The listing, Sparkfun Bidirectional Logic Level Convertor has ended.
This auction is for one bi-directional logic level converter. It will convert from 3.3 to 5v or from 5 to 3.3v. it can also be used safely with 1.8 to 2.8v and vice versa. The dimensions are 0.63 inches x 0.52 inches. Each level converter has the capability of converting 4 pins on the high side to 4 pins on the low side with two inputs and two outputs provided for each side. The level converter is very easy to use. The board needs to be powered from the two voltages sources (high voltage and low voltage) that your system is using. High voltage (5V for example) to the ‘HV’ pin, low voltage (3.3V for example) to ‘LV’, and ground from the system to the ‘GND’ pin.