W91820N Datasheet | Winbond

DESCRIPTION The W91820N is a series of tone/pulse switchable telephone dialers with 13 memory, keytone, hold, lock, and handfree dialing control features . These chips are fabricated using Winbond's highperformance CMOS technology and thus offer good performance in low-voltage, low-power operations. FEATURES - - - - - - - - - - - - - - - - - - - - - - Tone/pulse switchable dialer Two by 32 digits redial and save memory Three by 32 digits one-touch direct repertory memory Ten by 32 digits two-touch indirect repertory memory Pulse-to-tone (- /T) keypad for long distance call operation Chain dialing Uses 5 × 5 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 pp S or 20 pp S by mask option Minimum tone output duration: 93 m S (unless W91824N/AN is 87 m S) Minimum intertone pause: 93 m S (unless W91824N/AN is 87m S) Pause time: 3.6 sec. (unless W91824N/AN is 2.0 sec.) Flash break time (73 m S, 100 m S, 300 m S, or 600 m S) selectable by keypad; pause time is 1.0 S Make/break ratio (2:3 or 1:2) selectable by MODE pin Mute key for speech network mute No key will be accepted except the "HOLD" key when in the Hold mode Key tone output for valid keypad entry recognition On-chip power-on reset Uses 3.579545 MHz crystal or ceramic resonator 20, or 22-pin dual-in-line plastic package The different dialers in the W91820N series are shown in the following table: TYPE NO. W91820N/824N W91820AN/824AN W91820LN W91820ALN W91822N W91822AN PULSE (pp S) 10 10 10 10 20 20 LOCK √ √ KEY TONE √ √ √ √ HANDFREE DIALING √ √ √ PACKAGE (PINS) 20 22 20 22 20 22 Note: W91824N/824AN for French only. -1- Publication Release Date: May 1999 Revision A2 W91820N SERIES PIN CONFIGURATIONS C1 C1 C2 C3 C4 KT H/P MUTE VSS XT XT T/P MUTE 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 R4 R3 R2 R1 N.C. VDD MODE DTMF DP HKS C2 C3 C4 KT H/P MUTE VSS XT XT T/P MUTE HFI 1 2 3 4 5 6 7 8 9 10 11 22 21 20 19 18 17 16 15 14...