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W91576DNF Datasheet

  • W91576DNF

  • 23-MEMORY TONE/PULSE DIALER WITH AUTOREDIAL REC AND LCD DISP...

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W91570DN SERIES
23-MEMORY TONE/PULSE DIALER WITH
AUTOREDIAL RTC AND LCD DISPLAY FUNCTIONS
GENERAL DESCRIPTION
The W91570DN series ICs are Si-gate CMOS ICs that provide the signals needed for either pulse or
tone dialing. They feature 23 number memories and a 16-digit LCD driver for displaying telephone
numbers and calling time. A real time clock is included to display the time of day. The W91570DN
series is fabricated using CMOS technology providing good performance in low voltage, low power
applications.
FEATURES
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Three by 32 digits for redial, save and mercury memory
Twenty by 16 digits for one-touch direct or two-touch indirect repertory memory
Uses 6
脳
10 keyboard
Pause, Pulse-to-tone (*/T) and flash can be stored as a digit in memory
Minimum tone output duration: 87 mS
Minimum intertone pause: 87 mS
Tone/Pulse mode pin selectable
Make/Break ratio pin selectable
Dialing rate (10 or 20 ppS) pin selectable
Pause time (2.0 or 3.6 Sec) selectable by keypad
Flash break time (100, 300, or 600 mS) selectable by keypad
Built-in 12 or 16-digit LCD driver
(1/4
duty, 1/3 bias) selectable by mask option
Built-in calling timer from [00:00] to [59:59]
Uses 3.579545 MHz TV quartz crystal or ceramic resonator
Uses 32768 Hz crystal as RTC frequency base
Packaged in 80-pin plastic QFP with RTC
Provides one-key-redial and auto-redial functions
Switchable 24-hour clock or 12-hour clock with p.m. mode
0 or 9 dialing inhibition pin for PABX systems or long distance dialing lock out
On-hook debounce: 150 msec in normal mode and 20 msec in lock mode
Off-hook delay 300 mS in lock mode (i.e.
DP
will keep low for 300 mS while off hook)
First key-in delay: 300 msec in lock mode
MUTE key for speech mute
Cascade and mixed dialing allowed
The functions of the different dialers in the W91570DN series are shown in the following table:
PRODUCT NO.
W91572DNF
W91574DNF
W91576DNF
W91578DNF
LCD DIGITS
16
16
12
12
LOCK
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RTC BATTERY
1.5V
3V
1.5V
3V
-1-
Publication Release Date: May 1997
Revision A2

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