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).