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
From the perspective of core logic function, supply voltage, and direction control, this part can serve as a substitute for the original component. Two critical limitations exist. First, the output drive current differs. The original part features asymmetric drive currents of 32mA (high) and 64mA (low), whereas the substitute offers symmetric 24mA/24mA drive. The substitute's low-level sink current capability is significantly reduced (from 64mA to 24mA). When driving heavy loads (e.g., multi-drop parallel buses, long traces), this may cause an increase in the low-level output voltage (VOL), potentially impacting noise margin or load capacity. A reassessment of the load conditions is required. Second, the package is incompatible. The original part uses a 48-BSSOP package (7.50mm wide), while the substitute is in a 48-TSSOP package (6.10mm wide). Their footprints are entirely different, preventing direct soldering onto the existing PCB. A board redesign is mandatory.
2. 74FCT162245CTPAG8 Substitution Conclusion
This part is identical to the "ATPAG" variant in all listed parameters; therefore, the substitution conclusion is the same: logical functionality is compatible, but the substitution is subject to the same technical limitations of reduced output drive current and incompatible package size. The distinction between the "C" and "A" suffixes typically indicates minor internal manufacturer variations in speed, power consumption, or process (e.g., the "C" version may have slightly faster or slower propagation delays), which are not reflected in the provided basic parameters. For any practical substitution, it is essential to consult the detailed datasheets for both parts to verify that key dynamic parameters (such as propagation delay and switching characteristics) fully meet the original system's timing requirements before finalizing feasibility.
Analysis ID: 4CAA-8107000
Based on part parameters and for reference only. Not to be used for procurement or production.
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