SN65LVDS1, SN65LVDS2, SN65LVDT2

SLLS373L – JULY 1999 – REVISED DECEMBER 2014

www.ti.com

11 Power Supply Recommendations

The LVDS driver and receivers in this data sheet are designed to operate from a single power supply. Both

drivers and receivers operate with supply voltages in the range of 2.4 V to 3.6 V. In a typical application, a driver

and a receiver may be on separate boards, or even separate equipment. In these cases, separate supplies

would be used at each location. The expected ground potential difference between the driver power supply and

the receiver power supply would be less than |±1 V|. Board level and local device level bypass capacitance

should be used and are covered in Driver Bypass Capacitance and Receiver Bypass Capacitance.

12 Layout

12.1 Layout Guidelines

12.1.1 Microstrip vs. Stripline Topologies

As per SLLD009, printed-circuit boards usually offer designers two transmission line options: Microstrip and

stripline. Microstrips are traces on the outer layer of a PCB, as shown in Figure 24.

Figure 24. Microstrip Topology

On the other hand, striplines are traces between two ground planes. Striplines are less prone to emissions and

susceptibility problems because the reference planes effectively shield the embedded traces. However, from the

standpoint of high-speed transmission, juxtaposing two planes creates additional capacitance. TI recommends

routing LVDS signals on microstrip transmission lines, if possible. The PCB traces allow designers to specify the

(1) (2) (3)

Figure 25. Stripline Topology

(1)

Howard Johnson & Martin Graham.1993. High Speed Digital Design – A Handbook of Black Magic. Prentice Hall PRT. ISBN number

013395724.

(2)

Mark I. Montrose. 1996. Printed Circuit Board Design Techniques for EMC Compliance. IEEE Press. ISBN number 0780311310.

(3)

Clyde F. Coombs, Jr. Ed, Printed Circuits Handbook, McGraw Hill, ISBN number 0070127549.

26

Submit Documentation Feedback

Copyright © 1999–2014, Texas Instruments Incorporated

Product Folder Links: SN65LVDS1 SN65LVDS2 SN65LVDT2