±40V Fault Protected, 3.3V to 5V, ±15V Common Mode Range, RS-485/RS-422 Transceivers With Cable Invert and ±15kV ESD
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概要
Description
The ISL32430E, ISL32432E, ISL32433E, ISL32435E, and 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 most robust on the market. The 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. The receiver (Rx) inputs feature a full fail-safe design that ensures a logic high Rx output if the Rx inputs are floating, shorted, or on a terminated but undriven (idle) bus. The 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 if the cable is misconnected during installation.
特長
- 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 corrects for reversed cable connections while maintaining Rx full fail-safe functionality (ISL32437E only)
- 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: 10µ
- Pb-free (RoHS compliant)
アプリケーション
アプリケーション
- Utility Meters/Automated Meter Reading Systems
- Air Conditioning Systems
- Security Camera Networks
- Building Lighting and Environmental Control Systems
- Industrial/Process Control Networks
ドキュメント
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