AT90USB646 - Electronic component Microchip - Free user manual and instructions
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| Type of product | Microcontroller with USB interface |
| Brand | Microchip Technology |
| Model | AT90USB646 |
| Package | 48-pin TQFP (7x7 mm) or QFN (7x7 mm) |
| Dimensions | 7 mm x 7 mm (package) |
| Weight | Approx. 0.2 g |
| Supply voltage | 2.7V to 5.5V |
| Maximum clock frequency | 16 MHz |
| Flash memory | 64 KB |
| SRAM | 4 KB |
| EEPROM | 2 KB |
| USB interface | USB 2.0 Full-Speed (12 Mbps) |
| Digital I/O pins | 32 general-purpose I/O lines |
| Analog inputs | 8-channel, 10-bit ADC |
| Timers | 3 flexible timer/counters with compare modes |
| Serial communication | USART, SPI, TWI (I2C) |
| Main functions | Embedded control, USB data transfer, signal processing |
| Maintenance and cleaning | Keep dry; avoid static discharge; clean with isopropyl alcohol if needed |
| Safety precautions | ESD-sensitive; use grounded workstations; avoid exceeding supply voltage |
| Spare parts and repairability | Not user-serviceable; replacement available through Microchip distributors |
| General information | 8-bit AVR RISC microcontroller; integrated USB transceiver; suitable for USB-based embedded designs |
Frequently Asked Questions - AT90USB646 Microchip
What is the operating voltage range of the AT90USB646?
The AT90USB646 operates from 2.7V to 5.5V, making it compatible with both 3.3V and 5V systems.
How do I program the AT90USB646?
It can be programmed via ISP (In-System Programming) using SPI interface or through the USB bootloader (DFU) if pre-loaded. Tools like AVRISP mkII or USBtinyISP are commonly used.
What is the maximum clock speed?
The maximum clock frequency is 16 MHz, requiring an external crystal or oscillator.
Does it have a built-in USB controller?
Yes, it integrates a full-speed USB 2.0 controller (12 Mbps) with a flexible endpoint configuration.
How much flash memory is available?
It has 64 KB of flash memory for program storage.
What package options are available?
The AT90USB646 is offered in 48-pin TQFP and 48-pin QFN packages, both measuring 7x7 mm.
Can I use it with Arduino?
While not directly Arduino-compatible, you can use AVR core libraries. Some boards like the Teensy++ 2.0 use this chip.
What are the main communication interfaces?
It provides USART, SPI, and TWI (I2C) interfaces, plus a USB 2.0 full-speed device.
How do I handle ESD protection?
Use anti-static mats and wrist straps when handling. Store in anti-static bags. Avoid touching pins directly.
Where can I find the datasheet?
The complete datasheet is available for free on the Microchip website or through authorized distributors.
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USER MANUAL AT90USB646 Microchip
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Product information
Brand : Microchip
Model : AT90USB646
Category : Electronic component