MT8888CC-1 MITEL [Mitel Networks Corporation], MT8888CC-1 Datasheet

MT8888CC-1

Manufacturer Part Number

MT8888CC-1

Description

Integrated DTMFTransceiver with Intel Micro Interface

Manufacturer

MITEL [Mitel Networks Corporation]

Datasheet

1.MT8888CC-1.pdf (16 pages)

Current page: 1 of 16
Download datasheet (306Kb)

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

Gating Cct.

Tone Burst

Ref

Tone

Filter

Dial

Converters

High Group

Low Group

D/A

Control

Filter

Logic

Control

Logic

Figure 1 - Functional Block Diagram

ESt

Row and

Counters

Column

Algorithm

and Code

Converter

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 MT8888C utilizes an Intel micro interface, which

allows the device to be connected to a number of

popular microcontrollers with minimal external logic.

The MT8888C-1 is functionally identical to the

MT8888C except the receiver is enhanced to accept

lower level signals, and also has a specified low

signal rejection level.

Transmit Data

Receive Data

MT8888CE/CE-1

MT8888CC/CC-1

MT8888CS/CS-1

MT8888CN/CN-1

Status

Control

Integrated DTMF Transceiver

MT8870

utilizes

MT8888C/MT8888C-1

with Intel Micro Interface

Ordering Information

-40°C to +85°C

DTMF

ISSUE 2

switched

20 Pin Plastic DIP

20 Pin Ceramic DIP

20 Pin SOIC

24 Pin SSOP

Buffer

Control

Data

Interrupt

Bus

Logic

I/O

receiver

capacitor

while

IRQ/CP

R/W

RS0

May 1995

D/A

4-91

the

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