W91550DN SERIES
13-MEMORY TONE/PULSE DIALER
WITH LCD AND LOCK FUNCTIONS
GENERAL DESCRIPTION
The W91550DN series are Si-gate CMOS IC tone/pulse switchable dialers 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. These dialers also provide a secrecy key, flash, two-way handfree dialing, one-key
redial, hold and lock functions.
FEATURES
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Tone/pulse switchable dialer
Two by 32-digit redial and save memory (or mercury memory)
Three by 16-digit one-touch direct repertory memory
Ten by 16-digit two-touch indirect repertory memory
Memory check function
Save/mercury function selected by pin option
Typical interdigit pause (IDP): 800 msec (10 ppS) in pulse mode
Uses 4
×
7 keyboard
Mute key for secrecy control
Minimum tone output duration/inter-tone pause: 87/87 mS
Flash pause time: 1.2 sec.
Flash break time (98, 300, 600 msec) selectable by keypad
Pause time (2.0, 3.6, 4.0 sec.) selectable by mask option
Pulse-to-tone (*/T) keypad for long distance call operation
0 or 9 dialing inhibition pin for PABX system or long distance dialing lock out
Make/break ratio selected by pin option
Built-in 10-digit LCD driver for telephone number display and calling time (1/3 duty, 1/2 bias)
Built-in calling time from (00:00) to (59:59)
On-chip power-on reset and clear LCD
On hook debounce: 250 msec in normal mode (20 msec in lock mode)
First key-in delay: 300 msec in lock mode
Uses 3.579545 MHz crystal or ceramic resonator
Packaged in 64-pin QFP
The different dialers in the W91550DN series are shown in the following table:
TYPE NO.
W91550DNF
W91550DNF-1
W91550DNH
W91550DNH-1
FUNCTION
Default pause time is 3.6 sec. and all F1, F2, F3 are first priority.
Same as W91550DN except F3 can be stored as a digit.
Default pause time is 3.6 sec. and all F1, F2, F3 are first priority.
Same as W91550DN except F3 can be stored as a digit.
PACKAGE
QFP
QFP
Chip
Chip
-1-
Publication Release Date: November 1998
Revision A3
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