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參數資料
| 型號： | HT9170 |
| 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： | 3/12頁 |
| 文件大小： | 124K |
| 代理商： | HT9170 |
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
VREF
O
VREF
Reference voltage output, normally V
DD
/2
X1
I
OSCILLATOR
The system oscillator consists of an inverter, a bias resistor
and the necessary load capacitor on chip.
A standard 3.579545MHz crystal connected to X1 and X2 ter-
minals implements the oscillator function.
X2
O
PWDN
I
CMOS IN
Pull-low
Active high. This enables the device to go into power down
mode and inhibits the oscillator. This pin input is internally
pulled down.
INH
I
CMOS IN
Pull-low
Logic high. This inhibits the detection of tones representing
characters A, B, C and D. This pin input is internally pulled
down.
VSS
Negative power supply
OE
I
CMOS IN
Pull-high
D0~D3 output enable, high active
D0~D3
O
CMOS OUT
Tristate
Receiving data output terminals
OE= H : Output enable
OE= L : High impedance
DV
O
CMOS OUT
Data valid output
When the chip receives a valid tone (DTMF) signal, the DV
goes high; otherwise 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 external resistor and capacitor.
VDD
Positive power supply, 2.5V~5.5V for normal operation
DVB
O
CMOS OUT
One-shot type data valid output, normal high, when the chip
receives a valid time (DTMF) signal, the DVB goes low for
10ms.
HT9170
3
December 20, 1999
相關PDF資料 |
PDF描述 |
|---|---|
| HT9170B | DTMF Receiver |
| HT9170D | DTMF Receiver |
| HT9172 | DTMF Receiver |
| HT9200 | DTMF Generators |
| HT9200A | DTMF Generators |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HT9170A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DTMF Receiver |
| HT9170B | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:DTMF Receiver |
| HT9170B(18DIP) | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecomm/Datacomm |
| HT9170B_02 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:DTMF Receiver |
| HT9170C | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DTMF Receiver |
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