74ACT299SCX

Overview

The onsemi 74ACT299SCX is an 8-bit universal shift/storage register featuring common parallel I/O pins and 3-state outputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports temperatures from -40°C to +85°C. The device provides four modes: hold, shift left, shift right, and load data. Outputs source/sink 24 mA with TTL-compatible inputs. Propagation delays (CP to Q) are typically 8.5 ns at 5.0 V with 50 pF load.

Feature Summary

• Supports four operating modes including shift left, shift right, parallel load, and store.
• Features common parallel I/O pins to reduce total package pin count.
• Includes additional serial inputs and outputs for easy expansion.
• Provides 3-state outputs suitable for bus-oriented applications.

Applications

• Bus-oriented data storage systems
• Serial-to-parallel and parallel-to-serial conversion circuits
• Digital signal processing data buffering

Procurement Notes

Verify the specific ordering code suffix against manufacturer documentation to confirm package type and tape/reel availability. Confirm RoHS compliance status through official environmental documents. Ensure the component meets required temperature ranges and electrical specifications for the target application environment before procurement.

Selection Notes

Select this component when an 8-bit universal shift register with shared I/O pins is required. Verify that the 4.5 V to 5.5 V supply voltage aligns with system power rails. Consider the 3-state output capability for bus sharing requirements. Check setup and hold times relative to clock frequency constraints.

Part Context

This part belongs to the 74ACT family of logic devices, designed for high-speed CMOS applications with TTL-compatible inputs. The 74ACT299 specifically addresses needs for versatile data handling in digital systems. It serves as a core component for memory addressing and data path management in complex integrated circuits.

Replacement Considerations

Check for direct equivalents such as MC74ACT299 or other manufacturers' 74ACT299 variants. Verify pinout compatibility and electrical characteristics match the original design requirements. Ensure functional equivalence in all four operating modes before substitution.