54F651SDMQB

Overview

The 54F651SDMQB is a registered bus transceiver from the F/FAST series, manufactured by National Semiconductor. It features one functional element with eight bits per element and provides inverted outputs. The device supports 3-state output logic levels and operates within a voltage range of 4.5V to 5.5V. It is housed in a 24-CDIP package designed for through-hole mounting. The component functions as an inverting transceiver suitable for TTL applications.

Feature Summary

• Registered bus transceiver architecture with inverted output functionality
• Supports 3-state output control for bus isolation
• Compatible with TTL logic families

Applications

• High-speed data bus interfaces
• Memory buffer circuits
• Digital signal routing systems

Procurement Notes

Verify the manufacturer origin, as National Semiconductor assets are managed by Texas Instruments. Confirm the specific suffix SDMQB corresponds to the CDIP package and commercial/industrial temperature range. Ensure the component matches the original datasheet specifications for registered bus transceivers before integration into designs requiring precise timing characteristics.

Selection Notes

Select this component when an 8-bit registered bus transceiver with inverted outputs and 3-state capability is required. It is suitable for applications needing TTL compatibility and through-hole packaging. Consider the operating voltage range of 4.5V to 5.5V and the specific package constraints of the 24-CDIP form factor during circuit design.

Part Context

This part belongs to the National Semiconductor F/FAST series of logic devices. These components were widely used in digital systems for high-speed data transfer and buffering. The 54F651 specifically addresses the need for registered bus interfacing with inversion capabilities, serving as a critical interface between different logic domains or memory subsystems in legacy and industrial electronics.

Replacement Considerations

Public confirmed substitute part numbers include F68A52CP, F68A52CS, F6852S, F6852DMQB, F68A52S, and F68B52S.