1. SN74ABT16245ADLR Substitution Conclusion The SN74ABT16245ADLR is compatible with the original part 74ABT162245ADGG:11 in core parameters such as logic function and supply voltage. However, two critical differences exist: first, its package is a 48-BSSOP (width 7.50mm), whereas the original is a 48-TFSOP (width 6.10mm). The larger physical footprint prevents direct insertion into the same PCB pads, requiring a layout redesign. Second, its low-level output current drive is specified at 64mA, significantly higher than the original’s 12mA. This indicates stronger sink capability when pulling a line low, but may also lead to higher power dissipation and increased thermal management demands. Substitution is not feasible unless the board can accommodate the wider package and the system can tolerate the higher current.