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Linear Tech transceivers safeguard Profibus networks

21 Apr 2016  | Susan Nordyk

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Linear Technology has released the LTC2876 and LTC2877 RS-485 transceivers that tolerate ±60V on their bus pins, whether transmitting, receiving, on standby, or powered off, to protect Profibus-DP (decentralised periphery) master and slave devices. An extended ±25V input common-mode range and full failsafe operation improve data-communication reliability in electrically noisy environments, stated the company.

LTC2876, LTC2877 RS-485

High ESD protection enables the parts to withstand ±52kV HBM on the transceiver pins without latchup or damage. All other pins are protected to ±15kV HBM. Both the LTC2876 and LTC2877 are tested with Profibus IEC 61158-2 and TIA/EIA-485-A loads to ensure compatibility with both standards.

Specified over commercial, industrial and automotive temperature ranges, the transceivers operate with a 5V supply, but can operate down to 3V for low-power, low-swing applications. The LTC2876 is available in 8-pin, 3mm x 3mm DFN and MSOP packages. The LTC2877, which includes a 1.65V to 5.5V logic supply pin for flexible digital interfacing, comes in a 10-pin, 3mm x 3mm DFN or MSOP. Prices start at $2.48 each in lots of 1000 units.




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