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ISO15_08 Datasheet, PDF (1/20 Pages) Texas Instruments – ISOLATED 3.3-V FULL AND HALF-DUPLEX RS-485 TRANSCEIVERS
ISO15
ISO35
www.ti.com................................................................................................................................................................ SLOS580B – MAY 2008 – REVISED JULY 2008
ISOLATED 3.3-V FULL AND HALF-DUPLEX RS-485 TRANSCEIVERS
FEATURES
1
• 4000-VPEAK Isolation, 560-Vpeak VIORM
UL 1577, IEC 60747-5-2 (VDE 0884, Rev 2)
• 1/8 Unit Load – Up to 256 Nodes on a Bus
• Meets or Exceeds TIA/EIA RS-485
Requirements
• Signaling Rates up to 1 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
• Security Systems
• Chemical Production
• Factory Automation
• Motor/motion Control
• HVAC and Building Automation Networks
• Networked Security Stations
DESCRIPTION
The ISO15 is an isolated half-duplex differential line transceiver while the ISO35 is an isolated full-duplex
differential line driver and receiver 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 ISO15 and ISO35 are qualified for use from –40°C to 85°C.
DW PACKAGE
function diagram
Vcc1 1
GND1 2
R3
RE 4
DE 5
D6
GND1 7
GND1 8
16 Vcc2
15 GND2
14 A
13 B
R3
4
RE
12 Z
DE 5
11 Y
10
9
GND2
GND2
D6
14
A
13 B
12 Z
11
Y
DW PACKAGE
function diagram
Vcc1 1
GND1 2
R3
RE 4
DE 5
D6
GND1 7
GND1 8
16 Vcc2
5
15 GND2 DE
14 nc
13 B
6
D
12 A
11 nc
R3
10 GND2 RE 4
9 GND2
13
B
12
A
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, Texas Instruments Incorporated
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