmf mode used as example): 5. memory dial (dtmf mode used as example): (1, 2, 3, 4 stored in m1)
nt91315xl series 17 timing waveforms (continued) 6. chain dialing (dtmf mode us ed as example): (1, 2, 3, 4 stored in m1)
nt91315xl series 18 ordering information pin no. key tone holds-free control hold function package NT91315AL n.a n.a n.a 16l dip nt91315bl n.a a n.a 18l dip nt91315cl n.a a a 20l dip nt91315dl a a a 22l dip n.a: not available a: available
nt91315xl series 19 package inforamtion dip 16l outline dimensions unit: inches/mm 1 8 16 d e 1 s a 2 a l c e e a a 9 b 1 b e 1 base plane a 1 seating plane symbol dimensions in inches dimensions in mm a 0.175 max. 4.45 max. a 1 0.010 min. 0.25 min. a 2 0.1300.010 3.300.25 b 0.018 +0.004 0.46 +0.10 -0.002 -0.05 b 1 0.060 +0.004 1.52 +0.10 -0.002 -0.05 c 0.010 +0.004 0.25 +0.10 -0.002 -0.05 d 0.750 typ. (0.770 max.) 19.05 typ. (19.56 max.) e 0.3000.010 7.620.25 e 1 0.250 typ. (0.262 max.) 6.35 typ. (6.65 max.) e 1 0.1000.010 2.540.25 l 0.1300.010 3.300.25 a 0 ~ 15 0 ~ 15 e a 0.3450.035 8.760.89 s 0.040 max. 1.02 max. notes: 1. the maximum value of dimension d includes end flash. 2. dimension e 1 does not include resin fins. 3. dimension s inc ludes end flash.
nt91315xl series 20 pacakge information dip 18l outline dimensions unit: inches/mm 1 9 10 18 d e 1 s a 2 a l c e e a a base plane a 1 seating plane e 1 b 1 b symbol dimensions in inches dimension in mm a 0.175 max. 4.45 max. a 1 0.010 min. 0.25 min. a 2 0.1300.010 3.300.25 b 0.018 +0.004 0.46 +0.10 -0.002 -0.05 b 1 0.060 +0.004 1.52 +0.10 -0.002 -0.05 c 0.010 +0.004 0.25 +0.10 -0.002 -0.05 d 0.900 typ. (0.920 max.) 22.86 typ. (23.37 max.) e 0.3000.010 7.620.25 e 1 0.250 typ. (0.262 max.) 6.35 typ. (6.65 max.) e 1 0.1000.010 2.540.25 l 0.1300.010 3.300.25 a 0 ~ 15 0 ~ 15 e a 0.3450.035 8.760.89 s 0.055 max. 1.40 max. notes: 1. the maximum value of dimension d includes end flash. 2. dimension e 1 does not include resin fins. 3. dimension s includes end fla sh.
nt91315xl series 21 package information dip 20l outline dimensions unit: inches/mm 1 10 11 20 d e 1 s a 2 a l c e e a a b 1 b e 1 base plane a 1 seating plane symbol dimensions in inches dimensions in mm a 0.175 max. 4.45 max. a 1 0.010 min. 0.25 min. a 2 0.1300.010 3.300.25 b 0.018 +0.004 0.46 +0.10 -0.002 -0.05 b 1 0.060 +0.004 1.52 +0.10 -0.002 -0.05 c 0.010 +0.004 0.25 +0.10 -0.002 -0.05 d 1.026 typ. (1.046 max.) 26.06 typ. (26.57 max.) e 0.3000.010 7.620.25 e 1 0.250 typ. (0.262 max.) 6.35 typ. (6.65 max.) e 1 0.1000.010 2.540.25 l 0.1300.010 3.300.25 a 0 ~ 15 0 ~ 15 e a 0.3450.035 8.760.89 s 0.078 max. 1.98 max. notes: 1. the maximum value of dimension d includes end flash. 2. dimension e 1 does not include resin fins. 3. dimension s includes end flash.
nt91315xl series 22 package information dip 22l outline dimensions unit: inches/mm 1 11 12 22 e 1 s a 2 a l c e e a a d b 1 b a 1 e 1 base plane seating plane symbol dimensions in inches dimensions in mm a 0.190 max. 4.83 max. a 1 0.010 min. 0.25 min. a 2 0.1300.010 3.300.25 b 0.018 +0.004 0.46 +0.10 -0.002 -0.05 b 1 0.060 +0.004 1.52 +0.10 -0.002 -0.05 c 0.010 +0.004 0.25 +0.10 -0.002 -0.05 d 1.090 typ. (1.110 max.) 27.69 typ. (28.19 max.) e 0.4000.010 10.160.25 e 1 0.350 typ. (0.362 max.) 8.89 typ. (9.19 max.) e 1 0.1000.010 2.540.25 l 0.1300.010 3.300.25 a 0 ~ 15 0 ~ 15 e a 0.4450.035 11.300.89 s 0.060 max. 1.52 max. notes: 1. the maximum value of dimension d includes end flash. 2. dimension e 1 does not include resin fins. 3. dimension s includes end flash.

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