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The 74LS166 is a 16-bit parallel-in/parallel-out shift register manufactured by Panasonic. It is part of the 74LSxx series of low-power Schottky TTL integrated circuits. Description: The 74LS166 is a 16-bit serial-in/parallel-out shift register. It has a serial input (SIN) and a serial output (SOUT). The serial input is clocked in on the rising edge of the clock (CP) and shifted out on the falling edge of the clock. The 16-bit parallel output is available on the Q0-Q15 outputs. Features: rn Low-power Schottky TTL rn 16-bit serial-in/parallel-out shift register rn Serial input (SIN) and serial output (SOUT) rn Parallel output (Q0-Q15) rn Clock input (CP) Applications: The 74LS166 is commonly used in applications such as data transmission, data storage, and data manipulation. It is also used in digital logic circuits and digital signal processing. (For reference only)