54H74DM

Overview

The DM54H74DM is a dual D-type flip-flop manufactured by National Semiconductor, utilizing High-Speed TTL (H-TTL) technology. It features positive-edge triggering with complementary outputs and independent preset and clear inputs. The device is housed in a 14-lead ceramic flatpack package designed for military-grade reliability. Key electrical parameters include a propagation delay of 10 ns at a nominal supply voltage of 5 V. It operates within a temperature range of -55 °C to 125 °C and supports a maximum frequency of 300 MHz.

Feature Summary

• Dual D-type flip-flops with positive-edge triggering
• Complementary outputs with independent preset and clear functions
• High-speed H-TTL logic technology
• Military-grade environmental and burn-in processing

Applications

• Military aerospace data processing systems
• High-speed digital signal processing registers
• Isolated memory storage elements in harsh environments
• Pulse generation and timing circuits

Procurement Notes

Verify the specific suffix 'DM' confirms the ceramic flatpack package and military screening level. Confirm that the component meets MIL-STD-883 requirements for the intended application. Check for RoHS compliance status as this part may not be compliant. Ensure the supplier provides traceability documentation for the military grade classification.

Selection Notes

Select this component when high-speed switching and wide temperature operation are required. Compare against LS or S series alternatives if lower power consumption is prioritized over speed. Verify pin compatibility with existing PCB layouts due to the specific flatpack footprint. Consider availability of equivalent military-grade sources from Texas Instruments.

Part Context

This part belongs to the 54Hxx family of High-Speed TTL logic devices produced by National Semiconductor. It serves as a core sequential logic element for complex digital systems requiring fast response times. The family is characterized by its robust performance in demanding operational conditions.

Replacement Considerations

Equivalent parts include DM54H74J and DM54H74FM. Verify package dimensions and pinout compatibility before substitution. Ensure the replacement maintains the same military screening standards.