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SN65HVD1787DG4 Datasheet(PDF) 2 Page - Texas Instruments

Part # SN65HVD1787DG4
Description  70-V Fault-Protected RS-485 Transceivers
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN65HVD1787DG4 Datasheet(HTML) 2 Page - Texas Instruments

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background image
R
RE
DE
D
V
CC
B
A
GND
SN65HVD1785,1786,1787
DorP Package
(TopView)
1
2
3
4
8
7
6
5
P0066-02
1
2
3
4
5
6
7
14
13
12
11
10
9
8
NC
GND
GND
Z
Y
NC
R
RE
DE
D
V
CC
V
CC
A
B
SN65HVD1791,1792,1793
DPackage
(TopView)
P0005-02
NC-Nointernalconnection
LogicDiagram(PositiveLogic)
S0299-01
1
2
3
4
6
7
A
B
R
RE
DE
D
Bus
LogicDiagram(PositiveLogic)
2
3
4
5
12
10
9
11
A
Z
Y
B
R
RE
DE
D
S0300-01
DEVICE INFORMATION
SN65HVD1785, SN65HVD1786
SN65HVD1787, SN65HVD1791
SN65HVD1792, SN65HVD1793
SLLS872E – JANUARY 2008 – REVISED JULY 2008 ....................................................................................................................................................... www.ti.com
These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam
during storage or handling to prevent electrostatic damage to the MOS gates.
DRIVER FUNCTION TABLE
Input
Enable
Outputs
D
DE
A
B
H
H
H
L
Actively drive bus High
L
H
L
H
Actively drive bus Low
X
L
Z
Z
Driver disabled
X
OPEN
Z
Z
Driver disabled by default
OPEN
H
H
L
Actively drive bus High by default
RECEIVER FUNCTION TABLE
Differential Input
Enable
Output
VID = VA – VB
RE
R
VIT+ < VID
L
H
Receive valid bus High
VIT– < VID < VIT+
L
?
Indeterminate bus state
VID < VIT–
L
L
Receive valid bus Low
X
H
Z
Receiver disabled
X
OPEN
Z
Receiver disabled by default
Open-circuit bus
L
H
Fail-safe high output
Short-circuit bus
L
H
Fail-safe high output
Idle (terminated) bus
L
H
Fail-safe high output
2
Submit Documentation Feedback
Copyright © 2008, Texas Instruments Incorporated
Product Folder Link(s): SN65HVD1785, SN65HVD1786 SN65HVD1787, SN65HVD1791 SN65HVD1792, SN65HVD1793


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