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MC145444 Datasheet

  • MC145444

  • Advance Information Slngle-chlp 300-Baud Modem

  • Motorola   Motorola

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MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Order this document
by MC145444/D
MC145444
Advance Information
Single-Chip 300-Baud Modem
MC145444 is a silicon gate CMOS frequency shift keying (FSK) modem
intended for use with telemeter systems or remote control systems over the
telephone network.
This device is compatible with CCITT V.21 and contains the entire circuit that
provides a full鈥揹uplex or half鈥揹uplex 300鈥揵aud data communication over a pair
of telephone lines. This device also includes the DTMF generator and call
progress tone detector (CPTD).
The differential line driver has the capability of driving 0 dBm into a 600
鈩?/div>
load
with a single + 5 V power supply.
The transmit level is controlled by the programmable attenuator in 1 dB steps.
Devices functions are controlled through a 3鈥搘ire serial interface.
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Capable of Driving 0 dBm into a 600
鈩?/div>
Load
DTMF Generator On鈥揅hip
Imprecise Call Progress Detector On鈥揅hip
A Transmit Attenuator Programmable in 1 dB Steps
3鈥揥ire Serial Interface
Compatible with CCITT V.21
2100 Hz Answer Tone Generator On鈥揅hip
Analog Loopback Configuration for Self Test
Simplex, Half鈥揇uplex, and Full鈥揇uplex Operation
1
20
H SUFFIX
PLASTIC DIP
CASE 804
20
DW SUFFIX
SOG PACKAGE
CASE 751D
1
ORDERING INFORMATION
MC145444P
Plastic DIP
MC145444DW SOG Package
PIN ASSIGNMENT
RxBO
FTLC
GNDA
CDA
GND
TLA
X1
X2
SD
RxD
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
RxGC
RxA
TxA1
TxA2
DSI
VCC
ENB
SCK
DATA
TxD
This document contains information on a new product. Specifications and information herein are subject to change without notice.
REV 0
8/95
漏
Motorola, Inc. 1995
MOTOROLA
MC145444
1

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