W91210

W91210 SERIES TONE/PULSE DIALER WITH REDIAL FUNCTION GENERAL DESCRIPTION The W91210 series are Si-gate CMOS ICs that provide the necessary signals for either pulse or tone dialing. The W91210 series features a redial function. FEATURES DTMF/Pulse switchable dialer One by 32 digits for redial memory Pulse-to-tone (*/T) keypad for long distance call operation Uses 4 × 4 keyboard Easy operation with redial, flash, pause, and */T keypads Pause, P→T (pulse-to-tone) can be stored as a digit in memory Minimum tone output duration: 87 mS Minimum intertone pause: 87 mS Flash time (100 mS, 300 mS or 600 mS) selectable by keypad Pause time 3.6 sec or 2.0 sec On-chip power-on reset Uses 3.579545 MHz crystal or ceramic resonator Packaged in 16-pin plastic DIP The different dialers in the W91210 series are described in the following table: TYPE NO. PULSE (ppS) FLASH (mS) PAUSE TIME (S) M/B PULSE-TO-TONE PAUSE TIME W91212 10 100/30...