W91550AF

Product Summary

The W91550AF is a Si-gate CMOS IC tone/pulse switchable dialer containing 13 number memories and a 10-digit LCD driver for displaying telephone numbers and calling time, including a 16-digit × 3 one-touch memory, 16-digit × 10 two-touch memory dialing, and 32-digit× 2 redial and save memory. The W91550AF also provides a secrecy key, flash, two-way handfree dialing, one-key redial, hold and lock functions.

Parametrics

W91550AF absolute maximum ratings: (1)DC Supply Voltage, VDD-VSS: -0.3 to +7.0 V; (2)Input/output Voltage, VIL: VSS -0.3 V; VIH: VDD +0.3 V; VOL: VSS -0.3 V; VOH: VDD +0.3 V; (3)Power Dissipation, PD: 120 mW; (4)Operating Temperature, TOPR: -20 to 70℃; (5)Storage Temperature, TSTG: -55 to 125℃.

Features

W91550AF features: (1)Tone/pulse switchable dialer; (2)Two by 32-digit redial and save memory (or mercury memory); (3)Three by 16-digit one-touch direct repertory memory; (4)Ten by 16-digit two-touch indirect repertory memory; (5)Memory check function; (6)Save/mercury function selected by pin option; (7)Typical interdigit pause (IDP): 800 msec (10 ppS) in pulse mode; (8)Uses 4 × 7 keyboard; (9)Mute key for secrecy control; (10)Minimum tone output duration/inter-tone pause: 87/87 mS; (11)Flash pause time: 1.2 sec.; (12)Flash break time (98, 300, 600 msec) selectable by keypad; (13)Pause time (2.0, 3.6, 4.0 sec.) selectable by mask option; (14)Pulse-to-tone (*/T) keypad for long distance call operation; (15)0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out; (16)Make/break ratio selected by pin option; (17)Built-in 10-digit LCD driver for telephone number display and calling time (1/3 duty, 1/2 bias); (18)Built-in calling time from (00:00) to (59:59); (19)On-chip power-on reset and clear LCD; (20)On hook debounce: 250 msec in normal mode (20 msec in lock mode); (21)First key-in delay: 300 msec in lock mode; (22)Uses 3.579545 MHz crystal or ceramic resonator; (23)Packaged in 64-pin QFP; (24)The different dialers in the W91550DN series are shown in the following table.

Diagrams