The 74LVC1T45 is a single-bit, dual-supply transceiver with 3-state outputs suitable for transmitting a single logic bit across different voltage domains.
The A input/output pin is designed to track VCCA while the B input/output tracks VCCB. This arrangement allows for universal low-voltage translation between any voltages from 1,65 V to 5,5 V.
The direction of the transceiver is controlled by the direction pin (DIR) that has logic threshold voltages related to VCCA. When a high logic level is applied to DIR the A pin becomes an input and the B pin becomes the output. Conversely the roles of A and B are reversed when DIR is asserted low.
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