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Exar - TIA-485/TIA-422 Transceiver

Numéro de référence XR33053
Description TIA-485/TIA-422 Transceiver
Fabricant Exar 
Logo Exar 





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XR33053 fiche technique
XR33053
±60V Fault Tolerant 3.0V to 5.5V
TIA-485/TIA-422 Transceiver
Description
The XR33053 is a high performance TIA-485/TIA-422 device
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 receiver includes full fail-safe circuitry, guaranteeing a logic-
high receiver output when the receiver inputs are open, shorted or
undriven. The XR33053 receiver input impedance is at least 120kΩ
(1/10 unit load), allowing more than 320 devices on the bus.
The driver is protected by short circuit detection as well as thermal
shutdown and maintains high impedance in shutdown or when
powered off.
The DE and RE pins include hot swap circuitry to prevent false
transitions on the bus during powerup 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)
■■ 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 14-pin NSOIC package
■■ -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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