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參數(shù)資料
| 型號： | W91F840ALN |
| 英文描述： | Telecommunication IC |
| 中文描述： | 通信集成電路 |
| 文件頁數(shù)： | 4/26頁 |
| 文件大?。?/td> | 221K |
| 代理商： | W91F840ALN |
W91F810N SERIES
- 4 -
Pin Description, continued
SYMBOL
22-PIN 24-PIN 28-PIN
6
6
I/O
I
FUNCTION
LOCK
(W91F810LN/
F810ALN/
F811ALN only)
7
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
V
DD
V
SS
Floating
"0", "9" dialing inhibited
Normal dialing Mode
"0" dialing inhibited
H/P MUTE
7
7
8
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.
N-channel open drain dialing pulse output.
Flash key will cause
DP
to be active in either tone
mode or pulse mode.
The timing diagram for pulse mode is shown in
Figure 1(a, b).
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).
DP
13
15
18
O
DTMF
14
16
19
O
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
相關PDF資料 |
PDF描述 |
|---|---|
| W91F840AN | Telecommunication IC |
| W91F840LN | Telecommunication IC |
| W91F840N | |
| W91F841ALN | Telecommunication IC |
| W91F841AN | Telecommunication IC |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| W91F840AN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| W91F840LN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| W91F840N | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| W91F841ALN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
| W91F841AN | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication IC |
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