ISL32455E中文资料±60V Fault Protected, 3.3V to 5V, ±20V Common Mode Range, RS-485/RS-422 Transceivers with Cable Invert and ±15kV ESD数据手册Renesas规格书

描述 Description

The ISL3245xE are 3. 3V to 5V powered, fault protected, extended Common-Mode Range (CMR) differential transceivers for balanced communication. The RS-485 bus pins (driver outputs and receiver inputs) are protected against overvoltages up to ±60V, and against ±15kV ESD strikes. These transceivers operate in environments with common-mode voltages up to ±20V (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 ISL32457E and ISL32459E). The ISL32457E and ISL32459E include a cable invert function that reverses the polarity of the Rx and Tx bus pins in case the cable is misconnected during installation.

特性 Features

• Fault protected RS-485 bus pins: up to ±60V
• Extended common-mode range: ±20V 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 (ISL32457E and ISL32459E 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: ±80V
• Full fail-safe (open, short, terminated) RS-485 receivers
• Choice of RS-485 data rates: up to 20Mbps
• Low quiescent supply current: 2.1mA

应用 Application

• Utility Meters/Automated Meter Reading Systems
• Air Conditioning Systems
• Security Camera Networks
• Building Lighting and Environmental Control Systems
• Industrial/Process Control Networks