If you are looking for a simple device that can store state information, look no further than Fairchild Semiconductor"s MM74HCT74MTC flip flop device. It has a differential output signal. This flip flop has a minimum operating temperature of -40 °C and a maximum of 85 °C. This product comes in rail packaging to keep individual parts separated and protected. It has 2 channels per chip. This inverting/non-inverting device has a typical operating supply voltage of 5 V. Its minimum operating supply voltage of 4.5 V, while its maximum is 5.5 V.