W91620

W91620 SERIES 10-MEMORY TONE/PULSE DIALER WITH TWO-STAGE REDIAL FUNCTION GENERAL DESCRIPTION The W91620 series are Si-gate CMOS ICs that provide the signals needed for either pulse or tone dialing. The W91620 series features a ten-channel, 32-digit automatic dialing memory. FEATURES DTMF/Pulse switchable dialer 32-digit redial memory Two-stage redial function Ten by 32 digit two-touch indirect repertory memory Mixed dialing, cascade dialing allowed Pulse-to-tone (P→T) keypad for long distance call operation Easy operation with redial, flash, pause and P→T keypads Pause, pulse-to-tone (P→T) can be stored as a digit in memory Tone output duration: as long as key is depressed or 90 mS minimum Minimum intertone pause: 90 mS Flash time: 100 mS Uses 4 × 5 keyboard On-chip power-on reset Uses 3.579545 MHz crystal or ceramic resonator Packaged in 18-pin DIP The different dialers in the W91620 series are shown in the foll...