This 4-bit non-inverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 1.2 V to 3.6 V. VCCB accepts any supply voltage from 1.2 V to 3.6 V. The N74AVC4T774 is optimized to operate with VCCA/VCCB set at 1.4 V to 3.6 V.