Power_electronics Features

New Developments in RET Technology - Feb/March 2021
Resistor-Equipped Transistors (RETs) also known as digital transistors or pre-bias transistors offer many benefits, including saving space, reducing manufacturing costs and increased...
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Power Electronics Europe News
Diode saves space in wearables and medical monitoring systems

The VSMD66694 is in a compact 2.0 x 2.0 x 0.87mm package. It features wavelengths of 660nm (red) and 940nm (IR) and is built on SurfLight technology for what the company claims is best-in-class radiant power of 9.5 and 8.5mW, respectively.

In smart watches and fitness bands, the diode can replace two leaded diodes with one component in a surface-mount package that can be combined with any custom-designed lens system. A narrow spectral bandwidth of 20 at 660nm, and its balanced radiant power at red and IR wavelengths provides balanced signal levels for SpO2 and pulse rate monitoring.

The emitter provides fast switching times of 10ns and forward voltage down to 1.4V. Suitable for high pulse current operation to 1A at 100µs, the device has a ±60° angle of half-intensity and operates over a temperature range of -25 to 85°C. Moisture sensitivity level (MSL) of 3 is in accordance with J-STD-020 for a floor life of 168 hours. It supports lead (Pb)-free reflow soldering, and is RoHS-compliant, halogen-free.

Samples and production quantities are available now.


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