74LCX646MSA

Overview

The Fairchild Semiconductor 74LCX646MSA is a low-voltage CMOS octal bus transceiver and register featuring three-state outputs. It integrates D-type flip-flops and control circuitry for multiplexed data transmission. The device operates within a supply voltage range of 2V to 3.6V and supports surface-mount installation in a 20-SSOP package. It is designed for high-speed operation with low power dissipation, suitable for battery-powered applications.

Feature Summary

• Octal bus transceiver architecture with registered data storage capabilities
• Three-state output drivers for efficient bus line management
• D-type flip-flop integration for synchronized data latching
• Low-voltage CMOS technology ensuring reduced power consumption

Applications

• Multiplexed data transmission systems
• Battery-powered electronic devices requiring low power logic
• Bus-oriented memory and interface circuits
• Portable equipment utilizing 3V or 3.3V power supplies

Procurement Notes

Verify the specific manufacturer source, as Fairchild Semiconductor has undergone corporate restructuring. Confirm RoHS compliance status and check for obsolescence notices from current distributors. Ensure the 20-SSOP package dimensions match your PCB footprint requirements before finalizing procurement decisions.

Selection Notes

Select this component when an octal width is required for bus interfacing with registered storage. Compare against standard non-registered transceivers if data latching is necessary. Verify that the 2V to 3.6V operating range aligns with the target system's voltage levels and that the SSOP package fits the available board space constraints.

Part Context

This part belongs to the 74LCX series of low-voltage CMOS logic devices. It serves as a registered variant within the octal bus transceiver category, distinct from non-registered counterparts like the 74LCX245. The MS suffix indicates the specific 20-SSOP surface-mount packaging configuration used by the manufacturer.

Replacement Considerations

Direct substitutes include other manufacturers' 74LCX646 variants in SSOP packages. Cross-reference pinouts and electrical characteristics carefully when considering alternatives from different foundries to ensure functional compatibility.