CML Semiconductor Products
Half Duplex GMSK Modem
1.0
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FX579
D/579/4 Sept 1995
Provisional Issue
Features
Half Duplex GMSK Modem for FM
Radio Data Links
Acquire Pin to assist with the
acquisition of Rx Data signals
Pin-Programmable Rx/Tx Data
Rates:
4k to 20 kbits/sec at V
DD
= 3.0V
4k to 40 kbits/sec at V
DD
= 5.0V
Serial Data Interface with Rx/Tx
Data Clock
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Low Operating Power:
< 2mA at 3.0V, < 4mA at 5.0V
Non-DSP solution
Telemetry, Wireless Alarms,
PC, Laptop and Printer Comms,
WAN and LAN and General
Purpose Data Applications
16-Pin Package with few
External Components
Low Cost
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1.1
Brief Description
The FX579 is a single chip, low cost, low current integrated circuit that performs the baseband
functions of a half duplex GMSK modem and is intended for use in FM radio data links. This general
purpose modem is suitable for data rates in the region of 4 to 40 kbits/sec, at a BT of 0.3 or 0.5.
The Tx and Rx data lines share a common pin and data is synchronised to a Tx/Rx data clock
generated by the modem. A single ACQUIRE line is provided to assist with acquisition of Rx data
signals.
©
1996 Consumer Microcircuits Limited
CMLMICRO [ CML MICROCIRCUITS ]
