74ACT299MTCX

Shift Registers Overview

The onsemi 74ACT299MTCX is an 8-bit universal shift/storage register housed in a 20-lead TSSOP package. It features 3-state outputs and supports four operating modes: hold, shift left, shift right, and parallel load. The device operates within a supply voltage range of 4.5V to 5.5V and functions at temperatures from -40°C to +85°C. Outputs can source or sink up to 24 mA. Propagation delays are typically 8.5 ns at 5.0V with a 50 pF load.

Shift Registers Feature Summary

• Supports four operational modes including synchronous shift left, shift right, parallel load, and data storage.
• Features multiplexed parallel I/O pins to reduce total package pin count.
• Includes dedicated serial inputs and outputs for easy expansion and cascading.
• Provides TTL-compatible inputs for direct interface with standard logic circuits.

Shift Registers Applications

• Bus-oriented applications requiring 3-state output control
• Serial-to-parallel and parallel-to-serial data conversion systems
• Digital counters and timing sequence generators

Shift Registers Procurement Notes

Verify the specific ordering code suffix against manufacturer documentation to confirm tape and reel packaging availability. Ensure the selected variant matches the required package type and electrical specifications for your design. Cross-reference datasheet parameters with system requirements before finalizing procurement decisions.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with common parallel I/O is required to minimize pin usage. The ACT series offers TTL-compatible inputs suitable for 5V logic systems. Consider the 3-state outputs for bus sharing and the additional Q0/Q7 pins for serial expansion needs in complex digital designs.

Shift Registers Part Context

This part belongs to the AC/ACT299 family of universal shift/storage registers manufactured by Fairchild Semiconductor (now onsemi). It shares functional characteristics with other devices in the series but differs in input compatibility and speed. The MTCX suffix indicates the Thin Shrink Small Outline Package (TSSOP) form factor with tape and reel delivery.

Shift Registers Replacement Considerations

Compatible substitutes include the 74AC299MTCX for AC-speed performance and the 74ACT299SC for SOIC packaging. Verify pinout compatibility and electrical limits before substituting. Other manufacturers may offer equivalent parts under different numbering schemes.