| PartNumber | AT27BV040-12JI | AT27BV040-12JU | AT27BV020-90TI |
| Description | EPROM 4Mb (512Kx8) OTP 2.7-3.6V 120ns | EPROM 4Mb (512Kx8) OTP 2.7-3.6V 120ns | EPROM 2Mb(256Kx8) OTP 2.7-3.6V 90ns |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | EPROM | EPROM | EPROM |
| RoHS | E | Y | N |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | PLCC-32 | PLCC-32 | TSOP-32 |
| Type | OTP | OTP | OTP |
| Memory Size | 4 Mbit | 4 Mbit | 2 Mbit |
| Organization | 512 k x 8 | 512 k x 8 | 256 k x 8 |
| Interface Type | Parallel | Parallel | Parallel |
| Operating Supply Current | 30 mA | 30 mA | 25 mA |
| Programming Voltage | 13 V | 13 V | 13 V |
| Supply Voltage Max | 3.6 V, 5.5 V | 3.6 V, 5.5 V | 3.6 V, 5.5 V |
| Supply Voltage Min | 2.7 V, 4.5 V | 2.7 V, 4.5 V | 2.7 V, 4.5 V |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 85 C | + 85 C | + 85 C |
| Access Time | 120 ns | 120 ns | 90 ns |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | Microchip Technology / Atmel |
| Operating Supply Voltage | 3.3 V, 5 V | 3.3 V, 5 V | 3.3 V, 5 V |
| Output Enable Access Time | 50 ns | 50 ns | 50 ns |
| Product Type | EPROM | EPROM | EPROM |
| Factory Pack Quantity | 32 | 32 | 156 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |