1. 74FCT162H245ATPVC Substitution Conclusion The 74FCT162H245ATPVC is fully compatible with the original part in terms of core logic functions (non-inverting transceiver, tri-state outputs), supply voltage, and package (48-BSSOP), making it a candidate for direct substitution. The key difference lies in output drive capability: the original part provides asymmetric drive (32 mA high, 64 mA low), whereas the TI variant offers symmetric drive (24 mA for both high and low levels). If the original circuit design relies on the strong 64 mA low-side current to drive heavy loads or meet specific timing requirements, the substitution may carry a risk of insufficient drive strength. This could result in increased signal rise/fall times, reduced noise margin, or unstable logic levels when driving multiple loads. In applications with light loading or where high drive current is not critical, this device can serve as a suitable replacement.