Features DC - 3.125 Gbps low jitter, high noise immunity, low power operation Four levels of transmit pre-emphasis drive lossy backplanes and cables On-chip 100Ω input and output termination minimizes insertion and return losses, reduces component count and minimizes board space 7 kV ESD on LVDS I/O pins protects adjoining components Small 3 mm x 3 mm 8-LLP space saving package Description The DS25BR120 is a single channel 3.125 Gbps LVDS buffer optimized for high-speed signal transmission over lossy FR-4 printed circuit board backplanes and balanced metallic cables. Fully differential signal paths ensure exceptional signal integrity and noise immunity. The DS25BR120 features four levels of pre-emphasis (PE) for use as an optimized driver device. Other LVDS devices with similar IO characteristics include the following products. The DS25BR110 features four levels of equalization for use as an optimized receiver device, while the DS25BR100 features both pre-emphasis and equalization for use as an optimized repeater device. The DS25BR150 is a buffer/repeater with the lowest power consumption and does not feature transmit pre-emphasis nor receive equalization. Wide input common mode range allows the receiver to accept signals with LVDS, CML and LVPECL levels; the output levels are LVDS. A very small package footprint requires minimal space on the board while the flow-through pinout allows easy board layout. The differential inputs and outputs are internally terminated with a 100Ω resistor to lower device input and output return losses, reduce component count and further minimize board space. Applications Clock and data buffering Metallic cable driving FR-4 driving

Also Recommended DS25BR100▲ Offers Equalization And Pre-Emphasis DS25BR110▲ Offers Four Levels Of Equalization DS25BR150▲ 3.125Gbps LVDS Buffer

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

Parameters / Values	DS25BR120	DS25BR100	DS25BR110	DS25BR150
Channels	1 Channels	1 Channels	1 Channels	1 Channels
OUT SigCon	Pre-E	Pre-E
Input Compatibility	LVDS/LVPECL/CML	LVDS/LVPECL/CML	LVDS	LVDS/LVPECL/CML
Output Compatibility	LVDS	LVDS	LVDS	LVDS
Power Consumption_	115 mW	115 mW	115 mW	90 mW
PowerWise Rating 4	37 mW/Gbps	37 mW/Gbps	37 mW/Gbps	29 mW/Gbps
Special Features	7kV ESD	>7kV ESD	7kV ESD	7kV ESD
SupplyVoltage	3.3 Volt	3.3 Volt	3.3 Volt	3.3 Volt
Temperature Min	-40 deg C	-40 deg C	-40 deg C	-40 deg C
Temperature Max	85 deg C	85 deg C	85 deg C	85 deg C
JTAG1149.1	No	No	No	No
Function	Buffer	Buffer	Equalizer	Buffer
PowerWise	Yes	Yes	Yes	Yes
Total Throughput	3125 Mbps	3125 Mbps	3125 Mbps	3125 Mbps
Protocol	Gen. Purpose	Gen. Purpose	Gen. Purpose	Gen. Purpose

Datasheets

Title		Size	Date	Other Language
	DS25BR120 3.125 Gbps LVDS Buffer with Transmit Pre-Emphasis	448 Kbytes	17-May-11

Application Notes

Title		Size	Date	Other Language
	AN-1957: Application Note 1957 LVDS Signal Conditioners Reduce Data-Dependant Jitter	1049 Kbytes	23-Apr-09
	AN-1898: Application Note 1898 LVDS Repeaters and Crosspoints Extend the Reach of FPD-Link II Interfaces	308 Kbytes	4-Sep-08	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
DS25BR120TSD/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1000 AVNET-EM Worldwide 1000 DIGI-KEY Worldwide 2264 FARNELL Europe and Asia 999 MOUSER Worldwide 979 TAYLOR Americas 1000	$2.45 each at 1K+ pcs	reel of 1000
DS25BR120TSDX/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$2.45 each at 1K+ pcs	reel of 4500

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 DS25BR120.

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 DS25BR120 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
DS25BR100EVK/NOPB	DS25BR100EVK Documentation	Preliminary Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 2	$500.00 each	1
Description: 3.125 Gbps LVDS Buffer with pre-emphasis/equalization Contents: Eval Board License agreement Letter with information on downloading users manual

National Semiconductor follows the provisions of the Product Stewardship Guide for Customers (CSP-9-111C1) and Banned Substances and Materials of Interest Specification (CSP-9-111S2) for regulatory environmental compliance. Details may be found at: www.national.com/en/packaging/greennopb.html. Lead free products are RoHS compliant.

Lead Free product status is available through the search tool located here

Part Number(s) (NSID)	Weight (milligrams)	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
DS25BR120TSD/NOPB	20.736	LLP	8	3	260	Detail	N/A	ibis file	ZXYTT 2R120
DS25BR120TSDX/NOPB	20.736	LLP	8	3	260	Detail	N/A	ibis file	ZXYTT 2R120

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 DS25BR120.

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 DS25BR120 is located at RoHS Status.

Design Tools

Title	Size	Date
Use the DS25BR100EVK to evaluate the DS25BR120	9 Kbytes	8-Feb-2012

CAD Symbols and Models N/A

Models ibis file

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
DS25BR120TSD	BICMOS8B+	0	3632	0	0	2762292	2	783807897
DS25BR120TSDX	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 DS25BR120.

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 DS25BR120 is located at RoHS Status.

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