TCM38C17IDL

QCombo

™ FOUR-CHANNEL (QUAD) PCM COMBO

SLWS040C – JUNE 1996 – REVISED OCTOBER 1999

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POST OFFICE BOX 655303

(CODEC and Filters)

Channel Bank Specifications

Sigma-Delta A/D and D/A Converter

Technology With DSP Filtering

Pin-Selectable

Output

Low Idle-Channel Noise, and

Good Power Supply Rejection

Technology

description

The TCM38C17IDL QCombo

™ is a 4-channel

single-chip PCM combo (pulse-code-modulated

CODEC with a voice-band filtering) device. It

performs the transmit encoding (A/D conversion)

and receive decoding (D/A conversion), as well as the transmit and receive filtering functions required to meet

CCITT G.711 and G.714 specifications in a PCM system. Each channel provides all the functions required to

interface a full-duplex, 4-line voice telephone circuit with a TDM (time-division-multiplexed) system. The

TCM38C17IDL is specifically designed for fixed-data-rate applications and is intended to replace four

TCM29C13-type devices.

Primary applications include digital transmission and switching of E1 carrier, PABX (private automatic branch

exchange), and central office telephone systems and subscriber line concentrators. The device serves as the

analog termination of a PCM line or trunk to the POTS (plain old telephone system) local-loop line.

Other applications include any PCM digital-audio interface such as voice-band data storage systems and many

digital signal processing applications that can benefit from the reduced footprint of a quad codec configuration

and single-rail operation. Dynamic range and excellent idle-channel noise performance are maintained using

the TI advanced 4Vt process technologies.

These devices have limited built-in ESD 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.

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Copyright

© 1999, Texas Instruments Incorporated

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.

TI and QCombo are registered trademarks of Texas Instruments, Inc.

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DL PACKAGE

(TOP VIEW)

RBIAS

AREF

AVSS

0GSX

0ANLGIN –

0ANLGIN+

0PWRO+

0GSR

0PWRO –

1GSX

1ANLGIN –

1ANLGIN+

1PWRO+

1GSR

1PWRO –

0PDN

1PDN

VSS

DVSS

DVDD

DVDDPLL

MCLK

DVSSPLL

ASEL

REFLTR1

REFLTR2

AVDD

2GSX

2ANLGIN –

2ANLGIN+

2PWRO+

2GSR

2PWRO –

3GSX

3ANLGIN –

3ANLGIN+

3PWRO+

3GSR

3PWRO –

3PDN

2PDN

0FS

1FS

2FS

3FS

PCMOUT

RESET

PCMIN