Preliminary W91312N
TONE/PULSE DIALER WITH REDIAL FUNCTION
GENERAL DESCRIPTION
The W91312N are monolithic ICs that provide the necessary signals for either pulse or tone dialing.
The W91312 N feature a redial memory.
FEATURES
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DTMF/Pulse switchable dialer
32 digits for redial memory
Pulse-to-tone (P→T) keypad for long distance call operation
Break/Make ratio is selectable by pin option
Uses 4
×
4 keyboard
Easy operation with redial, flash, pause, and P→T keypads
Pause, P→T (pulse-to-tone) can be stored as a digit in memory
Minimum tone output duration: 93 mS
Minimum intertone pause: 93 mS
On-chip power-on reset
Uses 3.579545 MHz crystal or ceramic resonator
Packaged in 18-pin plastic DIP
The different dialers in the W91310 series are shown in the following table:
TYPE NO.
W91312N
PULSE (ppS)
10/20
FLASH (mS)
600/100/300/73
FLASH PAUSE (S)
1.0
PAUSE (S)
3.6/2.0
PIN CONFIGURATION
C1
C2
C3
C4
B/M
V
SS
XT
XT
T/P MUTE
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
R4
R3
R2
R1
V
DD
MODE
DTMF
DP
HKS
-1-
Publication Release Date: May 2000
Revision A1
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