TCM29C23

Manufacturer Part NumberTCM29C23
ManufacturerTexas Instruments, Inc.
TCM29C23 datasheet
 


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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
-law and A-law Coding
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 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.
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.
VARIABLE-FREQUENCY PCM OR DSP INTERFACE
V
PWRO +
PWRO –
GSR
PDN
CLKSEL
DCLKR
PCM IN
FSR/TSRE
DGTL GND
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
TCM29C23, TCM129C23
SCTS029A – AUGUST 1989 –REVISED JULY 1996
DW OR N PACKAGE
(TOP VIEW)
1
20
V
BB
CC
2
19
GSX
ANLG IN –
3
18
ANLG IN +
4
17
ANLG GND
5
16
6
15
SIGX/ASEL
7
14
TSX/DCLKX
8
13
PCM OUT
9
12
FSX/TSXE
10
11
CLKR/CLKX
Copyright
1996, Texas Instruments Incorporated
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TCM29C23 Summary of contents