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.
The new devices meld ST's long-standing leadership in Transient Voltage Suppressors 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:
- 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
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.
The SCLT3-8BQ7 and CLT01-38SQ7 are now available in volume at $0.9 for 1,000-unit quantities. Also, evaluation boards are available for both the SCLT3-8BQ7 (STEVAL-IFP030V1) and the CLT01-38SQ7 (X-NUCLEO-PLC01A1).