SNJ54ALS251J

Signal Switches, Multiplexers, Decoders Overview

The SNJ54ALS251J is a military-grade data selector/multiplexer from the ALS series, housed in a 16-pin ceramic dual in-line package (CDIP). It features full binary decoding to select one of eight data sources with controlled complementary 3-state outputs. The device operates over the full military temperature range of -55°C to 125°C and requires a supply voltage between 4.5V and 5.5V.

Signal Switches, Multiplexers, Decoders Feature Summary

• Features controlled complementary 3-state outputs that interface directly with system buses
• Contains full binary decoding to select one-of-eight data sources
• Provides both true and inverted data outputs for flexible logic integration

Signal Switches, Multiplexers, Decoders Applications

• Bus-organized systems requiring direct data line driving
• Parallel-to-serial conversion circuits
• Military and defense applications necessitating extended temperature operation

Signal Switches, Multiplexers, Decoders Procurement Notes

Verify the specific ordering suffix 'J' corresponds to the CDIP ceramic package variant. Confirm the component meets QML certification requirements if intended for military or defense applications. Ensure the design accommodates the 16-pin through-hole mounting style and verify compatibility with the specified ALS logic family voltage levels.

Signal Switches, Multiplexers, Decoders Selection Notes

Select this component when bus interfacing is required alongside multiplexing functions. The 3-state capability allows multiple devices to share a common data bus without contention. Choose this part over standard TTL variants for superior speed and lower power consumption characteristics inherent to the ALS technology.

Signal Switches, Multiplexers, Decoders Part Context

This device belongs to the Texas Instruments SN54ALS251 family, representing the military-grade version of the ALS151 multiplexer. It is functionally equivalent to the SN74ALS251 but rated for the full -55°C to 125°C operating range. The 'J' suffix specifically denotes the ceramic dual in-line package construction.

Signal Switches, Multiplexers, Decoders Replacement Considerations

SN54ALS251FK

Signal Switches, Multiplexers, Decoders FAQ

How are the 3-state outputs controlled?

Both outputs are controlled by the output-enable (OE) input. The outputs are disabled when OE is high, entering a high-impedance state.

What is the function of the complementary outputs?

The device provides both true (Y) and inverted (W) data outputs simultaneously, allowing access to both logic states of the selected input.