Datasheet
April 14, 2008
Rev. 1.0 © 2008, National Semiconductor Corp.
2
Overview
The purpose of this document is to familiarize you with the DS91M040 evaluation board, suggest the test setup
procedures and instrumentation, and to guide you through some typical measurements that will demonstrate the
performance of the device.
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.
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.
Description
Figure 1 below represents the top layer drawing of the board with the silkscreen annotations. It is a 4 x 3 inch
10 layer printed circuit board (PCB) that features two DS91M040 (U1-U2) devices.
R1
D1
R2
D2
R3
D3
R0
D0
R1
D1
R0
D0
DE
RE*
FSEN1
FSEN2
MDE
R2
D2
R3
D3
DE
RE*
FSEN1
FSEN2
MDE
Figure 1 - DS91M040EVK Top View Drawing