CD74HCT299E

Shift Registers Overview

The CD74HCT299E is an 8-bit universal shift register manufactured by Texas Instruments, belonging to the HCT logic series. It features bidirectional serial-to-serial and parallel-to-parallel data transfer capabilities with three-state outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports propagation delays of up to 45 ns. It is housed in a 20-pin PDIP package and functions across an industrial temperature range from -55°C to +125°C.

Shift Registers Feature Summary

• Supports bidirectional serial shifting and parallel loading operations
• Provides gated three-state outputs for bus driving applications
• Compatible with standard CMOS logic families via HCT input structures

Shift Registers Applications

• Bidirectional data buffering between system buses
• Parallel-to-serial and serial-to-parallel conversion circuits
• General-purpose shift register implementations in digital systems

Shift Registers Procurement Notes

Verify that the component is sourced directly from Texas Instruments or authorized distributors to ensure authenticity. Confirm the specific suffix 'E' corresponds to the PDIP-20 through-hole package variant. Check RoHS compliance status as indicated in official documentation, noting potential discrepancies in third-party listings regarding lead-free certification.

Shift Registers Selection Notes

Select this component when a bidirectional 8-bit shift register with high-speed CMOS performance is required. The HCT series ensures compatibility with TTL-level inputs while maintaining low power consumption. Ensure the application requires three-state output control for effective bus sharing. Verify that the operating temperature range meets the environmental demands of the target system.

Shift Registers Part Context

This part belongs to the CD74HCT299 family of universal shift registers. It shares functional similarities with other 8-bit shift registers but is distinguished by its HCT logic compatibility and three-state output capability. The device serves as a fundamental building block for data movement and storage in complex digital logic designs.

Shift Registers Replacement Considerations

The CD74HCT299M is a surface-mount alternative offering identical logical functionality in a SOIC-20 package. Other compatible devices within the 74HCT series may provide similar shift register capabilities, though pinout and package differences must be evaluated for direct substitution.