SNJ54ALS139J

Signal Switches, Multiplexers, Decoders Overview

The SNJ54ALS139J is a dual 2-line to 4-line decoder/demultiplexer from the ALS series, housed in a ceramic DIP package. It operates over a military temperature range of -55°C to 125°C with a supply voltage of 4.5V to 5.5V. Propagation delays are typically 3ns to 17ns at 50pF load. The device features active-low enables and fully buffered inputs clamped by Schottky diodes.

Signal Switches, Multiplexers, Decoders Feature Summary

• Dual independent decoders or demultiplexers within a single package
• Active-low enable inputs for cascading and data routing
• Fully buffered inputs with Schottky diode clamping

Signal Switches, Multiplexers, Decoders Applications

• High-speed memory decoding systems
• Data transmission and routing applications
• Demultiplexing circuits requiring short propagation delay

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the SNJ54ALS139J part number against official Texas Instruments documentation to confirm it is a military-grade component. Ensure the CDIP package matches system requirements. Check current production status as legacy parts may have limited availability.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component for designs requiring high-speed decoding with extended temperature tolerance. The ALS technology offers lower power consumption than standard TTL while maintaining speed. Verify that the 16-pin ceramic package fits the mechanical constraints of the target application.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the SN54/74ALS family, known for Advanced Low-Power Schottky logic. The 'SNJ' prefix indicates a military-grade ceramic DIP package. It complements other ALS logic devices like the SN54ALS138 decoder or SN54ALS74 flip-flops in complex digital systems.

Signal Switches, Multiplexers, Decoders Replacement Considerations

The SN54ALS139FK (LCCC package) serves as a pin-compatible alternative within the same series. For commercial grade applications, the SN74ALS139 is functionally equivalent but lacks the extended temperature rating.