Optoelectronics

Photorelays from Toshiba reduce mounting density

11th September 2020
Alex Lynn

Toshiba Electronics Europe has launched three new photorelays, the TLP3407SRA, TLP3475SRHA and TLP3412SRHA. With a 2.0x1.45mm footprint, they are some of the smallest voltage-driven photorelays on the market and offer an extended operating temperature rating of 125°C.

Raising the maximum operating temperature rating from 110 to 125°C allows the photorelays to be mounted in high-temperature areas and making it easier to secure required temperature design margins for equipment. The S-VSON4T package offers currently one of the smallest PCB mounting areas of 2.9mm² and is only 1.3mm high.

This compact size will contribute to reducing PCB size or increasing the number of photorelays in an existing layout in applications such as semiconductor testers, probe cards, burn-in equipment and other test and measurement equipment.

The TLP3407SRA features a very small ON-resistance (RON) of typically 0.2Ω, and an on/off switching current as high as 1A, making it ideal for switching applications in high-speed logic IC and memory testers. The device also has a low input power consumption of 3.3mW.

The TLP3407SRA features a built-in input resistance of 4,000Ω. The TLP3475SRHA and TLP3412SRHA built-in resistance is typically 600Ω. This eliminates the need for an external input resistor, further reducing the overall design footprint.

All devices also offer a low off-state current of 1nA at 50V, and come with low output pin capacitance of 80pF, 12pF and 20pF respectively.  

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