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STMicroelectronics STM32F105RCT6TR — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F105RCT6TR STM32F1 ARM Cortex-M3 MCU, 72 MHz

MPNSTM32F105RCT6TR
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STMicroelectronics STM32F1 series 32-bit ARM Cortex-M3 MCU, STM32F105RCT6TR, 72 MHz, 256 KB Flash, 64 KB RAM, USB OTG, CAN, 51 I/O, 64-LQFP, -40 to 85°C.

$9.4800Ref. price · indicative, final on quote
STMicroelectronics STM32F105RCT6TR datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM32F105RCT6TR 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
PackageTape & Reel (TR); Cut Tape (CT)
RAM size64K x 8
Core size32-Bit Single-Core
PeripheralsDMA, POR, PWM, Voltage Detect, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, SPI, UART/USART, USB OTG
Number of i (O)51
Core processorARM® Cortex®-M3
Case64-LQFP
Data convertersA/D 16x12b; D/A 2x12b
Program memory size256KB (256K x 8)

Product details

Connectivity hub in a 64-pin LQFP

The 64-LQFP (10x10 mm) package keeps the board area tight while still offering 51 GPIOs.

The Flash is large enough for a USB stack, a CANopen or J1939 protocol layer, and a modest application loop. The 64 KB SRAM (organised as 64K x 8) supports moderate data buffering — enough for a few CAN message queues or a USB bulk transfer buffer. If your application needs more RAM for frame buffers or large lookup tables, consider moving up to the STM32F107 series which doubles the SRAM.

The peripheral list includes DMA, POR, PWM, voltage detect, and a watchdog — enough to build a reliable system without external supervisory ICs.

There is no PCN or last-time-buy window to track. For a production BOM, this means no forced redesign horizon from this component.

Frequently asked questions

What is the closest pin-compatible alternative to STM32F105RCT6TR?

Within the STM32F105 line, the STM32F105R8T6 (64 KB Flash) and STM32F105VCT6 (256 KB Flash, 100-pin) share the same core and peripherals but differ in memory density or pin count. For a direct drop-in with more Flash, the STM32F105RDT6 (384 KB Flash) uses the same 64-LQFP footprint and pinout. Cross-check the specific package code and supply voltage range before substituting.

Can I use STM32F105RCT6TR as a replacement for STM32F103RCT6?

Yes, in many designs. The STM32F105RCT6TR is pin-compatible with the STM32F103RCT6 in the same 64-LQFP package. The key difference is USB OTG support on the F105 — the F103 lacks it. The F105 also adds CAN 2.0B. Check that your firmware handles the slightly different peripheral register map and that the USB OTG pins are not used for other functions in your layout.