The RD30LDT595 has eight edge trigger Dtype FlipFlops with eight latches in 16pin package. Data is input to the serial data input and the clock pulse is input to the clock input. When the clock is changed from "L" to "H", the signal of the data input enters an internal shift register. The data of the shift register is shifted one by one. In addition, output load circuit is added so that power supply prevents a wrong action in on/off. When Vcc is less than a fixed level, the output (Q1 to Q8) compulsorily is off state. Lowvoltage and highspeed operation is suitable for batterypowered product (e.g., notebook computers), and the lowpower consumption extends the battery life.