1.74FCT16245ETPAG Substitution Conclusion The 74FCT16245ETPAG can serve as a drop-in replacement for the original 74FCT16245TPVCG4, with full compatibility in core logic functionality. Both devices are non-inverting, dual 8-bit, three-state transceivers, and share identical key electrical parameters, including a supply voltage range of 4.5V to 5.5V and output current ratings of 32mA/64mA. The primary difference lies in the package footprint: the original part is housed in a 48-BSSOP package with a width of 7.50mm, while the substitute uses a 48-TFSOP package with a width of 6.10mm. This results in a smaller board area for the replacement device. However, it is necessary to verify that the PCB layout—specifically the pad pattern and the available mounting clearance—is compatible with the smaller package. Provided the difference in package dimensions is acceptable within the board design, this substitution is functionally and electrically equivalent.