| PartNumber | SST39LF400A-55-4C-EKE | SST39LF400A-55-4C-B3KE | SST39LF400A-55-4C-B3KE-T |
| Description | NOR Flash 4M (256K x 16) 55ns | NOR Flash 4M (256K x 16) 55ns | NOR Flash 3.0 to 3.6V 4Mbit Multi-Purpose Flash |
| Manufacturer | Microchip | Microchip | Microchip |
| Product Category | NOR Flash | NOR Flash | NOR Flash |
| RoHS | Y | Y | Y |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | TSOP-48 | TFBGA-48 | TFBGA-48 |
| Series | SST39LF | SST39LF | SST39LF |
| Memory Size | 4 Mbit | 4 Mbit | 4 Mbit |
| Interface Type | Parallel | Parallel | Parallel |
| Organization | 256 k x 16 | 256 k x 16 | 256 k x 16 |
| Timing Type | Asynchronous | Asynchronous | Asynchronous |
| Data Bus Width | 16 bit | 16 bit | 16 bit |
| Supply Voltage Min | 3 V | 3 V | 3 V |
| Supply Voltage Max | 3.6 V | 3.6 V | 3.6 V |
| Supply Current Max | 30 mA | 30 mA | 30 mA |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Packaging | Tray | Tray | Reel |
| Height | 1.05 (Max) mm | 0.75 mm | - |
| Length | 12.2 (Max) mm | 8 mm | - |
| Memory Type | NOR | NOR | NOR |
| Speed | 55 ns | 55 ns | 55 ns |
| Type | No Boot Block | No Boot Block | - |
| Width | 18.5 (Max) mm | 6 mm | - |
| Architecture | Sectored | Sectored | Sector |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology |
| Moisture Sensitive | Yes | Yes | Yes |
| Product Type | NOR Flash | NOR Flash | NOR Flash |
| Programming Voltage | 3 V to 3.6 V | 3 V to 3.6 V | - |
| Standard | Common Flash Interface (CFI) | Common Flash Interface (CFI) | - |
| Factory Pack Quantity | 96 | 480 | 2500 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Unit Weight | 0.000705 oz | - | - |