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參數資料
| 型號： | W91661B |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 20-Memory Tone/Pulse Switchable Dialer(具有20個數碼存儲器的音頻/脈沖可變換撥號器) |
| 中文描述： | TELEPHONE DIALER CKT, PDIP24 |
| 封裝： | PLASTIC, DIP-24 |
| 文件頁數： | 3/16頁 |
| 文件大?。?/td> | 193K |
| 代理商： | W91661B |
W91660 SERIES
Publication Release Date: September 1996
- 3 -
Revision A1
Pin Description, continued
SYMBOL
PIN
14
I/O
I
FUNCTION
HKS
Hook switch input.
HKS = 1: On-hook state. Chip in sleeping mode, no operation.
HKS = 0: Off-hook state. Chip enabled for normal operation.
HKS pin is pulled to V
DD
by internal resistor.
N-channel open drain dialing pulse output (Figure 1).
DP
15
O
Flash key causes DP to be active when in pulse mode.
No connection.
In pulse mode, remains in low state at all times.
In tone mode, sends a dual or single tone.
NC
DTMF
19
16
-
O
Specified
Actual
Error %
OUTPUT FREQUENCY
R1
R2
R3
R4
C1
C2
C3
697
770
852
941
1209
1336
1477
699
766
848
948
1216
1332
1472
+0.28
-0.52
-0.47
+0.74
+0.57
-0.30
-0.34
V
DD
, V
SS
18, 8
12, 13
I
Power input pins.
Handfree control pins.
HFI
, HFO
I, O
A low pulse on the
HFI
input pin toggles the handfree control
state.
Status of the handfree control states are listed in the following
table:
CURRENT STATE NEXT STATE
Input
HFO
Dialing
High
Yes
On Hook
High
HFI
Low
No
Off Hook
High
HFI
Low
Yes
On Hook
-
Off Hook
Low
Yes
Off Hook
Low
On Hook
Low
No
Off Hook
High
On Hook
High
Yes
-
Low
HFI
Hook SW.
HFO
HFI
pin is pulled to V
DD
by internal resistor.
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