74LVC16T245

The 74LVC16T245 is a 16-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 V_CCA supply and V_CCB supply respectively. The supply voltage pins accept voltage range from 1.65V to 5.5V, which makes the device suitable for low voltage bidirectional translation voltage nodes of 1.8V, 2.5V, 3.3V and 5.0V. 

The 74LVC16T245 features that two data buses can communicate asynchronously. nDIR is the direction control input and nOE is the output enable input. The nDIR and nOE logic levels can control either the A port outputs or the B port outputs to be activated, or all outputs to be in high-impedance state. The nDIR and nOE pins are supplied by V_CCA. 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 level of high or low must be set to avoid excessive supply current. The V_CC isolation can allow both nAn and nBn are in high-impedance state when either V_CCA or V_CCB input is at GND level. 

This device is highly suitable for partial power-down applications by using power-off circuit. When the device is powered down, the outputs are disabled, and the current backflow can be prevented from passing through the device. 

The 74LVC16T245 is available in Green SSOP-48 and TSSOP-48 packages. It operates over a temperature range of -40℃ to +125℃.