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| Part Number | AT27C040-90TU | 
| Datasheet | AT27C040-90TU datasheet | 
| Description | IC EPROM 4M PARALLEL 32TSOP | 
| Manufacturer | Microchip Technology | 
| Series | - | 
| Part Status | Obsolete | 
| Memory Type | Non-Volatile | 
| Memory Format | EPROM | 
| Technology | EPROM - OTP | 
| Memory Size | 4Mb (512K x 8) | 
| Clock Frequency | - | 
| Write Cycle Time - Word, Page | - | 
| Access Time | 90ns | 
| Memory Interface | Parallel | 
| Voltage - Supply | 4.5V ~ 5.5V | 
| Operating Temperature | -40°C ~ 85°C (TC) | 
| Mounting Type | Surface Mount | 
| Package / Case | 32-TFSOP (0.724", 18.40mm Width) | 
| Supplier Device Package | 32-TSOP |