MT8889CN1 Zarlink Semiconductor, MT8889CN1 Datasheet

MT8889CN1

Manufacturer Part Number

MT8889CN1

Description

SSOP

Manufacturer

Zarlink Semiconductor

Datasheet

1.MT8889CE1.pdf (28 pages)

Specifications of MT8889CN1

Date_code

08+

Current page: 1 of 28
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Features

•

Applications

•

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.

TONE

OSC1

OSC2

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 -30 dBm

Credit card systems

Paging systems

Repeater systems/mobile radio

Interconnect dialers

Personal computers

IN+

IN-

Oscillator

Circuit

Bias

Gating Cct.

Tone Burst

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

Control

Logic

Figure 1 - Functional Block Diagram

Zarlink Semiconductor Inc.

ESt

Counters

Row and

Column

Converter

and Code

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 MT8889C utilizes an adaptive micro interface,

which allows the device to be connected to a number

of popular microcontrollers with minimal external logic.

Transmit Data

Receive Data

MT8889CE

MT8889CS

MT8889CN

MT8889CE1

MT8889CS1

MT8889CN1

MT8889CPR

MT8889CSR

MT8889CSR1

Control

Status

Control

with Adaptive Micro Interface

Integrated DTMF Transceiver

Ordering Information

*Pb Free Matte Tin

-40°C to +85°C

20 Pin PDIP

20 Pin SOIC

24 Pin SSOP

20 Pin PDIP*

20 Pin SOIC*

24 Pin SSOP*

28 Pin PLCC

20 Pin SOIC

20 Pin SOIC*

Buffer

Control

Data

Interrupt

Bus

Logic

I/O

Tubes

Tape & Reel

MT8889C

Data Sheet

September 2005

IRQ/CP

DS/RD

R/W/WR

RS0

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