Miniature through-hole IR receivers improve optical performance

Two series of miniature infra red (IR) receiver modules for IR remote control applications in consumer products have been introduced by Vishay Intertechnology. The TSOP33xxx and TSOP53xxx devices are offered in the Minimold package. According to the company, they deliver the same RF noise rejection as Minicast receivers, while surpassing the high optical performance of Mold package devices.

For TVs, set-top boxes, air conditioners, and hi-fi audio systems, the devices provide high sensitivity with typical irradiance down to 0.08mW/m² at 0 degree (TSOP33xxx) and 0.12mW/m² (TSOP53xxx series). The 0 degree sensitivity is the same as for the Mold package, but the Minimold package exhibits higher sensitivities at all off-angles up to 45 degree. The Minimold package also has an “F” option for an enhanced optical filter against out-of-band optical noise.

To simplify designs, both series feature a photo detector, pre-amplifier circuit, and IR filter in a single, 3pin epoxy package. The receivers offer a supply voltage from 2.5 to 5.5V; low supply current of 0.35mA typical (TSOP33xxx) and 0.7mA (TSOP53xxx). Transmission range is up to 45m and carrier frequencies are from 30 to 56kHz. The devices are also claimed to provide improved immunity against ambient light and are insensitive to supply voltage variations and ripple noise.

The IR receivers are offered in five automatic gain control (AGC) versions for short and long burst codes. The TSOP331xx, TSOP332xx, TSOP531xx, and TSOP532xx provide legacy compatibility with all common IR control data formats. The TSOP333xx, TSOP334xx, TSOP533xx, and TSOP534xx are suitable for all remote control applications and can suppress spurious pulses from energy-saving lamps and Wi-Fi sources, in addition to continuously transmitted data signals.

There is an option for the Minimold receivers to support IR reflow soldering, in addition to support for wave or hand soldering with Mold and Minicast packages. Both series are available in two holder and three bend options, including a top-view surface-mount version. The devices are RoHS-compliant and halogen-free.


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