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TCM320AC54N Datasheet

  • TCM320AC54N

  • MONOLITHIC SERIAL INTERFACE COMBINED PCM CODEC AND FILTER

  • 17頁(yè)

  • TI

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TCM320AC54
MONOLITHIC SERIAL INTERFACE
COMBINED PCM CODEC AND FILTER
SCTS043A 鈥?NOVEMBER 1994 鈥?REVISED JULY 1996
D
D
D
D
D
D
D
D
D
Complete PCM Codec and Filtering System
Includes:
鈥?Transmit High-Pass and Low-Pass
Filtering
鈥?Receive Low-Pass Filter With (sin x)/x
Correction
鈥?Active RC Noise Filters
鈥?/div>
碌-Law
Compatible Coder and Decoder
鈥?Internal Precision Voltage Reference
鈥?Serial I/O Interface
鈥?Internal Autozero Circuitry
碌-Law
Coding
DTAD and DSP Interface Codec
鹵
5-V Operation
Low Operating Power . . . 50 mW Typ
Power-Down Standby Mode . . . 3 mW Typ
Automatic Power Down
TTL- or CMOS-Compatible Digital Interface
Maximizes Line Interface Card Circuit
Density
DW OR N PACKAGE
(TOP VIEW)
V
BB
ANLG GND
VFRO
V
CC
FSR
DR
BCLKR/CLKSEL
MCLKR/PDN
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
VFXI +
VFXI 鈥?/div>
GSX
TSX
FSX
DX
BCLKX
MCLKX
description
The TCM320AC54 is comprised of a single-chip PCM codec (pulse-code-modulated encoder and decoder) and
PCM line filter. 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:
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Line interface for digital transmission and switching of T1 carrier,
PABX, and central office telephone systems
Subscriber line concentrators
Digital-encryption systems
Digital signal processing
The device is 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 PCM system. It is intended to be used
at the analog termination of a PCM line or trunk. The device requires two transmit and receive master clocks
that may be asynchronous (1.536 MHz, 1.544 MHz, or 2.048 MHz), transmit and receive data clocks that are
synchronous with the master clock (but can vary from 64 kHz to 2.048 MHz), and transmit and receive
frame-sync pulses. The TCM320AC54 provides the band-pass filtering of the analog signals prior to encoding
and after decoding of voice and call progress tones.
The TCM320AC54 is characterized for operation from 0擄C to 70擄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 CMOS 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.
Copyright
漏
1996, Texas Instruments Incorporated
POST OFFICE BOX 655303
鈥?/div>
DALLAS, TEXAS 75265
1

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