TCM8000 Datasheet, PDF (1/19 Pages) Texas Instruments – CELLULAR TELEPHONE AUDIO PROCESSOR

TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A – D4086, AUGUST 1992 – REVISED APRIL 1993
• Switchable AMPS/TACS and NMT
Operation
• Integrated RX and TX Voice Filters
FN PACKAGE
(TOP VIEW)
• Integrated RX and TX Data Filters
• Narrow-Band RX SAT Filter
• Pre-Emphasis and De-Emphasis Filtering
• CCITT-Compatible Compandor
• Adjustable TX and RX Limiters
• Loudspeaker Driver
• Microphone Preamplifiers
• Digitally Controlled Gains and Signal
Muting
• Low Power
DAC
RXLIM
RXDO
HSO
HFO
ST
CTI
RXVI
EXO
EXIN
ETC
6 5 4 3 2 1 44 43 42 41 40
7
39
8
38
9
37
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36
11
35
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34
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33
14
32
15
31
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30
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29
18 19 20 21 22 23 24 25 26 27 28
LIMIN
POUT
TXLIM
TXVI
CMPR
CO
CVE
CTC
CIN
TXVO
TDI
• Standby Mode
• Simple 3-Wire Digital Interface
• Low External Component Count
FR PACKAGE
(TOP VIEW)
• Single 5-V Supply
• 44-Pin PLCC Package and Thin Quad Flat
Pack
description
Implemented in advanced LinBiCMOS™
technology, the TCM8000 audio processor
provides a highly integrated solution for voice-
band signal processing in FM cellular mobile
and hand-portable telephones. The device
incorporates the necessary voice and data filters
as well as ancillary functions, such as microphone
preamplifiers, a loudspeaker driver, and a CCITT-
compatible compandor circuit. A simple 3-wire
TXO
TXSUM
PSO
LOAD
V_BTX
V_CC
V_BRX
REF
RXO
DATA
DCLK
44 43 42 41 40 39 38 37 36 35 34
1
33
2
32
3
31
4
30
5
29
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27
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25
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M20
M2N
M2P
M1N
M1P
M1O
TXDA
XT0
XT1
GND
RXIN
serial interface provides digital control over signal
path switching, muting, and gain adjustment. The
filter responses can be switched to suit Advanced
Mobile Phone System/Total Access Communication System (AMPS/TACS) and Nordic Mobile Telephone
(NMT) system requirements. Switched-capacitor techniques are used to implement the filtering functions, and
appropriate antialiasing and smoothing filters are incorporated in the device.
In the active mode, the TCM8000 uses less than 14 mA of supply current and can be set into a standby
configuration, which reduces the supply current to less than 4 mA.
The TCM8000 is characterized for operation from – 25°C to 80°C.
Caution. These devices have limited built-in 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.
LinBiCMOS is a trademark of Texas Instruments Incorporated.
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.
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
Copyright © 1993, Texas Instruments Incorporated
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