Specifications
| Attribute | Value |
| Supplier | Microchip Technology |
| Package / Case | Tray |
| Series | AVR® |
| Part Status | Obsolete |
| Applications | Keyboard Controller |
| Core Processor | AVR |
| Program Memory Type | SRAM (16kB) |
| Controller Series | AT43USB |
| RAM Size | 512 x 8 |
| Interface | SPI, 3-Wire Serial |
| Number of I/O | 42 |
| Voltage - Supply | 4.4V ~ 5.25V |
| Operating Temperature | -40°C ~ 85°C |
| Mounting Type | Surface Mount |
