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-TSSOP
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-TSSOP
1. 74FCT162245ATPAG Substitution Conclusion
Substitution is feasible, but the difference in drive capability requires evaluation. This device is fully compatible with the original part in core functionality (bidirectional non‑inverting transceiver, tri‑state outputs, supply voltage) and pinout. The differences lie in drive current (24mA vs. original 32mA/64mA) and package width (6.1mm TSSOP vs. 7.5mm SSOP). The symmetric drive current (24mA/24mA) provides more balanced fan‑out and noise immunity for both high and low levels. However, the significant reduction in low‑level drive capability (from 64mA down to 24mA) may lead to increased voltage drop and slower edges when driving heavy capacitive or low‑impedance loads. It is essential to verify whether the original load falls within the 24mA drive capability. The narrower package is PCB‑mount compatible, though thermal performance may differ slightly.
2. 74FCT162245CTPAG8 Substitution Conclusion
Substitution is feasible, with the same conclusion as for the 74FCT162245ATPAG. This variant shows no difference from the “ATPAG” version in key parameters provided (drive current, package, supply voltage). Typically, suffix variations (e.g., CTPAG8) may indicate different production lots, temperature ranges (though not reflected in the parameters), or packaging methods, and do not affect basic electrical performance or package compatibility. Regarding drive current (24mA symmetric output) and package width (6.1mm TSSOP), the technical differences and their implications relative to the original part are identical to those described for the ATPAG type above. The same evaluation of load drive capability must be performed when substituting.
Analysis ID: EFD2-15DF000
Based on part parameters and for reference only. Not to be used for procurement or production.
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