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| Part Number | SST39SF040-45-4I-WHE | SST39SF040-55-4I-WHE | SST39SF040-45-4C-WHE | SST39SF040-45-4I-NHE |
|---|---|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Product Status | Obsolete | Active | Obsolete | Obsolete |
| Memory Type | Non-Volatile | Non-Volatile | Non-Volatile | Non-Volatile |
| Memory Format | Flash | Flash | Flash | Flash |
| Technology | Flash | Flash | Flash | Flash |
| Memory Size | 4Mb (512K x 8) | 4Mb (512K x 8) | 4Mb (512K x 8) | 4Mb (512K x 8) |
| Memory Interface | Parallel | Parallel | Parallel | Parallel |
| Clock Frequency | - | - | - | - |
| Write Cycle Time - Word, Page | 20µs | 20µs | 20µs | 20µs |
| Access Time | 45 ns | 55 ns | 45 ns | 45 ns |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Package / Case | 32-TFSOP (0.488", 12.40mm Width) | 32-TFSOP (0.488", 12.40mm Width) | 32-TFSOP (0.488", 12.40mm Width) | 32-LCC (J-Lead) |
| Supplier Device Package | 32-TSOP | 32-TSOP | 32-TSOP | 32-PLCC (11.43x13.97) |
