Overview

The LC89201 is a CMOS single-chip, synchronous, halfduplex, 9600-bps fax modem designed for use with public telephone networks. Built in are such essential features for Group III facsimile systems as modulator, demodulator, transmission filters, and V.24 interface.

Features

• Support for the following ITU-T standards: V.29 (9600, 7200 and 4800 bps), V.27ter (4800 and 2400 bps), V.21ch2 (300 bps), T.30, and T.4.

• Half-duplex operation.

• Group III facsimile support.

• Automatic switching between high- (V.29 and V.27ter) and low-speed (V.21ch2) incoming facsimiles.

• Short training (for ITU-T V.27ter only).

• HDLC framing and deframing (V.29, V.27ter, and V.21ch2).

• Tone generation and detection.

• Dual-tone multifrequency (DTMF) generation and detection.

• Call progress tone detection.

• Pseudo link back tone generation.

• Built-in automatic adaptive equalizer.

• Built-in fixed-amplitude amplifier.

— Link amplitude equalizer

— Cable amplitude equalizer

• Built-in transmission filters (digital filters).

• Programmable transmission level adjustment.

• Dynamic range for reception of 0 to –47 dBm.

• Programmable reception sensitivity adjustment.

• DTE interface.

— Serial interface (ITU-T V.24)

— Parallel interface (4 words × 8 bits, with built-in FIFO)

• Programmable interrupt generator.

• Built-in eye pattern generator.

• Adaptive differential pulse-code modulation (ADPCM).

• Caller ID detection.

• Built-in diagnostics.

• Energy-saving CMOS design (typ. 250 mW).

• Single 5 V power supply.

• 80-pin flat package (QIP-80E).