MT8889CS datasheet(1/18 Pages) MITEL

tên linh kiện	MT8889CS

Giải thích chi tiết về linh kiện	Integrated DTMFTransceiver with Adaptive Micro Interface

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nhà sản xuất	MITEL [Mitel Networks Corporation]

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4-107

®

Features

•

Central office quality DTMF transmitter/

receiver

•

Low power consumption

•

High speed adaptive micro interface

•

Adjustable guard time

•

Automatic tone burst mode

•

Call progress tone detection to -30dBm

Applications

•

Credit card systems

•

Paging systems

•

Repeater systems/mobile radio

•

Interconnect dialers

•

Personal computers

Description

The MT8889C is a monolithic DTMF transceiver with

call progress filter.

It is fabricated in CMOS

technology offering low power consumption and high

reliability.

The receiver section is based upon the industry

standard

MT8870

DTMF

receiver

while

the

transmitter

utilizes

a

switched

capacitor

D/A

converter for low distortion, high accuracy DTMF

signalling. Internal counters provide a

burst mode

such that tone bursts can be transmitted with precise

timing. A call progress filter can be selected allowing

a microprocessor to analyze call progress tones.

The MT8889C utilizes an adaptive micro interface,

which allows the device to be connected to a number

of popular microcontrollers with minimal external

logic. The MT8889C-1 is functionally identical to the

MT8889C except the receiver is enhanced to accept

lower level signals, and also has a specified low

signal rejection level.

Ordering Information

MT8889CE/CE-1

20 Pin Plastic DIP

MT8889CC/CC-1

20 Pin Ceramic DIP

MT8889CS/CS-1

20 Pin SOIC

MT8889CN/CN-1

24 Pin SSOP

-40°C to +85°C

Figure 1 - Functional Block Diagram

TONE

IN+

IN-

GS

OSC1

OSC2

VDD VRef

VSS

ESt

St/GT

D0

D1

D2

D3

IRQ/CP

DS/RD

CS

R/W/WR

RS0

∑

D/A

Converters

Row and

Column

Counters

Transmit Data

Register

Data

Bus

Buffer

Tone Burst

Gating Cct.

+

-

Oscillator

Circuit

Bias

Circuit

Control

Logic

Digital

Algorithm

and Code

Converter

Control

Logic

Steering

Logic

Status

Register

Control

Register

A

Control

Register

B

Receive Data

Register

Interrupt

Logic

I/O

Control

Low Group

Filter

High Group

Filter

Dial

Tone

Filter

ISSUE 2

May 1995

MT8889C/MT8889C-1

Integrated DTMF Transceiver

with Adaptive Micro Interface

Số phần tương tự - MT8889CS

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Zarlink Semiconductor I...	MT8889CS	494Kb / 31P	Integrated DTMF Transceiver with Adaptive Micro Interface

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Mô tả tương tự - MT8889CS

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