TCM29C23_12 Datasheet, PDF (1/20 Pages) Texas Instruments – VARIABLE-FREQUENCY PCM OR DSP INTERFACE

TCM29C23, TCM129C23
VARIABLE-FREQUENCY PCM OR DSP INTERFACE
D Combined ADC, DAC, and Filters
D Extended Variable-Frequency Operation
− Master Clock Up to 4.096 MHz
− Sample Rates Up to 16 kHz
− Passband Up to 6 kHz
D Reliable Silicon-Gate CMOS Technology
D Low Power Consumption
− Operating Mode . . . 80 mW Typical
− Power-Down Mode . . . 5 mW Typical
D Excellent Power-Supply Rejection Ratio
Over Frequency Range of 0 to 50 kHz
D No External Components Needed for
Sample, Hold, and Autozero Functions
D Precision Internal Voltage References
D μ-law and A-law Coding
SCTS029B − AUGUST 1989 − REVISED NOVEMBER 1996
DW OR N PACKAGE
(TOP VIEW)
V_BB 1
PWRO + 2
PWRO − 3
GSR 4
PDN 5
CLKSEL 6
DCLKR 7
PCM IN 8
FSR/TSRE 9
DGTL GND ¹⁰
20 V_CC
19 GSX
18 ANLG IN −
17 ANLG IN +
16 ANLG GND
15 SIGX/ASEL
14 TSX/DCLKX
13 PCM OUT
12 FSX/TSXE
11 _CLKR/CLKX
description
The TCM29C23 and TCM129C23 are single-chip PCM codecs (pulse-code-modulated encoders and
decoders) and PCM lines filters. These devices provide all the functions required to interface a full-duplex
(4-wire) voice telephone circuit with a TDM (time-division-multiplexed) system. Primary applications include
digital encryption systems, digital voice-band data storage systems, digital signal processing, and mobile
telephones.
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 TCM29C23 and TCM129C23 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.
The TCM29C23 is characterized for operation from 0°C to 70°C. The TCM129C23 is characterized for operation
from −40°C to 85°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.
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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Copyright © 1996, Texas Instruments Incorporated
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