74F138 - 1-of-8 decoder/demultiplexer

Product Overview

NXP

Part number	74F138
Manufacturer	NXP
File Size	85.19 KB
Description	1-of-8 decoder/demultiplexer
Datasheet	74F138 Datasheet
Additional preview pages of the 74F138 datasheet.

The 74F138 decoder accepts three binary weighted inputs (A0, A1, A2) and when enabled, provides eight mutually exclusive, active low outputs (Q0 Q7).

three enable inputs; two active low (E0, E1) and one active high (E2). Every output will be high unless E0 and E1 are low and E2 is high. This multiple enable function allows easy parallel expansion of the device to 1-of-32 (5 lines to 32 lines) decoder with just four 74F138s and one inverter (see Figure 1). The device 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. Enable inputs not used must.

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Published: Apr 3, 2005 |