Original Part
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-TSSOP
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. 74FCT162245ATPVCT Substitution Conclusion
The 74FCT162245ATPVCT can serve as a replacement for the original device, provided that logic functionality, supply voltage, and basic interface characteristics are consistent. However, two key differences must be noted: first, the output drive capability is reduced from the original 32mA (high) / 64mA (low) to a symmetrical 24mA/24mA. This weaker high‑level drive may affect signal integrity or load drive margin. Second, the package changes from a 6.10mm‑wide TFSOP to a 7.50mm‑wide BSSOP, with different mechanical dimensions and pad layout, requiring reassessment of PCB compatibility and soldering process. If the actual load current is below 24mA and board space permits the package change, direct substitution is feasible.
2. 74FCT162245CTPACT Substitution Conclusion
The 74FCT162245CTPACT is a closer alternative, as its package is fully compatible with the original (both are 6.10mm‑wide TFSOP). However, its output drive capability is also limited: both high‑ and low‑level output currents are 24mA, compared to the original 32mA/64mA. This represents a reduction in both high‑level sourcing and low‑level sinking capability. When driving heavy loads (e.g., multiple parallel lines or long traces), voltage drop or timing skew may occur. If the system’s actual load current remains within 24mA and high sinking current is not required, this device can be considered a pin‑compatible direct replacement; otherwise, signal quality and load matching should be verified.
Analysis ID: 2181-4040000
Based on part parameters and for reference only. Not to be used for procurement or production.
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