Original Part
Alternative Part
1. 24AA64T-I/ST Substitution Conclusion
The 24AA64T-I/ST is fully compatible with the original M24C64-FDW6TP in terms of memory capacity (64 Kbit), organization (8K × 8), I²C interface, supply voltage range (1.7 V to 5.5 V), and package (8-TSSOP). Therefore, from a basic compatibility standpoint, it can be considered a direct drop-in replacement. The key differences lie in its lower maximum clock frequency (400 kHz vs. 1 MHz) and slower access time (900 ns vs. 450 ns). This may lead to a noticeable reduction in data transfer rate and increased read latency. If the original application relies on high-frequency clock operation for fast read/write cycles—such as in high-speed data logging or real-time processing—the substitution could introduce system bottlenecks or timing violations. However, if the application does not demand high speed and the host controller can adapt to a 400 kHz clock, the substitution is feasible. A performance impact assessment is recommended.
2. BR24S64FVT-WE2 Substitution Conclusion
The BR24S64FVT-WE2 matches the original device in key specifications including memory size (64 Kbit), interface (I²C), voltage range (1.7 V to 5.5 V), and package (8-TSSOP), providing the fundamental conditions for substitution. The main deviation is its maximum clock frequency of only 400 kHz, significantly lower than the original’s 1 MHz. Although the access time is not explicitly specified, it is typically associated with the lower clock frequency, implying potentially slower read response. In applications requiring high bandwidth or low latency—such as high-speed communication or frequent access scenarios—the substitute may fail to meet performance demands and could even cause communication failures. If the application operates below 400 kHz and has relaxed timing requirements, the substitution may be acceptable. However, actual access time should be verified to ensure system stability.
Analysis ID: EB09-E080000
Based on part parameters and for reference only. Not to be used for procurement or production.
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