TCM29C13A, TCM29C14A, TCM29C16A, TCM29C17A,
TCM129C13A, TC,129C14A, TCM129C16A, TCM129C17A
COMBINED SINGLE-CHIP PCM CODEC AND FILTER
SCTS030E – AUGUST 1989 – REVISED OCTOBER 1996
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
Transmit Section
Autozero
ANLG IN+
ANLG IN –
GSX
Filter
Sample
and Hold
and DAC
PCM OUT
Comparator
Successive
Approximation
Output
Register
TSX/DCLKX
SIGX/ASEL
Reference
Analog-
to-Digital
Control
Logic
FSX/TSXE
CLKX
Receive Section
Filter
GSR
Gain
Set
Σ
Buffer
Sample
and Hold
and DAC
‡
Control
Section
CLKSEL
Control
Logic
PDN
ANLG
LOOP†
PCM IN
DCLKR
SIGR†
PWRO –
Digital-
to-Analog
Control
Logic
Input
Register
PWRO+
Reference
VCC
VBB
DGTL ANLG
GND GND
FSR/TSRE
CLKR†
† TCM29C14A and TCM129C14A only.
‡ TCM29C13A, TCM29C16A, TCM29C17A, TCM129C13A, TCM129C16A, and TCM129C17A only
2
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