74AC299SJ

Shift Registers Overview

The onsemi 74AC299SJ is an 8-bit universal shift/storage register housed in a 20-lead Small Outline Package (SOP). It features common parallel I/O pins and 3-STATE outputs. The device operates within a supply voltage range of 2.0V to 6.0V and supports four modes: shift left, shift right, load, and store. Outputs source and sink 24mA. Propagation delays from clock to output are typically 14.5ns at 5.0V with 50pF load.

Shift Registers Feature Summary

• Common parallel I/O design reduces total package pin count by multiplexing inputs and outputs.
• Provides additional serial outputs for easy expansion and cascading of longer data words.
• Features 3-STATE outputs suitable for bus-oriented applications.

Shift Registers Applications

• Bus-oriented data storage systems
• Serial-to-parallel and parallel-to-serial conversion circuits
• Data buffering and shifting operations

Shift Registers Procurement Notes

Verify the specific ordering suffix 'SJ' corresponds to the 20-lead SOP package when sourcing. Confirm RoHS compliance status through official manufacturer documentation or component marking. Ensure the supply voltage requirements align with the target application's power rails before integration.

Shift Registers Selection Notes

Select this component for designs requiring an 8-bit register with shared input/output pins to minimize footprint. Consider the 74ACT299 variant if TTL-compatible input thresholds are required instead of standard CMOS levels. Evaluate the 3-STATE buffer capabilities against system bus impedance requirements.

Shift Registers Part Context

This part belongs to the 74AC logic family, characterized by high-speed CMOS technology. It serves as a functional equivalent to other universal shift registers within the industry-standard 74xx series architecture, providing synchronous data handling capabilities.

Shift Registers Replacement Considerations

The 74ACT299 is a compatible alternative offering TTL-compatible input thresholds while maintaining similar functionality and pinout configurations.