W91520N
W91520N is TONE/PULSE DIALER manufactured by Winbond.
W91520N SERIES
TONE/PULSE DIALER WITH HANDFREE AND HOLD FUNCTIONS
GENERAL DESCRIPTION
The W91520N series are Si-gate CMOS ICs that provide the necessary signals for tone or pulse dialing. The W91520N series provide one-key redial, handfree dialing, hold, save, and redial functions.
Features
- DTMF/pulse switchable dialer
- Two by 32-digit redial and save memory
- Pulse-to-tone (- /T) keypad for long distance call operation
- Uses 5 × 5 keyboard
- Easy operation with redial, flash, pause, and
- /T keypads
- Pause, pulse-to-tone (- /T) can be stored as a digit in memory
- On-hook debounce time: 150 m S
- Dialing rate (10 pp S, or 20 pp S) selectable by bonding option
- Minimum tone output duration: 93 msec.
- Minimum intertone pause: 93 msec.
- Flash break time (73, 100, 300, 600 msec.) selectable by keypad; pause time is 1.0 sec.
- On-chip power-on reset
- Uses 3.579545 MHz crystal or ceramic resonator
- Packaged in 18 or 20-pin plastic DIP
- The different...
