Datasheet > MT8870

MT8870

更新时间： 2024-10-31 22:45:51

品牌	Logo	应用领域
MITEL		/
页数	文件大小	规格书
12页	218K
描述
ISO2-CMOS Integrated DTMF Receiver

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数据手册

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MT8870 数据手册

_{ISO -CMOS}MT8870D/MT8870D-1

Integrated DTMF Receiver

ISSUE 3

May1995

Features

•

Complete DTMF Receiver

Ordering Information

Low power consumption

Internal gain setting amplifier

Adjustable guard time

Central office quality

Power-down mode

MT8870DE/DE-1 18 Pin Plastic DIP

MT8870DC/DC-1 18 Pin Ceramic DIP

MT8870DS/DS-1 18 Pin SOIC

MT8870DN/DN-1 20 Pin SSOP

MT8870DT/DT-1 20 Pin TSSOP

-40 °C to +85 °C

Inhibit mode

Backward compatible with

MT8870C/MT8870C-1

Description

The MT8870D/MT8870D-1 is a complete DTMF

receiver integrating both the bandsplit filter and

digital decoder functions. The filter section uses

switched capacitor techniques for high and low

group filters; the decoder uses digital counting

techniques to detect and decode all 16 DTMF tone-

pairs into a 4-bit code. External component count is

minimized by on chip provision of a differential input

amplifier, clock oscillator and latched three-state bus

interface.

Applications

•

Receiver system for British Telecom (BT) or

CEPT Spec (MT8870D-1)

•

Paging systems

Repeater systems/mobile radio

Credit card systems

Remote control

Personal computers

Telephone answering machine

VDD

VSS

VRef

INH

Bias

Circuit

PWDN

VRef

Buffer

Chip Chip

Power Bias

High Group

Filter

Digital

Detection

Algorithm

Code

Converter

and Latch

IN +

Dial

Tone

Filter

Zero Crossing

Detectors

IN -

Low Group

Filter

to all

Steering

Logic

Chip

Clocks

OSC1

OSC2

St/GT

ESt

STD

TOE

Figure 1 - Functional Block Diagram

4-11

12 3 4 5 6 7...12

中文翻译

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与MT8870相关器件

型号	品牌	获取价格	描述	数据表
MT8870D	MITEL	获取价格	ISO2-CMOS Integrated DTMF Receiver
MT8870DC	MITEL	获取价格	ISO2-CMOS Integrated DTMF Receiver
MT8870DC	ZARLINK	获取价格	DTMF Signaling Circuit, CMOS, CDIP18, CERDIP-18
MT8870DC-1	MITEL	获取价格	ISO2-CMOS Integrated DTMF Receiver
MT8870DC-1	ZARLINK	获取价格	DTMF Signaling Circuit, CMOS, CDIP18, CERDIP-18
MT8870DE	MITEL	获取价格	ISO2-CMOS Integrated DTMF Receiver
MT8870DE1	MICROSEMI	获取价格	DTMF Signaling Circuit, CMOS, PDIP18, LEAD FREE, PLASTIC, MS-001AC, DIP-18
MT8870DE1	ZARLINK	获取价格	DTMF Signaling Circuit, CMOS, PDIP18, LEAD FREE, PLASTIC, MS-001AC, DIP-18
MT8870DE-1	MITEL	获取价格	ISO2-CMOS Integrated DTMF Receiver
MT8870DE1-1	ZARLINK	获取价格	DTMF Signaling Circuit, CMOS, PDIP18, LEAD FREE, PLASTIC, MS-001AC, DIP-18