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參數(shù)資料
| 型號： | HT9172 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | DTMF Receiver |
| 中文描述： | 雙音多頻接收器 |
| 文件頁數(shù)： | 2/13頁 |
| 文件大?。?/td> | 124K |
| 代理商： | HT9172 |
Pin Assignment
Pin Description
Pin Name
I/O
Internal
Connection
Description
VP
I
Operational
Amplifier
Operational amplifier non-inverting input
VN
I
Operational amplifier inverting input
GS
O
Operational amplifier output terminal
VREEF
O
VREF
Reference voltage output, normally V
DD
/2
X1
I
oscillator
The system oscillator consists of an inverter, a bias resistor and the required
on-chip load capacitor.
A standard 3.579545MHz crystal connected to the X1 and X2 terminals imple-
ments the oscillator function.
X2
O
PWDN
I
CMOS IN
Pull-low
Active high. This enables the device to go into its power down mode and inhibits
the oscillator. This pin input is pulled low internally.
INH
I
CMOS IN
Pull-low
Active high. This inhibits the detection of tones representing characters A, B, C
and D. This pin input is pulled low internally.
VSS
Negative power supply, ground
OE
I
CMOS IN
Pull-high
D0~D3 output enable, active high
D0~D3
O
CMOS OUT
Tristate
Received data output terminals
OE= H : Output enable
OE= L : High impedance
DV
O
CMOS OUT
Data valid output.
When the device has received a valid DTMF tone, this line will go high; other-
wise it remains low.
EST
O
CMOS OUT
Early steering output - see Functional Description
RT/GT
I/O
CMOS IN/OUT
Tone acquisition time and release time can be set through connection with ex-
ternal resistor and capacitor.
VDD
Positive power supply, 2.5V~5.5V for normal operation
HT9172
Rev. 1.00
2
March 30, 2006
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相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT9200 | DTMF Generators |
| HT9200A | DTMF Generators |
| HT9200B | DTMF Generators |
| HT9202A | 1-Memory/2-Memory Tone/Pulse Dialer |
| HT9202B | 1-Memory/2-Memory Tone/Pulse Dialer |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT9200 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:DTMF Generators |
| HT92000526-5 | 制造商:Rennsteig 功能描述:PACK CON III FEM |
| HT9200A | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:DTMF Generators |
| HT9200A(8SOIC) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Tone Telephone Dialer |
| HT9200A_04 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:DTMF Generators |
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