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STMicroelectronics STM32F103R4T6A — Microcontrollers & Processors (MCU / MPU / DSP)

ST STM32F103R4T6A ARM Cortex-M3 MCU, 72 MHz, 16 KB Flash

MPNSTM32F103R4T6A
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STMicroelectronics STM32F1 series, ARM Cortex-M3, 32-Bit Single-Core MCU, 72MHz, 16KB (16K x 8) FLASH, 6K x 8 RAM, CAN, I²C, IrDA, LIN, SPI, UART/USART, USB, 51 I/O, 64-LQFP, -40°C to 85°C.

$6.7800Ref. price · indicative, final on quote
STMicroelectronics STM32F103R4T6A datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32F103R4T6A specifications
ParameterValue
SeriesSTM32F1
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2V ~ 3.6V
Operating temperature-40°C~85°C(TA)
Speed72MHz
PackageTray
RAM size6K x 8
Core size32-Bit Single-Core
PeripheralsDMA, Motor Control PWM, PDR, POR, PVD, PWM, Temp Sensor, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, SPI, UART/USART, USB
Number of i (O)51
Core processorARM® Cortex®-M3
Case64-LQFP
Data convertersA/D 16x12b
Program memory size16KB (16K x 8)

Product details

The STM32F103R4T6A: Runs at 72 MHz with 16 KB of Flash and 6K x 8 of RAM — the entry-level density option in the STM32F103 line.

Peripherals and interfaces — CAN and USB on the same die

The CAN and USB combination is what sets it apart from the lower-end STM32F103 variants — you get both industrial fieldbus and host/device USB on a single 64-pin LQFP. That saves a board-level transceiver or a second MCU in many designs. The 51 I/O lines give enough headroom for a keypad, display, and a few sensors alongside the serial interfaces.

Package and footprint — 64-LQFP

Housed in a 64-LQFP, this is a surface-mount package.

Frequently asked questions

What is the RAM size of STM32F103R4T6A?

6K x 8 (6 KB) of SRAM — enough for small control loops and modest buffering, but tight for large packet buffers or extensive heap usage.

What is the closest pin-compatible replacement for STM32F103R4T6A?

Within the STM32F103 series, higher-density variants like the STM32F103R8T6 (64 KB Flash, 20 KB RAM) are pin-compatible in the same 64-LQFP package. They drop in without a board change, just a firmware update. No official second-source from another manufacturer is listed.