| PartNumber | AT27C256R-70PI | AT27C256R-70PC | AT27C256R-70PA |
| Description | EPROM 256Kb (32Kx8) OTP 5V 70ns | EPROM 32Kx8 70ns | IC EPROM 256K PARALLEL 28DIP |
| Manufacturer | Microchip | Microchip | - |
| Product Category | EPROM | EPROM | - |
| RoHS | E | N | - |
| Mounting Style | Through Hole | Through Hole | - |
| Package / Case | PDIP-28 | PDIP-28 | - |
| Type | OTP | OTP | - |
| Memory Size | 256 kb | 256 kbit | - |
| Organization | 32 k x 8 | 32 k x 8 | - |
| Interface Type | Parallel | Parallel | - |
| Operating Supply Current | 20 mA | 20 mA | - |
| Programming Voltage | 13 V | 13 V | - |
| Supply Voltage Min | 4.5 V | 4.5 V | - |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 85 C | + 70 C | - |
| Series | AT27C256R | AT27C256R | - |
| Access Time | 45 ns | 70 ns | - |
| Brand | Microchip Technology / Atmel | Microchip Technology / Atmel | - |
| Operating Supply Voltage | 2.7 V to 3.6 V | 5 V | - |
| Output Enable Access Time | 30 ns | 30 ns | - |
| Product Type | EPROM | EPROM | - |
| Factory Pack Quantity | 12 | - | - |
| Subcategory | Memory & Data Storage | Memory & Data Storage | - |
| Unit Weight | 0.147798 oz | 0.147798 oz | - |