| Part Number | AT28BV64B-20SC | AT28BV64B-25SC | 
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | 
| Category | Memory | Memory | 
|   |   | |
| Product Status | Obsolete | Obsolete | 
| Memory Type | Non-Volatile | Non-Volatile | 
| Memory Format | EEPROM | EEPROM | 
| Technology | EEPROM | EEPROM | 
| Memory Size | 64Kb (8K x 8) | 64Kb (8K x 8) | 
| Memory Interface | Parallel | Parallel | 
| Clock Frequency | - | - | 
| Write Cycle Time - Word, Page | 10ms | 10ms | 
| Access Time | 200 ns | 250 ns | 
| Voltage - Supply | 2.7V ~ 3.6V | 2.7V ~ 3.6V | 
| Operating Temperature | 0°C ~ 70°C (TC) | 0°C ~ 70°C (TC) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 28-SOIC (0.295", 7.50mm Width) | 28-SOIC (0.295", 7.50mm Width) | 
| Supplier Device Package | 28-SOIC | 28-SOIC |