Features 2:1 multiplexer and 1:2 buffer 0.25 – 4.25 Gbps fully differential data paths Fixed input equalization Programmable output Pre-emphasis Independent pre-emphasis controls Programmable loopback modes On-chip terminations HBM ESD rating 6 kV on all pins +3.3V supply Lead-less LLP-36 package -40°C to +85°C operating temperature range 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 pre-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 Pre-emphasis to compensate for transmission losses from long FR4 backplane or cable attenuation reducing deterministic jitter. The Pre-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 are internally terminated with 100Ω differential terminating resistors. All driver outputs are internally terminated with 50Ω terminating resistors to VCC. Applications Backplane driver or cable driver Redundancy and signal conditioning applications CPRI/OBSAI

	Block Diagram click for larger image

Datasheets

Title		Size	Date	Other Language
	DS42MB100 4.25 Gbps 2:1/1:2 CML Mux/Buffer with Transmit Pre-Emphasis and Receive Equalization	335 Kbytes	13-Aug-10	日本語

Application Notes

Title		Size	Date	Other Language
	AN-1541: Application Note 1541 Driving Signals Over XAUI Backplanes Using DS42MB100, DS40MB200, or DS42BR400	49070 Kbytes	17-Mar-07	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
DS42MB100TSQ/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty AVNET-EM Worldwide 250 DIGI-KEY Worldwide 576 MOUSER Worldwide 250	$5.45 each at 1K+ pcs	reel of 250

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for DS42MB100.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for DS42MB100 is located at RoHS Status.

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
DS42MB100TSQ/NOPB	93.079	LLP	36	3	260	Detail	N/A	N/A	NS UZXYTTE# 42MB100

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for DS42MB100.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for DS42MB100 is located at RoHS Status.

Design Tools

Title	Size	Date
DS42MB100EVK Signal Conditioning Mux-Buffer Demo Board User Guide

CAD Symbols and Models N/A

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
DS42MB100TSQ	BICMOS8	2	15238	132	0	1812500	2	514301823

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.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/en/packaging/leadfree.html.

Moisture Sensitivity Level Data for DS42MB100.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/en/packaging/greennopb.html.

National's certificate of product compliance for DS42MB100 is located at RoHS Status.