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74F138 - 1-of-8 decoder/demultiplexer

Description

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

Q7).

Features

  • 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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Datasheet Details

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

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Full PDF Text Transcription

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INTEGRATED CIRCUITS 74F138 1-of-8 decoder/demultiplexer Product specification IC15 Data Handbook 1991 Feb 14 Philips Semiconductors Philips Semiconductors Product specification 1-of-8 decoder/demultiplexer 74F138 FEATURE • Demultiplexing capability • Multiple input enable for easy expansion • Ideal for memory chip select decoding • Industrial temperature range available (–40°C to +85°C) DESCRIPTION The 74F138 decoder accepts three binary weighted inputs (A0, A1, A2) and when enabled, provides eight mutually exclusive, active low outputs (Q0 – Q7). The device features 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.
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