Integrated circuit including current-controllable buffer

PURPOSE: An integrated circuit including a buffer is provided to prevent overcurrent flowing in an integrated circuit by increasing the amount of current flowing inside the integrated circuit. CONSTITUTION: In an integrated circuit including a buffer, a speed information generation unit generates speed information signal which includes operation speed information. A buffer controls current in response to the speed information signal. A buffer part comprises first and second current paths. The first current path flows current in the buffer when the buffer is activated. A second current path flows current in the buffer in response to the speed information signal. A latency decoder(210A) generates latency information. A signal generator(220C) activates the speed information signal.