The SN74LVCH8T245 is an 8-bit, dual supply noninverting voltage level translator. Pins A1 through A4, and the control pins (DIR and OE) are referenced to V_CCA, while pins B1 through B4 are referenced to V_CCB. Both the A port and B port can accept I/O voltages ranging from 1.65 V to 5.5 V. The high on DIR allows data transmission from Port A to Port B, and a low on DIR allows data transmission from Port B to Port A. For more information, see AVC Logic Family Technology and Applications.