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參數(shù)資料
| 型號(hào)： | HT9020 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Call Progress Tone Decoder & ABR Controller |
| 中文描述： | 呼叫進(jìn)展音解碼器 |
| 文件頁(yè)數(shù)： | 4/12頁(yè) |
| 文件大?。?/td> | 477K |
| 代理商： | HT9020 |
Pin Name
I/O
Internal
Connection
Description
RBK /KE Y2
O
CMOS OUT
CPTD mode:
RBK =HIGH: The detected input signal is a
ringback tone.
ABR C mode:
Transmission gate input or output pin. Used to
trigger the row and column pin of the redial key when a dial
tone is received. It will output a 100ms pulse.
DIAL/K E Y1
O
CMOS OUT
CPTD mode:
DIAL=HIGH; The detected input signal is a
dial tone.
ABR C mode:
Transmission gate input or output pin. Used to
trigger the row and column pin of the redial key when a dial
tone is received. It will output a 100ms pulse.
E N/K E Y
I
CMOS IN
CPTD mode:
E N=V
SS
; Normal operation mode
E N=V
DD
; Device disabled. The oscillator stops and all output
pins are pulled low or high impedance.
ABR C mode:
The pin is schmitt trigger input structure.
Active low. Applying a negative going pulse to this pin can
toggle the auto-busy-redial function.
CLR
I
CMOS IN
When CLR is low and BRE AK is high, the tone decoder is
reset. This pin can be connected to the mute pin of the dialer
IC for tone elimination.
X1
I
OSCILLATOR
The system oscillator consists of an inverter, a bias resistor
and the necessary load capacitor on-chip. Connect a standard
32.768kHz crystal or ceramic resonator.
X2
O
OSCILLATOR
X1 and X2 terminals implement the oscillator function.
The oscillator is turned off in the standby mode, and is
actuated whenever a keyboard entry is detected.
TE ST
I
CMOS IN
Pull-low
For testing only, active high
Approximate internal connection circuits
HT9020
4
21st Aug ’98
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HT9020A | Call Progress Tone Decoder & ABR Controller |
| HT9032 | Calling Line Identification Receiver |
| HT9033 | CAS Tone Detector |
| HT9170 | DTMF Receiver |
| HT9170B | DTMF Receiver |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HT9020A | 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:Call Progress Tone Decoder & ABR Controller |
| HT9020A(18DIP) | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Subscriber Line Metering/Monitoring Circuit |
| HT9020A(18SOIC) | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Subscriber Line Metering/Monitoring Circuit |
| HT9020B | 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:Call Progress Tone Decoder & ABR Controller |
| HT9030 | 制造商:HOLTEK 制造商全稱(chēng):Holtek Semiconductor Inc 功能描述:Calling line identification receiver |
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