Original Part
SRAM - Synchronous, SDR (ZBT) Memory IC 9Mbit Parallel 7.5 ns 165-CABGA (13x15)
Alternative Part
SRAM - Synchronous, SDR (ZBT) Memory IC 9Mbit Parallel 8.5 ns 165-CABGA (13x15)
SRAM - Synchronous, SDR (ZBT) Memory IC 9Mbit Parallel 8.5 ns 165-CABGA (13x15)
1. Substitution Conclusion for 71V65703S85BQG:
Given that the core electrical and physical characteristics—including package, voltage, capacity, and bus width—are identical, the key difference between the 71V65703S85BQG and the original 71V65703S75BQG lies in the access time, which has increased from 7.5ns to 8.5ns. This results in a slightly lower maximum operating speed and reduced timing margin. In systems operating at extremely high clock frequencies with stringent memory access timing requirements, a direct substitution carries a risk of timing violations. For such applications, a comprehensive timing re-verification is mandatory. However, for systems with sufficient clock frequency headroom or those not sensitive to peak performance, this part is a functionally compatible drop-in replacement.
2. Substitution Conclusion for 71V65703S85BQGI:
The primary difference for the 71V65703S85BQGI, compared to the original 71V65703S75BQG, is also the slower access time (8.5ns vs. 7.5ns). Furthermore, the suffix "I" typically denotes support for an industrial-grade temperature range (e.g., -40°C to +105°C, though the specific datasheet must be consulted for confirmation), whereas the original part is likely specified for a commercial range (e.g., 0°C to +70°C). While the substitute offers lower speed performance, it provides superior environmental robustness, specifically extended temperature operation capability. If the application has no special requirements for operating temperature range, the substitution must be evaluated for its performance impact. For applications in industrial, automotive, or other wide-temperature environments, the 71V65703S85BQGI becomes the more reliable choice, though timing validation accounting for the slower speed remains necessary.
Analysis ID: 39DA-5467000
Based on part parameters and for reference only. Not to be used for procurement or production.
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