SN74HC164DT

Shift Registers Overview

The SN74HC164DT is an 8-bit parallel-out serial shift register manufactured by Texas Instruments in a 14-pin SOIC package. It operates within a supply voltage range of 2 V to 6 V and supports a free-air temperature range from -40°C to 125°C. The device features AND-gated serial inputs (A and B) and an asynchronous clear (CLR) input. Typical propagation delay is 20 ns, with output drive capabilities of ±4 mA at 5 V.

Shift Registers Feature Summary

• AND-gated serial inputs allow complete control over incoming data entry
• Asynchronous clear input resets all outputs immediately upon activation
• Fully buffered clock and serial inputs ensure signal integrity

Shift Registers Applications

• Programmable Logic Controllers
• Appliances
• Video Display Systems
• Output Expander

Shift Registers Procurement Notes

Verify the specific ordering suffix against the manufacturer's current Package Option Addendum. Confirm that the component status aligns with project requirements, as certain variants may be marked obsolete or not recommended for new designs. Ensure the selected package matches the intended PCB footprint and thermal management strategy.

Shift Registers Selection Notes

Select this component when an 8-bit serial-to-parallel conversion is required with low power consumption. Verify that the operating voltage falls within the 2 V to 6 V range and that the temperature rating meets environmental specifications. Consider the SOIC package dimensions for board space constraints.

Shift Registers Part Context

This part belongs to the SNx4HC164 family of 8-bit shift registers. It is designed to be pin-compatible with other logic families while offering CMOS performance characteristics. The device is suitable for applications requiring GPIO expansion and data serialization.

Shift Registers Replacement Considerations

SN74HC164DR

Shift Registers FAQ

How do the gated serial inputs function?

Data enters through inputs A and B, which are internally ANDed. A low level on either input inhibits data entry and resets the first flip-flop to low on the next clock pulse.

What triggers the data shift?

Data shifts occur on the low-to-high transition of the CLK pin. Data can be changed while CLK is high or low, provided setup time requirements are met.