Vishay released a series of surface-mount infrared receiver modules. Designed for long-range operation in infrared remote control, data transmission, and light barrier applications, the TSOP85 series is intended for use in portable systems requiring ultra-small component profiles. Typical end products include small handheld devices, such as laptops, digicams and video equipment, music and video players, and navigation equipment. In optical modules, decreasing the package size results in a reduction of lens size, which therefore reduces sensitivity and range. The series, however, neutralizes this effect through the addition of a second lens and photodiode.

In addition, the two-lens arrangement achieves a broader receiving angle than can be achieved with only one lens. The receiver module combine two photo detectors and a preamplifier in a top- or side-view surface mount package. The devices offer a footprint with a height of 3.3 mm in top view and only 2.74 mm in side view. In addition to being specified for a supply voltage range of 2.7 V to 5.5 V, the series contains versions capable of operating with short-burst ( ≥ 6 cycles/burst) transmission codes and data rates up to 4000 bit/s, and versions exhibiting immunity to even severe environmental noise. All devices in the series are available in seven standard carrier frequencies from 30 kHz up to 56 kHz and contain internal Automatic Gain Control (AGC) circuitry, providing enhanced immunity against optical noise and other ambient disturbances.