Complex sentence: Typically, the external circuitry employs sequential logic to control ALU operation, which is paced by a clock signal of a sufficiently low frequency to ensure enough time for the ALU outputs to settle under worst-case conditions.
Split into simpler sentences: Typically, the external circuitry employs sequential logic to control ALU operation. The sequential logic is paced by a clock signal of sufficiently low frequency to ensure sufficient time for the ALU outputs to settle under worst-case conditions.