Datasheet

HewlettPackardHP6624A
DCPowerSupply
BenchTestBoard
AgilentParBERT
(E4832A)
TektronixTDS6604
DigitalStorageScope
Rt = 100 Ω (Typ)
300 kΩ 300 kΩ
V
CC
V
IT
≈ 2.3 V
A
B
Y
SN65LVDS386/388A/390, SN65LVDT386/388A/390
SN75LVDS386/388A/390, SN75LVDT386/388A/390
SLLS394H –SEPTEMBER 1999–REVISED MAY 2007 www.ti.com
Figure 13. Open-Circuit Fail Safe of the LVDS Receiver
It is only under these conditions that the output of the receiver is valid with less than a 100-mV differential input
voltage magnitude. The presence of the termination resistor, Rt, does not affect the fail-safe function as long as it
is connected as shown in the figure. Other termination circuits may allow a dc current to ground that could defeat
the pullup currents from the receiver and the fail-safe feature.
EQUIPMENT
• Hewlett Packard HP6624A DC power supply
• Tektronix TDS6604 Digital Storage Scope
• Agilent ParBERT E4832A
Figure 14. Equipment Setup
12 Submit Documentation Feedback Copyright © 1999–2007, Texas Instruments Incorporated
Product Folder Links: SN65LVDS386/388A/390 SN65LVDT386/388A/390 SN75LVDS386/388A/390
SN75LVDT386/388A/390