Features DC - 125 MHz / 250 Mbps low jitter, low skew, low power operation Independent Driver Enable pins Outputs Conform to TIA/EIA-899 M-LVDS Standard Controlled transition times minimize reflections Inputs Conform to TIA/EIA-644-A LVDS Standard 8 kV ESD on M-LVDS output pins protects adjoining components Flow-through pinout simplifies PCB layout Industrial operating temperature range (−40°C to +85°C) Available in a space saving SOIC-16 package Description The DS91M125 is a 1:4 M-LVDS repeater designed for driving and distributing clock or data signals to up to four multipoint networks. M-LVDS (Multipoint LVDS) is a new family of bus interface devices based on LVDS technology specifically designed for multipoint and multidrop cable and backplane applications. It differs from standard LVDS in providing increased drive current to handle double terminations that are required in multi-point applications. Controlled transition times minimize reflections that are common in multipoint configurations due to unterminated stubs. A single DS91M125 channel is a 1:4 repeater that accepts M-LVDS/LVDS/CML/LVPECL signals and converts them to M-LVDS signal levels. Each output has an associated independent driver enable pin. The DS91M125 input conforms to the LVDS standard. The DS91M125 has a flow-through pinout for easy PCB layout. It provides a new alternative for high speed multipoint interface applications. It is packaged in a space saving SOIC-16 package. Applications Multidrop / Multipoint clock and data distribution High-Speed, Low Power, Short-Reach alternative to TIA/EIA-485/422 Clock distribution in AdvancedTCA (ATCA) and MicroTCA (μTCA, uTCA) backplanes

Also Recommended DS91M124▲ 1 To 4 M-LVDS Repeater With LVCMOS Input

Typical Application click for larger image	Connection Diagram click for larger image
Typical Performance click for larger image

Parameters / Values	DS91M125	DS91M124
PHY Type	Repeater	Repeater
Family	M-LVDS	M-LVDS
Channels	4 Channels	4 Channels
Max Data Rate	250 Mbps	250 Mbps
Input Compatibility	LVDS	LVCMOS
Output Compatibility	MLVDS	MLVDS
Power Consumption_	221 mW	215 mW
Special Features	Low Skew, 8 kV ESD	Low Skew
SupplyVoltage	3.3 Volt	3.3 Volt
JTAG1149.1	No	No
Temperature Min	-40 deg C	-40 deg C
Temperature Max	85 deg C	85 deg C
Function	1:n Repeater	1:n Repeater

Datasheets

Title		Size	Date	Other Language
	DS91M125 125 MHz 1:4 M-LVDS Repeater with LVDS Input	369 Kbytes	9-Nov-09

Application Notes

Title		Size	Date	Other Language
	AN-1926: Application Note 1926 An Introduction to M-LVDS and Clock and Data Distribution Applications	344 Kbytes	4-Dec-08	中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
DS91M125TMA/NOPB DS91M125TMA RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 48 FARNELL Europe and Asia 112 MOUSER Worldwide 144 NEWARK Americas 78	$2.20 each at 1K+ pcs	rail of 48
DS91M125TMAX/NOPB DS91M125TMAX RoHS Status	SOIC NARROW	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$2.20 each at 1K+ pcs	reel of 2500

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 DS91M125.

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 DS91M125 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
DS91M125EVK/NOPB	DS91M125EVK Documentation	Preliminary Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$195.00 each	1
Description: The DS91M125EVK is an evaluation board design for demonstration of all features and functions of the DS91M125. The board enables users to examine performance and all functions of the DS91M125 as a standalone device. The DS91M125 is a high-speed 1:4 M-LVDS repeater with a LVDS input designed for multipoint applications with multiple drivers or receivers. The device conforms to TIA/EIA-899 standard. It utilizes M-LVDS technology for low power, high-speed and superior noise immunity. Documentation: DS91M125EVK User Manual DS91M125EVK Gerber Files Links: DS91M125 Product Folder DS91D176EVK An evaluation kit that enables users to explore M-LVDS performance in ATCA (AdvancedTCA) clock distribution networks DS91M040EVK Another evaluation kit that enables users to explore M-LVDS performance in ATCA (AdvancedTCA) clock distribution networks national.com/LVDS Featured community

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
DS91M125TMA/NOPB DS91M125TMA	139.49 140	SOIC NARROW	16	1 1	260 235	Detail	Download	ibis file	NSUZXYTTE# DS91M125 TMA
DS91M125TMAX/NOPB DS91M125TMAX	139.49 140	SOIC NARROW	16	1 1	260 235	Detail	Download	ibis file	NSUZXYTTE# DS91M125 TMA

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 DS91M125.

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 DS91M125 is located at RoHS Status.

CAD Symbols and Models Download DS91M125 CAD Symbols

Models ibis file

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
DS91M125TMA	CMOS7	0	21301	0	0	1584000	3	449464325
DS91M125TMAX	CMOS7	0	21301	0	0	1584000	3	449464325

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 DS91M125.

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 DS91M125 is located at RoHS Status.