Original Part
SRAM - Synchronous, SDR (ZBT) Memory IC 9Mbit Parallel 133 MHz 4.2 ns 165-CABGA (13x15)
Alternative Part
SRAM - Synchronous, SDR (ZBT) Memory IC 9Mbit Parallel 150 MHz 3.8 ns 165-CABGA (13x15)
SRAM - Synchronous, SDR (ZBT) Memory IC 9Mbit Parallel 150 MHz 3.8 ns 165-CABGA (13x15)
1. Substitution Conclusion for 71V65603S150BQG
From a technical parameter perspective, the 71V65603S150BQG serves as a perfect drop-in replacement for the original 71V65603S133BQG. Both devices are identical in their core specifications: memory density, organization, interface, voltage, and package. The primary difference is a performance upgrade: the clock frequency is increased from 133MHz to 150MHz, and the access time is reduced from 4.2ns to 3.8ns. The new device offers superior bus throughput and response speed compared to the original part. From the system controller's standpoint, this constitutes a "derated" usage scenario, providing greater timing margin and posing no compatibility issues. Given the identical power supply, pinout, and physical package, this upgraded model can be directly substituted in the existing PCB footprint.
2. Substitution Conclusion for 71V65603S150BQGI
The 71V65603S150BQGI is also a valid replacement for the original 71V65603S133BQG, with the added benefit of a broader reliability envelope. Its technical parameters, including the upgraded frequency and speed, are completely identical to those of the 71V65603S150BQG. The sole distinction is the suffix "I," which typically denotes support for an extended industrial temperature range (e.g., -40°C to +85°C, compared to the commercial 0°C to +70°C range common for the original and standard BQG versions). This model not only provides the performance enhancement but also ensures stable operation under more demanding environmental conditions, representing an "upward compatibility" for the original design. With full electrical, pinout, and package compatibility, its substitution is both feasible and advantageous.
Analysis ID: 3EC1-269E000
Based on part parameters and for reference only. Not to be used for procurement or production.
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