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ISL3245xE Differential Transceivers
Intersil's ISL3458E and ISL3459E differential transceivers offer over-voltage protection and improved functionality
Image of Intersil's ISL3245xE Differential TranceiversIntersil's ISL32458E and ISL32459E offer an overvoltage protection feature that makes for a robust and compelling solution for customers designing in very harsh environments. Additionally, what was once needed to be designed externally is now integrated into the IC, thus improving functionality and accelerating time to market.
The ISL32458E and ISL32459E are 3.3 V to 5 V 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 ±60 V, and against ±15 kV ESD strikes. These transceivers operate in environments with common-mode voltages up to ±20 V (exceeds the RS-485 requirement), which makes the entire RS-485 family one of the more robust ones on the market.
The transmitters are RS-485 compliant with VCC ≥ 4.5 V and deliver a 1.1 V differential output voltage into the RS-485 specified 54 Ω load even with VCC = 3 V. 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 full fail-safe operation is maintained even when the Rx input polarity is switched (cable invert function on ISL32459E). This cable invert function reverses the polarity of the Rx and Tx bus pins in case the cable is misconnected during installation.
Features
Fault protected RS-485 bus pins up to ±60 V
Extended common-mode range ±20 V larger than required for RS-485
±15 kV HBM ESD protection on RS-485 bus pins
Wide supply range 3 V to 5.5 V
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 ±80 V
Full fail-safe (open, short, terminated) RS-485 receivers
Choice of RS-485 data rates up to 20 Mbps
Low quiescent supply current: 2.1 mA
Applications
Utility meters/automated meter reading systems
Air conditioning systems
Security camera networks
Building lighting and environmental control systems
Industrial/process control networks
ISL3245xE Differential Receivers
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ISL32458EIBZ-T7A datasheet link IC TXRX RS422/RS485 8SOIC ISL32458EIBZ-T7A IC TXRX RS422/RS485 8SOIC 180 - 立即發貨
750 - 廠方庫存 ISL32458EIBZ-T7A 產品頁鏈接
ISL32459EIBZ-T7A datasheet link IC TXRX RS422/RS485 8SOIC ISL32459EIBZ-T7A IC TXRX RS422/RS485 8SOIC 239 - 立即發貨
ISL32459EIBZ-T7A 產品頁鏈接
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