| PartNumber | M27C256B-90B6 | M27C256B-90B1 | M27C256B-90C1 |
| Description | EPROM 256K (32KX8) 90ns OTP programmable | EPROM 256K (32KX8) 90ns | EPROM 256K (32KX8) 90ns |
| Manufacturer | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Product Category | EPROM | EPROM | EPROM |
| RoHS | Y | Y | N |
| Mounting Style | Through Hole | Through Hole | SMD/SMT |
| Package / Case | PDIP-28 | PDIP-28 | PLCC-32 |
| Type | OTP, UV | OTP, UV | OTP, UV |
| Memory Size | 256 kB | 256 kB | 256 kB |
| Organization | 32 k x 8 | 32 k x 8 | 32 k x 8 |
| Interface Type | Parallel | Parallel | Parallel |
| Operating Supply Current | 50 mA | 50 mA | 50 mA |
| Programming Voltage | 12.75 V | 12.75 V | 12.75 V |
| Supply Voltage Min | 4.5 V | 4.5 V | 4.5 V |
| Minimum Operating Temperature | 0 C | - 40 C | - 40 C |
| Maximum Operating Temperature | + 85 C | + 70 C | + 70 C |
| Series | M27C256B | M27C256B | M27C256B |
| Packaging | Tube | Tube | Tube |
| Access Time | 90 ns | 90 ns | 90 ns |
| Brand | STMicroelectronics | STMicroelectronics | STMicroelectronics |
| Operating Supply Voltage | 5 V | 5 V | 5 V |
| Output Enable Access Time | 40 ns | 40 ns | 40 ns |
| Product Type | EPROM | EPROM | EPROM |
| Factory Pack Quantity | 13 | 13 | 32 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Unit Weight | 0.147798 oz | 0.147798 oz | - |