| Series | AVR® |
| Package | Tray |
| Part Status | Obsolete |
| Applications | USB Microcontroller |
| Core Processor | AVR |
| Program Memory Type | SRAM (24kB) |
| Controller Series | AT43USB |
| RAM Size | 1K x 8 |
| Interface | SPI, 3-Wire Serial |
| Number of I/O | 27 |
| Voltage - Supply | 4.4V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
| Package / Case | 64-LQFP |
| Supplier Device Package | 64-LQFP (10x10) |
