Hardware AtlasSupplier reference Explore in 3D

AVIATION / Flight electronics / REVIEWED 2026-09-11

D03Microcontroller

Run the flight-control firmware and peripheral timing.

Manufacturers & products

The MCU is the upstream processor inside a flight controller. Buying the same CPU family does not reproduce its PCB, power supplies, sensor wiring, bootloader or flight software.

American sourcing options appear first. A U.S. company or distributor label does not establish U.S. manufacturing. The origin notes identify the specific evidence and any limits.

integrator

SparkFun Electronics / PJRC

Teensy 4.1

Microcontroller development board integrating an NXP Cortex-M7 processor; useful for custom embedded prototyping. [3][1][2]

U.S. manufacturing claim

PJRC specifically states Teensy 4.1 manufacture transferred to SparkFun in Colorado in 2025. This does not establish US origin of the NXP processor or other chips. [3][1][2]

Program / application

US-made development board; not a complete FC or default Betaflight target [3][1][2]

Published manufacturing site: Colorado, USA

Online catalog / ordering

Official product page provides a catalog or inquiry route; verify current stock, revision, firmware and connectors before ordering.

View catalog & ordering

manufacturer

Microchip Technology

SAM E70 / SAME70N21

Cortex-M7 microcontroller family for custom embedded designs with memory and peripheral interfaces. [4][5]

U.S. company

Microchip's corporate contact address is Chandler, Arizona. The reviewed product page does not establish where a particular MCU lot is fabricated, packaged or tested. [4][5]

Program / application

Upstream MCU alternative; custom board and firmware work required [4][5]

Company location: Chandler, Arizona, USA

Manufacturer inquiry

Official product page provides a catalog or inquiry route; verify current stock, revision, firmware and connectors before ordering.

View product & inquiry route

manufacturer

STMicroelectronics

STM32F722RE

Cortex-M7 MCU in the silicon family used by many F7 flight-controller designs. [6][7]

International supplier

ST identifies corporate headquarters in Geneva, Switzerland. Corporate nationality and individual chip manufacturing origin are different; no fab origin is inferred. [6][7]

Program / application

Upstream MCU IC; exact package and board firmware target matter [6][7]

Company location: Geneva, Switzerland

Manufacturer inquiry

Official product page provides a catalog or inquiry route; verify current stock, revision, firmware and connectors before ordering.

View product & inquiry route

What remains unverified

No lot-specific fabrication or assembly declarations were obtained.
The custom MCU alternatives do not have a verified ready-made firmware configuration for this illustrative drone.

Where it comes from

A company address is shown separately from a published factory location. Request the manufacturing site and lot traceability for the exact part when sourcing.

What to compare

Firmware target and architecture
Board support is more specific than Arm core compatibility.
Flash and RAM budget · KB or MB
Firmware features and logs compete for memory; external flash is a separate component.
Timers, DMA and peripherals
Motor outputs, sensor buses and serial ports can compete for fixed hardware resources.
Clock and execution timing · MHz
Compare real workload timing and interrupt behavior, not only advertised frequency.
Package and pinout
A different suffix may change pins, temperature grade or memory.
Supply and I/O voltage · V
Bare MCUs cannot be connected directly to a 6S battery.
Debug and recovery
Bootloader, SWD access and firmware tooling influence serviceability.
Manufacturing traceability
Board assembly, processor fabrication and package testing can span different countries.

Selection & integration notes

For a normal freestyle build, select the finished flight controller first.
Treat upstream alternatives as engineering options rather than solder-in substitutes.

Published product examples

2 REFERENCES

Specifications belong to the named product and configuration.

Teensy 4.1SparkFun Electronics / PJRC

Core clock: 600 MHz[1]Teensy 4.1 Cortex-M7 configuration documented by PJRC.
RAM: 1024 KB[1]Includes 512 KB tightly coupled memory in the published board specification.

Development platform rather than a complete sensor-equipped flight controller.

Example sources [3][1][2]

STM32F722RESTMicroelectronics

CPU clock: Up to 216 MHz[6]Manufacturer rated maximum for this Cortex-M7 MCU family.
Flash: 512 Kbytes[6]STM32F722RE product description; other suffixes can differ.

No claim of pin compatibility with an H7 or SAM-family part.

Example sources [6][7]

Sources & references

REVIEWED 2026-09-11

Manufacturer pages and technical documents support the linked claims. A review date is not a publication date or stock check.

Teensy 4.1 technical reference PJRC · Publication date not stated
Teensy 4.1 MCU-board specifications and transfer of current manufacture to SparkFun.
Accessed 2026-09-10
SparkFun to manufacture Teensy PJRC · Published 2025-03-13
Explicit Colorado manufacture for Teensy 4.0/4.1 following Oregon manufacture; not a claim about every SparkFun product.
Accessed 2026-09-10
Teensy 4.1 SparkFun Electronics · Publication date not stated
Current manufacturer retail route for Teensy 4.1.
Accessed 2026-09-10
SAME70N21 Microchip Technology · Publication date not stated
Cortex-M7 family product offering; not evidence of a ready-to-use FPV firmware target.
Accessed 2026-09-10
Contact us Microchip Technology · Publication date not stated
Corporate contact address in Chandler, Arizona; no SKU-specific fabrication origin.
Accessed 2026-09-10
STM32F722RE STMicroelectronics · Publication date not stated
MCU CPU and flash specifications.
Accessed 2026-09-10
Corporate media resource gallery STMicroelectronics · Publication date not stated
Company identifies headquarters in Geneva, Switzerland; this is not a chip manufacturing location.
Accessed 2026-09-10