NXP 74AHC164D: An 8-Bit Serial-In, Parallel-Out Shift Register for High-Speed Logic Applications

The NXP 74AHC164D is a high-performance, 8-bit serial-in, parallel-out shift register designed for use in high-speed logic systems. As part of the Advanced High-Speed CMOS (AHC) family, this IC combines low power consumption with robust noise immunity and wide operating voltage range from 2.0 V to 5.5 V, making it suitable for a variety of applications, from industrial controls to consumer electronics.

Functionally, the device features two serial data inputs (DSA and DSB) that are ANDed together, allowing for flexible data input control. On each low-to-high transition of the clock input (CP), data is shifted one bit through the register. An asynchronous master reset (MR) input, when held low, clears all flip-flops independently of the clock, ensuring immediate and reliable system initialization.

A key advantage of the 74AHC164D is its high-speed operation with typical propagation delays of only 7 ns at 5 V, enabling efficient data transfer in timing-critical systems. The buffered outputs enhance signal integrity, allowing the device to drive up to 50 pF of capacitive load while maintaining stability. Its low static power consumption makes it ideal for battery-powered devices, while its compatibility with TTL levels ensures easy integration into mixed-voltage systems.

Common applications include serial-to-parallel data conversion, LED matrix control, I/O expansion for microcontrollers, and data processing in communication interfaces. The SOIC-14 package offers a compact footprint for space-constrained PCB designs.

ICGOOODFIND: The 74AHC164D from NXP stands out as a reliable and efficient solution for high-speed serial data shifting, offering an optimal blend of speed, low power, and integration ease for modern digital designs.

Keywords: Shift Register, Serial-In Parallel-Out, High-Speed CMOS, Low Power Consumption, Voltage Translation.