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参数资料
| 型号： | W91820N/824N |
| 厂商： | WINBOND ELECTRONICS CORP |
| 元件分类： | 无绳电话/电话 |
| 英文描述： | TELEPHONE DIALER CKT, PDIP20 |
| 封装： | PLASTIC, DIP-20 |
| 文件页数： | 16/22页 |
| 文件大小： | 260K |
| 代理商： | W91820N/824N |
W91820N SERIES
Publication Release Date: May 1999
- 3 -
Revision A2
PIN DESCRIPTION
SYMBOL
20-PIN
22-PIN
I/O
FUNCTION
Column-
Row
Inputs
1
4
&
17
20
1
4
&
19
22
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 dual tone, pulses, or functions. Activation of two or
more buttons will result in no response except for a single
tone.
XT
8
I
A built-in inverter together with an inexpensive 3.579545 MHz
crystal supplies the oscillator. The oscillator stops when there
is no keypad input. The crystal frequency deviation is 0.02%.
XT
9
O
Crystal oscillator output pin.
T/P
MUTE
10
O
The T/P MUTE is a conventional CMOS N-channel open
drain output.
The output transistor turns on with a low level during a dialing
sequence (both pulse and tone mode). Otherwise, it is off.
N.C.
16
18
-
No connect
MODE
14
16
I
Connecting the mode pin to VSS places the dialer in tone
mode.
Connecting the mode pin to VDD places the dialer in pulse
mode with an M/B ratio of 40:60.
Leaving the mode pin floating places the dialer in pulse mode
with an M/B ratio of 33.3:66.7.
HKS
11
13
I
The HKS (hook switch) input is used to sense whether the
handset is on-hook or off-hook.
In on-hook state, HKS = 1: chip is in sleeping mode, no
operation.
In off-hook state, HKS = 0: chip is enabled for normal
operation.
HKS pin is pulled to VDD by internal resistor.
KT
(W91820N/8
20AN/822N/
824N/822AN
/824AN only)
5
O
The key tone output is a conventional CMOS inverter. The
key tone is generated when any valid key is pressed; the KT
pin generates a 1.2 KHz square wave at 35 mS. When no key
is pressed, the KT pin remains in low state.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| W91822AN | 制造商:WINBOND 制造商全称:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS |
| W91822N | 制造商:WINBOND 制造商全称:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS |
| W91824AN | 制造商:WINBOND 制造商全称:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS |
| W91824N | 制造商:WINBOND 制造商全称:Winbond 功能描述:13-MEMORY TONE/PULSE DIALER WITH HANDFREE, LOCK AND HOLD FUNCTIONS |
| W9183RC | 制造商:Winslow Adaptics Ltd 功能描述:16 way DIL signal isolator,0.3in pitch |
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