| Part Number | AT27LV512A-90RC | AT27LV512A-90TC | 
|---|---|---|
| Manufacturer | Microchip Technology | Microchip Technology | 
| Category | Memory | Memory | 
|   |   | |
| Product Status | Obsolete | Obsolete | 
| Memory Type | Non-Volatile | Non-Volatile | 
| Memory Format | EPROM | EPROM | 
| Technology | EPROM - OTP | EPROM - OTP | 
| Memory Size | 512Kb (64K x 8) | 512Kb (64K x 8) | 
| Memory Interface | Parallel | Parallel | 
| Clock Frequency | - | - | 
| Write Cycle Time - Word, Page | - | - | 
| Access Time | 90 ns | 90 ns | 
| Voltage - Supply | 3V ~ 3.6V, 4.5V ~ 5.5V | 3V ~ 3.6V, 4.5V ~ 5.5V | 
| Operating Temperature | 0°C ~ 70°C (TC) | 0°C ~ 70°C (TC) | 
| Mounting Type | Surface Mount | Surface Mount | 
| Package / Case | 28-SOIC (0.342", 8.69mm Width) | 28-TSSOP (0.465", 11.80mm Width) | 
| Supplier Device Package | 28-SOIC | 28-TSOP |