CMX969

– Packet Data Modem

Modems

CMX969

– Packet Data Modem

The CMX969 is a CMOS integrated circuit, containing baseband signal processing and Medium Access Control (MAC) functions required for a DataTAC dual mode RD-LAP 19200bps and MDC 4800bps FSK Wireless Packet Data Modem (suitable for use with the Motient/ARDIS network).

It interfaces with the modem host processor and the radio modulation/demodulation circuits, delivering reliable two-way transfer of the data.

The device is programmable to operate from a wide choice of Xtal frequencies and is available in 24 pin PDIP, SSOP and TSSOP packages.

Devices are available through our Distributor Network.

Download Datasheet

Block diagram of the CMX969 chip, labelled with data bus buffers, status/command/mode/control registers, FEC encoder/decoder, interleave/de-interleave, auto frame sync detect, Rx input amp, clock oscillator and Tx output buffer

Block diagram – CMX969

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3D rendered image of a chip package surrounded by radiating circuit-board traces, representing data modems

CMX469A

1200/2400/4800 Baud FFSK/MSK Modem

Key Features

Modulation Schemes: 1200 2400 4800
Data Range (kbps): 3.0 - 5.5
Supply Voltage (V): 3.0 - 5.5
Typ. Current (mA): 4.5
Package Type: 20-SOIC 24-TSSOP

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3D rendered image of a chip package surrounded by radiating circuit-board traces, representing data modems

CMX589A

Full-duplex GMSK Modem

Key Features

Modulation Schemes: GMSK/GFSK
Data Range (kbps): <= 200
Supply Voltage (V): 3.0 - 5.5
Typ. Current (mA): 4
Package Type: 16-SOIC 16-TSSOP

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3D rendered image of a chip package surrounded by radiating circuit-board traces, representing data modems

CMX909B

GMSK Packet Data Modem

Key Features

Modulation Schemes: GMSK
Data Range (kbps): 38.4
Supply Voltage (V): 2.7 - 5.5
Package Type: 24-TSSOP 24-SSOP

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3D rendered image of a chip package surrounded by radiating circuit-board traces, representing data modems

CMX969

RD-LAP, MCD4800 Motient/ARDIS Packet Data Modem

Key Features

Modulation Schemes: 4FSK FSK
Data Range (kbps): RD-LAP =19.2 MCD =4.8
Supply Voltage (V): 2.7 - 5.5
Typ. Current (mA): 4
Package Type: 24-TSSOP 24-SSOP

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3D rendered image of a chip package surrounded by radiating circuit-board traces, representing data modems

FX919B/MX919B

4FSK Packet Data Modem

Key Features

Modulation Schemes: 4FSK
Data Range (kbps): 19.2
Supply Voltage (V): 3.0 - 5.5
Typ. Current (mA): 4
Package Type: 24-SOIC

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