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參數(shù)資料
| 型號： | M-8880 |
| 廠商： | Clare, Inc. |
| 英文描述： | M-8880 DTMF Transceiver |
| 中文描述： | 的M - 8880雙音多頻收發(fā)器 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 841K |
| 代理商： | M-8880 |
M-888
0 DTMF Transceiver
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Advanced CMOS technology for low power consump-
tion and increased noise immunity
Complete DTMF transmitter/receiver in a single chip
Standard 6500/6800 series microprocessor port
Central office quality and performance
Adjustable guard time
Automatic tone burst mode
Call progress mode
Single +5 Volt power supply
20-pin DIP and SOIC packages
2 MHz microprocessor port operation
Inexpensive 3.58 MHz crystal
No continuous
f
2 clock required, only strobe
Applications include: paging systems, repeater sys-
tems/mobile radio, interconnect dialers, PBX systems,
computer systems, fax machines, pay telephones,
credit card verification
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TheM-8880isacompleteDTMFTransmitter/Receiverthatfea-
tures adjustable guard time, automatic tone burst mode, call
progressmode,andafullycompatible6500/6800microproces-
sorinterface.Thereceiverportionisbasedontheindustrystan-
dard M-8870 DTMF Receiver, while the transmitter uses a
switched-capacitor digital-to-analog converter for
low-distortion,highlyaccurateDTMFsignaling.Toneburstscan
be transmitted with precise timing by making use of the auto-
matic tone burst mode. To analyze call progress tones, a call
progress filter can be selected by an external microprocessor.
Functional Description
M-8880functionsconsistofahigh-performanceDTMFreceiver
withaninternalgainsettingamplifierandaDTMFgeneratorthat
containsatoneburstcounterforgeneratingprecisetonebursts
andpauses.Thecallprogressmode,whenselected,allowsthe
detection of call progress tones. A standard 6500/6800 series
microprocessor interface allows access to an internal status
register, two control registers, and two data registers.
Input Configuration
The input arrangement consists of a differential input opera-
tional amplifier and bias sources (V
REF
) for biasing the amplifier
inputs at V
DD
/2. Provisions are made for the connection of a
feedback resistor to the op-amp output (GS) for gain adjust-
Page 1
40-406-00012, Rev. G www.clare.com
Figure 2 Block Diagram
Figure 1 Pin Diagram
相關PDF資料 |
PDF描述 |
|---|---|
| M-959 | Dial Pulse Counter and Hook Status Monitor |
| M-980-02P | 190840005 |
| M-980-02S | 3V/5V General Purpose Call Progress Tone Detector |
| M-980-02T | 3V/5V General Purpose Call Progress Tone Detector |
| M-980-02 | 3V/5V General Purpose Call Progress Tone Detector |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| M-8880-01P | 功能描述:IC TRANSCEIVER DTMF CMOS 20-DIP RoHS:是 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| M-8880-01SM | 功能描述:IC TRANSCEIVER DTMF CMOS 20-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| M-8880-01T | 功能描述:IC TRANSCEIVER DTMF CMOS 20-SOIC RoHS:是 類別:集成電路 (IC) >> 接口 - 電信 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS 產(chǎn)品變化通告:Product Discontinuation 06/Feb/2012 標準包裝:750 系列:* |
| M-8888 | 制造商:CLARE 制造商全稱:Clare, Inc. 功能描述:DTMF Transceiver |
| M-8888-01 | 制造商:CLARE 制造商全稱:Clare, Inc. 功能描述:DTMF Transceiver |
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