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ISL32496E Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL32496E Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 22 page 1 ±60V Fault Protected, 5V, RS-485/RS-422 Transceivers with ±25V CMR and ESD Protection ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E, ISL32498E The ISL32490E, ISL32492E, ISL32493E, ISL32495E, ISL32496E, ISL32498E 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 fault protected up to ±60V and are protected against ±16.5kV ESD strikes without latch-up. 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 fault protected RS-485 family one of the most robust on the market. Transmitters (Tx) 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 that 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 RS-485 transceivers with cable invert (polarity reversal) pins, please see the ISL32483E 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 • ±16.5kV HBM ESD Protection on RS-485 Bus Pins • 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 Applications • Utility Meters/Automated Meter Reading Systems •High Node Count RS-485 Systems • PROFIBUS™ and RS-485 Based Field Bus Networks, and Factory Automation •Security Camera Networks • Building Lighting and Environmental Control Systems • Industrial/Process Control Networks FIGURE 1. EXCEPTIONAL Rx OPERATES AT >15Mbps EVEN WITH A ±25V COMMON MODE VOLTAGE FIGURE 2. ISL3249xE 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 ISL3249xE CLOSEST COMPETITOR STANDARD RS-485 TRANSCEIVER -25 -20 -12 -7 0 12 25 March 16, 2012 FN7786.2 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. 2011, 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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