TCM29C13A, TCM29C14A, TCM29C16A, TCM29C17A,

TCM129C13A, TC,129C14A, TCM129C16A, TCM129C17A

COMBINED SINGLE-CHIP PCM CODEC AND FILTER

SCTS030E – AUGUST 1989 – REVISED OCTOBER 1996

2

POST OFFICE BOX 655303

description (continued)

These devices are designed to perform the transmit encoding (A/D conversion) and receive decoding (D/A

conversion) as well as the transmit and receive filtering functions in a pulse-code-modulated system. They are

intended to be used at the analog termination of a PCM line or trunk.

The TCM29C13A, TCM29C13A, TCM29C16A, TCM29C17A, TCM129C13A, TCM129C14A, TCM129C16A,

and TCM129C17A provide the band-pass filtering of the analog signals prior to encoding and after decoding.

These combination devices perform the encoding and decoding of voice and call progress tones as well as the

signaling and supervision information. These devices contain patented circuitry to achieve low transmit channel

idle noise and are not recommended for applications in which the composite signals on the transmit side are

below – 55 dBm0.

The TCM29C13A, TCM29C14A, TCM29C16A, and TCM29C17A are characterized for operation from 0

°C to

70

°C. The TCM129C13A, TCM129C14A, TCM129C16A, and TCM129C17A are characterized for operation

from – 40

°C to 85°C.

functional block diagram

Successive

Approximation

Buffer

PWRO+

PWRO –

GSR

GSX

ANLG IN –

ANLG IN+

Transmit Section

Receive Section

SIGR†

Control

Section

PDN

Control

Logic

DCLKR

PCM IN

Input

Register

Digital-

to-Analog

Control

Logic

Reference

Sample

and Hold

and DAC

Analog-

to-Digital

Control

Logic

Gain

Set

Filter

Reference

FSX/TSXE

Autozero

Output

Register

TSX/DCLKX

PCM OUT

Comparator

Sample

and Hold

and DAC

Filter

Σ

SIGX/ASEL

CLKX

CLKSEL

ANLG

LOOP†

FSR/TSRE

CLKR†

ANLG

GND

DGTL

GND

VBB

VCC

‡

† TCM29C14A and TCM129C14A only.

‡ TCM29C13A, TCM29C16A, TCM29C17A, TCM129C13A, TCM129C16A, and TCM129C17A only