TP3056B

MONOLITHIC SERIAL INTERFACE

COMBINED PCM CODEC AND FILTER

SLWS072A – MAY 1998 – REVISED AUGUST 1998

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POST OFFICE BOX 655303

Systems Include:

– Transmit High-Pass and Low-Pass

Filtering

– Receive Low-Pass Filter With (sin x)/x

Correction

– Active RC Noise Filters

–

µ-Law and A-Law Compatible Coder and

Decoder

– Internal Precision Voltage Reference

– Serial I/O Interface

– Internal Autozero Circuitry

Density

description

The

TP3056B

monolithic

serial

interface

combined PCM codec and filter device is

comprised of a single-chip PCM codec (pulse

code-modulated encoder and decoder) and

analog filters. This device provides all the

functions required to interface a full-duplex

(2-wire) voice telephone circuit with a TDM

(time-division-multiplexed)

system.

Primary

applications include:

switching of T1/E1 carrier, PABX, and central

office telephone systems

The TP3056B is designed to perform the transmit encoding (A/D conversion) and receive decoding (D/A

conversion), and the appropriate filtering of analog signals in a PCM system. This device is intended to be used

at the analog termination of a PCM line or trunk. It requires a master clock of 2.048 MHz, a transmit/receive data

clock that is synchronous with the master clock (but can vary from 64 kHz to 2.048 MHz), and transmit and

receive frame-sync pulses. The TP3056B contains patented circuitry to achieve low transmit channel idle noise

and is not recommended for applications in which the composite signals on the transmit side are below

– 55 dBm0.

This device, available in 16-pin N PDIP (plastic dual-in-line package) and 16-pin DW SOIC (small outline IC)

packages, is characterized for operation from 0

°C to 70°C.

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.

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.

Copyright

© 1998, 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.

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ANLG GND

VFRO

FSR

DR

ASEL

PDN

VFXI +

VFXI –

GSX

TSX

FSX

DX

BCLK

MCLK

DW OR N PACKAGE

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