Skip to main content
Log in
Texas Instruments 54LS51FM — DC-DC Power Modules

54LS51FM AND-OR-INVERT Gate, TTL, Active, RoHS Non-Compliant

MPN54LS51FM
End of Life

54LS51FM, AND-OR-INVERT GATE, TTL, Active lifecycle, RoHS non-compliant, Bulk package.

$4.73Ref. price · indicative, final on quote
Texas Instruments 54LS51FM datasheet (PDF)
RoHSRoHS non-compliant
Series*
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

54LS51FM specifications
ParameterValue
Series*
PackageBulk

Product details

The 54LS51FM is a single AND-OR-INVERT gate from the 54LS family of low-power Schottky TTL logic. It performs the logic function (A·B)+(C·D) inverted — a compact two-wide, two-input AND-OR-INVERT stage used in glue logic, data selection, and combinatorial decode paths where one package replaces several discrete gates. The 54LS prefix designates the military temperature range and full ceramic/hermetic construction typical of high-reliability, defence, and aerospace applications.

The RoHS non-compliance is the key BOM filter: this part uses lead-bearing solder terminations and is exempt from RoHS restrictions for military/aerospace equipment under many procurement frameworks.

The ceramic body and hermetic seal suit uncoated boards in high-vibration or high-humidity environments where plastic packages would risk moisture ingress. Plan for manual or tube-fed insertion; no automated reel feeder.

Frequently asked questions

What are alternatives to 54LS51FM?

The 4030BDM is a different logic function (quad XOR gate) and is not a functional substitute. For a direct AND-OR-INVERT replacement, look at other 54LS51 variants in the same family — same logic, same temperature grade, same pinout. The SN74F00DR and SN74F27NSR are 74F-series commercial-temperature parts with different logic functions (NAND and NOR respectively) and are not drop-in replacements.