MT8889CC_CC-1 Mitel Semiconductor, MT8889CC_CC-1 Datasheet

MT8889CC_CC-1

Manufacturer Part Number

MT8889CC_CC-1

Description

6V 10mA integrated DTMF transceiver with adaptive micro interface. For paging systems, repeater systems/mobile radio, credit card systems, personal computers, interconnect dialers

Manufacturer

Mitel Semiconductor

Datasheet

1.MT8889CC_CC-1.pdf (18 pages)

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Features

•

Applications

•

Description

The MT8889C is a monolithic DTMF transceiver with

call progress filter.

technology offering low power consumption and high

reliability.

TONE

OSC1

OSC2

IN+

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

Credit card systems

Paging systems

Repeater systems/mobile radio

Interconnect dialers

Personal computers

IN-

Oscillator

Circuit

Bias

Tone Burst

Gating Cct.

Ref

Tone

Filter

Dial

It is fabricated in CMOS

Converters

High Group

Low Group

D/A

Control

Filter

Control

Logic

Figure 1 - Functional Block Diagram

ESt

Row and

Counters

Column

Converter

and Code

Algorithm

Digital

Steering

Logic

St/GT

The receiver section is based upon the industry

standard

transmitter

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.

Transmit Data

Receive Data

Status

Control

MT8889CE/CE-1

MT8889CC/CC-1

MT8889CS/CS-1

MT8889CN/CN-1

Control

with Adaptive Micro Interface

Integrated DTMF Transceiver

MT8870

utilizes

MT8889C/MT8889C-1

Ordering Information

-40°C to +85°C

DTMF

ISSUE 2

switched

Buffer

Control

Data

Interrupt

Bus

20 Pin Plastic DIP

20 Pin Ceramic DIP

20 Pin SOIC

24 Pin SSOP

Logic

I/O

receiver

capacitor

while

IRQ/CP

DS/RD

R/W/WR

RS0

May 1995

4-107

D/A

the

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