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ISL31491E датащи(PDF) 1 Page - Intersil Corporation |
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ISL31491E датащи(HTML) 1 Page - Intersil Corporation |
1 / 27 page 1 ±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 |
Аналогичный номер детали - ISL31491E |
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Аналогичное описание - ISL31491E |
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