MT8870DN1 Zarlink Semiconductor, MT8870DN1 Datasheet

MT8870DN1

Manufacturer Part Number

MT8870DN1

Description

SSOP20

Manufacturer

Zarlink Semiconductor

Datasheets

1.MT8870DN1.pdf (19 pages)

2.MT8870DN1.pdf (25 pages)

Specifications of MT8870DN1

Date_code

05+

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MT8870DN1

Manufacturer:

MICREL

Quantity:

762

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Features

•

Applications

•

PWDN

Complete DTMF Receiver

Low power consumption

Internal gain setting amplifier

Adjustable guard time

Central office quality

Power-down mode

Inhibit mode

Backward compatible with MT8870C/MT8870C-1

Receiver system for British Telecom (BT) or

CEPT Spec (MT8870D-1)

Paging systems

Repeater systems/mobile radio

Credit card systems

Remote control

Personal computers

Telephone answering machine

IN +

IN -

Power

Chip

OSC1

VDD

Chip

Bias

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

Circuit

Bias

VSS

Tone

Filter

Dial

OSC2

High Group

Low Group

Figure 1 - Functional Block Diagram

Filter

to all

Chip

Clocks

Zarlink Semiconductor Inc.

Zero Crossing

Detectors

VRef

Buffer

VRef

ISO

Description

The MT8870D/MT8870D-1 is a complete DTMF

receiver integrating both the bandsplit filter and digital

decoder functions. The filter section uses switched

capacitor

the decoder uses digital counting techniques to detect

and decode all 16 DTMF tone-pairs into a 4-bit code.

St/GT

-CMOS Integrated DTMF Receiver

MT8870DE

MT8870DS

MT8870DN

MT8870DSR

MT8870DNR

MT8870DN1

MT8870DE1

MT8870DS1

MT8870DNR1

MT8870DSR1

MT8870DE1-1

MT8870DS1-1

MT8870DSR1-1

ESt

techniques

Detection

Algorithm

Digital

INH

Steering

Logic

Ordering Information

*Pb Free Matte Tin

-40°C to +85°C

18 Pin PDIP

18 Pin SOIC

20 Pin SSOP

18 Pin SOIC

20 Pin SSOP

20 Pin SSOP*

18 Pin PDIP*

18 Pin SOIC*

20 Pin SSOP*

18 Pin SOIC*

18 Pin PDIP*

18 Pin SOIC*

MT8870D/MT8870D-1

for high and low group filters;

STD

Converter

and Latch

Code

TOE

Tubes

Tape & Reel

Tubes

Tape & Reel

Tubes

Tape & Reel

Tubes

Data Sheet

October 2006

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