DS40MB200

` Dual 2:1 multiplexer and 1:2 buffer
` 1 4 Gbps fully differential data paths
` Fixed input equalization
` Programmable output pre-emphasis
` Independent switch and line side pre-emphasis controls
` Programmable switch-side loopback mode
` On-chip terminations
` +3.3V supply
` Low power, 1W max
` Lead-less LLP-48 package (7mmx7mmx0.8mm, 0.5mm pitch)
` 0°C to +85°C operating temperature range

The DS40MB200 is a dual signal conditioning 2:1 multiplexer and 1:2 fan-out buffer designed for use in backplane redundancy applications. Signal conditioning features include input equalization and programmable output preemphasis that enable data communication in FR4 backplanes up to 4 Gb/s. Each input stage DS40MB200 has a fixed equalizer to reduce ISI distortion from board traces. All output drivers have 4 selectable steps of pre-emphasis to compensate for transmission losses from long FR4 backplanes and reduce deterministic jitter. The pre-emphasis levels can be independently controlled for the line-side and switch-side drivers. The DS40MB200 internal loopback paths from switch-side input to switchside output enable at-speed system testing. All receiver inputs and driver outputs are internally terminated with 100Ω differential terminating resistors