ELECTRONICS: STMicroelectronics‘ SCLT3-8BT8 is a device combining field signal-termination and protection functions, enabling designers of industrial control and building-automation equipment to increase system performance and EMI robustness while simultaneously cutting power consumption, size, and heat dissipation.
ST’s SCLT3-8BT8 integrated protection and signal-termination device allows designers to increase the number of channels in new equipment designs without adding large numbers of extra components. Using conventional terminations, one optical transistor is required per data channel. The SCLT3-8BT8 combines eight data channels into a single serial output, allowing the number of optical transistors and associated components to be reduced significantly. This approach can save in excess of 50 percent of pc-board area and about 30 percent of power consumption, compared to existing alternatives.
The effective power consumption is less than 78mW per input, which saves energy and reduces heat generated by the isolator. This benefit is particularly valuable for sealed control units, which are required in applications such as food-processing and chemical industries.
With input characteristics meeting the international standard IEC61131-2 for programmable controllers, the device can be used in equipment for a wide range of applications and environments. The SCLT3-8BT8’s built-in protection features meet the IEC61000-4 standards for electrical transients up to ±4kV, voltage surges up to ±1kV, and ESD up to ±15kV air discharge. The device provides an industry-standard SPI communication interface, enabling direct connection to other components in the system such as ST’s VNI8200 high-side driver or an STM32 or STM8 microcontroller.
Samples of the SCLT3-8BT8 are now in stock, and budgetary pricing is $3.20 for orders over 1000 units.
-Edited by Kelsey Anderson