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Microcontrollers
11 components in this category · Sourced from authorized channels · 24-hour quotes
Microcontrollers are the brains of embedded systems. Our MCU inventory spans the two most popular architectures in the maker and industrial world: 8-bit AVR (ATmega328P, the heart of Arduino Uno) and 32-bit ARM Cortex-M (STM32F103C8T6 and CBT6, the "Blue Pill" family). Both are available in through-hole and surface-mount packages, with full datasheets, programming guides and cross-reference tables. We also stock the USB-UART bridge chips (CH340G, CP2102) that make these MCUs talk to your computer. Every MCU lot is electrically verified — Flash size register, device ID, and peripheral self-test — to catch the remarked and clone dies that flood the broker market.
Available Parts
STM32F103C8T6
STMicroelectronics
LQFP-48
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ATMEGA328P-PU
Microchip Technology
DIP-28
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STM32F103CBT6
STMicroelectronics
LQFP-48
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ATtiny85-20PU
Microchip Technology
DIP-8
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ATMEGA2560-16AU
Microchip Technology
TQFP-100
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ATMEGA32U4-AU
Microchip Technology
TQFP-44
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PIC16F877A-I/P
Microchip Technology
DIP-40
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RP2040
Raspberry Pi
QFN-56
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STM32F103RCT6
STMicroelectronics
LQFP-64
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STM32F407VGT6
STMicroelectronics
LQFP-100
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STM32H743VIT6
STMicroelectronics
LQFP-100
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Microcontrollers – Frequently Asked Questions
Is the STM32F103C8T6 you sell genuine ST or a Chinese clone?
Genuine ST, sourced from STMicroelectronics authorized distribution. Every tray is verified by reading the Flash size register at 0x1FFFF7E0 (genuine C8T6 reads 0x0040) and the DBGMCU_IDCODE register (genuine ST reads 0x20036410). We reject CKS32F103, APM32F103 and GD32F103 clones, and we provide C-of-C with lot traceability on every shipment.
Can I upgrade from STM32F103C8T6 to CBT6 without changing my PCB?
Yes — C8T6 (64 KB Flash) and CBT6 (128 KB Flash) share the identical LQFP-48 pinout, peripheral set and electrical characteristics. Swap the chip, update your linker script to 128 KB, and reflash. No layout change needed.
Do you sell pre-programmed ATmega328P with the Arduino bootloader?
Yes, we stock both blank ATmega328P-PU (DIP-28) and units pre-flashed with the optiboot bootloader for Arduino Uno compatibility. Specify "with bootloader" on your RFQ if you need the pre-programmed variant.
What programming tools do I need?
For STM32: an ST-Link V2/V3, J-Link, or any CMSIS-DAP probe. The built-in ROM bootloader also supports UART, USB DFU, I²C, SPI and CAN programming. For ATmega328P: any AVR ISP programmer (USBasp, AVRISP mkII, Arduino-as-ISP). We stock all of these as accessories.
Related Reading
- STM32F103C8T6 vs CBT6: Flash Size, Pinout and Use Cases
A complete engineering and procurement comparison of ST's two most popular Blue Pill MCUs — identical LQFP-48 pinout, identical peripherals, one doubled Flash size. Includes migration checklist, counterfeit detection for both variants, and when to skip F103 entirely.
Need Microcontrollers components for your next build?
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