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STMicroelectronics STM32F334R8T7 — Microcontrollers & Processors (MCU / MPU / DSP)

STM32F334R8T7 STM32F3 ARM Cortex-M4 MCU, 72MHz, 64KB Flash

MPNSTM32F334R8T7
Active

ST STM32F3 series, STM32F334R8T7, ARM Cortex-M4 32-Bit Single-Core MCU, 72MHz, 64KB Flash, 12K x 8 RAM, 64-LQFP, -40°C to 105°C.

$7.4000Ref. price · indicative, final on quote
STMicroelectronics STM32F334R8T7 datasheet (PDF)
Packaging64-LQFP
RoHSROHS3 Compliant
SeriesSTM32F3
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

STM32F334R8T7 specifications
ParameterValue
SeriesSTM32F3
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))2V ~ 3.6V
Operating temperature-40°C ~ 105°C (TA)
Speed72MHz
PackageTray
RAM size12K x 8
Core size32-Bit Single-Core
PeripheralsDMA, POR, PWM, WDT
ConnectivityCANbus, I²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)51
Core processorARM® Cortex®-M4
Case64-LQFP
Data convertersA/D 21x12b; D/A 3x12b
Program memory size64KB (64K x 8)

Product details

It carries 64 KB of Flash and 12K x 8 of SRAM — enough for a single motor-control FOC stack or a digital power converter with a few communication stacks, but tight for a GUI or a large data-logging buffer. The 21-channel 12-bit ADC and 3-channel 12-bit DAC give it a dense analog front-end for current sensing, voltage feedback, and analog setpoint generation without external converters. This part is aimed at industrial control, motor drives, power conversion, and sensor fusion applications where the combination of a DSP-capable FPU, fast 12-bit ADC, and CANbus connectivity matters more than raw memory density.

64 KB Flash — sizing the firmware budget

With 64 KB of Flash, the firmware engineer needs to budget carefully. A full sensorless FOC library plus CANopen stack can fit, but there is little room for a bootloader with dual-bank OTA.

The 64-LQFP package (10x10 mm body) is a hand-solderable, inspectable footprint with 51 usable GPIOs, which is generous for a 64-pin package.

The STM32F334 family shares a common die and pinout across density options, so if a future firmware growth requires more Flash, the STM32F334R8T6 (128 KB) or STM32F334C8T7 (64 KB, 48-pin) are drop-in software-compatible alternatives — same peripheral set, same register map, same toolchain.

Frequently asked questions

Is STM32F334R8T7 a direct replacement for STM32F334R8T6?

Yes. The STM32F334R8T7 and STM32F334R8T6 share the same die, 64 KB Flash, 64-LQFP package, and pinout. The T7 can replace a T6 in any design; the reverse is only safe if the ambient stays below 85°C.

Does STM32F334R8T7 support CANbus?

Yes. The CAN controller is the standard bxCAN peripheral with two mailboxes, compatible with CAN 2.0 A/B.

What is the maximum ADC resolution of STM32F334R8T7?

The ADC is 12-bit resolution with 21 multiplexed channels. There is no 16-bit or higher-resolution ADC on this MCU — for higher precision, an external SAR or sigma-delta ADC would be needed.

How does STM32F334R8T7 compare to STM32L151CBU6A?

The STM32L151 runs a Cortex-M3 at 32 MHz with a lower 1.8 V supply and tops out at 85°C, making it a low-power choice for battery devices. The STM32F334 runs a Cortex-M4 with FPU at 72 MHz, has 51 I/O vs 37, supports 105°C, and includes a 12-bit DAC. The F334 is the right pick for a real-time control loop with analog output; the L151 is better for a sensor node that sleeps most of the time.