SN74HC164N

Shift Registers Overview

The SN74HC164N is an 8-bit parallel-out serial shift register manufactured by Texas Instruments. It operates within a supply voltage range of 2 V to 6 V and features AND-gated serial inputs (A and B) alongside an asynchronous clear (CLR) input. The device utilizes CMOS technology with fully buffered clock and serial inputs, providing low power consumption and high noise immunity. It supports data transfer on the positive edge of the clock signal and includes direct clearing functionality.

Shift Registers Feature Summary

• Features AND-gated serial inputs for complete control over incoming data entry
• Includes an asynchronous clear input that immediately resets all registers to a low level
• Provides eight parallel outputs capable of driving up to 10 LSTTL loads
• Operates with low power consumption and minimal input current requirements

Shift Registers Applications

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

Shift Registers Procurement Notes

Verify the specific package type matches the required PCB footprint, as the SN74HC164 series is available in multiple configurations including SOIC, TSSOP, and PDIP. Confirm the operating temperature range aligns with the intended application environment, noting that commercial variants typically support -40°C to 125°C. Ensure compliance with relevant environmental standards such as RoHS if applicable to the manufacturing process.

Shift Registers Selection Notes

Select this component when an 8-bit serial-to-parallel conversion is required with simple gating logic. The HC164 is suitable for applications needing to expand output lines from a microcontroller or logic system. Consider the PDIP package for through-hole mounting requirements. Evaluate the propagation delay characteristics against the system clock speed to ensure timing margins are met during operation.

Shift Registers Part Context

This part belongs to the SNx4HC164 family of 8-bit parallel-out serial shift registers. The 'N' suffix specifically denotes the 14-pin Plastic Dual In-Line Package (PDIP). This family is designed for general-purpose digital logic applications requiring reliable data shifting capabilities within standard CMOS voltage ranges.

Shift Registers Replacement Considerations

SN74HC164D

Shift Registers FAQ

How does the AND-gated serial input function?

Data enters the first flip-flop only when both serial inputs A and B are high. If either input is low, the entry of new data is inhibited, and the first flip-flop is reset to the low level at the next clock pulse.

What triggers the data shift in the SN74HC164N?

Data is clocked into the register on the low-to-high-level transition of the CLK pin. Data at the serial inputs can be changed while the clock is high or low, provided minimum setup time requirements are met.