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AN4980

DTMF/FSK Modem for Medical

Manufacturer

Application CategoryWired Communication
Product TypeModems
For End ProductsCellular Phone, Industrial, Smart Phone, Set-Top Box, Medical and Healthcare, Telemetry, Automatic Teller Machine, Card Reader, Electronic Meter, Caller ID, POS Register, Gas and Water Meter

Description

Configuration for Bell 202 2-Wire Dial-Up Half Duplex Operation. The switches U2A and U2C connect R2 and C1 across the transformer while receiving, while R1 is used for impedance matching while transmitting with U2B and U2D turned on

Associated Parts

Part NumberFilter TypeAssociated PartsDownload
Modem Chip Single 2.4Kbps 32-Pin QFN EP T/R
73M2901CE-IMR/FAnalog Devices

Modem Chip

Modem Chip Single 2.4Kbps 32-Pin QFN EP T/R

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