Original Part
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-SSOP
Alternative Part
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-SSOP
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-TSSOP
1. 74FCT162H245ATPVC Substitution Conclusion
The 74FCT162H245ATPVC is fully compatible with the original part in terms of core logic function (non-inverting transceiver, bus width, tri-state outputs), supply voltage, and package (48-BSSOP), providing a basis for direct substitution. The key difference lies in its output drive capability (24mA/24mA), which is significantly lower than that of the original part (32mA/64mA, with low-level drive capability effectively halved). If the original circuit design relies on the higher drive strength of the original part to drive heavy capacitive loads or multiple loads while meeting stringent timing requirements, a direct substitution may introduce risks related to signal integrity (e.g., slower edge rates, insufficient overshoot) or insufficient timing margin. For lighter loads, however, this difference is generally acceptable.
2. 74FCT162H245CTPACT Substitution Conclusion
The 74FCT162H245CTPACT is compatible with the original part in core logic function, supply voltage, and pinout. However, it uses a narrower 48-TSSOP package (width: 6.10mm) compared to the original 48-BSSOP package (width: 7.50mm). While electrically functional as a replacement, a PCB layout modification is mandatory because the two packages share the same lead pitch but have different body widths; the original footprint will not physically accommodate the new device. Furthermore, its output drive capability (24mA/24mA) is also lower than the original part's, introducing the same drive strength and signal integrity considerations discussed for the previous device. This part is only suitable for new designs where a package change is permissible, or as a temporary functional debug substitute. It is not a true "drop-in" replacement for an unmodified design.
Analysis ID: 324C-6E41000
Based on part parameters and for reference only. Not to be used for procurement or production.
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