74HC165D,652

Shift Registers Overview

The Nexperia 74HC165D,652 is an 8-bit parallel-in/serial-out shift register housed in a 16-lead SO plastic small outline package (SOT109-1). It operates on a supply voltage range of 2.0 V to 6.0 V and features asynchronous parallel loading via the active LOW PL input. The device provides complementary serial outputs (Q7 and Q7) and includes overvoltage tolerant inputs rated up to 15 V for HIGH-to-LOW level shifting applications.

Shift Registers Feature Summary

• Asynchronous 8-bit parallel load capability
• Complementary serial output configuration
• Input levels compatible with CMOS logic standards

Shift Registers Applications

• Parallel-to-serial data conversion
• HIGH-to-LOW level shifting applications
• Keyboard scanning circuits

Shift Registers Procurement Notes

Verify the specific ordering suffix matches the required package variant. Confirm that the component meets the intended operating temperature range requirements. Ensure compatibility with the target system's voltage levels and signal integrity specifications before finalizing procurement decisions.

Shift Registers Selection Notes

Select this component when an 8-bit parallel-to-serial interface is required within standard CMOS logic families. Consider the wide supply voltage flexibility and high noise immunity characteristics. Evaluate the package dimensions against available PCB real estate constraints.

Shift Registers Part Context

This part belongs to the 74HC series of high-speed CMOS logic devices manufactured by Nexperia USA Inc. The family offers low power dissipation and high noise immunity suitable for general-purpose digital logic applications requiring reliable data shifting operations.

Shift Registers Replacement Considerations

Cross-reference with other manufacturers offering equivalent 74HC165 variants. Verify pinout compatibility and electrical parameter alignment to ensure seamless integration without circuit redesign.

Shift Registers FAQ

What is the function of the CE input?

The clock enable (CE) input controls the shifting operation. When CE is LOW, data shifts on the LOW-to-HIGH transitions of the CP input. A HIGH state on CE disables the CP input.

How does the parallel load mechanism work?

When the parallel load (PL) input is held LOW, the data present at the D0 to D7 inputs is loaded asynchronously into the shift register regardless of the clock state.