SN74LS299DWR2

Shift Registers Overview

The SN74LS299DWR2 is an 8-bit universal shift and storage register manufactured by Texas Instruments, distributed by onsemi. It operates within a supply voltage range of 4.75 V to 5.25 V and features a propagation delay of 39 ns. The device utilizes bipolar logic from the LS series and provides two independent circuits with serial/parallel to serial/parallel counting sequences. It employs asynchronous reset functionality and offers 3-state outputs for effective bus driving. The component is housed in a 20-SOIC package suitable for surface mount installation.

Shift Registers Feature Summary

• Supports bidirectional shifting and parallel data loading capabilities
• Provides tri-state outputs for direct connection to system buses
• Includes asynchronous reset input for immediate state clearing

Shift Registers Applications

• Universal shift and storage register implementations
• Bidirectional data transfer between processing units
• Parallel-to-serial and serial-to-parallel conversion tasks

Shift Registers Procurement Notes

Verify that the manufacturer listed as Texas Instruments aligns with your supply chain requirements when purchasing through onsemi distribution channels. Confirm RoHS compliance status and specific packaging options such as tube quantities against your assembly line specifications. Ensure the 20-SOIC footprint matches your PCB design constraints before finalizing procurement orders.

Shift Registers Selection Notes

Select this component for applications requiring versatile data movement between parallel and serial domains. The LS logic family ensures compatibility with standard TTL interfaces while maintaining low power consumption characteristics. Consider the 39 ns propagation delay when designing high-speed timing paths to ensure signal integrity across the entire circuit board layout.

Shift Registers Part Context

This part belongs to the broader SN74LS299 family of universal shift registers. While the base model shares core functional attributes, the DWR2 suffix specifically denotes the surface-mount SOIC package variant. This configuration distinguishes it from through-hole DIP versions like the SN74LS299N, offering different mechanical mounting solutions for modern electronic assemblies.

Shift Registers Replacement Considerations

Publicly confirmed substitute part numbers include SN74LS299N for through-hole applications and SN74F299DWR for faster F-series performance. Verify pinout compatibility and electrical parameter differences before swapping components in existing designs.