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. 74FCT162245CTPAG Substitution Conclusion
Basic functionality is replaceable, but an assessment of drive capability and timing is required. This part is fully compatible with the original device in core functionality (bidirectional non-inverting transceiver, tri-state control) and supply voltage. The key difference lies in its symmetric but weaker output drive current (24mA / 24mA vs. the original's 32mA / 64mA). This implies a significantly lower capability, particularly in low-level sink current, for driving heavy loads such as high fan-out or long traces. In high-load applications, this may lead to signal integrity issues, including slower rise/fall times and reduced noise margin. Furthermore, the package changes from a wider 48-BSSOP (7.50mm) to a narrower 48-TFSOP (6.10mm), requiring verification of PCB pad compatibility or layout adjustments.
2. 74FCT16245CTPAG8 Substitution Conclusion
Electrical characteristics are directly compatible, making it a superior substitute. Only package compatibility needs confirmation. This device is identical to the original in all critical electrical parameters, including the asymmetric drive current (32mA / 64mA). Under identical load conditions, its switching speed and noise performance are expected to match the original, presenting a very low risk for functional replacement. The primary difference, again, is the package (original: 48-BSSOP, substitute: narrower 48-TFSOP). Direct soldering is not feasible. The design must ensure the new package's pinout aligns with the original and evaluate the adaptability of the existing PCB pad design.
Analysis ID: 99AF-DBBF000
Based on part parameters and for reference only. Not to be used for procurement or production.
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