Original Part
SRAM - Synchronous, SDR Memory IC 9Mbit Parallel 117 MHz 7.5 ns 165-TFBGA (13x15)
Alternative Part
SRAM - Synchronous, SDR (ZBT) Memory IC 9Mbit Parallel 7.5 ns 165-CABGA (13x15)
SRAM - Synchronous, SDR (ZBT) Memory IC 9Mbit Parallel 7.5 ns 165-CABGA (13x15)
1. 71V65703S75BQ Substitution Conclusion
From a core parameter perspective, this part number is identical to the original in terms of density, bit width, speed, voltage, and physical package (165-ball, 13x15mm BGA). It is therefore a potential physical and basic electrical drop-in replacement. The critical difference lies in its technology type: it is specified as "SDR (ZBT)", whereas the original is a standard "SDR". Their read/write operation protocols and timing are fundamentally different. The ZBT (Zero Bus Turnaround) protocol is designed to eliminate idle cycles during read-to-write or write-to-read transitions, which requires the host controller (MCU or FPGA-based SRAM controller) to support the corresponding timing control logic. If the original design's host controller or FPGA SRAM controller is not configured for, or cannot support, ZBT mode, a direct substitution will result in non-operation. Substitution is only viable if the system hardware and firmware layers are already compatible with, or can be reconfigured for, the ZBT timing protocol.
2. 71V65703S75BQG Substitution Conclusion
This part number is identical to the aforementioned 71V65703S75BQ in all key technical parameters, package, and ZBT protocol characteristics. The suffix "G" typically denotes only a difference in more environmentally friendly packaging materials or tape-and-reel packaging, which does not affect the chip's electrical or functional performance. Its substitution feasibility conclusion is therefore identical to that of the 71V65703S75BQ: it is a direct replacement in terms of physical package and basic parameters, but it is equally subject to the timing compatibility issue between the ZBT protocol and the original standard SDR protocol. The prerequisite for substitution remains that the host controller must be capable of supporting ZBT operation mode; otherwise, it cannot be used directly.
Analysis ID: 2162-2EB7000
Based on part parameters and for reference only. Not to be used for procurement or production.
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