STMicroelectronics has introduced two high-speed 
digital-input current limiters that set new standards for circuit protectionin factory automation. The SCLT3-8BQ7 and CLT01-38SQ7 provide industrial Programmable Logic Controllers(PLCs) – the “brains” of smart factories and industrial robots –with fast, robust protection against unwanted input-signal current spikes while reducing power consumption, board space, and component costs.
The new devices meld ST’s long-standing leadership in Transient Voltage Suppressors[1] with its state-of-the-art packaging technology.Both devices are housed in the highly compact QFN-48L (7x7mm)package with a large exposed thermal pad that optimizes power dissipation at ambient temperatures greater than 100ºC.
Key technical features include:
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8 high-speed SPI protected outputs;
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8/16-bit high-speed SPI output;
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High-side inputs with common ground;
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Integrated 5V regulator;
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30V+ reverse polarity protection;
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Energy-free LED output signal for visual status indication;
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78mW/channel power-dissipation capability;
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Temperature/voltage alarm options.
