74AC11004N is a 4-bit synchronous binary counter made by Texas Instruments. It is a CMOS TTL part, meaning it is compatible with both CMOS and TTL logic levels. It is synchronous, meaning that it responds simultaneously with other logic inputs present in a given system, and binary, meaning it increments in binary code (not decimal or hexadecimal code). It takes in a clock input and has four individually toggleable outputs that can be used to count up-to 15 (or 1111 in binary). It has a maximum clock frequency of 10 MHz and low power consumption. This makes it an excellent choice for applications that require fast response times while consuming low power.