Features Input and Output signal conditioning increases PCIe reach in backplanes and cables 0.09 UI of residual deterministic jitter at 5Gbps after 42” of FR4 (with Input EQ) 0.11 UI of residual deterministic jitter at 5Gbps after 7m of PCIe Cable (with Input EQ) 0.09 UI of residual deterministic jitter at 5Gbps with 28” of FR4 (with Output DE) 0.13 UI of residual deterministic jitter at 5Gbps with 7m of PCIe Cable (with Output DE) Adjustable Transmit VOD 800 to 1200mVp-p Automatic power management on an individual lane basis via SMBus Adjustable electrical idle detect threshold. Data rate optimized 3-stage equalization to 26 dB gain Data rate optimized 6-level 0 to 12 dB transmit de-emphasis Flow-thru pinout in 10mmx5.5mm 54-pin leadless LLP package Single supply operation at 2.5V >6kV HBM ESD rating -10 to 85°C operating temperature range Description The DS50PCI401 is a low power, 4 lane bidirectional buffer/equalizer designed specifically for PCI Express Gen1 and Gen2 applications. The device performs both receive equalization and transmit de-emphasis, allowing maximum flexibility of physical placement within a system. The receiver is capable of opening an input eye that is completely closed due to inter-symbol interference (ISI) induced by the interconnect medium. The transmitter de-emphasis level can be set by the user depending on the distance from the DS50PCI401 to the PCI Express endpoint. The DS50PCI401 contains PCI Express specific functions such as Transmit Idle, RX Detection, and Beacon signal pass through. The device will change the load impedance on its input pins based on the state of RXDETA/B inputs detection. An internal rate detection circuit is included to detect if an incoming data stream is at Gen2 data rates, and adjusts the de-emphasis on it's output accordingly. The signal conditioning provided by the device allows systems to upgrade from Gen1 data rates to Gen2 without reducing their physical reach. This is true for FR4 applications such as backplanes, as well as cable interconnect.

Also Recommended DS50PCI402▲ PCI-SIG Approved Gen-1/Gen-2 Repeater With Automatic Rx-detection typical application

Typical Application click for larger image typical application	Block Diagram click for larger image

Datasheets

Title		Size	Date	Other Language
	DS50PCI401 2.5 Gbps / 5.0 Gbps 4 Lane PCI Express Repeater with Equalization and De-Emphasis	921 Kbytes	29-Oct-10

Other Technical Documents

Title		Type	Date
	Driving High-Speed Signals in Data Center Servers and Storage Area Networks	Signal Path Designer	2009-09-24

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
DS50PCI401SQ/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$5.50 each at 1K+ pcs	reel of 2000
DS50PCI401SQE/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 150 AVNET-EM Worldwide 250 DIGI-KEY Worldwide 520 MOUSER Worldwide 240 TAYLOR Americas 150	$5.50 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 DS50PCI401.

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 DS50PCI401 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
DS50PCI401SQ/NOPB	141.38 141.9	LLP	54	2	260	Detail	Download	N/A	NS UZXYTTE# DS50PCI401SQ
DS50PCI401SQE/NOPB	141.38	LLP	54	2	260	Detail	Download	N/A	NS UZXYTTE# DS50PCI401SQ

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 DS50PCI401.

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 DS50PCI401 is located at RoHS Status.

Design Tools

Title	Size	Date
DS50PCI401EVK Evaluation Board User Guide

CAD Symbols and Models Download DS50PCI401 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
DS50PCI401SQ	BICMOS8B+	0	3632	0	0	2762292	2	783807897
DS50PCI401SQE	BICMOS8B+	0	3632	0	0	2762292	2	783807897

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 DS50PCI401.

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 DS50PCI401 is located at RoHS Status.