74164 8-Bit Serial-In/Parallel-Out Shift Register (74HC164)

Description

74164 IC 8-Bit Serial-In Parallel-Out Shift Register The IC 74164 is an 8-bit serial-in parallel-out (SIPO) shift register. It accepts serial data at its two inputs (A and B), which are logically ANDed, and shifts it into the register on each clock pulse. The data moves from the first flip-flop to the last, and the outputs (Q0–Q7) provide parallel access to each stored bit. It features an asynchronous clear (CLR) that resets all outputs to LOW immediately, regardless of the clock. The 74164 is useful for data storage, serial-to-parallel conversion, and output line expansion. Its TTL logic ensures compatibility with standard digital circuits, and its high-speed design makes it suitable for applications like LED driving, display control, and data buffering. Pin Configuration (DIP-14) Pin Name Description 1 A Serial Data Input A 2 B Serial Data Input B 3 CLR Asynchronous Clear (active LOW) 4 CLK Clock Input 5 Q0 Output Bit 0 (first stage) 6 Q1 Output Bit 1 7 Q2 Output Bit 2 8 GND Ground 9 Q3 Output Bit 3 10 Q4 Output Bit 4 11 Q5 Output Bit 5 12 Q6 Output Bit 6 13 Q7 Output Bit 7 (last stage) 14 VCC +5V Power Supply Key Features 8-bit serial-in parallel-out operation Two serial inputs (A and B) with internal AND gate Asynchronous clear for immediate reset TTL-compatible logic levels High-speed shifting capability Standard DIP-14 or SOIC-14 package Applications Expand microcontroller output lines. Drive LED arrays or segment displays. Convert serial data streams to parallel form.