MM54HC74E/883

Flip Flops Overview

The MM54HC74E/883 is a dual D-type flip-flop with preset and clear, manufactured by National Semiconductor (TI). It utilizes advanced silicon-gate CMOS technology for high-speed operation. The device features independent data, preset, clear, and clock inputs alongside Q and Q-bar outputs. It operates within a voltage range of 2V to 6V and supports a wide temperature range from -55°C to +125°C. Housed in a ceramic LLCC package with 20 pins, it is qualified under MIL-STD-883 standards.

Flip Flops Feature Summary

• Dual D-type flip-flop architecture with independent preset and clear functions
• Advanced silicon-gate CMOS technology ensuring high noise immunity
• Ceramic hermetic packaging suitable for harsh environments
• Wide operating temperature range for aerospace applications

Flip Flops Applications

• Aerospace digital logic systems
• Spacecraft data processing units
• Harsh environment control circuits

Flip Flops Procurement Notes

Verify the specific ESCC part number and qualification level (e.g., Class S or equivalent) against the latest manufacturer documentation. Confirm that the ceramic hermetic package matches the required environmental sealing specifications. Ensure compatibility with existing MIL-STD-883 test methods for radiation hardness and thermal cycling requirements before integration.

Flip Flops Selection Notes

Select this component for designs requiring radiation-hardened CMOS logic with wide temperature tolerance. It is functionally compatible with standard 74HC series but offers enhanced reliability through ceramic packaging. Consider the 2V to 6V operating range for power supply design. Verify input protection mechanisms against static discharge if used in non-hermetic sub-assemblies.

Flip Flops Part Context

Part of the M54HCxxx and M54HCTxxx series designed for aerospace industry radiation requirements. These components are ESCC qualified and feature high single-event latch-up immunity. The series includes various gates, flip-flops, and counters housed in ceramic packages for space and harsh conditions.

Flip Flops Replacement Considerations

MM54HC74J/883

Flip Flops FAQ

What is the radiation hardness specification?

The device has a total dose hardness of 50 krad(Si) and is immune to single event latch-up up to 125 MeV.cm²/mg.

Does the preset and clear function depend on the clock?

No, the preset and clear inputs are asynchronous and operate independently of the clock signal.