| PartNumber | IS61QDB21M36-250M3 | IS61QDB21M36A-250M3L | IS61QDB21M36-250M3L |
| Description | SRAM 36Mb 1Mbx36 QUAD Sync SRAM | SRAM 36Mb 1Mx36 250Mhz QUAD Sync SRAM | SRAM 36M (1Mx36) 250Mhz QUAD Sync SRAM |
| Manufacturer | ISSI | ISSI | ISSI |
| Product Category | SRAM | SRAM | SRAM |
| RoHS | N | Y | Y |
| Memory Size | 36 Mbit | 36 Mbit | 36 Mbit |
| Organization | 1 M x 36 | 1 M x 36 | 1 M x 36 |
| Access Time | 4 ns | - | 3.5 ns |
| Maximum Clock Frequency | 250 MHz | 250 MHz | 166 MHz |
| Interface Type | Parallel | Parallel | Parallel |
| Supply Voltage Max | 1.89 V | 1.9 V | 2.625 V |
| Supply Voltage Min | 1.71 V | 1.7 V | 2.375 V |
| Supply Current Max | 700 mA | 1200 mA | 400 mA |
| Minimum Operating Temperature | 0 C | 0 C | 0 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 70 C |
| Mounting Style | SMD/SMT | SMD/SMT | SMD/SMT |
| Package / Case | BGA-165 | FBGA-165 | TQFP-100 |
| Packaging | Tray | Tray | Reel |
| Data Rate | DDR | - | - |
| Series | IS61QDB21M36 | IS61QDB21M36A | IS61VPS102436A |
| Type | Synchronous | - | Synchronous |
| Brand | ISSI | ISSI | ISSI |
| Number of Ports | 2 | - | - |
| Moisture Sensitive | Yes | Yes | Yes |
| Product Type | SRAM | SRAM | SRAM |
| Factory Pack Quantity | 105 | 105 | 800 |
| Subcategory | Memory & Data Storage | Memory & Data Storage | Memory & Data Storage |
| Memory Type | - | Quad | SDR |
| Unit Weight | - | - | 0.023175 oz |