The 74HC164 and 74HCT164 from Nexperia are 8-bit serial-in, parallel-out shift registers designed for a wide array of applications ranging from signal processing to data management systems. These components feature two serial data inputs (DSA and DSB) and eight parallel data outputs (Q0 to Q7), supporting versatile data handling by allowing serial data entry through either input pin. They operate on a supply voltage range of 2.0 to 6.0 V, ensuring compatibility with both CMOS and TTL levels—specifically, the 74HC164 operates at CMOS level while the 74HCT164 is designed for TTL level inputs. Key functionalities include gated serial data inputs, an asynchronous master reset for clearing the register, and a clock input that triggers data shifting on LOW-to-HIGH transitions. Manufactured by Nexperia, a leader in semiconductor solutions, these components exhibit high noise immunity and low power dissipation, making them ideal for high-reliability applications. Furthermore, they come in a variety of packages including SO14, TSSOP14, and DHVQFN14, catering to diverse design requirements. The 74HC164 and 74HCT164 are specified to operate in a broad temperature range, ensuring reliable performance in both commercial and industrial environments. With ESD protection exceeding 2000 V according to the HBM JESD22-A114F and MM JESD22-A115-A standards exceeding 200 V, these shift registers offer a robust solution for serial-to-parallel data conversion needs.