Original Part
Transceiver, Non-Inverting 2 Element 8 Bit per Element 3-State Output 48-TSSOP
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. 74FCT162245ATPACT Substitution Conclusion
From the perspective of core logic function, supply voltage, and package, this part can serve as a direct substitute for the original device. However, a key technical difference exists: the original device features an asymmetrical output drive of 32mA (source) / 64mA (sink), while this TI device offers a symmetrical 24mA/24mA drive. In applications requiring high sink current (low-level drive), such as driving heavy loads or multiple bus lines, the substitute's sink current capability (24mA) is only 37.5% of the original's (64mA). This reduction may not provide equivalent noise margin or drive strength, posing a risk of degraded signal integrity or failure to drive the load correctly. For standard applications with light loads, this difference is less significant.
2. 74FCT162245CTPACT Substitution Conclusion
This device is identical to the ATPACT variant in all provided specifications. It is likewise a functional, voltage, and package-compatible substitute for the original part and presents the same output drive current discrepancy (24mA symmetrical vs. 32mA/64mA asymmetrical). Typically, the "A" and "C" suffixes in TI part numbers indicate different temperature grades (e.g., commercial vs. industrial) or other internal process/performance classifications, though this is not reflected in the provided parameter table. While their DC parameters may be identical, there could be unlisted subtle differences in switching speed, power consumption, or operating temperature range. It is essential to consult the specific datasheet before substitution to confirm that key specifications, such as the operating temperature range, meet the original design requirements.
Analysis ID: 9CA3-B217000
Based on part parameters and for reference only. Not to be used for procurement or production.
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