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W91432 Datasheet(PDF) 2 Page - Winbond

Part # W91432
Description  13-MEMORY TONE/PULSE DIALER WITH SAVE FUNCTION
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Manufacturer  WINBOND [Winbond]
Direct Link  http://www.winbond.com
Logo WINBOND - Winbond

W91432 Datasheet(HTML) 2 Page - Winbond

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W91430N SERIES
- 2 -
PIN CONFIGURATION
C1
C2
C3
C4
SS
V
XT
XT
1
2
3
4
5
6
7
8
9
T/P MUTE
HKS
DTMF
MODE
R4
R3
R2
R1
VDD
DP
12
18
17
16
15
14
10
11
13
C5
PIN DESCRIPTION
SYMBOL
PIN
I/O
FUNCTION
Column-
Row
Inputs
1
−5
&
15
−18
I
The keyboard inputs may be used with either a standard 5
× 5
keyboard or an inexpensive single contact (Form A) keyborad.
Electronic input from a
µC can also be used.
A valid key in is defined as a single row being connected to a single
column.
XT, XT
7, 8
I, O
A built-in inverter provides oscillation with an inexpensive 3.579545
MHz crystal or ceramic resonator.
T/P
MUTE
9
O
The T/P MUTE is a conventional CMOS N-channel open drain output.
The output transistor is switched on during dialing sequence and flash
break time. Otherwise, it is switched off.
MODE
13
I
Pulling mode pin to VSS places the dialer in tone mode.
Pulling mode pin to VDD places the dialer in pulse mode with M/B ratio
40:60
(20 ppS only for W91433N and 10 ppS for the others, M/B = 40:60).
Floating mode pin places the dialer in pulse mode with M/B ratio 33:67
(20 ppS only for W91433N and 10 ppS for the others).


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