W91541LN 查看數據表（PDF） - Winbond
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W91541LN Datasheet PDF : 19 Pages
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W91540N SERIES
Pin Configurations, continued
C1 1
C2 2
C3 3
C4 4
LOCK 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/C5
10 HKS
W91541LN
C1 1
C2 2
C3 3
C4 4
LOCK 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/C5
12 HKS
11 HFO
W91541ALN
PIN DESCRIPTION
SYMBOL
18-PIN
Column-Row
Inputs
1−4
&
15−18
XT
7
XT
8
T/P MUTE
9
20-PIN
1−4
&
17−20
7
8
9
I/O
FUNCTION
I The keyboard input is compatible with a standard
5 × 5 keyboard, an inexpensive single contact
(Form A) keyboard, and electronic input.
In normal operation, any single button can be
pushed to produce a dual tone, pulses, or a
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.
Publication Release Date: May 1997
-3-
Revision A2
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