74AHC164D,118

Shift Registers Overview

The Nexperia 74AHC164D,118 is an 8-bit serial-in/parallel-out shift register housed in a 14-lead SO plastic small outline package (SOT108-1). It operates within a supply voltage range of 2.0 V to 5.5 V and supports ambient temperatures from -40 °C to +125 °C. The device features two serial data inputs (DSA and DSB) that function as active HIGH enables for data entry through the other input. Data shifts on LOW-to-HIGH clock transitions, while an active LOW master reset clears all outputs. Inputs are overvoltage tolerant up to 5.5 V.

Shift Registers Feature Summary

• Features Schmitt-trigger action at all inputs for tolerance of slower rise and fall times.
• Includes overvoltage tolerant inputs allowing use as translators in mixed voltage environments.
• Provides latch-up performance exceeding 100 mA per JESD 78 Class II Level A.

Shift Registers Applications

• Serial-to-parallel data conversion
• Mixed voltage level translation
• General-purpose shift register applications

Shift Registers Procurement Notes

Verify the specific ordering suffix matches the required package type, as the 74AHC164 family includes multiple options such as TSSOP14 and DHVQFN14. Confirm the temperature range specification aligns with system requirements, noting the standard -40 °C to +125 °C rating. Ensure compatibility with the intended logic family levels, specifically CMOS for the AHC variant.

Shift Registers Selection Notes

Select this component when an 8-bit shift register with parallel output is required in a surface-mount SOIC package. The AHC series offers high noise immunity and balanced propagation delays suitable for general digital logic. Consider the AHCT variant if TTL input levels are necessary instead of CMOS levels. Verify power dissipation limits against the total load capacitance and operating frequency.

Shift Registers Part Context

This part belongs to the Nexperia 74AHC/AHCT164 family of 8-bit serial-in/parallel-out shift registers. The 'D' designation indicates the SO14 plastic small outline package (SOT108-1), distinguishing it from the PW (TSSOP14) or BQ (DHVQFN14) package variants. The '118' suffix typically denotes reel packaging specifications.

Shift Registers FAQ

How do the dual serial inputs function?

The device has two serial data inputs, DSA and DSB. Either input can serve as an active HIGH enable for data entry through the other input, allowing flexible serial data loading configurations.

What triggers the data shift operation?

Data is shifted into the register on the LOW-to-HIGH transitions of the clock (CP) input.