DS91D176 Datasheet, PDF (12/13 Pages) National Semiconductor (TI) – Multipoint-LVDS (M-LVDS) Transceivers

Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
Name
R
RE
DE
D
GND
A
B
V_CC
Description
Receiver output pin
Receiver enable pin: When RE is high, the receiver is disabled.
When RE is low or open, the receiver is enabled.
Driver enable pin: When DE is low, the driver is disabled. When
DE is high, the driver is enabled.
Driver input pin
Ground pin
Non-inverting driver output pin/Non-inverting receiver input pin
Inverting driver output pin/Inverting receiver input pin
Power supply pin, +3.3V ± 0.3V
Application Information
STUB LENGTH
Stub lengths should be kept to a minimum. For a general
approximation, if the electrical length of a trace is greater
than 1/5 of the transition edge, then the trace is considered
a transmission line. If the velocity equals 160 ps per inch for
Typical Performance Characteristics
a typical loaded backplane, then the maximum stub length is
312 ps/160 ps/inch or 1.95 inches (approximately 2 inches).
To determine the maximum stub for your backplane, the
propagation velocity for the backplane is required (refer to
application notes AN-905 and AN-808).
Supply Current vs. Frequency
Output VOD vs. Load Resistance
20024662
Supply Current measured using a clock pattern with driver terminated to
50ohms . V_CC = 3.3V, T_A = +25˚C.
V_CC = 3.3V, T_A = +25˚C
FIGURE 15. SOIC performance Characteristics
20024663
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