74HCT164D-Q100J

Shift Registers Overview

The Nexperia 74HCT164D-Q100J is an 8-bit serial-in, parallel-out shift register qualified to AEC-Q100 Grade 1 for automotive use. It features two gated serial data inputs (DSA and DSB) and eight parallel outputs (Q0–Q7). Data shifts on LOW-to-HIGH clock transitions, with an active LOW master reset clearing the register. The HCT variant operates at a supply voltage of 4.5 V to 5.5 V, accepting TTL input levels. It is housed in a 14-lead SO plastic small outline package (SOT108-1) and functions within an ambient temperature range of -40 °C to +125 °C.

Shift Registers Feature Summary

• Automotive qualification compliant with AEC-Q100 Grade 1 standards
• Gated serial data inputs allowing either pin to act as an enable control
• Asynchronous master reset function that forces all outputs LOW independently of other inputs
• Input clamp diodes enabling interface to voltages exceeding VCC using current limiting resistors

Shift Registers Applications

• Automotive electronic systems requiring robust logic shifting
• Industrial applications operating across extended temperature ranges
• General-purpose serial-to-parallel data conversion circuits

Shift Registers Procurement Notes

Verify the specific suffix 'J' against the manufacturer's official ordering information to confirm packaging details such as reel size or tape specifications. Ensure the design utilizes the correct HCT voltage range (4.5 V to 5.5 V) rather than the HC range. Confirm the SO14 package type matches the PCB footprint requirements before finalizing procurement orders.

Shift Registers Selection Notes

Select this component when TTL-compatible input levels are required for the shift register interface. The device is appropriate for designs needing an asynchronous clear function and dual serial inputs for gating purposes. Consider the wide operating temperature range if the application environment exceeds standard commercial limits. Verify that the 14-SO package dimensions fit the available board space constraints.

Shift Registers Part Context

This part belongs to the Nexperia 74HC/HCT164-Q100 family of 8-bit shift registers. The 'HCT' designation indicates compatibility with TTL logic levels, distinguishing it from the standard HC series which uses CMOS levels. The '-Q100' suffix denotes automotive qualification, while 'D' specifies the SO14 package and 'J' typically refers to the specific packing method defined by the manufacturer.

Shift Registers Replacement Considerations

Check for direct equivalents within the same family, such as the 74HC164D-Q100J, noting the difference between HCT and HC input voltage thresholds. Other manufacturers may offer pin-compatible alternatives, but verify electrical characteristics and automotive qualification status separately.

Shift Registers FAQ

How do the dual serial inputs DSA and DSB function?

Either DSA or DSB can serve as the primary data input, while the other acts as an active HIGH enable gate for data entry through the first input.

What is the effect of the Master Reset (MR) input?

A LOW signal on the MR input asynchronously clears the register, forcing all parallel outputs (Q0 to Q7) to a LOW state regardless of the clock or data inputs.

Can the inputs handle voltages higher than the supply voltage?

Yes, the inputs include clamp diodes that allow the use of current-limiting resistors to interface with voltages exceeding VCC.