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ISOW1432

更新时间： 2024-11-19 02:50:23
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ISOW14x2 Isolated RS-485/RS-422 Transceiver with Integrated Low-Emissions, Low-Noise, High-Efficiency DC-DC Converter

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ISOW1412, ISOW1432  
SLLSF86B – MAY 2018 – REVISED OCTOBER 2021  
ISOW14x2 Isolated RS-485/RS-422 Transceiver with Integrated Low-Emissions, Low-  
Noise, High-Efficiency DC-DC Converter  
– UL 1577 component recognition program  
– IEC 62368-1, IEC 61010-1, IEC 60601-1 and  
1 Features  
•
Meets or exceeds the requirements of the TIA/  
EIA-485A standard  
Data rates  
GB 4943.1-2011 certifications  
2 Applications  
•
•
•
•
•
•
Factory automation  
Building automation  
Industrial transport  
Solar inverters, protection relay  
Motor drives  
– ISOW1412 : 500 kbps  
– ISOW1432 : 12 Mbps  
Integrated low-emissions DC-DC converter with  
low-emissions, low-noise  
– Meets CISPR 32 Class B and EN 55032 Class  
B with margin on a two-layer PCB  
– Low frequency power converter at 25 MHz  
enabling low noise performance  
Additional 2 Mbps GPIO channel  
High efficiency output power  
•
3 Description  
The ISOW14x2 devices are galvanically-isolated  
RS-485/RS-422 transceivers with a built-in isolated  
DC-DC converter, that eliminates the need for a  
separate isolated power supply in space constrained  
isolated designs. The low-emissions, isolated DC-  
DC converter meets CISPR 32 radiated emissions  
Class B standard with just two ferrite beads on  
a simple two-layer PCB. Additional 20 mA output  
current can be used to power other circuits on the  
board. An integrated 2 Mbps GPIO channel helps  
remove any additional digital isolator or optocoupler  
for diagnotstics, LED indication or supply monitoring.  
•
•
– Typical efficiency: 46%  
– VISOOUT accuracy: ±5%  
– Additional output current: 20 mA  
Independent power supply for RS-485 & DC-DC  
– Logic supply (VIO): 1.71 V to 5.5 V  
– Power converter supply ( VDD): 3 V to 5.5 V  
RS-485 with PROFIBUS compatibility  
– Open, short, and idle bus failsafe  
– 1/8 unit load: up to 256 nodes on bus  
– Glitch-free power up and power down  
Reinforced and Basic isolation options  
High CMTI: 100-kV/µs (typical)  
High ESD bus protection  
– HBM: ±16 kV  
– IEC 61000-4-2 contact discharge: ±8 kV  
Operating temperature range: -40°C to 125°C  
Current limit and thermal shutdown  
20-pin wide SOIC package  
•
•
Device Information  
ISOW1412  
ISOW1432  
ISOW1412B  
ISOW1432B  
•
•
•
FEATURE  
Protection Level  
Surge Test Voltage  
Isolation Rating  
Working Voltage  
Package(1)  
Reinforced  
10 kVPK  
Basic  
7.8 kVPK  
5000 VRMS  
5000 VRMS  
•
•
•
1000 VRMS/1500VPK 1000 VRMS/1500VPK  
DFM (20)  
DFM (20)  
Body Size  
12.83mm x 7.5mm  
12.83mm x 7.5mm  
•
Section 8.6:  
(1) For all available packages, see the orderable addendum at  
the end of the data sheet.  
– VDE reinforced and basic insulation per DIN  
VDE V 0884-11:2017-01  
VCC  
VIO  
VISOIN  
Must be connected on PCB,  
not connected internally  
DE  
Y
D
Signal  
R
Signal  
Isolation  
Z
RS485  
RS485 Bus  
B
MCU  
Isolation  
RE  
A
GISOIN  
GNDIO  
VISOOUT  
GND2  
DC-DC  
Primary  
DC-DC  
Secondary  
VDD  
GND1  
Galvanic Isolation  
Barrier  
Simplified Schematic  
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,  
intellectual property matters and other important disclaimers. UNLESS OTHERWISE NOTED, this document contains PRODUCTION  
DATA.  
 
 
 
 
 
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