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. 74FCT162245CTPACT Substitution Conclusion
Substitution is generally feasible, but attention must be paid to the asymmetrical drive strength and package compatibility. The key difference lies in the output drive current, which changes from 32mA/64mA (high/low) to a symmetrical 24mA/24mA. This reduces the low-level sink current capability. If the original design relied on the 64mA high-current drive for heavy loads, direct substitution could potentially lead to signal integrity or timing issues. The package changes from a 7.50mm wide SSOP to a 6.10mm wide TSSOP. While the pinout and pitch are compatible, the narrower body width requires verification of PCB pad layout and assembly clearance.
2. 74FCT162H245ATPACT Substitution Conclusion
Substitution is generally feasible, with the key considerations being identical to those for the 74FCT162245CTPACT. Both devices share identical critical parameters such as drive current, supply voltage, and logic function. The primary differences, again, are the output current (24mA/24mA vs. 32mA/64mA) and the package (TSSOP vs. SSOP) compared to the original target part. The "H" suffix may imply optimizations in internal silicon process or performance characteristics (e.g., speed, power consumption). However, as there is no difference in the core interface electrical specifications compared to the 74FCT162245CTPACT, the substitution feasibility assessment remains the same.
Analysis ID: 406F-CBCF000
Based on part parameters and for reference only. Not to be used for procurement or production.
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