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HD74ACT138 - 1-of-8 Decoder/Demultiplexer

General Description

The HD74AC138/HD74ACT138 is a high-speed 1-of-8 decoder/demultiplexer.

This device is ideally suited for high-speed bipolar memory chip select address decoding.

Key Features

  • Demultiplexing Capability Multiple Input Enable for Easy Expansion Active LOW Mutually Exclusive Outputs Outputs Source/Sink 24 mA HD74ACT138 has TTL-Compatible Inputs HD74AC138/HD74ACT138 Pin Arrangement A0 1 A1 2 A2 3 E1 4 E2 5 E3 6 O7 7 GND 8 (Top view) 16 VCC 15 O0 14 O1 13 O2 12 O3 11 O4 10 O5 9 O6 Logic Symbol A0 A1 A2 E1 E2 E3 O0 O1 O2 O3 O4 O5 O6 O7 Pin Names A0 to A2 E1 to E 2 E3 O0 to O 7 Address Inputs Enable Inputs Enable Inp.

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📁 Similar Datasheet

Part Number Description Manufacturer
HD74ACT138 1-of-8 Decoder/Demultiplexer Renesas
HD74ACT139 Dual 1-of-4 Decoder/Demultiplexer Renesas
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HD74ACT112 Dual JK Negative Edge-Triggered Flip-Flop Renesas
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Other Datasheets by Hitachi Semiconductor (now Renesas)

Part Number Description
HD74ACT139 Dual 1-of-4 Decoder/Demultiplexer
HD74ACT107 Dual JK Flip-Flop (with Separate Clear and Clock)
HD74ACT112 Dual JK Negative Edge-Triggered Flip-Flop
HD74ACT125 Quad Buffer/Line Driver with 3-State Output
HD74ACT126 Quad Buffer/Line Driver with 3-State Output

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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HD74AC138/HD74ACT138 1-of-8 Decoder/Demultiplexer Description The HD74AC138/HD74ACT138 is a high-speed 1-of-8 decoder/demultiplexer. This device is ideally suited for high-speed bipolar memory chip select address decoding. The multiple input enables allow parallel expansion to a 1-of-24 decoder using just three HD74AC138/HD74ACT138 devices or a 1-of-32 decoder using four HD74AC138/HD74ACT138 devices and one inverter.