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Exar - TIA-485/TIA-422 Transceivers

Numéro de référence XR33152
Description TIA-485/TIA-422 Transceivers
Fabricant Exar 
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XR33152 fiche technique
XR33152/56/58
±60V Fault Tolerant 3.0V to 5.5V
TIA-485/TIA-422 Transceivers
Description
The XR33152, XR33156 and XR33158 family of high performance
TIA-485/TIA-422 devices are designed for improved performance
in noisy industrial environments and increased tolerance to system
faults.
The analog bus pins can withstand direct shorts up to ±60V and are
protected against ESD events up to ±15kV HBM. An extended ±25V
common mode operating range allows for more reliable operation in
noisy environments.
The receivers include full fail-safe circuitry, guaranteeing a logic
high receiver output when the receiver inputs are open, shorted
or undriven. The XR33152 receiver input impedance is at least
120kΩ (1/10 unit load), allowing more than 320 devices on the bus.
The XR33156/58 receiver input impedance is at least 30kΩ (1/2.5
unit load), allowing more than 80 devices on the bus.
The drivers are protected by short circuit detection as well as thermal
shutdown and maintain high impedance in shutdown or when powered
off. The XR33152 driver is slew limited for reduced EMI and error-free
communication over long or unterminated data cables.
The XR33152/56/58 family of high performance TIA-485/TIA-422
devices are designed for improved performance in noisy industrial
environments and increased tolerance to system faults.
The devices with DE and RE pins include hot swap circuitry to prevent
false transitions on the bus during power up or live insertion and can
enter a 1nA low current shutdown mode for extreme power savings.
FEATURES
■■ 3.0V to 5.5V operation
■■ ±60V fault tolerance on analog bus pins
■■ Extended ±25V common mode operation
■■ Robust ESD protection:
±15kV HBM (bus pins)
± 4kV HBM (non-bus pins)
■■ 1.65V to 5.5V logic Interface VL pin
(full-duplex package option)
■■ Invert control to correct for reversed
bus pins
■■ Enhanced receiver fail-safe protection for
open, shorted or terminated but idle
data lines
■■ Hot swap glitch protection on DE and
RE pins
■■ Driver short-circuit current limit and
thermal shutdown for overload protection
■■ Reduced unit loads allows up to 320
devices on bus
■■ Industry standard 8 and 14-pin
NSOIC packages
■■ -40°C to 85°C ambient operating
temperature range
APPLICATIONS
■■ Industrial control networks
■■ HVAC networks
■■ Building and process automation
■■ Remote utility meter reading
■■ Energy monitoring and control
■■ Long or unterminated transmission lines
Typical Application
5V
VCC
DI
DE
R
RE
FAULT TOLERANT UP TO 60V
60V POWER BUS
5V
VCC
R
RE
DI
DE
Figure 1. Typical Application
REV1A
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XR33158 TIA-485/TIA-422 Transceivers Exar
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