Features DC - 125 MHz / 250 Mbps low jitter, low skew, low power operation Wide Input Common Mode Voltage Range allows up to ±1V of GND noise Conforms to TIA/EIA-899 M-LVDS Standard Pin selectable M-LVDS receiver type (1 or 2) Controlled transition times (2.0 ns typ) minimize reflections 8 kV ESD on M-LVDS I/O pins protects adjoining components Flow-through pinout simplifies PCB layout Small 5 mm x 5 mm LLP-32 space saving package Description The DS91M040 is a quad M-LVDS transceiver designed for driving / receiving clock or data signals to / from 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. M-LVDS devices also have a very large input common mode voltage range for additional noise margin in heavily loaded and noisy backplane environments. A single DS91M040 channel is a half-duplex transceiver that accepts LVTTL/LVCMOS signals at the driver inputs and converts them to differential M-LVDS signal levels. The receiver inputs accept low voltage differential signals (LVDS, BLVDS, M-LVDS, LVPECL and CML) and convert them to 3V LVCMOS signals. The DS91M040 supports both M-LVDS type 1 and type 2 receiver inputs. 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

Example Multidrop Backplane

Typical Application *click for larger image Example Multidrop Backplane	Block Diagram *click for larger image
Typical Performance *click for larger image Vod stays Constant over the load range of Interest

Parameters Values PHY Type Transceiver Family M-LVDS Channels 4 Channels Max Data Rate 250 Mbps Input Compatibility LVTTL/MLVDS Output Compatibility LVTTL/MLVDS Power Consumption_ 330 mW Special Features Type 1 or 2 RX SupplyVoltage 3.3 Volt JTAG1149.1 No Temperature Min -40 deg C Temperature Max 85 deg C Function Transceiver

Datasheets

Title		Size	Date	Other Language
	DS91M040 125 MHz Quad M-LVDS Transceiver	419 Kbytes	9-Nov-09	日本語

Application Notes

Title		Size	Date	Other Language
	AN-1503: Application Note 1503 Designing an ATCA Compliant M-LVDS Clock Distribution Network	2926 Kbytes	20-Nov-07	日本語 中文

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
DS91M040TSQ/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1026 AVNET-EM Worldwide 1000 DIGI-KEY Worldwide 1370 FARNELL Europe and Asia 222 MOUSER Worldwide 933 NEWARK Americas 212 TAYLOR Americas 1026	$3.79 each at 1K+ pcs	reel of 1000
DS91M040TSQE/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 250 AVNET-EM Worldwide 332 DIGI-KEY Worldwide 0 FARNELL Europe and Asia 548 MOUSER Worldwide 250 NEWARK Americas 88 TAYLOR Americas 250	$3.79 each at 1K+ pcs	reel of 250
DS91M040TSQX/NOPB RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGI-KEY Worldwide 0	$3.79 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 DS91M040.

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 DS91M040 is located at RoHS Status.

Part Number(s) (NSID)	Description	Availability	Current Reported Stock	Budgetary Pricing	Pack Size
DS91M040EVK/NOPB	DS91M040EVK Documentation	Preliminary Lead Free (RoHS)	Distributor Region Qty DIGI-KEY Worldwide 0 MOUSER Worldwide 1	$125.00 each	1
Overview: The DS91M040EVK is an evaluation board design for demonstration of all features and functions of the DS91M040. The DS91M040 is a high-speed quad M-LVDS differential transceiver 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. The primary function of the board is to assist system designers in development and analysis of M-LVDS clock distribution networks in ATCA backplanes. The board also enables the user to examine performance and all functions of the DS91M040 as a standalone device or in a point-to-point configuration. Documentation: DS91M040EVK User Manual DS91M040EVK Gerber Files LVDS.NATIONAL.COM 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
DS91M040TSQ/NOPB	60.581	LLP	32	3	260	Detail	Download	ibis file	NS UZXYTT M040TS
DS91M040TSQE/NOPB	60.581	LLP	32	3	260	Detail	Download	ibis file	NS UZXYTT M040TS
DS91M040TSQX/NOPB	60.581	LLP	32	3	260	Detail	Download	ibis file	NS UZXYTT M040TS

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 DS91M040.

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 DS91M040 is located at RoHS Status.

CAD Symbols and Models Download DS91M040 CAD Symbols

Models ibis file

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
DS91M040TSQ	CMOS7	0	21301	0	0	1584000	3	449464325
DS91M040TSQE	CMOS7	0	21301	0	0	1584000	3	449464325
DS91M040TSQX	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 DS91M040.

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 DS91M040 is located at RoHS Status.