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ISL31493E Folha de dados(PDF) 1 Page - Intersil Corporation

Nome de Peças ISL31493E
Descrição Electrónicos  짹60V Fault Protected, 5V, RS-485/RS-422 Transceivers with 짹25V Common Mode Range
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Fabricante Electrônico  INTERSIL [Intersil Corporation]
Página de início  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL31493E Folha de dados(HTML) 1 Page - Intersil Corporation

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±60V Fault Protected, 5V, RS-485/RS-422
Transceivers with ±25V Common Mode Range
ISL31490E, ISL31491E, ISL31492E, ISL31493E, ISL31495E,
ISL31496E, ISL31498E
The ISL31490E, ISL31491E, ISL31492E, ISL31493E,
ISL31495E, ISL31496E, ISL31498E are fault protected,
5V powered, differential transceivers that exceed the
RS-485 and RS-422 standards for balanced
communication. The RS-485 transceiver pins (driver
outputs and receiver inputs) are protected against faults
up to ±60V. Additionally, the extended common mode
range allows these transceivers to operate in
environments with common mode voltages up to ±25V
(>2x the RS-485 requirement), making this RS-485
family one of the most robust on the market.
Transmitters deliver an exceptional 2.5V (typical)
differential output voltage into the RS-485 specified 54Ω
load. This yields better noise immunity than standard
RS-485 ICs, or allows up to six 120Ω terminations in star
network topologies.
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 outputs have high drive levels - typically 15mA
@ VOL = 1V (for opto-coupled, isolated applications).
Half duplex (Rx inputs and Tx outputs multiplexed
together) and full duplex pinouts are available. See
Table 1 on page 2 for key features and configurations by
device number.
For fault protected or wide common mode range devices
with cable invert (polarity reversal) or logic supply (VL)
pins, please see the ISL31480E data sheet.
Features
• Fault Protected RS-485 Bus Pins. . . . . . Up to ±60V
• Extended Common Mode Range . . . . . . . . . . .±25V
More than Twice the Range Required for RS-485
• 1/4 Unit Load for up to 128 Devices on the Bus
• High Transient Overvoltage Tolerance . . . . . . . ±80V
• Full Fail-safe (Open, Short, Terminated) RS-485
Receivers
• High Rx IOL for Opto-Couplers in Isolated Designs
• Hot Plug Circuitry - Tx and Rx Outputs Remain
Three-State During Power-up/Power-down
• Choice of RS-485 Data Rates . . . 250kbps to 15Mbps
• Low Quiescent Supply Current . . . . . . . . . . 2.3mA
• Ultra Low Shutdown Supply Current . . . . . . . . 10μA
• Pb-Free (RoHS Compliant)
Applications
• Utility Meters/Automated Meter Reading Systems
• High Node Count Systems
• PROFIBUS™ and Field Bus Networks, and Factory
Automation
• Security Camera Networks
• Building Lighting and Environmental Control Systems
• Industrial/Process Control Networks
Exceptional Rx Operates at
>15Mbps Even with a ±25V
Common Mode Voltage
ISL3149xE Delivers Superior
Common Mode Range vs
Standard RS-485 Devices
TIME (20ns/DIV)
-5
0
5
10
15
20
25
30
B
VID = ±1V
A
RO
ISL3149xE
CLOSEST
COMPETITOR
STANDARD RS-485
TRANSCEIVER
-25
-20
-12
-7
0
12
25
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
| Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2010 All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
June 17, 2010
FN7637.0


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