TCM8000

CELLULAR TELEPHONE AUDIO PROCESSOR

SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993

POST OFFICE BOX 655303

Copyright

1

Operation

Muting

Pack

description

Implemented

in

advanced

LinBiCMOS

™

technology,

the

TCM8000

audio

processor

provides a highly integrated solution for voice-

band signal processing in FM cellular mobile

and

hand-portable

telephones.

The

device

incorporates the necessary voice and data filters

as well as ancillary functions, such as microphone

preamplifiers, a loudspeaker driver, and a CCITT-

compatible compandor circuit. A simple 3-wire

serial interface provides digital control over signal

path switching, muting, and gain adjustment. The

filter responses can be switched to suit Advanced

Mobile Phone System/Total Access Communication System (AMPS/TACS) and Nordic Mobile Telephone

(NMT) system requirements. Switched-capacitor techniques are used to implement the filtering functions, and

appropriate antialiasing and smoothing filters are incorporated in the device.

In the active mode, the TCM8000 uses less than 14 mA of supply current and can be set into a standby

configuration, which reduces the supply current to less than 4 mA.

The TCM8000 is characterized for operation from – 25

°C to 80°C.

Caution. These devices have limited built-in protection. The leads should be shorted together or the device placed in conductive foam

during storage or handling to prevent electrostatic damage to the MOS gates.

LIMIN

POUT

TXLIM

TXVI

CMPR

CO

CVE

CTC

CIN

TXVO

TDI

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DAC

RXLIM

RXDO

HSO

HFO

ST

CTI

RXVI

EXO

EXIN

ETC

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FN PACKAGE

(TOP VIEW)

54

3

2

1

644

42 41 40

43

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M20

M2N

M2P

M1N

M1P

M1O

TXDA

XT0

XT1

GND

RXIN

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TXO

TXSUM

PSO

LOAD

REF

RXO

DATA

DCLK

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FR PACKAGE

(TOP VIEW)

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38

36 35 34

37

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PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

LinBiCMOS is a trademark of Texas Instruments Incorporated.