74LVC2T45

The 74LVC2T45 is a 2-bit, dual-supply bus transceiver with configurable voltage translation. The device has two separate configurable power-supply rails. The A and B ports track the VCCA supply and VCCB supply respectively. The supply voltage pins accept any voltage from 1.65V to 5.5V. This makes the device suitable for low voltage bidirectional translation voltage nodes of 1.8V, 2.5V, 3.3V, and 5V.

The 74LVC2T45 features that allows two data buses asynchronously communicated. Either the A port outputs or the B port outputs can be activated by DIR logic levels. The DIR input circuit is supplied by VCCA. When B port outputs are activated, the device allows the data to transmit from A bus to B bus. On the contrary, when A port outputs are activated, the device allows the data to transmit from B bus to A bus. The input circuit is always active on the two ports. A logic high or low must be set to avoid excessive supply current.