74HC299D,652

Shift Registers Overview

The Nexperia 74HC299D,652 is an 8-bit universal shift register with 3-state outputs housed in a SO20 (SOT163-1) package. It contains eight edge-triggered D-type flip-flops and interstage logic for synchronous shift-right, shift-left, parallel load, and hold operations. The I/O0 to I/O7 pins serve as multiplexed inputs/outputs. Supply voltage ranges from 2.0 V to 6.0 V. Propagation delay from CP to Q0/Q7 is typically 24 ns at 4.5 V. Maximum clock frequency is 45 MHz at 4.5 V.

Shift Registers Feature Summary

• Multiplexed I/O lines provide improved bit density by allowing data input and bus driver output functionality on the same pins.
• Four operating modes including shift left, shift right, hold, and parallel load determined by mode select inputs S0 and S1.
• Asynchronous master reset input overrides mode select and clock inputs to reset all flip-flops immediately.

Shift Registers Applications

• Data storage and transfer in digital systems
• Bus driver applications requiring tri-state control
• Serial-to-parallel and parallel-to-serial conversion circuits

Shift Registers Procurement Notes

Verify the specific ordering suffix against current Nexperia documentation to confirm package type and temperature range. Confirm availability status as manufacturing changes may occur. Ensure design compliance with absolute maximum ratings before integration.

Shift Registers Selection Notes

Select this component when an 8-bit universal shift register with tri-state outputs is required. Verify that the supply voltage range of 2.0 V to 6.0 V matches the system requirements. Check propagation delay specifications against timing constraints for the target clock frequency.

Shift Registers Part Context

This device belongs to the 74HC family of high-speed CMOS logic products manufactured by Nexperia. It provides standard logic functions compatible with various digital interfaces. The product data sheet defines its electrical characteristics, pin configurations, and functional behavior for design implementation.

Shift Registers Replacement Considerations

Check for equivalent part numbers within the 74HC299 family or other manufacturers offering identical pinouts and logic functions. Verify compatibility with existing board layouts and signal integrity requirements before substitution.