74F138SJX

Signal Switches, Multiplexers, Decoders Overview

The onsemi 74F138SJX is a high-speed 1-of-8 decoder/demultiplexer belonging to the 74F logic family. It accepts three binary weighted address inputs (A0, A1, A2) and provides eight mutually exclusive active LOW outputs (O0–O7). The device features three enable inputs: two active LOW (E1, E2) and one active HIGH (E3). It operates within a supply voltage range of +4.5V to +5.5V and supports an ambient temperature range of 0°C to +70°C. The component is housed in a 16-Lead Small Outline Package (SOP), designated as package number M16D.

Signal Switches, Multiplexers, Decoders Feature Summary

• Demultiplexing capability with active LOW mutually exclusive outputs
• Multiple input enables allowing parallel expansion to larger decoders
• High-speed bipolar memory chip select address decoding suitability

Signal Switches, Multiplexers, Decoders Applications

• High-speed bipolar memory chip select address decoding
• Parallel expansion to 1-of-24 or 1-of-32 decoders
• 8-output demultiplexer configurations using enable inputs as data/strobe

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify that the specific ordering code includes the 'X' suffix to confirm tape and reel packaging availability. Confirm the manufacturer origin, as this part was originally produced by Fairchild Semiconductor before acquisition by onsemi. Ensure the SOP-16 package variant matches the required footprint for the target application design.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when high-speed decoding is required for bipolar memory systems. The 74F series offers faster propagation delays compared to standard TTL but consumes more power. Verify that the operating environment stays within the specified 0°C to +70°C temperature range and that the 5V supply voltage is stable.

Signal Switches, Multiplexers, Decoders Part Context

This device is part of the 74F logic family, known for high-speed performance. It serves as a fundamental building block for address decoding in digital systems. The SOP-16 package provides a compact surface-mount solution suitable for dense circuit board layouts requiring reliable signal routing for multiple output lines.

Signal Switches, Multiplexers, Decoders Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.