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參數資料
| 型號： | HT9020 |
| 廠商： | Holtek Semiconductor Inc. |
| 英文描述： | Call Progress Tone Decoder & ABR Controller |
| 中文描述： | 呼叫進展音解碼器 |
| 文件頁數： | 3/12頁 |
| 文件大?。?/td> | 477K |
| 代理商： | HT9020 |
Pin Name
I/O
Internal
Connection
Description
E NV/E ND
O
CMOS OUT
CPTD mode:
While an input signal is within specification,
this pin will output the envelope relative to the input signal
with a typical 40ms timing delay.
ABR C mode:
This is an ABR finished indicating signal
output pin. When an ABR counter is full, this pin will output
a 100ms pulse.
DV/LED
O
CMOS OUT
CPTD mode:
The call progress tone is decoded in this ready
output pin. This pin can be used to trigger a microcontroller to
read the latched data at DIAL, RBK and BUSY
ABR C mode:
ABR indicating signal output. While ABR is
active, this pin will output a 0.86Hz, 25% duty cycle clock.
RTZ/SE L1
I
CMOS IN
CPTD mode:
Output data return to zero select pin
RTZ=V
DD
; The outputs of DIAL, RBK and BUSY will be
cleared when the input signal is out of specification while in
the 2.32 sec time window.
RTZ=V
SS
; The outputs of DIAL, RBK and BUSY will be
latched until the next valid data is received.
ABR C mode:
Numbers of the busy redial and time of break
selection pin.
VRE F/SE L2
I/O
CMOS I/O
(VRE F:O
SE L2:I)
CPTD mode:
1/2 V
DD
reference voltage output pin
When E N=V
DD
, the device will be turned off and VRE F
disabled. All outputs will be pulled low to reduce power
consumption.
ABR C mode:
Number of the busy redial and time of break
selection pin.
SIN
I
CMOS IN
AC coupled analog signal input pin
B3/RING
I
CMOS IN
CPTD mode:
Received busy tone pattern select pin
B3=V
DD
; BUSY will be set after three successive busy tones
are received.
B3=V
SS
; BUSY will be set immediately after a busy tone is
received.
ABR C mode:
Ringer detection input pin
VSS
—
—
Negative power supply
2.5~5.5V for CPT mode operation
2.0~5.5V for ABR mode operation
VDD
—
—
Positive power supply, 2.5~5.5V for normal operation
BUSY/
BRE AK
O
CMOS OUT
CPTD mode:
BUSY=HIGH: The detected input signal is a
busy or reorder tone
ABR C mode:
When in ABR mode, the BRE AK pin will be
high. After a busy tone is detected it will return low.
When the break timer has timed out, it will return high.
HT9020
3
21st Aug ’98
相關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 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| HT9020A | 制造商:HOLTEK 制造商全稱: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: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:未知廠家 功能描述:Subscriber Line Metering/Monitoring Circuit |
| HT9020B | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Call Progress Tone Decoder & ABR Controller |
| HT9030 | 制造商:HOLTEK 制造商全稱:Holtek Semiconductor Inc 功能描述:Calling line identification receiver |
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