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New High-Speed Digital-Input Current Limiters from STMicroelectronics


New Devices are Housed in Miniature QFN-48 Package and Provide Robust Protection Against Current Spikes


STMicroelectronics has introduced two high-speed digital-input current limiters that set new standards for circuit protection in 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.

Click for Larger Image - New High-Speed Digital-Input Current Limiters from STMicroelectronics The new devices meld ST's long-standing leadership in Transient Voltage Suppressors¹ 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 100°C.

The high-speed inputs and outputs are fully compliant with the requirements of best-in-class PLCs.

The CLT01-38SQ7 also delivers robustness compliant with the most stringent international EMC (Electromagnetic Compatibility) standards such as IEC 61000-4.2, IEC61000-4.4, and IEC6100-4.5.

Key Features of the Current Limiter include:

  • 8 high-speed SPI protected outputs
  • 8/16-bit high-speed SPI output
  • High-side inputs with common ground
  • Integrated 5V regulator
  • 30V+ reverse polarity protection
  • Energy-free LED output signal for visual status indication
  • 78mW/channel power-dissipation capability
  • Temperature/voltage alarm options

¹ According to independent market analysts IHS, ST was the No.1 supplier of Transient Voltage Suppressors worldwide in 2015, with a market share of nearly 15%.


The company's Web site address is www.st.com.
[Reprinted with kind permission from STMicroelectronics - Release Date 18th April, 2016]