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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： | 17/22页 |
| 文件大小： | 260K |
| 代理商： | W91820N/824N |
W91820N SERIES
- 4 -
Pin Description, continued
SYMBOL
20-PIN
22-PIN
I/O
FUNCTION
LOCK
(W91820LN/
820ALN only)
5
I
The function of this terminal is to prevent "0" dialing and "9"
dialing under PABX system long distance call control. When
the first key input after reset is 0 or 9, all key inputs,
including the 0 or 9 key, become invalid and the chip
generates no output. The telephone is reinitialized by a
reset.
The function of the LOCK pin is shown below:
LOCK PIN
FUNCTION
VDD
VSS
Floating
"0", "9" dialing inhibited
Normal dialing Mode
"0" dialing inhibited
H/P MUTE
6
I
The H/P MUTE is a conventional inverter output. During
pulse dialing, flash break or hold period, this output is active
high; otherwise, it remains in low state.
DP
12
14
O
N-channel open drain dialing pulse output.
Flash key will cause DP to be active in either tone mode or
pulse mode.
In lock mode, the DP remains low for 300 mS durint off-
hook delay time.
The timing diagram for pulse mode is shown in Figure 1(a,
b).
DTMF
13
15
O
During pulse dialing, this pin remains in a low state
regardless of the keypad input. In tone mode, it will output a
dual or single tone.
A detailed timing diagram for tone mode is shown in Figure
2(a, b).
R1
R2
R3
R4
C1
C2
C3
Specified
697
770
852
941
1209
1336
1477
699
766
848
948
1216
1332
1472
Actual
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
Error %
OUTPUT FREQUENCY
VDD, VSS
15, 7
17, 7
I
Power input pins for the dialer chip. VDD is the power and
VSS is the ground.
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相关代理商/技术参数 |
参数描述 |
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| 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 |
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