HEF4557BP.652 is an Integrated Circuit (IC) produced by NXP, a global semiconductor manufacturer. This particular IC is a dual 4-input positive and/or gates that utilizes CMOS technology. This chip is commonly used in applications that require two logic gates, each of which performs a logic operation when two or more inputs are present. It has a typical propagation delay time of 10 ns, a supply voltage range between 2 V and 8 V, and an operating temperature range between -55°C and 125°C. Once properly installed onto a circuit board, the HEF4557BP.652 can be used to create complex logic circuits.