| Part Number | AT27LV040A-90TC | AT27LV040A-90VC | 
|---|---|---|
| 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 | 4Mb (512K x 8) | 4Mb (512K 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 | 32-TFSOP (0.724", 18.40mm Width) | 32-TFSOP (0.488", 12.40mm Width) | 
| Supplier Device Package | 32-TSOP | 32-VSOP |