Check the listing for details. New (128pcs) M74HC4049B1R ST MICROELECTRONICS IC Logic. Condition: New. Listed at 25.09 USD. These integrated circuits are new and unused, suitable for a variety of digital logic applications. Part Number: M74HC4049B1R. Refer to the official datasheet for detailed technical information. Typical Applications: These ICs are commonly used in digital logic circuits, signal processing, and general electronic design projects where high-speed CMOS logic is required.