74AVCH2T45GT,115

The 74AVCH2T45 is a dual bit, dual supply transceiver that enables bidirectional level translation.
It features two data input-output ports (nA and nB), a direction control input (DIR) and dual supply
pins (VCC(A) and VCC(B)). Both VCC(A) and VCC(B) can be supplied at any voltage between 0.8 V
and 3.6 V making the device suitable for translating between any of the low voltage nodes (0.8 V,
1.2 V, 1.5 V, 1.8 V, 2.5 V and 3.3 V). Pins nA and DIR are referenced to VCC(A) and pins nB are
referenced to VCC(B). A HIGH on DIR allows transmission from nA to nB and a LOW on DIR allows
transmission from nB to nA.
The device is fully specified for partial power-down applications using IOFF. The IOFF circuitry
disables the output, preventing any damaging backflow current through the device when it is
powered down. In suspend mode when either VCC(A) or VCC(B) are at GND level, both A and B are
in the high-impedance OFF-state.
The 74AVCH2T45 has active bus hold circuitry which is provided to hold unused or floating data
inputs at a valid logic level. This feature eliminates the need for external pull-up or pull-down
resistors.