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參數(shù)資料
| 型號： | W91540 |
| 英文描述： | Tone/Pulse Telephone Dialer |
| 中文描述： | 音頻/脈沖電話撥號器 |
| 文件頁數(shù)： | 5/19頁 |
| 文件大?。?/td> | 222K |
| 代理商： | W91540 |
W91540N SERIES
Publication Release Date: May 1997
- 5 -
Revision A2
Pin Description, continued
SYMBOL
18-PIN
20-PIN
I/O
FUNCTION
DTMF
12
14
O
During pulse dialing, this pin remains in low state
regardless of 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, c, d)
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
V
DD
, V
SS
14, 6
16, 6
I
Power input pins for the dialer chip. V
DD
is the main
power and V
SS
is the ground.
HFI
, HFO
-
10, 11
I, O
Handfree control pins. A low pulse on the
HFI
input pin
toggles the handfree control state.
Status of the handfree control is listed in the following
table:
CURRENT STATE
Hook SW.
Input
HFO
High
Dialing
Yes
On Hook
High
Low
No
Off Hook
High
Low
Yes
On Hook
Off Hook
Low
Yes
Off Hook
Low
On Hook
Low
No
Off Hook
High
On Hook
High
Yes
Low
HFO
NEXT STATE
HFI
HFI
HFI
HFI
pin is pulled to V
DD
by an internal resistor.
Detailed timing diagram is shown in Figure 3.
相關PDF資料 |
PDF描述 |
|---|---|
| W91540A | Tone/Pulse Telephone Dialer |
| W91540NS | Telephone Dialer |
| W91541 | Tone/Pulse Telephone Dialer |
| W91541A | Tone/Pulse Telephone Dialer |
| W91542 | Tone/Pulse Telephone Dialer |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| W91540A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
| W91540AN | 制造商:WINBOND 制造商全稱:Winbond 功能描述:10-MEMORY TONE/PULSE DIALER WITH SAVE, KEYTONE,LOCK AND HANDFREE FUNCTION |
| W91540NS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Dialer |
| W91541 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
| W91541A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone/Pulse Telephone Dialer |
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