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    | Type | Description | 
|---|---|
| rohs: | RoHS | 
| ram size: | 512 x 8 | 
| interface: | SPI Serial, USB, UART | 
| part status: | Obsolete | 
| applications: | USB Hub/Microcontroller | 
| mounting type: | Surface Mount | 
| number of i/o: | 32 | 
| core processor: | AVR | 
| package / case: | 100-LQFP | 
| voltage - supply: | 4.4V ~ 5.25V | 
| controller series: | AT43USB | 
| program memory type: | - | 
| operating temperature: | 0°C ~ 70°C | 
| supplier device package: | 100-LQFP (14x14) |