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参数资料
| 型号： | AG8889 |
| 厂商： | ELAN Microelctronics Corp . |
| 英文描述： | LJT 66C 66#22D PIN RECP |
| 中文描述： | 呼叫等待解码器 |
| 文件页数： | 2/7页 |
| 文件大小： | 65K |
| 代理商： | AG8889 |
* This specification are subject to be changed without notice.
AG8889
CALL WAITING DECODER
2
8.8.2000
V.
FUNCTIONAL BLOCK DIAGRAM
VI. PIN DESCRIPTIONS
Pin
TIP
RING
OPO
VREF
PWD
I/O
Description
I
I
Tip in should be connected with twisted pair
Ring in should be connected with twisted pair
Output of OP Amp
Reference voltage Vref = 1/2 Vdd
This pin is normal low enabling chip on normal operation and ready to detect CAS
tone signals.
This active high input sets the chip into power down mode and disable oscillator to
save power.
3.58MHz oscillator in
3.58MHz oscillator out
DO : used as output, this pin determines whether DO signal is valid or not. High is
valid. Normal low.
Power
Ground
Non connected
O
I
OSCI
OSCO
DO
I
O
O
VDD
GND
NC
VII. FUNCTIONAL DESCRIPTIONS
Call Waiting service works by alerting a customer engaged in a telephone call to a new incoming call. This way the
customer can still receive important calls while engaged in a current call. The CALL WAITING DECODER can detect
CAS(Call-Waiting Alerting Signal 2130Hz plus 2750Hz) and generate a valid signal on the data pin.
The call waiting decoder is designed to support the Caller Number Deliver feature, which is offered by regional Bell
Operating Companies. The call waiting decoder has three blocks, including differential amplifier, tone filter detection block
In a typical application, this IC receives Tip and Ring signals from twisted pairs. The signals as inputs of differential
amplifier, and the differential amplifier sends input signal to a band pass tone filter. Once the signal is filtered, the
digital detection block decodes the information. The output data made available at DO pin.
This IC is used for detecting CAS signals. Once the signal is detected, the detection indication is shown on the data
output DO pin. The DO pin is normal low. When this IC detects 2130Hz and 2750Hz frequency at the same time, then
DO pin goes to high.
TIP
Filter
Vdd/2
Voltage
Reference
Clock
Generator
DO
OPO
Tone
Detection Block
VREF
PWD
OSCI OSCO
RING
相关PDF资料 |
PDF描述 |
|---|---|
| AG8889AP | Circular Connector; No. of Contacts:66; Series:MS27468; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:19; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:19-35 RoHS Compliant: No |
| AG8889N | Circular Connector; No. of Contacts:66; Series:MS27468; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:19; Circular Contact Gender:Pin; Circular Shell Style:Jam Nut Receptacle; Insert Arrangement:19-35 RoHS Compliant: No |
| ah-27 | Circular Connector; No. of Contacts:22; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:12-22 RoHS Compliant: No |
| ah-29 | Circular Connector; No. of Contacts:22; Series:MS27473; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:12; Circular Contact Gender:Socket; Circular Shell Style:Straight Plug; Insert Arrangement:12-22 RoHS Compliant: No |
| AH0014 | Sand Paper; Abrasive Grade:F SFN; Color:White; Pack Quantity:3; Roll Length:30ft; Width:4" |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AG8889AP | 制造商:EMC 制造商全称:ELAN Microelectronics Corp 功能描述:CALL WAITING DECODER |
| AG8889N | 制造商:EMC 制造商全称:ELAN Microelectronics Corp 功能描述:CALL WAITING DECODER |
| AG88S5502247026ALT1 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| AG9000-S | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Power-Over-Ethernet Module |
| AG903-07E | 功能描述:AAL024-10E CURRENT SENS EVAL BRD 制造商:nve corp/sensor products 系列:* 零件状态:在售 标准包装:1 |
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