Antminer S17+ hash board U1 location SN74LVC1T45 Located in the Antminer S17 plus hash board U1 position is the SN74LVC1T45DBVR single-unit dual-supply bus transceiver, this single-bit non-inverting bus transceiver has configurable voltage translation and tri-state outputs, using two independently configurable power rails. The A port is designed to track V_CCA. V_CCA accepts any supply voltage from 1.65 V to 5.5 V. The B port is designed to track V_CCB. V_CCB accepts any supply voltage from 1.65 V to 5.5 V. This allows universal low voltage bidirectional translation between any 1.8V, 2.5V, 3.3V and 5V voltage nodes. Used for asynchronous communication between two data buses. A logic level at the direction control (DIR) input activates either the B port output or the A port output. When the B port output is activated, the device transfers data from the A bus to the B bus, and when the A port output is activated, the device transfers data from the B bus to the A bus. Input circuits are always active on ports A and B and must have logic high or low levels to prevent excess I_CC and I_CCZ. It is an application device that can be used in personal electronics, industry, enterprise, and telecommunications.