GENERAL DESCRIPTION
The ML6680 is a single-chip conversion between Token Ring ISO/IEC8802-5 copper-based media and Token Ring ISO/IEC8802-5 fiber-based media. The ML6680 fiber-optic interface contains a data quantizer, circuitry for fiber optic key signal generation and recognition, pin-selectable signal switching, and current driven transmitter outputs.

FEATURES
■ Single-chip copper-to-fiber converter for Token Ring
■ 16Mbps and 4Mbps data rates with the same external components
■ Four modes of operation covering a wide variety of applications
■ Full duplex operation
■ Highly stable data quantizer with 55dB input dynamic range
■ Current driven fiber optic LED driver for accurate launch power
■ Current driven output for low RFI noise and low jitter
■ Capable of driving 100Ω UTP or 150Ω STP
■ Pin selectable phantom wire fault detection and signal switching