GENERAL DESCRIPTION
The Am7968 TAXIchip Transmitter and Am7969 TAXIchip Receiver Chipset is a general-purpose interface for very high-speed (4–17.5 Mbyte/s, 40–175 Mbaud serially) point-to-point communications over coaxial or fiber-optic media. The TAXIchip set emulates a pseudo-parallel register. They load data into one side and output it on the other, except in this case, the “other” side is separated by a long serial link.

DISTINCTIVE CHARACTERISTICS
■ Parallel TTL bus interface
    — Eight Data and four Command Pins
    — or nine Data and three Command Pins
    — or ten Data and two Command Pins
■ Transparent synchronous serial link
    — +5 V ECL Serial I/O
    — AC or DC coupled
    — NRZI 4B/5B, 5B/6B encoding/decoding
■ Drive coaxial cable or twisted pair directly
■ Easy interface with fiber optic data links
■ 32–140 Mbps (4–17.5 Mbyte/s) data throughput
■ Asynchronous input using STRB/ACK
■ Automatic MUX/DEMUX of Data and Command
■ Complete on-chip PLL, Crystal Oscillator
■ Single +5 V supply operation
■ 28-pin PLCC or DIP or LCC