W91472N

W91472N SERIES 6-MEMORY TONE/PULSE DIALER WITH SAVE AND HANDFREE FUNCTIONS GENERAL DESCRIPTION The W91472N series are tone/pulse switchable telephone dialers with five memories, save memory, and handfree dialing control. These chips are fabricated using Winbond's high-performance CMOS technology and thus offer good performance in low-voltage and low-power operations. FEATURES • • • • • • • • • • • • • • • • • • • DTMF/pulse switchable dialer Two by 32 digit redial and save memory Five by 16 digit one-touch direct repertory memory Pulse-to-tone (*/T) keypad for long distance call operation Cascaded dialing Uses 5 × 6 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) selectable by bonding option On-hook debounce time: 150 mS Minimum tone output duration: 93 mS Minimum intertone pause: 93 mS Pause time: 3.6 sec. Flash break time (73 mS, 100 mS, 300 mS, or 600 mS) selectable by keypad; pause time is 1.0S 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 18 or 20-pin dual-in-line plastic package The different dialers in the W91472N series are shown in the following table: TYPE NO. W91472N W91472AN W91472BN W91472CN REPLACEMENT TYPE NO. W91472 W91472A W91472B W91472C PULSE (ppS) 10 10 20 20 FLASH (mS) 600/300/73/100 600/300/73/100 600/300/73/100 600/300/73/100 M/B Pin Pin Pin Pin KEY TONE Yes Yes HANDFREE DIALING Yes Yes PACKAGE (PINS) 18 20 18 20 -1- Publication Release Date: May 1997 Revision A2 W91472N SERIES PIN CONFIGURATIONS C1 1 20 R4 C1 1 18 R4 C2 2 19 R3 C2 2 17 R3 C3 3 18 R2 C3 3 16 R2 C4 4 17 16 R1 C4 4 15 R1 C5 5 VDD MODE C5 5 14 VDD VSS XT 6 15 VSS 6 13 MODE 7 14 DTMF XT 7 12 DTMF XT 8 13 DP/C6 XT 8 11 DP/C6 T/P MUTE 9 12 HKS T/P MUTE 9 10 HKS HFI 10 11 HFO W91472N/472BN W91472AN/472CN PIN DESCRIPTION SYMBOL ColumnRow Inputs 18-PIN 1−5 & 15−18 20-PIN 1−5 & 17−20 I/O I FUNCTION The keyboard input is compatible with a standard 5 x 6 keyboard, an inexpensive single contact (Form A) keyboard, and electronic input. In normal operation, any single button can be pushed to produce dual tone, pulses, or function. Activation of two or more buttons will result in no response except for single tone. XT 7 7 I A built-in inverter provides oscillation with an inexpensive 3.579545 MHz crystal. The oscillator ceases when a keypad input is not sensed. The crystal frequency deviation is 0.02%. Crystal oscillator output pin. The T/P MUTE is a conventional CMOS N-channel open drain output. The output transistor is switched on low level during dialing sequence (both pulse and tone mode). Otherwise, it is switched off. XT T/P MUTE 8 9 8 9 O O -2- W91472N SERIES Pin Description, continued SYMBOL MODE 18-PIN 13 20-PIN 15 I/O I FUNCTION Pulling mode pin to VSS places dialer in tone mode. Pulling mode pin to VDD places dialer in pulse mode with M/B ratio of 40:60 (10 ppS, except for 91472BN/472CN = 20 ppS). Leaving mode pin floating places dialer in pulse mode with M/B ratio of 33.3:66.7 (10 ppS, except for W91472BN/472CN = 20 ppS). HKS 10 12 I The HKS input is used to sense whether the handset is on-hook or off-hook. In on-hook state, HKS = 1: chip is in sleeping mode, no operation. In off-hook state, HKS = 0: chip is enabled for normal operation. HKS pin is pulled to VDD by internal resistor. 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, d). During pulse dialing, this pin remains in low state regardless of keypad input. In the tone mode, it will output a dual or single tone. A detailed timing diagram for tone mode is shown in Figure 2 (a, b, c, d). 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 DP / C6 11 13 O DTMF 12 14 O VDD, VSS 14, 6 16, 6 I Power input pins for the dialer chip. VDD is the main power and VSS is the ground. -3- Publication Release Date: May 1997 Revision A2 W91472N SERIES Pin Description, continued SYMBOL HFI , HFO 18-PIN - 20-PIN 10, 11 I/O I, O Handfree control pins. FUNCTION A low pulse on the HFI input pin toggles the handfree control state. Status of the handfree control state is listed in the following table: CURRENT STATE HOOK SW. HFO INPUT NEXT STATE HFO DIALING On Hook Off Hook On Hook Off Hook Off Hook Low High High Low High HFI HFI HFI Off Hook On Hook On Hook High Low Low Low Low High Yes No Yes Yes No Yes HFI pin is pulled to VDD by an internal resistor. Detailed timing diagram is shown in Figure 3. BLOCK DIAGRAM XT XT HKS HFI SYSTEM CLOCK GENERATOR CONTROL ROW (R1 to R4, Vx) KEYBOARD INTERFACE COLUMN (C1 to C5) LOCATION LATCH RAM T/P MUTE PULSE CONTROL LOGIC DP/C6 HFO LOGIC READ/WRITE COUNTER MODE DTMF D/A CONVERTER ROW & COLUMN PROGRAMMABLE COUNTER DATA LATCH & DECODER -4- W91472N SERIES FUNCTIONAL DESCRIPTION C1 1 4 7 */T F1 • • • • • • C2 2 5 8 0 F2 C3 3 6 9 # F3 C4 S F4 R/P DP / C6 M1 M2 M3 SAVE C5 M4 M5 R1 R2 R3 R4 Vx S: Store function key R/P: Redial and pause function key */T: * in tone mode and P→T key in pulse mode SAVE: Save function key for one-touch 32-digit memory M1, ..., M5: One-touch memory F1, ..., F4: Flash function keys: F1 = 600 mS, F2 = 300 mS, F3 = 73 mS, F4 = 100 mS, and all flash pause time is 1.0 mS Note: Mn = M1 , ..., M5; Dn = 0, ..., 9, */T, #, Pause. Normal Dialing OFF HOOK (or ON HOOK & HFI ¡õ ), 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 nomal dialing. Redialing OFF HOOK ON HOOK , (or ON HOOK & (or HFI ¡õ ON HOOK ), & D1 , D2 ), , ..., R/P Dn Busy, Come OFF HOOK HFI ¡õ 1. The redial memory content will be D1, D2, ..., Dn. 2. The R/P key can execute the redial function only as first key-in after off-hook. Otherwise, it will execute the pause function. -5- Publication Release Date: May 1997 Revision A2 W91472N SERIES Number Store 1. OFF HOOK , S , Mn S will be ignored. (or ON HOOK & HFI ¡õ ), D1 , D2 , ..., Dn , S a. If the sequence of the dialed digits D1, D2, ..., Dn has not finished, b. D1, D2, ..., Dn will be dialed out and stored in memory location Mn. 2. OFF HOOK , S , Mn (or ON HOOK & HFI ¡õ ), S , D1 , D2 , ..., Dn a. D1, D2, ..., Dn will be stored in memory location Mn but will not be dialed out. b. R/P digit. mode, and In */T store keys can be stored as a digit in memory, but R/P is the pause function key. R/P key cannot be the first c. The store mode is released after the store function is executed or when the state of the hook switch changes or the flash function is executed. Save 1. OFF HOOK (or ON HOOK & HFI ¡õ ), D1 , D2 , ..., Dn , SAVE a. D1, D2, ..., Dn will be dialed out. b. If the dialing of 2. ON HOOK , D1 to Dn is finished, pressing SAVE will cause D1 to Dn to be duplicated to save memory. OFF HOOK (or HFI ¡õ ), SAVE D1 to Dn will be dialed out after the SAVE key is pressed. Repertory Dialing OFF HOOK (or ON HOOK & HFI ¡õ ), Mn (or SAVE ) The content of memory location Mn (or save) will be dialed out. Access Pause OFF HOOK (or ON HOOK & HFI ¡õ ), 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 or redialing or memory dialing. 3. The pause function timing diagram is shown in Figure 4. -6- W91472N SERIES Pulse-to-Tone (*/T) OFF HOOK D1' , D2' (or , ..., ON HOOK Dn' & HFI ¡õ ), D1 , D2 , ..., Dn , */T , 1. If the mode switch is set to pulse mode, then the output signal will be: D1, D2, ..., Dn, Pause, 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 function timing diagram is shown in Figure 5. Flash OFF HOOK (or ON HOOK & HFI ¡õ ), Fn 1. Fn = F1, ..., F4. 2. If Fn is pressed, the dialer will execute flash break time of 600 mS (F1), 300 mS (F2), 73 mS (F3), or 100 mS (F4). The pause time is 1.0 second. 3. Flash key cannot be stored as a digit in memory. The flash key 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 OFF HOOK 1. (or ON HOOK & HFI ¡õ ), Normal dialing Normal dialing + (1st sequence) Repertory dialing (1st sequence) Redialing (1st sequence) + + Repertory dialing (2nd sequence) + 2. Normal dialing + (2nd sequence) + Repertory dialing 3. Normal dialing (2nd sequence) Repertory dialing Redialing and save dialing is valid only as the first key-in. -7- Publication Release Date: May 1997 Revision A2 W91472N SERIES ABSOLUTE MAXIMUM RATINGS PARAMETER DC Supply Voltage Input/Output Voltage SYMBOL VDD−VSS VIL VIH VOL VOH Power Dissipation Operating 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. = 3.58 MHz, TA = 25° C, All outputs unloaded) PARAMETER Operating Voltage Operating Current Standby Current Memory Retention Current Tone Output Voltage Pre-emphasis DTMF Distortion DTMF Output DC Level DTMF Output Sink Current DP Output Sink Current SYMBOL VDD IOP ISB IMR VTO THD VTDC ITL IPL Tone Pulse CONDITIONS - MIN. 2.0 130 1 1.0 0.2 0.5 TYP. 0.40 0.20 150 2 -30 - MAX. 5.5 0.60 0.40 15 0.2 170 3 -23 3.0 - UNIT V mA mA µA µA mVrm s dB dB V mA mA HKS = 0, No load & No key entry HKS = 1, VDD = 1.0V Row group, RL = 5 KΩ Col/Row, VDD = 2.0 to 5.5V RL = 5 KΩ, VDD = 2.0 to 5.5V RL = 5 KΩ, VDD = 2.0 to 5.5V VTO = 0.5V VPO = 0.5V -8- W91472N SERIES DC Characteristics, continued PARAMETER T/P MUTE Output Sink Current HFO Drive/Sink Current Keypad Input Drive Current Keypad Input Sink Current Keypad Resistance SYMBOL IML IHFH IHFL IKD IKS - CONDITIONS VMO = 0.5V VHFH = 2.0V VHFL = 0.5V VI = 0V VI = 2.5V - MIN. 0.5 0.5 0.5 4 200 - TYP. 400 - MAX. 5.0 UNIT mA mA µA µA KΩ AC CHARACTERISTICS PARAMETER Key-in Debounce Key Release Debounce On-hook Debounce Pre-digit Pause1 Pre-digit Pause2 Interdigit Pause (Auto dialing) Make/Break Ratio Tone Output Duration Intertone Pause Flash Break Time SYMBOL TKID TKRD TOHD TPDP1 10 ppS TPDP2 20 ppS TIDP M:B TTD TITP TFB CONDITIONS Mode Pin = VDD Mode Pin = Floating Mode Pin = VDD Mode Pin = Floating 10 ppS 20 ppS Mode Pin = VDD Mode Pin = Floating MIN. TYP. MAX. 20 20 150 40 33.3 20 16.7 800 500 40:60 33.3:66.7 93 93 600 300 73 100 1.0 3.6 UNIT mS mS mS mS mS mS mS mS mS % % mS mS mS F1 F2 F3 F4 Flash Pause Time Pause Time Notes: TFP TP S S 1. Crystal parameters suggested for proper operation are Rs < 100 Ω, 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. -9- Publication Release Date: May 1997 Revision A2 W91472N SERIES TIMING WAVEFORMS HKS TKRD KEY IN DP T/P MUTE DTMF OSC. Low OSCILLATION 3 TKID 4 2 MB MB 2 TKID TIDP TIDP TPDP TIDP TPDP TIDP OSCILLATION Figure 1(a). Normal Dialing Timing Diagram HKS TKRD KEY IN DP T/P MUTE R/P TKID MB MB T < T OHD TIDP TPDP TIDP TIDP DTMF OSC. Low OSCILLATION Figure 1(b). Pulse Mode Auto Dialing Timing Diagram - 10 - W91472N SERIES Timing Waveforms, continued HKS TKRD KEY IN DP T/P MUTE R/P TKID MB MB T > T OHD TIDP TPDP DTMF OSC. Low OSCILLATION Figure 1(c). Pulse Mode Auto Dialing Timing Diagram HKS TKRD KEY IN DTMF TTD T/P MUTE DP OSC. OSCILLATION 3 TKID 4 2 5 T ITP TITP TITP High OSCILLATION Figure 2(a). Tone Mode Normal Dialing Timing Diagram - 11 - Publication Release Date: May 1997 Revision A2 W91472N SERIES Timing Waveforms, continued HKS HFI HFO ON HOOK T/P MUTE CHIP ENBLE High Figure 3. Handfree Timing diagram HKS KEY IN DP T/P MUTE DTMF OSC. 2 R/P 3 TKID MB MB TIDP TPDP TP Low TPDP OSCILLATION Figure 4. Pause Function Timing Diagram - 12 - W91472N SERIES Timing Waveforms, continued HKS KEY IN DP T/P MUTE TIDP TITP DTMF OSC. OSCILLATION 2 TKID MB */T 3 TPDP TP Figure 5. Pulse-to-Tone Timing Diagram HKS KEY IN DP F TKID Low F F 3 TFP TFB TKID TFB TFP TKID HFI HFO T/P MUTE DTMF TITP OSC. OSCILLATION Figure 6. Flash Timing Diagram - 13 - Publication Release Date: May 1997 Revision A2 W91472N 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: 852-27516023 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. - 14 -