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SN65HVD1781DG4 Datasheet(PDF) 2 Page - Texas Instruments

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Part # SN65HVD1781DG4
Description  70-V Fault-Protected RS-485 Transceivers
Download  15 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

SN65HVD1781DG4 Datasheet(HTML) 2 Page - Texas Instruments

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R
RE
DE
D
V
CC
B
A
GND
1
2
3
4
8
7
6
5
S0299-02
1
2
3
4
6
7
A
B
R
RE
DE
D
Bus
DEVICE INFORMATION
SN65HVD1780
SN65HVD1781
SN65HVD1782
SLLS877D – DECEMBER 2007 – REVISED AUGUST 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.
D Package
LOGIC DIAGRAM (POSITIVE LOGIC)
(Top View)
DRIVER FUNCTION TABLE
Input
Enable
Outputs
Driver State
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 (1)
X
OPEN
Z
Z
Driver disabled by default (1)
OPEN
H
H
L
Actively drive bus High by default
(1)
When both the driver and receiver are disabled, the device enters a low-power standby mode.
RECEIVER FUNCTION TABLE
Differential Input
Enable
Output
Receiver State
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 (1)
X
OPEN
Z
Receiver disabled by default (1)
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
(1)
When both the driver and receiver are disabled, the device enters a low-power standby mode.
2
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Copyright © 2007–2008, Texas Instruments Incorporated
Product Folder Link(s): SN65HVD1780 SN65HVD1781 SN65HVD1782


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