MC145442B Datasheet, PDF (1/12 Pages) Motorola, Inc – SINGLE-CHIP 300-BAUD MODEM

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Single-Chip 300-Baud Modem
The MC145442B and MC145443B silicon–gate CMOS single–chip low–
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–duplex or half–duplex 300–baud 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.
• MC145442B Compatible with CCITT V.21
• MC145443B Compatible with Bell 103
• Low–Band and High–Band Band–Pass Filters On–Chip
• Simplex, Half–Duplex, and Full–Duplex Operation
• Originate and Answer Mode
• Analog Loopback Configuration for Self Test
• Hybrid Network Function On–Chip
• Carrier Detect Circuit On–Chip
• Adjustable Transmit Level and CD Delay Timing
• On–Chip Crystal Oscillator (3.579 MHz)
• Single +5 V Power Supply Operation
• Internal Mid–Supply Generator
• Power–Down Mode
• Pin Compatible with MM74HC943
• Capable of Driving –9 dBm into a 600 Ω Load
Order this document
by MC145442B/D
MC145442B
MC145443B
20
1
P SUFFIX
PLASTIC DIP
CASE 738
20
1
DW SUFFIX
SOG PACKAGE
CASE 751D
ORDERING INFORMATION
MC145442BP
MC145443BP
Plastic DIP
Plastic DIP
MC145442BDW SOG Package
MC145443BDW SOG Package
PIN ASSIGNMENT
DSI 1
LB 2
CD 3
CDT 4
RxD 5
VDD 6
CDA 7
Xout 8
Xin 9
FB 10
20 TLA
19 VAG
18 Exl
17 TxA
16 RxA1
15 RxA2
14 SQT
13 MODE
12 VSS
11 TxD
REV 1
9/00
©_MM_Oo_Tto_Orol_Ra, _OInc_L. _A2000
MC145442B•MC145443B
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