| Part Number | AT27C040-90JU-T | AT27C020-90JU-T |
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology |
| Category | Memory | Memory |
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| Product Status | Active | Active |
| Memory Type | Non-Volatile | Non-Volatile |
| Memory Format | EPROM | EPROM |
| Technology | EPROM - OTP | EPROM - OTP |
| Memory Size | 4Mb (512K x 8) | 2Mb (256K x 8) |
| Memory Interface | Parallel | Parallel |
| Clock Frequency | - | - |
| Write Cycle Time - Word, Page | - | - |
| Access Time | 90 ns | 90 ns |
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TC) | -40°C ~ 85°C (TC) |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | 32-LCC (J-Lead) | 32-LCC (J-Lead) |
| Supplier Device Package | 32-PLCC (11.43x13.97) | 32-PLCC (13.97x11.43) |