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TCM8000 Datasheet

  • TCM8000

  • CELLULAR TELEPHONE AUDIO PROCESSOR

  • 230.95KB

  • 19頁(yè)

  • TI

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TCM8000
CELLULAR TELEPHONE AUDIO PROCESSOR
SCTS041A 鈥?D4086, AUGUST 1992 鈥?REVISED APRIL 1993
鈥?/div>
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Integrated RX and TX Voice Filters
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
Standby Mode
Simple 3-Wire Digital Interface
Low External Component Count
Single 5-V Supply
44-Pin PLCC Package and Thin Quad Flat
Pack
DAC
RXLIM
RXDO
HSO
HFO
ST
CTI
RXVI
EXO
EXIN
ETC
7
8
9
DCLK
DATA
RXO
REF
V BRX
V CC
VBTX
LOAD
PSO
TXSUM
TXO
6 5 4
3
2 1 44 43 42 41 40
39
38
37
36
35
34
33
32
31
30
10
11
12
13
14
15
16
17
29
18 19 20 21 22 23 24 25 26 27 28
Switchable AMPS/TACS and NMT
Operation
FN PACKAGE
(TOP VIEW)
LIMIN
POUT
TXLIM
TXVI
CMPR
CO
CVE
CTC
CIN
TXVO
TDI
description
4
Implemented
in
advanced
LinBiCMOS鈩?/div>
30
5
technology, the TCM8000 audio processor
29
6
provides a highly integrated solution for voice-
28
7
band signal processing in FM cellular mobile
27
8
and hand-portable telephones. The device
26
incorporates the necessary voice and data filters
9
25
as well as ancillary functions, such as microphone
10
24
preamplifiers, a loudspeaker driver, and a CCITT-
11
23
12 13 14 15 16 17 18 19 20 21 22
compatible compandor circuit. A simple 3-wire
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.
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
LIMIN
POUT
TXLIM
TXVI
CMPR
CO
CVE
CTC
CIN
TXVO
TDI
M20
M2N
M2P
M1N
M1P
M1O
TXDA
XT0
XT1
GND
RXIN
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 鈥?25擄C to 80擄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
鈥?/div>
DALLAS, TEXAS 75265
DAC
RXLIM
RXDO
HSO
HFO
ST
CTI
RXVI
EXO
EXIN
ETC
RXIN
GND
XT1
XT0
TXDA
M1O
M1P
M1N
M2P
M2N
M2O
FR PACKAGE
(TOP VIEW)
Copyright
漏
1993, Texas Instruments Incorporated
1

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