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MC145442B Datasheet

  • MC145442B

  • Slngle-Chlp 300-Baud Modem

  • Motorola   Motorola

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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document
by MC145442B/D
Single-Chip 300-Baud Modem
The MC145442B and MC145443B silicon鈥揼ate CMOS single鈥揷hip low鈥?/div>
speed modems contain a complete frequency shift keying (FSK) modulator,
demodulator, and filter. These devices are compatible with CCITT V.21
(MC145442B) and Bell 103 (MC145443B) specifications. Both devices provide
full鈥揹uplex or half鈥揹uplex 300鈥揵aud data communication over a pair of
telephone lines. They also include a carrier detect circuit for the demodulator
section and a duplexer circuit for direct operation on a telephone line through a
simple transformer.
鈥?/div>
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MC145442B Compatible with CCITT V.21
MC145443B Compatible with Bell 103
Low鈥揃and and High鈥揃and Band鈥揚(yáng)ass Filters On鈥揅hip
Simplex, Half鈥揇uplex, and Full鈥揇uplex Operation
Originate and Answer Mode
Analog Loopback Configuration for Self Test
Hybrid Network Function On鈥揅hip
Carrier Detect Circuit On鈥揅hip
Adjustable Transmit Level and CD Delay Timing
On鈥揅hip Crystal Oscillator (3.579 MHz)
Single +5 V Power Supply Operation
Internal Mid鈥揝upply Generator
Power鈥揇own Mode
Pin Compatible with MM74HC943
Capable of Driving 鈥? dBm into a 600
鈩?/div>
Load
MC145442B
MC145443B
20
1
P SUFFIX
PLASTIC DIP
CASE 738
20
1
DW SUFFIX
SOG PACKAGE
CASE 751D
ORDERING INFORMATION
MC145442BP
MC145443BP
MC145442BDW
MC145443BDW
Plastic DIP
Plastic DIP
SOG Package
SOG Package
PIN ASSIGNMENT
DSI
LB
CD
CDT
RxD
VDD
CDA
Xout
Xin
FB
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
TLA
VAG
Exl
TxA
RxA1
RxA2
SQT
MODE
VSS
TxD
REV 1
9/00
漏
Motorola, Inc. 2000
MOTOROLA
MC145442B鈥C145443B
1

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MC145442BDW,MC145443B,MC145443BDW

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