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74F138 - 1-of-8 decoder/demultiplexer

General Description

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

Q7).

Key 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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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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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.