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-SSOP
1. CY74FCT162245ATPVC Substitution Conclusion
The CY74FCT162245ATPVC can serve as a replacement for the original 74FCT16245ETPVG8, provided the output current requirements are carefully evaluated. The key difference lies in the output drive capability: the original device specifies a high-level output current (I_OH) of 32mA and a low-level output current (I_OL) of 64mA, whereas the CY74FCT162245ATPVC provides a symmetrical drive of 24mA for both I_OH and I_OL. The weaker drive strength of the CY74FCT162245ATPVC, particularly the significantly reduced I_OL, may be insufficient for high-load applications demanding substantial sink current, such as driving heavily loaded multi-point buses or high capacitive loads. Substitution is viable only if the load currents in the original design remain within 24mA and signal integrity margins are not critical. Otherwise, risks include signal attenuation, timing degradation, or potential device overheating. Other critical parameters—supply voltage range (4.5V to 5.5V), logic function (non-inverting transceiver), and package (48-BSSOP)—are identical, ensuring physical and basic electrical compatibility. However, the output current disparity remains the primary limiting factor for substitution.
2. CY74FCT162245TPVC Substitution Conclusion
The feasibility conclusion for substituting the original 74FCT16245ETPVG8 with the CY74FCT162245TPVC is similar to that for the CY74FCT162245ATPVC, with the output current difference being the critical focus. The discrepancy is again in drive strength: the original part offers I_OH/I_OL of 32mA/64mA, compared to the symmetrical 24mA/24mA of the CY74FCT162245TPVC. The lower drive capability of the CY74FCT162245TPVC, especially on the low-side, may compromise performance in heavy-load or high-noise environments, such as bus driver applications. Replacement is acceptable only if the application's load current demand does not exceed 24mA and the system tolerates relaxed signal slew rates. Otherwise, signal integrity risks or long-term reliability concerns may arise. Parameters including supply voltage, package, and logic function are consistent, supporting basic compatibility. Nevertheless, the output current difference defines the practical scope for substitution.
Analysis ID: CF1F-B387000
Based on part parameters and for reference only. Not to be used for procurement or production.
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