AC3559FILL

APEM  AC3559FILL  键盘, 100 mA, 30 V, 1 x 4, 矩阵, 4

The is a 1 x 4 matrix Key Pad can be interfaced easily to a bi-directional 8-bit port on a microprocessor. The latching functions can be achieved by setting and resetting a flag alternatively when a key is pressed. Lighting the LEDs is almost the opposite of reading the keys. Depending on the complexity of the equipment, one could constantly go round a loop adjusting the ON/OFF status of each LED to the required state, effectively scanning the LEDs.

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>100MR at 100V Insulation resistance

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<30R Contact resistance

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250Vrms Dielectric strength

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10pF Typical capacitance

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-30 to 55°C Operating temperature range