| Part Number | W958D8NBYA5I | W958D8NBYA4I |
|---|---|---|
| Manufacturer | Winbond Electronics | Winbond Electronics |
| Category | Memory | Memory |
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| Product Status | Active | Active |
| Memory Type | Volatile | Volatile |
| Memory Format | PSRAM | PSRAM |
| Technology | PSRAM (Pseudo SRAM) | PSRAM (Pseudo SRAM) |
| Memory Size | 256Mb (32M x 8) | 256Mb (32M x 8) |
| Memory Interface | HyperBus | HyperBus |
| Clock Frequency | 200 MHz | 250 MHz |
| Write Cycle Time - Word, Page | 35ns | 35ns |
| Access Time | 35 ns | 28 ns |
| Voltage - Supply | 1.7V ~ 2V | 1.7V ~ 2V |
| Operating Temperature | -40°C ~ 85°C (TC) | -40°C ~ 85°C (TC) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 24-TBGA | 24-TBGA |
| Supplier Device Package | 24-TFBGA (6x8) | 24-TFBGA (6x8) |