MC145442 Datasheet, PDF (1/12 Pages) Motorola, Inc – SINGLE-CHIP 300-BAUD MODEM

MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Single-Chip 300-Baud Modem
The MC145442 and MC145443 silicon–gate CMOS single–chip low–speed
modems contain a complete frequency shift keying (FSK) modulator, demodu-
lator, and filter. These devices are with CCITT V.21 (MC145442) and Bell 103
(MC145443) 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.
• MC145442 Compatible with CCITT V.21
• MC145443 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 MC145442/D
MC145442
MC145443
20
1
P SUFFIX
PLASTIC DIP
CASE 738
20
1
DW SUFFIX
SOG PACKAGE
CASE 751D
ORDERING INFORMATION
MC145442P Plastic DIP
MC145443P Plastic DIP
MC145442DW SOG Package
MC145443DW 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
8/95
©_MOMo_Tto_Oro_Rla,_OIn_Lc._A1995
MC145442•MC145443
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