4555BDM

Overview

The 4555BDM is an 8-bit single latch integrated circuit manufactured by National Semiconductor, now part of Texas Instruments. It utilizes FCT/PCT-CMOS technology and is housed in a 24-pin ceramic Dual In-Line Package (DIP). The device operates with a nominal supply voltage of 5 V and supports a wide temperature range from -55 °C to +125 °C, qualifying it for military-grade applications. Key electrical characteristics include a maximum output low current of 0.032 A and three-state output capabilities.

Feature Summary

• Three-state output logic for bus-driven applications
• Military-qualified ceramic packaging for harsh environments
• FCT/PCT-CMOS technology for high-speed performance

Applications

• Military-grade data storage systems
• Harsh environment industrial control interfaces
• High-reliability computer memory modules

Procurement Notes

Verify the manufacturer lineage carefully, as National Semiconductor was acquired by Texas Instruments. Ensure the specific ordering code matches the required ceramic DIP package and military temperature rating. Confirm that the component meets all necessary environmental certifications for the intended deployment environment before finalizing procurement.

Selection Notes

Select this component when a robust, 8-bit latch with three-state outputs is required for military or aerospace applications. The ceramic package provides superior durability compared to plastic variants. Ensure the system design accommodates the 5 V supply requirement and the specific pinout configuration of the 24-pin DIP form factor.

Part Context

This component belongs to the FCT (Fast CMOS Technology) family, designed for high-speed digital applications. The 'B' suffix typically denotes the military temperature range and ceramic package variant. As a legacy product from National Semiconductor, it represents a standard interface solution for older military and industrial systems requiring reliable latching functionality.

Replacement Considerations

Direct replacements may be limited due to the specific military qualification and ceramic packaging. Verify compatibility with Texas Instruments equivalents if available. Ensure any substitute maintains the 24-pin DIP footprint, 5 V operation, and three-state output characteristics to fit existing board layouts.