MT9126AS1 Zarlink Semiconductor, MT9126AS1 Datasheet

MT9126AS1

Manufacturer Part Number

MT9126AS1

Description

SOP

Manufacturer

Zarlink Semiconductor

Datasheet

1.MT9126AS1.pdf (27 pages)

Specifications of MT9126AS1

Date_code

10+

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Bonase Electronics (HK) Co., Limited

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Features

•

Applications

•

ENB2/F0od

Full duplex transcoder with four encode channels

and four decode channels

32 kb/s, 24 kb/s and 16 kb/s ADPCM coding

complying with ITU-T (previously CCITT) G.726

(without 40 kb/s), and ANSI T1.303-1989

Low power operation, 25 mW typical

Asynchronous 4.096 MHz master clock operation

SSI and ST-BUS interface options

Transparent PCM bypass

Transparent ADPCM bypass

Linear PCM code

No microprocessor control required

Simple interface to Codec devices

Pin selectable µ−Law or A-Law operation

Pin selectable ITU-T or signed magnitude PCM

coding

Single 5 volt power supply

Pair gain

Voice mail systems

Wireless telephony systems

ADPCMo

ADPCMi

MCLK

ENB1

BCLK

EN1

EN2

C2o

F0i

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

VDD VSS PWRDN IC

Timing

Figure 1 - Functional Block Diagram

ADPCM

I/O

Zarlink Semiconductor Inc.

MS1 MS2

Full Duplex

Transcoder

Quad

MS3

Description

The Quad ADPCM Transcoder is a low power, CMOS

device capable of four encode and four decode

functions per frame. Four 64 kbit/s PCM octets are

compressed into four 32, 24 or 16 kbit/s ADPCM

words, and four 32, 24 or 16 kbit/s ADPCM words are

expanded into four 64 kbit/s PCM octets. The 32, 24

and 16 kbit/s ADPCM transcoding algorithms utilized

conform to ITU-T Recommendation G.726 (excluding

40 kbit/s), and ANSI T1.303 - 1989.

Switching, on-the-fly, between 32 kbit/s and 24 kbit/s

ADPCM, is possible by controlling the appropriate

mode select (MS1 - MS6) control pins. All optional

functions of the device are pin selectable allowing a

simple interface to industry standard codecs, digital

phone devices and Layer 1 transceivers. Linear coded

PCM is provided to facilitate external DSP functions.

A/µ FORMAT

MT9126AE

MT9126AS

MT9126ASR

MT9126AE1

MT9126AS1

MT9126ASR1

Control Decode

PCM

I/O

Quad ADPCM Transcoder

MS4

Ordering Information

*Pb Free Matte Tin

-40°C to +85°C

MS5

28 Pin PDIP

28 Pin SOIC

28 Pin PDIP*

28 Pin SOIC*

MS6 LINEAR SEL

Tubes

Tape & Reel

Tubes

Tape & Reel

Data Sheet

MT9126

December 2005

PCMo2

PCMi2

PCMo1

PCMi1

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