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 Memory IC 9Mbit Parallel 117 MHz 7.5 ns 165-TFBGA (13x15)
1. 71V65703S85BQI Substitution Conclusion
This part is a viable direct replacement. It is sourced from the same manufacturer (Renesas) as the original component (71V65703S75BQ) and shares identical core technology (SDR ZBT), memory architecture, voltage specifications, and package (165-TBGA). The primary difference is a slightly degraded access time from 7.5 ns to 8.5 ns, which results in a marginally lower maximum operating frequency and a small increase in data read latency. For applications where the original design has sufficient timing margin or does not demand peak speed performance, this part can be considered a pin-compatible, functionally equivalent direct substitute. However, a thorough re-evaluation of the system timing requirements is necessary to ensure compliance.
2. IS64LF25636A-7.5B3LA3-TR Substitution Conclusion
This part represents a conditional substitution and requires careful evaluation. While it matches the original component in key parameters (9Mbit, 256K x 36, 7.5 ns, 3.3V, 165-TBGA), a critical difference exists in its specified "Technology." It is listed as a standard "Synchronous, SDR" device, whereas the original part is explicitly designated as "Synchronous, SDR (ZBT)." Consequently, this substitute may lack the Zero Bus Turnaround (ZBT) architecture characteristic. This could potentially introduce additional wait states during back-to-back read/write operation transitions. Although electrically and physically interface-compatible, it may not serve as a direct drop-in replacement in systems that rely on ZBT features for high-efficiency, continuous data throughput (e.g., networking or communication equipment). Verification of its actual read/write timing against the original system design is mandatory.
Analysis ID: 9EB5-6530000
Based on part parameters and for reference only. Not to be used for procurement or production.
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