Features • 250 Mbps – 4.25 Gbps Fully Differential Data Paths • Optional Fixed Input Equalization • Selectable Output De-emphasis • Individual Loopback Controls • On-chip Termination • Lead-less eLLP-60 pin package (9 mm x 9 mm x 0.8 mm, 0.5 mm pitch) • −40°C to +85°C Industrial Temperature Range • 6 kV ESD Rating, HBM Description The DS42BR400 is a quad 250 Mbps – 4.25 Gbps CML transceiver, or 8-channel buffer, for use in backplane and cable applications. With operation down to 250 Mbps, the DS42BR400 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 grouped in fours and are enabled through two control pins. These control pins provide customers flexibility where ISI distortion may vary from one direction to another. All output drivers have four selectable steps of de-emphasis to compensate against transmission loss across long FR4 backplanes. The de-emphasis blocks are also grouped in fours. In addition, the DS42BR400 also has loopback control capability on four channels. All CML drivers have 50Ω termination to VCC. All receivers are internally terminated with differential 100Ω. Applications • Backplane driver or cable driver • Signal repeating, buffering and conditioning applications

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Typical Application *click for larger image	Block Diagram click for larger image
Typical Performance *click for larger image

Datasheet

Title		Size	Date	Other Language
	DS42BR400 Quad 4.25 Gbps CML Transceiver with Transmit De-Emphasis and Receive Equalization	320 Kbytes	2-Mar-09	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-1399: Application Note 1399 Enabling Redundancy in Multi-Gigabit Links with DS40MB200 Mux/Buffer	1440 Kbytes	17-Oct-05	日本語 中文
	AN-1398: Application Note 1398 Printed Circuit Board Design Techniques for DS40MB200	1007 Kbytes	21-Oct-05	日本語 中文
	AN-1389: Application Note 1389 Setting Pre-Emphasis Level for DS40MB200 Dual 4Gb/s Mux/Buffer	1646 Kbytes	21-Oct-05	日本語 中文

More Application Notes

Title		Size	Date	Other Language
	AN-514: Application Note 514 Timing Analysis of Synchronous and Asynchronous Buses	153 Kbytes	2-Mar-99	日本語

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
DS42BR400TSQ	BICMOS8	2	14113	142	0	1677500	3	475995205

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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