Datasheet

R
INV
DE
D
V
CC
B
A
GND
DPackage
(TopView)
1
2
3
4
8
7
6
5
1
2
3
4
5
6
7
14
13
12
11
10
9
8
RINV
GND
GND
Z
Y
DINV
R
RE
DE
D
V
CC
V
CC
A
B
DPackage
(TopView)
P0066-04
3
4
1
2
6
7
A
B
R
DE
D
INV
S0311-01
4
5
8
2
3
1
9
10
11
12
Y
Z
B
A
R
DE
D
DINV
RE
RINV
SN65HVD1785, SN65HVD1786
SN65HVD1787, SN65HVD1791
SN65HVD1792, SN65HVD1793
www.ti.com SLLS872H –JANUARY 2008–REVISED FEBRUARY 2010
Figure 15. SN65HVD17xx Options With Inverting Feature to Correct for Miswired Cables
APPLICATION INFORMATION
Hot-Plugging
These devices are designed to operate in "hot swap" or "hot pluggable" applications. Key features for
hot-pluggable applications are power-up, power-down glitch free operation, default disabled input/output pins,
and receiver failsafe. As shown in Figure 9, an internal Power-On Reset circuit keeps the driver outputs in a
high-impedance state until the supply voltage has reached a level at which the device will reliably operate. This
ensures that no spurious transitions (glitches) will occur on the bus pin outputs as the power supply turns on or
turns off.
As shown in the device FUNCTION TABLE, the ENABLE inputs have the feature of default disable on both the
driver enable and receiver enable. This ensures that the device will neither drive the bus nor report data on the
R pin until the associated controller actively drives the enable pins.
Copyright © 2008–2010, Texas Instruments Incorporated Submit Documentation Feedback 13
Product Folder Link(s): SN65HVD1785, SN65HVD1786 SN65HVD1787, SN65HVD1791 SN65HVD1792, SN65HVD1793