CD74FCT653M

Overview

The CD74FCT653M is an octal registered bus transceiver manufactured by Texas Instruments within the FCT logic series. It features eight-bit data storage with inverted outputs and a three-state interface. The device operates on a single supply voltage ranging from 4.75 V to 5.25 V, ensuring compatibility with standard TTL input levels. Designed for surface-mount applications, it utilizes a 24-pin SOIC package. Key electrical characteristics include a propagation delay of approximately 10 ns at 5 V, low power consumption, and robust output drive capabilities suitable for high-speed digital systems.

Feature Summary

• Octal registered bus transceiver architecture with data storage capability
• Inverted outputs providing true signal inversion for system design flexibility
• Three-state outputs enabling efficient bus line sharing and multiplexed transmission
• TTL-compatible inputs ensuring seamless integration with standard logic families

Applications

• High-performance microprocessor-based systems requiring data latching
• Clocking registers in complex digital circuit designs
• Bus-oriented memory and I/O architectures
• Multiplexed data transmission networks

Procurement Notes

Verify the specific suffix 'M' against official Texas Instruments documentation to confirm the exact package type and temperature range. Ensure the component matches the required RoHS compliance status for your manufacturing process. Cross-reference the manufacturer part number with authorized distributors to guarantee authenticity and traceability before procurement.

Selection Notes

Select this component when an octal register with inverted outputs and three-state control is required. It is suitable for designs needing TTL-level input compatibility and moderate speed performance. Consider the SOIC-24 package constraints for PCB layout. Evaluate if the specific inversion characteristic aligns with the target logic requirements compared to non-inverting alternatives.

Part Context

This component belongs to the FCT (Fast CMOS) family, which bridges the performance gap between standard CMOS and LS-TTL technologies. The FCT series offers faster switching speeds while maintaining low power consumption. The CD74 prefix indicates that this specific part was originally developed by National Semiconductor before its acquisition by Texas Instruments, now supported under the TI portfolio.

Replacement Considerations

Direct replacements may include the SN74FCT653 or CD74FCT653 variants with compatible pinouts. Verify that substitute parts maintain the same inverted output polarity and three-state functionality. Ensure any alternative meets the identical 4.75 V to 5.25 V operating voltage range and package dimensions.