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SLOS581C – MAY 2008 – REVISED OCTOBER 2009
ISOLATED 5-V FULL AND HALF-DUPLEX RS-485 TRANSCEIVERS
Check for Samples:
1
FEATURES
4000-V
PEAK
Isolation, 560-V
peak
V
IORM
– UL 1577, IEC 60747-5-2 (VDE 0884, Rev. 2),
IEC 61010-1, IEC 60950-1 and CSA
Approved
Bus-Pin ESD Protection
– 16 kV HBM Between Bus Pins and GND2
– 6 kV HBM Between Bus Pins and GND1
1/8 Unit Load – Up to 256 Nodes on a Bus
Meets or Exceeds TIA/EIA RS-485
Requirements
Signaling Rates up to 20 Mbps
Thermal Shutdown Protection
Low Bus Capacitance – 16 pF (Typ)
50 kV/μs Typical Transient Immunity
Fail-safe Receiver for Bus Open, Short, Idle
3.3-V Inputs are 5-V Tolerant
APPLICATIONS
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Security Systems
Chemical Production
Factory Automation
Motor/Motion Control
HVAC and Building Automation Networks
Networked Security Stations
ISO3080
ISO3086
ISO3082
ISO3088
Full-Duplex
Full-Duplex
Half-Duplex
Half-Duplex
200 kbps
20 Mbps
200 kbps
20 Mbps
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DESCRIPTION
The ISO3080, and ISO3086 are isolated full-duplex differential line drivers and receivers while the ISO3082, and
ISO3088 are isolated half-duplex differential line transceivers for TIA/EIA 485/422 applications.
These devices are ideal for long transmission lines since the ground loop is broken to allow for a much larger
common-mode voltage range. The symmetrical isolation barrier of the device is tested to provide 2500 Vrms of
isolation for 60s between the bus-line transceiver and the logic-level interface.
Any cabled I/O can be subjected to electrical noise transients from various sources. These noise transients can
cause damage to the transceiver and/or near-by sensitive circuitry if they are of sufficient magnitude and
duration. These isolated devices can significantly increase protection and reduce the risk of damage to
expensive control circuits.
The ISO3080, SO3082, ISO3086 and ISO3088 are qualified for use from –40°C to 85°C.
ISO3080, ISO3086
DW PACKAGE
Vcc1
GND1
R
RE
DE
D
GND1
GND1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
Vcc2
GND2
A
B
Z
Y
GND2
GND2
R
ISO3082, ISO3088
DW PACKAGE
Vcc1
GND1
R
RE
DE
D
GND1
GND1
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
function diagram
GALVANIC ISOLATIO N
14
13
A
B
Z
Y
function diagram
5
Vcc2
DE
GND2
nc
6
D
B
3
A
R
4
nc
RE
GND2
GALVANIC ISOLATION
RE
DE 5
3
4
13
12
B
A
12
11
D
6
GND2
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2008–2009, Texas Instruments Incorporated
TI [ TEXAS INSTRUMENTS ]
