CD74HCT299M

Shift Registers Overview

The CD74HCT299M is an 8-bit bidirectional parallel-in/parallel-out shift register from the HCT logic series, manufactured by Texas Instruments. It features true outputs with three-state capability and utilizes common I/O pins for data input and output. The device operates on a single power supply ranging from 4.5V to 5.5V and supports bidirectional shifting controlled by specific direction inputs. It is housed in a 20-pin Small Outline (SOIC) package designed for surface-mount applications.

Shift Registers Feature Summary

• Bidirectional shifting capability allowing data movement in both directions via dedicated control inputs
• Common I/O pin architecture enabling shared usage for serial input and parallel output functions
• Three-state outputs providing gated output control for bus-oriented systems
• High-speed CMOS technology ensuring compatibility with standard TTL logic levels

Shift Registers Applications

• Data storage and transfer in digital communication interfaces
• Parallel-to-serial and serial-to-parallel conversion circuits
• General-purpose shift register applications requiring bidirectional data flow
• Bus interface designs utilizing tri-state output control

Shift Registers Procurement Notes

Verify the manufacturer source carefully, as this part number is frequently associated with Rochester Electronics as a secondary supplier rather than direct Texas Instruments production. Confirm the specific datasheet version and manufacturing origin during procurement to ensure alignment with system requirements. Check for any variations in electrical characteristics or packaging details that may differ between original and authorized distributor sources.

Shift Registers Selection Notes

Select this component when designing systems requiring an 8-bit shift register with bidirectional functionality and tri-state outputs. Ensure the operating voltage range of 4.5V to 5.5V matches the system power supply. Consider the 20-pin SOIC package constraints for PCB layout. Verify that the HCT logic family voltage compatibility meets the interfacing requirements of connected components.

Shift Registers Part Context

This component belongs to the Texas Instruments CD74HCT series, which provides high-speed CMOS logic with TTL-compatible inputs. The 74HCT299 specifically addresses applications needing bidirectional data shifting with common I/O lines. It is part of a broader family of shift registers and counters designed for general-purpose digital logic applications requiring reliable data movement and storage capabilities.

Shift Registers Replacement Considerations

Check for equivalent parts such as the CD74HC299M96G4 or CD74HCT299M96G4 within the same manufacturer lineup. Verify pinout compatibility and electrical specifications before substitution. Ensure that any replacement maintains the required bidirectional shifting and tri-state output features.