TMPR4955AF datasheet(38/168 Pages) TOSHIBA

38 / 168 page

General Safety Precautions and Usage Considerations

3-18

3.6.6

Interference from light (ultraviolet rays, sunlight, fluorescent lamps and

incandescent lamps)

Light striking a semiconductor device generates electromotive force due to photoelectric effects. In

some cases the device can malfunction. This is especially true for devices in which the internal

chip is exposed. When designing circuits, make sure that devices are protected against incident

light from external sources. This problem is not limited to optical semiconductors and EPROMs.

All types of device can be affected by light.

3.6.7

Dust and oil

Just like corrosive gases, dust and oil can cause chemical reactions in devices, which will

adversely affect a device’s electrical characteristics. To avoid this problem, do not use devices in

dusty or oily environments. This is especially important for optical devices because dust and oil

can affect a device’s optical characteristics as well as its physical integrity and the electrical

performance factors mentioned above.

3.6.8

Fire

Semiconductor devices are combustible; they can emit smoke and catch fire if heated sufficiently.

When this happens, some devices may generate poisonous gases. Devices should therefore never

be used in close proximity to an open flame or a heat-generating body, or near flammable or

combustible materials.

3.7

Disposal of Devices and Packing Materials

When discarding unused devices and packing materials, follow all procedures specified by local

regulations in order to protect the environment against contamination.

TMPR4955AF датащи(PDF) 38 Page - Toshiba Semiconductor