| PartNumber | AT27C040-70JU-T | AT27C040-70JU | AT27C040-70JC |
| Description | EPROM 70NS PLCC IND GRN | EPROM 4Mb (512Kx8) OTP 5V 70ns | EPROM 512kx8 70ns |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | EPROM | EPROM | EPROM |
| RoHS | Y | Y | N |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | PLCC-32 | PLCC-32 | PLCC-32 |
| Type | OTP | OTP | OTP |
| Memory Size | 4 Mbit | 4 Mbit | 4 MB |
| Organization | 512 k x 8 | 512 k x 8 | 512 k x 8 |
| Interface Type | Parallel | Parallel | Parallel |
| Operating Supply Current | 30 mA | 100 uA | 30 mA |
| Programming Voltage | 13 V | 13 V | 13 V |
| Supply Voltage Max | 5.5 V | 5.5 V | - |
| Supply Voltage Min | 4.5 V | 4.5 V | 4.5 V |
| Minimum Operating Temperature | - 40 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Series | AT27C040 | AT27C040 | AT27C040 |
| Packaging | Reel | Tube | - |
| Access Time | 70 ns | 70 ns | 70 ns |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Moisture Sensitive | Yes | Yes | - |
| Operating Supply Voltage | 5 V | 5 V | 2.7 V to 3.6 V |
| Output Enable Access Time | 30 ns | 30 ns | 30 ns |
| Product Type | EPROM | EPROM | EPROM |
| Factory Pack Quantity | 750 | 32 | 32 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Unit Weight | - | 0.082118 oz | - |