A CMOS ethernet serial interface chip

Abstract

A 10MHz CMOS Ethernet Manchester encoder/decoder will be described. By using a PLL, the device can decode data having 18ns of jitter. The transmitter drives a 78-ohm transceiver cable directly with less than a 0.5ns skew. The chip (2μm/N-well) is 99 × 115mil2and consumes 150mW.