| Part Number | W979H2KBVX2E | W979H2KBVX1E | 
|---|---|---|
| Manufacturer | Winbond Electronics | Winbond Electronics | 
| Category | Memory | Memory | 
|   |   | |
| Product Status | Not For New Designs | Not For New Designs | 
| Memory Type | Volatile | Volatile | 
| Memory Format | DRAM | DRAM | 
| Technology | SDRAM - Mobile LPDDR2 | SDRAM - Mobile LPDDR2-S4B | 
| Memory Size | 512Mb (16M x 32) | 512Mb (16M x 32) | 
| Memory Interface | Parallel | HSUL_12 | 
| Clock Frequency | 400 MHz | 533 MHz | 
| Write Cycle Time - Word, Page | 15ns | 15ns | 
| Access Time | - | - | 
| Voltage - Supply | 1.14V ~ 1.95V | 1.14V ~ 1.3V, 1.7V ~ 1.95V | 
| Operating Temperature | -25°C ~ 85°C (TC) | -25°C ~ 85°C (TC) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 134-VFBGA | 134-VFBGA | 
| Supplier Device Package | 134-VFBGA (10x11.5) | 134-VFBGA (10x11.5) |