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
This part can serve as a functional substitute, but the risk of degraded drive capability must be evaluated. The key difference lies in its symmetrical reduction of output drive current from the original 32mA (high-level) / 64mA (low-level) to 24mA/24mA. Its ability to drive heavy capacitive or resistive loads, particularly its low-level output (sink current) capability, is significantly weakened. When driving multiple loads, long cables, or low-impedance inputs, it may fail to guarantee specified signal rise/fall times or maintain voltage level integrity. This poses a risk of insufficient system timing margin or communication errors. All other core functionalities (logic, voltage levels, enable control) and the package (48-BSSOP) remain fully compatible.
2. 74FCT162H245CTPACT Substitution Conclusion
This part is a conditional substitute. Beyond assessing the drive capability risk, the physical package compatibility issue must be resolved. There are two technical differences: First, the output drive current is symmetrically reduced to 24mA/24mA, identical to the part above, carrying the same drive capability risks. Second, the package has changed from the original 48-BSSOP (wide body, 7.50mm) to a narrower 48-TSSOP (narrow body, 6.10mm). The PCB footprint layouts are incompatible, preventing direct drop-in replacement. Therefore, substitution necessitates a board redesign. It is not suitable as a direct "drop-in" alternative for existing products and should only be considered for new designs or where board modifications are permissible.
Analysis ID: C9B7-621B000
Based on part parameters and for reference only. Not to be used for procurement or production.
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