MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
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MC145446A
Product Preview Single-Chip 300-Baud Modem with DTMF Transceiver
The MC145446A is a silicon gate
CMOS frequency shift keying (FSK) modem intended for use with telemeter systems or remote control systems over the telephone network.
It replaces the MC145446.
This device is compatible with CCITT V.
21 and contains the entire circuit that provides a full–duplex or half–duplex 300–baud data communication over a pair of telephone lines.
This device also includes the DTMF generator/receiver and call progress tone detector (CPTD).
The differential line driver has the capability of driving 0 dBm into a 600 Ω load wi...