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MC145446A - Single-Chip 300-Baud Modem with DTMF Transceiver

Datasheet Summary

Features

  • Single 5 V Power Supply Compatible with CCITT V.21 DTMF Generator and Receiver for All 16 Standard Digits Capable of Driving 0 dBm into a 600 Ω Load (VCC = 5 V) AGC (Auto Gain Control) Amplifier for DTMF Receiver Imprecise Call Progress Tone (400 Hz) Detector A Transmit Attenuator Programmable in 1 dB Steps 2100 Hz Answer Tone Generator Serial Control Interface Analog Loopback Configura.

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Datasheet Details

Part number MC145446A
Manufacturer Motorola
File Size 264.82 KB
Description Single-Chip 300-Baud Modem with DTMF Transceiver
Datasheet download datasheet MC145446A Datasheet
Additional preview pages of the MC145446A datasheet.

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Full PDF Text Transcription

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MOTOROLA SEMICONDUCTOR TECHNICAL DATA Order this document by MC145446A/D 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 with a single 5 V power supply.
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