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| PartNumber | IS61DDB41M36-250M3 | IS61DDB41M18A-250M3L | IS61DDB41M18A-400B4LI |
| Description | SRAM 36Mb 1Mbx36 DDR II Sync SRAM | SRAM 18Mb 250Mhz 1Mx18 DDR-II Sync SRAM | |
| Manufacturer | ISSI | ISSI | - |
| Product Category | SRAM | SRAM | - |
| RoHS | N | Y | - |
| Memory Size | 36 Mbit | 18 Mbit | - |
| Organization | 1 M x 36 | 1 M x 18 | - |
| Access Time | 4 ns | - | - |
| Maximum Clock Frequency | 250 MHz | 250 MHz | - |
| Interface Type | Parallel | Parallel | - |
| Supply Voltage Max | 1.9 V | 1.9 V | - |
| Supply Voltage Min | 1.7 V | 1.7 V | - |
| Supply Current Max | 550 mA | 600 mA | - |
| Minimum Operating Temperature | 0 C | 0 C | - |
| Maximum Operating Temperature | + 70 C | + 70 C | - |
| Mounting Style | SMD/SMT | SMD/SMT | - |
| Package / Case | BGA-165 | FBGA-165 | - |
| Packaging | Tray | Tray | - |
| Data Rate | DDR | - | - |
| Series | IS61DDB41M36 | IS61DDB41M18A | - |
| Type | Synchronous | - | - |
| Brand | ISSI | ISSI | - |
| Number of Ports | 1 | - | - |
| Moisture Sensitive | Yes | Yes | - |
| Product Type | SRAM | SRAM | - |
| Factory Pack Quantity | 105 | 105 | - |
| Subcategory | Memory & Data Storage | Memory & Data Storage | - |
| Memory Type | - | DDR-II | - |