Microchip Technology AT90USB646-AUR

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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® 90USB
Packaging Cut Tape (CT) | Tape & Reel (TR)
Core Processor AVR
Core Size 8-Bit
Speed 16MHz
Connectivity EBI/EMI, I2C, SPI, UART/USART, USB
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 48
Program Memory Size 64KB (64K x 8)
Program Memory Type FLASH
EEPROM Size 2K x 8
RAM Size 4K x 8
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V
Data Converters A/D 8x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 64-TQFP (14x14)
Package / Case 64-TQFP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The AT90USB646-AUR from Microchip is an 8-bit AVR microcontroller with integrated full-speed USB 2.0. It runs at 16 MHz with 64 KB flash and 4 KB SRAM. The device operates from 2.7V to 5.5V, offering design flexibility. Its 64-TQFP package provides a balanced I/O count for various embedded applications, especially those requiring USB connectivity.

  • Integrated USB 2.0: Eliminates external USB controller, reducing BOM cost and board space.
  • Wide Operating Voltage: Supports 2.7V-5.5V, simplifying power supply design and interfacing with legacy logic.
  • Efficient AVR Core: 16 MHz performance with low power consumption, ideal for battery-powered devices.
  • Ample Flash Memory: 64KB program space supports complex firmware and USB stacks.

USB HID Devices

Built-in USB controller simplifies the design of keyboards, mice, and custom HID peripherals without external USB chips.

Data Acquisition Systems

With 64KB flash and 4KB RAM, it can buffer and stream sensor data to a host computer via USB.

Industrial Control Panels

Its 5V operation and PWM outputs drive relays and indicators directly, reducing interface circuitry.

Consumer Electronics

Ideal for game controllers and joysticks, leveraging the USB interface and low-latency AVR core.

Firmware Update Tools

The USB bootloader support allows in-field firmware upgrades, simplifying maintenance.

Embedded Hubs

Can act as a bridge between legacy serial devices and modern USB hosts, using its UART and USB peripherals.

Q: What is the core architecture of the AT90USB646-AUR?
A: It uses an 8-bit AVR core running at up to 16 MHz, optimized for low-power and efficient code execution.
Q: What is the supply voltage range?
A: The device operates from 2.7V to 5.5V, making it compatible with both 3.3V and 5V systems.
Q: Does it have USB support?
A: Yes, the AT90USB646 includes a full-speed USB 2.0 controller, enabling direct PC connectivity.
Q: What package is this variant?
A: It comes in a 64-TQFP package, suitable for moderate-density PCB designs.
Base Product Number : AT90USB646
16MHz 64KB Flash 8-bit MCU AT90USB646-AUR AVR Data Acquisition HID Microchip TQFP-64 USB 2.0
Q: What is the core architecture of the AT90USB646-AUR?
A: It uses an 8-bit AVR core running at up to 16 MHz, optimized for low-power and efficient code execution.
Q: What is the supply voltage range?
A: The device operates from 2.7V to 5.5V, making it compatible with both 3.3V and 5V systems.
Q: Does it have USB support?
A: Yes, the AT90USB646 includes a full-speed USB 2.0 controller, enabling direct PC connectivity.
Q: What package is this variant?
A: It comes in a 64-TQFP package, suitable for moderate-density PCB designs.