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參數資料
| 型號： | W91641 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 無繩電話/電話 |
| 英文描述： | 5-Memory Tone/Pulse Switchable Dialer(具有5個數碼存儲器的音頻/脈沖可變換撥號器) |
| 中文描述： | TELEPHONE DIALER CKT, PDIP22 |
| 封裝： | PLASTIC, DIP-22 |
| 文件頁數： | 3/16頁 |
| 文件大小： | 192K |
| 代理商： | W91641 |
W91640 SERIES
Publication Release Date: July 1996
- 3 -
Revision A1
Pin Description, continued
SYMBOL
PIN
14
I/O
O
FUNCTION
DP
N-channel open drain dialing pulse output (Figure 1).
Flash key causes DP to be active in pulse mode.
In pulse mode, remains in low state at all times.
In tone mode, sends a dual or single tone.
DTMF
15
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
17, 7
11, 12
I
Power input pins.
Handfree control pins.
HFI, HFO
I, O
A low pulse on the HFI input pin toggles the handfree control
state.
The relationships between 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 an internal resistor.
KMUTE
6
O
KMUTE is an NMOS open drain output.
KMUTE is active low when the MUTE key is pressed after
OFF HOOK or when HFO is in high state. The KMUTE state
is toggled by the MUTE key.
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| W91651 | 10-Memory Tone/Pulse Switchable Dialer(具有10個數碼存儲器的音頻/脈沖可變換撥號器) |
| W91651B | 10-Memory Tone/Pulse Switchable Dialer(具有10個數碼存儲器的音頻/脈沖可變換撥號器) |
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