MT8888C Zarlink Semiconductor, MT8888C Datasheet

MT8888C

Manufacturer Part Number

MT8888C

Description

Integrated DTMF Transceiver with Intel Micro Interface

Manufacturer

Zarlink Semiconductor

Datasheet

1.MT8888C.pdf (26 pages)

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Features

•

Applications

•

Description

The MT8888C is a monolithic DTMF transceiver with

call progress filter. It is fabricated in CMOS technology

offering low power consumption and high reliability.

TONE

OSC1

OSC2

Central office quality DTMF transmitter/receiver

Low power consumption

High speed Intel 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+

IN-

Oscillator

Circuit

Bias

Tone Burst

Gating Cct.

Ref

∑

Zarlink, ZL and the Zarlink Semiconductor logo are trademarks of Zarlink Semiconductor Inc.

Tone

Filter

Dial

Converters

High Group

Low Group

D/A

Control

Filter

Logic

Control

Logic

Figure 1 - Functional Block Diagram

Zarlink Semiconductor Inc.

ESt

Counters

Row and

Column

and Code

Converter

Algorithm

Digital

Steering

Logic

St/GT

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 MT8888C utilizes an Intel micro interface, which

allows the device to be connected to a number of

popular microcontrollers with minimal external logic.

Transmit Data

Receive Data

MT8888CE

MT8888CS

MT8888CN

MT8888CP

Status

Control

Integrated DTMF Transceiver

with Intel Micro Interface

Ordering Information

-40°C to +85°C

20 Pin Plastic DIP

20 Pin SOIC

24 Pin SSOP

28 Pin Plastic LCC

Buffer

Control

Data

Interrupt

Bus

Logic

I/O

MT8888C

Data Sheet

February 2004

IRQ/CP

RS0

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