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ISL32433EIBZ Scheda tecnica(PDF) 1 Page - Intersil Corporation

Il numero della parte ISL32433EIBZ
Spiegazioni elettronici  짹40V Fault Protected, 3.3V to 5V, 짹15V Common Mode Range, RS-485/RS-422 Transceivers With Cable Invert and 짹15kV ESD
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Produttore elettronici  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL32433EIBZ Scheda tecnica(HTML) 1 Page - Intersil Corporation

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1
±40V Fault Protected, 3.3V to 5V, ±15V Common Mode
Range, RS-485/RS-422 Transceivers With Cable Invert
and ±15kV ESD
ISL32430E, ISL32432E, ISL32433E, ISL32435E, ISL32437E
The ISL32430E through ISL32437E are 3.3V to 5V powered, fault
protected, extended common mode range differential transceivers
for balanced communication. The RS-485 bus pins (driver outputs
and receiver inputs) are protected against overvoltages up to
±40V, and against ±15kV ESD strikes. Additionally, these
transceivers operate in environments with common mode
voltages up to ±15V (exceeds the RS-485 requirement), making
this RS-485 family one of the more robust on the market.
Transmitters are RS-485 compliant with VCC ≥ 4.5V and deliver a
1.1V differential output voltage into the RS-485 specified 54Ω
load even with VCC =3V.
Receiver (Rx) inputs feature a “Full Fail-Safe” design, which
ensures a logic high Rx output if Rx inputs are floating, shorted, or
on a terminated but undriven (idle) bus. Rx full fail-safe operation
is maintained even when the Rx input polarity is switched (cable
invert function on ISL32437E).
The ISL32437E includes a cable invert function that reverses the
polarity of the Rx and Tx bus pins in case the cable is
misconnected during installation.
See Table 1 on page 2 for key features and configurations by
device number.
Related Literature
•See FN7921, “ISL32450E, ISL32452E, ISL32453E,
ISL32455E, ISL32457E: ±60V Fault Protected, 3.3V to 5V,
±20V Common Mode Range, RS-485/RS-422 Transceivers
with Cable Invert and ±15kV ESD”
Features
• Fault Protected RS-485 Bus Pins . . . . . . . . . . . . . . up to ±40V
• Extended Common Mode Range . . . . . . . . . . . . . . . . . . . ±15V
Larger Than Required for RS-485
• ±15kV HBM ESD Protection on RS-485 Bus Pins
• Wide Supply Range . . . . . . . . . . . . . . . . . . . . . . . . . 3V to 5.5V
• Cable Invert Pin (ISL32437E Only)
Corrects for Reversed Cable Connections While Maintaining Rx
Full Fail-safe Functionality
• 1/4 Unit Load for up to 128 Devices on the Bus
• High Transient Overvoltage Tolerance . . . . . . . . . . . . . . . ±60V
• Full Fail-safe (Open, Short, Terminated) RS-485 Receivers
• Choice of RS-485 Data Rates . . . . . . . . . . . . 250kbps or 1Mbps
• Low Quiescent Supply Current . . . . . . . . . . . . . . . . . . . 2.1mA
Ultra Low Shutdown Supply Current . . . . . . . . . . . . . . . 10µA
• Pb-Free (RoHS Compliant)
Applications
• Utility Meters/Automated Meter Reading Systems
• Air Conditioning Systems
•Security Camera Networks
• Building Lighting and Environmental Control Systems
• Industrial/Process Control Networks
FIGURE 1. EXCEPTIONAL ISL32433E RX OPERATES AT >1Mbps
EVEN WITH ±15V COMMON MODE VOLTAGE
FIGURE 2. TRANSCEIVERS DELIVER SUPERIOR COMMON MODE
RANGE vs STANDARD RS-485 DEVICES
TIME (200ns/DIV)
0
5
10
15
20
B
VID = ±1V
A
RO
VCC = 3V
2Mbps
ISL3243XE
STANDARD RS-485
TRANSCEIVER
-15
-7
0
12
15
March 1, 2012
FN7920.0
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|Copyright Intersil Americas Inc. 2012. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.


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