54H22DM

Overview

The DM54H22J/883B is a military-grade dual 4-input NAND gate utilizing H-TTL technology. It features an open-collector output configuration and is housed in a 14-pin ceramic DIP package. The device operates within a temperature range of -55°C to 125°C with a nominal supply voltage of 5 V. Propagation delay is specified at 15 ns, and maximum output current is 0.02 A.

Feature Summary

• Dual 4-input NAND logic function
• Open-collector output capability
• Military-grade reliability certification
• Ceramic flatpack construction

Applications

• High-reliability digital logic processing
• Military aerospace control systems
• Industrial automation interfaces
• Harsh environment signal gating

Procurement Notes

Verify the specific suffix (e.g., J/883B) against official Texas Instruments or National Semiconductor documentation to confirm MIL-STD-883 Class B screening and ceramic package type. Ensure compatibility with existing H-TTL voltage levels and open-collector load requirements before integration.

Selection Notes

Select this component for applications requiring high-speed switching with open-collector outputs in extreme temperature environments. Verify that the system design accommodates the pull-up resistors necessary for open-collector operation and meets the 5 V supply tolerance.

Part Context

This part belongs to the SN54/HW series of high-speed TTL logic devices manufactured by National Semiconductor, now under Texas Instruments. These components are designed for military and aerospace applications requiring extended temperature ranges and robust performance standards.

Replacement Considerations

Check for direct equivalents such as other SN54H22 variants with matching pinouts and electrical characteristics. Confirm that any substitute maintains the same open-collector output structure and military qualification level.