The XINLUDA XD74LS51 is an integrated circuit (IC) designed for use in digital circuit applications. It is part of the 74-Series, which are achronological ICs designed to offer high performance logic and TTL operating compatibility. The XD74LS51 is packed in a standard dual in-line package (DIP) that occupies 14 pins on the board. It is designed to meet RoHS compliance, which ensures it is free from hazardous materials. The XD74LS51 supports various logic functions such as AND, OR, NAND, NOR, and EXOR/EXNOR. Additionally, it has an in-built 3-state buffer, which allows it to receive different instructions and signals from other components connected to it. The XD74LS51 can be used to create complex logic circuits such as timers, flip-flops, and counters. Its low-power design also makes it suitable for use in portable electronic devices.