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
Direct substitution of this part carries risk and is not recommended. The key discrepancy lies in its symmetrical output drive capability of 24mA/24mA, which is significantly lower than the original part's asymmetrical drive strength (32mA High, 64mA Low). When driving heavy loads—such as multi-drop parallel buses or long traces—particularly in applications requiring strong sink current (Low), this device may fail to provide sufficient drive strength. This can lead to degraded signal edge rates, reduced noise margin, or even logic-level errors. These issues become more pronounced under high-frequency or high-capacitive load conditions. Furthermore, its package (48-TFSOP) is narrower (6.10mm vs. 7.50mm) than the original (48-BSSOP), potentially causing PCB layout incompatibility.
2. 74FCT16245CTPAG8 Substitution Conclusion
This part is a highly viable direct substitute. Its core electrical parameters, including the asymmetrical output drive current (32mA High, 64mA Low) and supply voltage range (4.5V to 5.5V), are identical to the original part. This ensures seamless compatibility in terms of signal drive strength, switching speed, and DC electrical characteristics. The sole difference is its narrower 48-TFSOP package. Successful substitution requires verification that the existing PCB's land pattern design is compatible with this reduced body width. Provided the footprint is compatible or can be modified, this part serves as a fully functional and performance-equivalent replacement for the original.
Analysis ID: 6243-04E5000
Based on part parameters and for reference only. Not to be used for procurement or production.
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