W91442N

W91440N SERIES 10-MEMORY TONE/PULSE DIALER WITH SAVE FUNCTION GENERAL DESCRIPTION The W91440N series are Si-gate CMOS ICs that provide the necessary signals for either tone or pulse dialing. The W91440N series features save memory and a 10 by 16 digit automatic dialing memory. FEATURES • • • • • • • • • • • • • • • • • DTMF/pulse switchable dialer Two by 32 digit redial and save memory Ten by 16 digit two-touch direct memory Redial memory cascadable with normal dialing; dialing length is unlimited, but if length oversteps 32 digits the redial function is inhibited Pulse-to-tone (*/T) keypad for long distance call operation Uses 5 × 5 keyboard Easy operation with redial, flash, pause and */T keypads Flash, pause, P→T (Pulse-to-tone) can be stored as a digit in memory Dialing rate (10, 20 ppS ) selected by bonding option On-hook debounce time: 150 msec. Minimum tone output duration: 93 msec. Minimum intertone pause: 93 msec. Flash break time (73, 100, 300, 600 msec.) selectable by keypad, and the pause time is 1 sec. On-chip power-on reset Uses 3.579545 MHz crystal or ceramic resonator Packaged in 18-pin plastic DIP The different dialers in the W91440N series are shown in the following table: TYPE NO. W91442N REPLACEMENT TYPE NO. W91442 W91443 W91444 W91446 W91447 W91444G W91445G W91443N W91443 20 600/300/73/100 3.6 Pin PULSE (ppS) 10 FLASH (mS) 600/300/73/100 PAUSE (S) 3.6 M/B Pin -1- Publication Release Date: May 1997 Revision A3 W91440N SERIES PIN CONFIGURATION C1 C2 C3 C4 C5 VSS XT XT T/P MUTE 1 2 3 4 5 6 7 8 9 18 17 16 15 14 13 12 11 10 R4 R3 R2 R1 VDD MODE DTMF DP HKS PIN DESCRIPTION SYMBOL ColumnRow Inputs PIN 1−5 & 15−18 7, 8 9 I, O O I I/O FUNCTION The keyboard inputs may be used with either a standard 5 × 5 keyboard or an inexpensive single contact (Form A) keyboard. Electronic input from a µC can also be used. A valid key in is defined as a single row being connected to a single column. A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal or ceramic resonator. 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. 13 I Pulling mode pin to VSS places the dialer in tone mode. Pulling mode pin to VDD places the dialer in pulse mode with M/B ratio 40:60 (10 ppS only for W91442N and 20 ppS for W91443N). Floating mode pin places the dialer in pulse mode with M/B ratio 33:67 (10 ppS only for W91442N and 20 ppS for W91443N). XT, XT T/P MUTE MODE -2- W91440N SERIES Pin Description, continued SYMBOL HKS PIN 10 I/O I Hook switch input. FUNCTION HKS = VDD: On-hook state. Chip in sleeping mode, no operation. HKS = VSS: Off-hook state. Chip is enabled for normal operation. HKS pin is pulled to VDD by internal resistor. DP 11 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 in pulse mode is shown in Figure 1(a, b, c). VDD, VSS DTMF 14, 6 12 I O Power input pins. In pulse mode, this pin remains in low state at all time. 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). Output Frequency Specified R1 R2 R3 R4 C1 C2 C3 697 770 852 941 1209 1336 1477 Actual 699 766 848 948 1216 1332 1472 Error % +0.28 -0.52 -0.47 +0.74 +0.57 -0.30 -0.34 -3- Publication Release Date: May 1997 Revision A3 W91440N SERIES BLOCK DIAGRAM XT XT SYSTEM CLOCK GENERATOR HKS ROW (R1 to R4, Vx) KEYBOARD INTERFACE COLUMN (C1 to C5) LOCATION LATCH READ/WRITE COUNTER CONTROL LOGIC MODE RAM PULSE CONTROL LOGIC T/P MUTE DP DTMF D/A CONVERTER ROW & COLUMN PROGRAMMABLE COUNTER DATA LATCH & DECODER FUNCTIONAL DESCRIPTION Keyboard Operation C1 1 4 7 ∗/T F1 • S: Store function key • A: Indirect repertory dialing function key • R/P: Redial and pause function key • SAVE: Save 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 Note: D1, ..., Dn, D1', ..., Dn': 0, ..., 9, */T, #;Ln: 0, ..., 9; Fn: F1, ..., F4 C2 2 5 8 0 F2 C3 3 6 9 # F3 C4 S F4 A R/P C5 R1 R2 R3 SAVE R4 VX -4- W91440N SERIES Normal Dialing OFF HOOK , 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 OFF HOOK 2. The R/P , D1 , D2 , ..., Dn Busy, Come ON HOOK , OFF HOOK , R/P 1. The redial memory content will be dialed out. key can execute the redial function only as the first key-in after off-hook; otherwise, it executes pause function. 3. If redialing length oversteps 32 digits, the redialing function will be inhibited. Number Store OFF HOOK , D1 , D2 , ..., Dn , S , S , Ln S will be ignored. 1. If the sequence of the dialed digits D1, D2, ..., Dn has not finished, 2. D1, D2, ..., Dn will be stored in memory location and dialed out. OFF HOOK 4. R/P and , */T S , D1 , D2 , ..., Dn , S , Ln 3. D1, D2, ..., Dn will be stored in memory location but will not be dialed out. keys can be stored as a digit in memory. is the pause function key; */T is the pulse to tone function key. In store mode, R/P 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 , A , Ln Access Pause OFF HOOK , 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. A detailed timing diagram for the pause function is shown in Figure 3. -5- Publication Release Date: May 1997 Revision A3 W91440N SERIES Pulse-to-tone (*/T) OFF HOOK , D1 , D2 , ..., Dn , */T , D1' , D2' , ..., Dn' 1. If the mode switch is set in pulse mode, then the output signal will be: D1, D2, …, Dn, Pause (3.6 sec.), D1', D2', …, Dn' (Pulse) 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 by going on-hook. 4. The pulse-to-tone function timing diagram is shown in Figure 4. (Tone ) 2. If the mode switch is set in tone mode, then the output signal will be the form as follow: Flash OFF HOOK , Fn 1. Fn = F1, …, F4 2. The dialer will execute flash break time of 600 mS (F1), 300 mS (F2), 73 mS (F3), or 100 mS (F4) and all the flash pause time is 1.0 sec. before the next digit is dialed out. 3. Flash key can be stored as a digit in memory; however, only one flash will be released to users. 4. The system will return to the initial state after the flash pause time is finished. 5. The timing diagram of flash function is shown in Figure 5. Save OFF HOOK 1. If the dialing of , D1 D1 , to D2 Dn , ..., Dn , SAVE SAVE key will cause D1 to Dn to is finished, pressing the be copied to the save memory. OFF HOOK , SAVE 2. D1 to Dn will be dialed out after the save key is pressed. Cascaded Dialing 1. 2. 3. Normal Dialing + Repertory Dialing Redialing + Repertory Dialing + Normal Dialing + + + Normal Dialing Repertory Dialing Normal Dialing Repertory Dialing 4. Redialing is valid as first key-in only. -6- W91440N SERIES ABSOLUTE MAXIMUM RATINGS PARAMETER DC Supply Voltage SYMBOL VDD−VSS VIL Input/Output Voltage VIH VOL VOH Power Dissipation Operation Temperature Storage Temperature PD TOPR TSTG RATING -0.3 to +7.0 VSS −0.3 VDD +0.3 VSS −0.3 VDD +0.3 120 -20 to +70 -55 to +150 UNIT V V V V V mW °C °C Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability of the device. DC CHARACTERISTICS (VDD−VSS = 2.5V, FOSC. = 3.579545 MHz, TA = 25° C, all outputs unloaded) PARAMETER Operating Voltage Operating Current Standby Current Memory Retention Current DTMF Output Voltage Pre-emphasis DTMF Distortion DTMF Output DC Level DTMF Output Sink Current SYMBOL VDD IOP ISB IMR CONDITIONS Tone, Unloaded Pulse, Unloaded HKS = VSS, No load & No key entry HKS = VDD, VDD = 1.0V Row group, RL = 5 KΩ Col/Row, VDD = 2.0 to 5.5V MIN. 2.0 - TYP. 0.4 0.2 - MAX. 5.5 0.60 0.40 15 0.2 UNIT V mA µA µA VTO 130 1 1.0 0.2 150 2 -30 - 170 3 -23 3.0 - mVrms dB dB V mA THD VTDC ITL RL = 5 KΩ, VDD = 2.0 to 5.5V RL = 5 KΩ, VDD = 2.0 to 5.5V VTO = 0.5V -7- Publication Release Date: May 1997 Revision A3 W91440N SERIES DC Characteristics, continued PARAMETER DP Output Sink Current T/P MUTE Output Sink Current Keypad Input Drive Current Keypad Input Sink Current HKS I/P Pull-High Resistor Keypad Resistance SYMBOL IPL ITML IKD IKS RHK RK CONDITIONS VPO = 0.5V VTMO = 0.5V VI = 0.0V VI = 2.5V - MIN. 0.5 0.5 30 200 - TYP. 400 300 - MAX. 5.0 UNIT mA mA µA µA KΩ KΩ AC CHARACTERISTICS (VDD−VSS = 2.5V, FOSC. = 3.579545 MHz, TA = 25° C, all outputs unloaded) PARAMETER Key in Debounce Key Release Debounce Pulse Mute Delay Pre-digit-pause1 Pre-digit-pause2 Interdigit Pause (Auto Dialing) Make/Break Ratio Tone Output Duration Intertone Pause Flash Break Time SYMBOL TKID TKRD TMD TPDP1 10 ppS TPDP2 20 ppS TIDP M:B TTD TITP TFB CONDITIONS Mode = VDD Mode = Floating Mode = VDD Mode = Floating Mode = VDD Mode = Floating 10 ppS 20 ppS Mode = VDD Mode = Floating Auto dialing Auto dialing F1 F2 F3 F4 MIN. - TYP. 20 20 40 33.3 40 33.3 20 16.7 800 500 40:60 33:67 93 93 600 300 73 MAX. - UNIT mS mS mS mS mS mS % mS mS mS - 100 - -8- W91440N SERIES AC Characteristics, continued PARAMETER Flash Pause Time Pause Time On-hook Debounce Time SYMBOL TFP TP TOHD CONDITIONS F1, F2, F3, F4 MIN. - TYP. 1.0 3.6 150 MAX. - UNIT S S S Notes: 1. Crystal parameters suggested for proper operation are Rs < 100 ohms, 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. TIMING WAVEFORMS HKS TKRD KEY IN DP T/P MUTE 3 TKID TIDP MB 4 2 MB 2 TKID TIDP TPDP TIDP TPDP TIDP DTMF Low OSC. OSCILLATION OSCILLATION Figure 1(a) Normal Dialing Timing Diagram -9- Publication Release Date: May 1997 Revision A3 W91440N SERIES Timing Waveforms, continued HKS T KRD KEY IN DP T/P MUTE Low R/P T KID MB MB T T OHD T IDP T PDP T IDP DTMF Low OSC. OSCILLATION Figure 1(c) Pulse Mode Auto Dialing Timing Diagram - 10 - W91440N SERIES Timing Waveforms, continued HKS TKRD KEY IN DTMF T TD T/P MUTE T ITP T ITP T ITP 3 T KID 4 2 5 DP High OSC. OSCILLATION OSCILLATION Figure 2(a) Tone Mode Normal Dialing Timing Diagram HKS T KRD KEY IN DTMF T TD T/P MUTE T ITP T ITP R/P T KID T T OHD DP High OSC. OSCILLATION Figure 2(c) Tone Mode Auto Dialing Timing Diagram HKS KEY IN DP T/P MUTE 2 R/P 3 T KID MB T IDP T IDP MB T PDP TP TPDP DTMF Low OSC. OSCILLATION Figure 3. Pause Function Timing Diagram - 12 - W91440N SERIES Timing Waveforms, continued HKS KEY IN DP TPDP T/P MUTE 2 T KID MB */T 3 T IDP TP DTMF T ITP OSC. OSCILLATION Figure 4. Pulse-to-tone Timing Diagram HKS KEY IN F T KID DP T/P MUTE T FP F Low 3 T FB T FP DTMF T ITP OSC. OSCILLATION Figure 5. Flash Timing Diagram - 13 - Publication Release Date: May 1997 Revision A3 W91440N SERIES 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 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. 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. - 15 - Publication Release Date: May 1997 Revision A3