Datasheet Texas Instruments DS25BR400

DS25BR400
www.ti.com SNLS230I – MAY 2006 – REVISED FEBRUARY 2013 DS25BR400 Quad 2.5 Gbps CML Transceiver with Transmit
De-Emphasis and Receive Equalization
Check for Samples: DS25BR400 FEATURES DESCRIPTION The DS25BR400 is a quad 250 Mbps – 2.5 Gbps
CML transceiver, or 8-channel buffer, for use in
backplane and cable applications. With operation
down to 250 Mbps, the DS25BR400 can be used in
applications requiring both low and high frequency
data rates. Each input stage has a fixed equalizer to
reduce ISI distortion from board traces. The
equalizers are enabled through two control pins.
These control pins provide flexibility in applications
where ISI distortion may vary from one direction to
another. All output drivers have four selectable steps
of de-emphasis to compensate for transmission loss.
The de-emphasis blocks are also grouped in fours. In
addition, the DS25BR400 also has loopback control
capability on four channels. All the CML drivers have
50Ω termination to VCC. All receivers are internally
terminated with differential 100Ω. 1 2 250 Mbps – 2.5 Gbps Low Jitter Operation
Optional Fixed Input Equalization
Selectable Output De-Emphasis
Individual Loopback Controls …