B-Series AT32UC3 AVR 32-Bit MCUs

Microchip Technology B-Series AT32UC3 AVR 32-Bit MCUs are designed for high data throughput and outstanding computing performance in space-constrained applications. It is especially well-suited for applications like USB Human Interface devices, USB stick gateway, biometrics, bridging, industrial control, and low-power portable applications. The series features high connectivity with a USB device and host. This feature, combined with a fast flash and large internal SRAM, makes it a perfect fit for data-intensive applications.

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Qty. RoHS ECAD Model Series
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Program Memory Size
Data RAM Size
Data Bus Width
ADC Resolution
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Supply Voltage - Min
Supply Voltage - Max
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Microchip Technology 32-bit Microcontrollers - MCU 32-bit 256KB Flash
Datasheet
358In Stock
Min.: 1
Mult.: 1

AT32UC3B1 SMD/SMT QFN-48 AVR 256 kB 32 kB 32 bit 10 bit 60 MHz 28 I/O 1.65 V 1.95 V - 40 C + 85 C Tray
Microchip Technology 32-bit Microcontrollers - MCU 32-bit 64KB Flash
Datasheet
227In Stock
Min.: 1
Mult.: 1

AT32UC3B1 SMD/SMT TQFP-48 AVR 64 kB 16 kB 32 bit 10 bit 60 MHz 28 I/O 1.65 V 1.95 V - 40 C + 85 C Tray
Microchip Technology 32-bit Microcontrollers - MCU 32-bit 128KB Flash
Datasheet
153In Stock
Min.: 1
Mult.: 1

AT32UC3B1 SMD/SMT QFN-48 AVR 128 kB 32 kB 32 bit 10 bit 60 MHz 28 I/O 1.65 V 1.95 V - 40 C + 85 C Tray
Microchip Technology 32-bit Microcontrollers - MCU 32-bit 256KB Flash
Datasheet
2,597In Stock
Min.: 1
Mult.: 1

AT32UC3B0 SMD/SMT TQFP-64 AVR 64 kB 32 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Tray
Microchip Technology 32-bit Microcontrollers - MCU 512KB Flash
Datasheet
695In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

AT32UC3B0 SMD/SMT TQFP-64 AVR 512 kB 96 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Reel, Cut Tape, MouseReel
Microchip Technology 32-bit Microcontrollers - MCU 512KB Flash
Datasheet
1,078In Stock
Min.: 1
Mult.: 1

AT32UC3B0 SMD/SMT TQFP-64 AVR 512 kB 96 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Tray

Microchip Technology 32-bit Microcontrollers - MCU 512KB Flash
Datasheet
294In Stock
Min.: 1
Mult.: 1

AT32UC3B0 SMD/SMT QFN-64 AVR 512 kB 96 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Tray
Microchip Technology 32-bit Microcontrollers - MCU 512KB Flash
Datasheet
374In Stock
Min.: 1
Mult.: 1

AT32UC3B1 SMD/SMT QFN-48 AVR 512 kB 96 kB 32 bit 10 bit 60 MHz 28 I/O 1.65 V 1.95 V - 40 C + 85 C Tray
Microchip Technology 32-bit Microcontrollers - MCU 256KB, 64QFP 85deg. Green
Datasheet
335In Stock
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

AT32UC3B0 SMD/SMT TQFP-64 AVR 256 kB 32 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Reel, Cut Tape, MouseReel
Microchip Technology 32-bit Microcontrollers - MCU 32-bit 128KB Flash
Datasheet
210In Stock
Min.: 1
Mult.: 1

AT32UC3B1 SMD/SMT TQFP-48 AVR 128 kB 32 kB 32 bit 10 bit 60 MHz 28 I/O 1.65 V 1.95 V - 40 C + 85 C Tray
Microchip Technology 32-bit Microcontrollers - MCU 32-bit
Datasheet
633In Stock
750Expected 2026/07/17
Min.: 1
Mult.: 1

AT32UC3B1 SMD/SMT TQFP-48 AVR 256 kB 32 kB 32 bit 10 bit 60 MHz 28 I/O 1.65 V 1.95 V - 40 C + 85 C Tray
Microchip Technology 32-bit Microcontrollers - MCU 32-bit 128KB Flash
Datasheet
65In Stock
Min.: 1
Mult.: 1

AT32UC3B0 SMD/SMT TQFP-64 AVR 128 kB 32 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Tray

Microchip Technology 32-bit Microcontrollers - MCU 32-bit 256KB Flash
Datasheet
38In Stock
520Expected 2026/10/08
Min.: 1
Mult.: 1

AT32UC3B0 SMD/SMT QFN-64 AVR 256 kB 32 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Tray

Microchip Technology 32-bit Microcontrollers - MCU 32-bit 64KB Flash
Datasheet
1,820On Order
Min.: 1
Mult.: 1

AT32UC3B0 SMD/SMT QFN-64 AVR 64 kB 16 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Tray

Microchip Technology 32-bit Microcontrollers - MCU 32-bit 128KB Flash
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 260
Mult.: 260

AT32UC3B0 SMD/SMT QFN-64 AVR 128 kB 32 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Tray

Microchip Technology 32-bit Microcontrollers - MCU 512KB Flash
Datasheet
Non-Stocked Lead-Time 4 Weeks
Min.: 4,000
Mult.: 4,000
: 4,000

AT32UC3B0 SMD/SMT QFN-64 AVR 512 kB 96 kB 32 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Reel
Microchip Technology 32-bit Microcontrollers - MCU 512KB Flash
Datasheet
Non-Stocked Lead-Time 8 Weeks
Min.: 4,000
Mult.: 4,000
: 4,000

AT32UC3B1 SMD/SMT QFN-48 AVR 512 kB 96 kB 32 bit 10 bit 60 MHz 28 I/O 1.65 V 1.95 V - 40 C + 85 C Reel
Microchip Technology 32-bit Microcontrollers - MCU 128KB, 64QFN 85deg. Green
Datasheet
Non-Stocked Lead-Time 19 Weeks
Min.: 1,500
Mult.: 1,500
: 1,500

AT32UC3B0 SMD/SMT TQFP-64 AVR 128 kB 32 kB 32 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Reel

Microchip Technology 32-bit Microcontrollers - MCU 128KB, 64QFN 85deg. Green
Datasheet
Non-Stocked Lead-Time 20 Weeks
Min.: 4,000
Mult.: 4,000
: 4,000

AT32UC3B0 SMD/SMT QFN-64 AVR 128 kB 32 kB 32 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Reel

Microchip Technology 32-bit Microcontrollers - MCU 256KB, 64QFN 85deg. Green
Datasheet
Non-Stocked Lead-Time 20 Weeks
Min.: 4,000
Mult.: 4,000
: 4,000

AT32UC3B0 SMD/SMT QFN-64 AVR 256 kB 32 kB 32 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Reel
Microchip Technology 32-bit Microcontrollers - MCU 64KB, 64QFP 85deg. Green
Datasheet
Non-Stocked Lead-Time 19 Weeks
MouseReel Available
Min.: 1
Mult.: 1
: 1,500

AT32UC3B0 SMD/SMT TQFP-64 AVR 64 kB 16 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Reel, Cut Tape, MouseReel
Microchip Technology 32-bit Microcontrollers - MCU 32-bit 64KB Flash
Datasheet
Lead-Time 19 Weeks
Min.: 1
Mult.: 1

AT32UC3B0 SMD/SMT TQFP-64 AVR 64 kB 16 kB 32 bit 10 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Tray

Microchip Technology 32-bit Microcontrollers - MCU 64KB, 64QFN 85deg. Green
Datasheet
Non-Stocked Lead-Time 20 Weeks
Min.: 4,000
Mult.: 4,000
: 4,000

AT32UC3B0 SMD/SMT QFN-64 AVR 64 kB 16 kB 32 bit 60 MHz 44 I/O 1.65 V 1.95 V - 40 C + 85 C Reel
Microchip Technology 32-bit Microcontrollers - MCU 128KB, 48QFN 85deg. Green
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 2,500
Mult.: 2,500
: 2,500

AT32UC3B1 SMD/SMT TQFP-48 AVR 128 kB 32 kB 32 bit 10 bit 60 MHz 28 I/O 1.65 V 1.95 V - 40 C + 85 C Reel
Microchip Technology 32-bit Microcontrollers - MCU 128KB, 48QFN 85deg. Green
Datasheet
Non-Stocked Lead-Time 18 Weeks
Min.: 4,000
Mult.: 4,000
: 4,000

AT32UC3B1 SMD/SMT QFN-48 AVR 128 kB 32 kB 32 bit 10 bit 60 MHz 28 I/O 1.65 V 1.95 V - 40 C + 85 C Reel