54AC158FMQB

Overview

The 54AC158FMQB is a hex 1-input inverter gate integrated circuit belonging to the AC series. It features six independent inverters within a single package. The device utilizes a ceramic flatpack (DFP) package with 14 terminals, specifically CDFP14. It operates within a temperature range of -55 °C to 125 °C and supports supply voltages of 3.3 V or 5 V. The typical propagation delay at nominal supply is 15.5 ns. The output characteristic is open-drain, with a maximum output current of 0.012 A and a load capacitance of 50 pF.

Feature Summary

• Contains six independent one-input inverter gates for signal inversion.
• Constructed with a glass-sealed ceramic body for high reliability.
• Features open-drain output configuration for flexible interfacing.
• Rated for extended industrial temperature environments up to 125 °C.

Applications

• Digital signal inversion in military-grade electronic systems
• Logic level shifting in aerospace instrumentation
• Signal conditioning in harsh environment control units

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm the specific suffix FMQB matches the required ceramic flatpack variant. Check RoHS compliance status as indicated by the non-compliant designation in available records. Ensure storage conditions preserve the integrity of the ceramic seal and terminal connections prior to installation.

Selection Notes

Select this component when six independent inverters are required in a radiation-hardened or high-temperature environment. The open-drain output necessitates external pull-up resistors for proper logic high levels. Compare against standard plastic packages if thermal dissipation or hermetic sealing is critical for the application design.

Part Context

This part is manufactured by National Semiconductor, now part of Texas Instruments. It belongs to the 54AC family of high-speed CMOS logic devices. The 54 prefix indicates military-grade qualification standards, distinguishing it from commercial 74AC variants. The FMQB suffix denotes the specific ceramic flatpack packaging and processing options.

Replacement Considerations

Direct substitutes include other 54AC series hex inverters in compatible packages such as the 54AC04. Verify pin compatibility and electrical specifications before substitution. Cross-reference with SN54AC04 equivalents from Texas Instruments for functional parity.