The SN74LS541N is a high-speed 4-bit bi-directional universal shift register (USR) manufactured by Texas Instruments. It is a low-power device and has 4 data input ports D0-D3, 4 data output ports Q0-Q3, two clock inputs CP and CP’, and two control inputs DIR and E1. The SN74LS541N is designed for use in synchronous and asynchronous serial-data transmission and reception applications, and it has a wide range of applications, including: shift registers, serial-in/parallel-out, and 4-bit data buffer. The SN74LS541N has a wide operating temperature range from -55°C to 125°C and is available in 16-pin SOIC, 16-pin PDIP, and 16-pin SOP packages.