DS42MB100

DS42MB100 4.25 Gbps 2:1/1:2 CML Mux/Buffer with Transmit De-Emphasis and Receive Equalization December 7, 2007 DS42MB100 4.25 Gbps 2:1/1:2 CML Mux/Buffer with Transmit DeEmphasis and Receive Equalization General Description The DS42MB100 is a signal conditioning 2:1 multiplexer and 1:2 fan-out buffer designed for use in backplane redundancy or cable driving applications. Signal conditioning features include input equalization and programmable output de-emphasis that enable data communication in FR4 backplane up to 4.25 Gbps. Each input stage has a fixed equalizer to reduce ISI distortion from board traces. All output drivers have four selectable levels of de-emphasis to compensate for transmission losses from long FR4 backplane or cable attenuation reducing deterministic jitter. The de-emphasis levels can be independently controlled for the line-side and switch-side drivers. The internal loopback paths from switch-side input to switch-side output enable at-speed system testing. All receiver inputs and driver outputs are internally terminated with 100Ω differential terminating resistors. Features ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 2:1 multiplexer and 1:2 buffer 0.25 – 4.25 Gbps fully differential data paths Fixed input equalization Programmable output de-emphasis Independent de-emphasis controls Programmable loopback modes On-chip terminations HBM ESD rating 5.5 kV on all pins +3.3V supply Lead-less LLP-36 package -40°C to +85°C operating temperature range Applications ■ Backplane driv...