ULTRA HIGH SPEED RS-485/RS-422 PROFIBUS TRANSCEIVERS WITH 1/8TH UNIT LOAD
AND +/-15KV ESD-PROTECTION
OCTOBER 2010
REV. 1.0.0
XR5486E-5488E
GENERAL DESCRIPTION
The
XR5486E-XR5488E
family of RS-485 devices
are designed for reliable, bidirectional communication
on multipoint bus transmission lines. Each device
contains one differential driver and one differential
receiver. XR5488E is a half-duplex device while the
other part numbers are full-duplex. All devices comply
with TIA/EIA-485 and TIA/EIA-422 standards. Lead-
free and RoHS compliant packages are available for
all models.
These devices are ruggedized for use in harsh
operating conditions over the entire common mode
voltage range from -7V to +12V. Receivers are
specially designed to fail-safe to a logic high output
state if the inputs are left un-driven or shorted. All RS-
485 bus-pins are protected against severe ESD
events up to +/-15kV Air-Gap (IEC-61000-4-2), up to
+/-8kV Contact Discharge (IEC-61000-4-2) and up to
+/-15kV Human body Model. Drivers are protected
from excess current flow caused by bus contention or
output short-circuits by both an internal current limit
and a thermal-overload shutdown. Devices are rated
for Industrial (-40°C to +85°C) operating
temperatures. Receivers have exceptionally high
input impedance, which places only 1/8th the
standard load on a bus. Up to 256 transceivers may
coexist while preserving full signal margin.
All devices operate from a single 5.0V power supply
and draw negligible quiescent power. All versions
except the XR5487E may independently enable and
disable their driver and receiver and enter a low
power shutdown mode if both driver and receiver are
disabled. All outputs maintain high impedance in
shutdown or when powered-off.
FEATURES
•
5.0V Single Supply Operation
•
High Speed up to 52Mbps
•
Advanced Fail-safe Receiver Inputs
•
Hot Swap glitch protection on control inputs
•
Robust ESD Protection for RS-485 pins
■
■
■
+/-15kV Air-Gap Discharge
+/-15kV Human Body Model
+/-8kV Contact Discharge
•
1/8th Unit Load, 256 transceivers on bus
•
Driver short circuit current limit and thermal
shutdown for overload protection
•
Low Current 1
μ
A shutdown mode (except
XR5487E)
•
Industry standard package footprints
TYPICAL APPLICATIONS
•
Motor Control
•
Building Automation
•
Security Systems
•
Remote Utility Meter Reading
F
IGURE
1. T
YPICAL
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XR5488E
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XR5488E
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STUB
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T
DI
A
RO
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XR5488E
A
XR5488E
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A
A
RO
RE
DE
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RE DE
DI
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Exar
Corporation 48720 Kato Road, Fremont CA, 94538
•
(510) 668-7000
•
FAX (510) 668-7017
•
www.exar.com
EXAR [ EXAR CORPORATION ]
