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SM74HC138D

ل.س2,500

3-to-8 line decoder/demultiplexer; inverting

SKU: GRO283 Category:

Description

The 74HC138; 74HCT138 decodes three binary weighted address inputs (A0, A1 and A2) to eight mutually exclusive outputs (Y0?to?Y7). The device features three enable inputs (E1,?E2?and E3). Every output will be HIGH unless?E1?and?E2?are LOW and E3 is HIGH. This multiple enable function allows easy parallel expansion to a 1-of-32 (5 to 32 lines) decoder with just four ?138? ICs and one inverter. The ?138? can be used as an eight output demultiplexer by using one of the active LOW enable inputs as the data input and the remaining enable inputs as strobes. Inputs include clamp diodes. This enables the use of current limiting resistors to interface inputs to voltages in excess of VCC.

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