W91472 データシートの表示（PDF） - Winbond
部品番号
コンポーネント説明
メーカー
W91472 Datasheet PDF : 14 Pages
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PIN CONFIGURATIONS
W91472N SERIES
C1
1
C2
2
C3
3
C4
4
C5
5
VSS
6
XT
7
XT
8
T/P MUTE
9
18
R4
17
R3
16
R2
15
R1
14
VDD
13
MODE
12
DTMF
11
DP/C6
10
HKS
W91472N/472BN
C1
1
C2
2
C3
3
C4
4
C5
5
VSS
6
XT
7
XT
8
T/P MUTE
9
HFI
10
20
R4
19
R3
18
R2
17
R1
16
VDD
15
MODE
14
DTMF
13
DP/C6
12
HKS
11
HFO
W91472AN/472CN
PIN DESCRIPTION
SYMBOL 18-PIN
Column-
Row Inputs
1−5
&
15−18
XT
7
XT
8
T/P MUTE
9
20-PIN
1−5
&
17−20
7
8
9
I/O
FUNCTION
I The keyboard input is compatible with a standard 5 x 6
keyboard, an inexpensive single contact (Form A)
keyboard, and electronic input.
In normal operation, any single button can be pushed to
produce dual tone, pulses, or function. Activation of two
or more buttons will result in no response except for
single tone.
I A built-in inverter provides oscillation with an
inexpensive 3.579545 MHz crystal. The oscillator
ceases when a keypad input is not sensed. The crystal
frequency deviation is 0.02%.
O Crystal oscillator output pin.
O The T/P MUTE is a conventional CMOS N-channel
open drain output.
The output transistor is switched on low level during
dialing sequence (both pulse and tone mode).
Otherwise, it is switched off.
-2-
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