NXP 74AHC164PW: 8-Bit Serial-In/Parallel-Out Shift Register for High-Speed Logic Applications

The NXP 74AHC164PW is a high-performance, 8-bit serial-in/parallel-out shift register designed to meet the demands of modern high-speed digital systems. As part of the Advanced High-Speed CMOS (AHC) family, this IC combines low power consumption with robust output drive capability, making it an ideal choice for applications ranging from data storage and transfer to I/O expansion and serial-to-parallel conversion.

Housed in a TSSOP-14 package, the 74AHC164PW offers a compact footprint suitable for space-constrained PCB designs. It features two serial data inputs (DSA and DSB) that are ANDed together, providing flexibility in data input control. A Master Reset (MR) pin allows all outputs to be asynchronously set to a low state, ensuring immediate system initialization when required. The device operates over a broad voltage range (2 V to 5.5 V), enabling compatibility with various logic levels in mixed-voltage environments.

One of the key strengths of this shift register is its high-speed operation, with typical propagation delays of just 6 ns at 5 V, facilitating efficient data shifting in timing-critical applications. The serial-in/parallel-out functionality enables a single data stream to be converted into multiple parallel outputs, significantly reducing the number of microcontroller GPIO pins required to drive multiple devices such as LEDs, displays, or relays. This makes it exceptionally useful in multiplexed display systems, data communication modules, and industrial control systems.

The AHC technology ensures that the device maintains low static and dynamic power dissipation while offering improved noise immunity. Additionally, the balanced propagation delays and low output skew enhance signal integrity in high-frequency applications. The outputs can source or sink up to 8 mA, providing sufficient current to drive various loads directly.

ICGOOODFIND: The NXP 74AHC164PW is a versatile and efficient solution for expanding digital I/O capabilities with minimal pin count. Its high-speed performance, compact packaging, and reliable operation make it a fundamental component in designing advanced logic systems for consumer electronics, automotive, and industrial applications.

Keywords:

Shift Register

Serial-In/Parallel-Out

High-Speed CMOS

Data Storage

I/O Expansion