| Part Number | IS61DDB21M36-250M3L | IS61DDB21M36A-250M3L | 
|---|---|---|
| Manufacturer | ISSI, Integrated Silicon Solution Inc | ISSI, Integrated Silicon Solution Inc | 
| Category | Memory | Memory | 
|   |   | |
| Product Status | Discontinued at Digi-Key | Discontinued at Digi-Key | 
| Memory Type | Volatile | Volatile | 
| Memory Format | SRAM | SRAM | 
| Technology | SRAM - Synchronous, DDR II | SRAM - Synchronous, DDR II | 
| Memory Size | 36Mb (1M x 36) | 36Mb (1M x 36) | 
| Memory Interface | Parallel | Parallel | 
| Clock Frequency | 250 MHz | 250 MHz | 
| Write Cycle Time - Word, Page | - | - | 
| Access Time | - | 8.4 ns | 
| Voltage - Supply | 1.71V ~ 1.89V | 1.71V ~ 1.89V | 
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 165-LBGA | 165-LBGA | 
| Supplier Device Package | 165-LFBGA (13x15) | 165-LFBGA (13x15) |