This 4-bit noninverting bus transceiver uses two separate configurable power-supply rails. The A port is designed to track VCCA. VCCA accepts any supply voltage from 0.9 V to 3.6 V. The B port is designed to track VCCB. VCCB accepts any supply voltage from 0.9 to 3.6 V. This allows for universal low-voltage bi-directional translation between any of the 0.9V, 1.2V, 1.5V, 1.8V, 2.5V, and 3.3V voltage nodes.