STMicroelectronics

STM32F334C8T6 - 32-bit ARM Cortex-M4 MCU with FPU | STMicroelectronics

Name: STM32F334C8T6
Brand: STMicroelectronics
Price: 6.50 USD
Availability: InStock

MPN: STM32F334C8T6 ✓ Active

In Stock (99,999) Ships in 1-3 business days

2.0 V to 3.6 V Vdss LQFP-48 (7x7 mm) Package 72 MHz Speed 64 KB Memory

$6.5 USD / Unit

MOQ: 1 |

Volume Pricing

Qty	Unit Price	Extended
1	$6.5	$6.50
10	$5.85	$58.50
100	$5.2	$520.00
500	$4.68	$2,340.00
1,000	$4.16	$4,160.00

ℹ️ All prices are in USD

View Datasheet (PDF) View Alternatives

Quantity

Drop-in alternatives for STM32F334C8T6 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.

Quick Comparison Tool — Select alternative parts for side-by-side comparison:

STM32F334C8T7

✅ Drop-In

📦 LQFP-48

Extended temperature range (-40C to +105C), same pinout

📋 Reference alternative (not in catalog)

STM32F334C6T6

✅ Drop-In

📦 LQFP-48

32 KB Flash instead of 64 KB, same pinout

📋 Reference alternative (not in catalog)

STM32F334C4T6

✅ Drop-In

📦 LQFP-48

16 KB Flash instead of 64 KB, same pinout

📋 Reference alternative (not in catalog)

STM32F303C8T6

✅ Drop-In

📦 LQFP-48

No HRTIM, different peripheral set, same pinout

📋 Reference alternative (not in catalog)

ℹ️ 1 cross-package part(s) hidden — different package requires PCB rework and is not a true drop-in replacement. Contact us if you need cross-package suggestions.

STM32F334C8T6 Maximum Ratings & Electrical Characteristics

Core	ARM Cortex-M4 with FPU
Maximum Clock Speed	72 MHz
Flash Memory	64 KB
SRAM	12 KB
Supply Voltage	2.0 V to 3.6 V
Operating Temperature	-40C to +85C
Package	LQFP-48 (7x7 mm)
Mounting Type	Surface Mount
Number of I/Os	37
ADC Resolution	12-bit
ADC Channels	21
DAC Resolution	12-bit
DAC Channels	1
Timers	Advanced 16-bit timers with dead-time generation
High-Resolution Timer	217 ps resolution
Communication Interfaces	5x USART, 2x SPI, 2x I2C, 1x USB 2.0 FS, 1x CAN
RoHS Status	Compliant

STM32F334C8T6 Pin Configuration

Pin 1	VBAT — Battery backup supply
Pin 2	PC13 — GPIO / RTC
Pin 3	PC14 — GPIO / OSC32_IN
Pin 4	PC15 — GPIO / OSC32_OUT
Pin 5	PF0 — GPIO / OSC_IN
Pin 6	PF1 — GPIO / OSC_OUT
Pin 7	NRST — Reset
Pin 8	VSSA — Analog ground
Pin 9	VDDA — Analog power supply
Pin 10	PA0 — GPIO / ADC_IN0
Pin 11	PA1 — GPIO / ADC_IN1
Pin 12	PA2 — GPIO / USART2_TX
Pin 13	PA3 — GPIO / USART2_RX
Pin 14	PA4 — GPIO / DAC_OUT1
Pin 15	PA5 — GPIO / DAC_OUT2
Pin 16	PA6 — GPIO / TIM1_CH1
Pin 17	PA7 — GPIO / TIM1_CH2
Pin 18	PB0 — GPIO / TIM1_CH3
Pin 19	PB1 — GPIO / TIM1_CH4
Pin 20	PB2 — GPIO / BOOT1
Pin 21	PB10 — GPIO / I2C2_SCL
Pin 22	PB11 — GPIO / I2C2_SDA
Pin 23	PB12 — GPIO / SPI2_NSS
Pin 24	PB13 — GPIO / SPI2_SCK
Pin 25	PB14 — GPIO / SPI2_MISO
Pin 26	PB15 — GPIO / SPI2_MOSI
Pin 27	PA8 — GPIO / MCO
Pin 28	PA9 — GPIO / USART1_TX
Pin 29	PA10 — GPIO / USART1_RX
Pin 30	PA11 — GPIO / USB_DM
Pin 31	PA12 — GPIO / USB_DP
Pin 32	PA13 — GPIO / SWDIO
Pin 33	PA14 — GPIO / SWCLK
Pin 34	PA15 — GPIO / JTDI
Pin 35	PB3 — GPIO / JTDO
Pin 36	PB4 — GPIO / NJTRST
Pin 37	PB5 — GPIO / I2C1_SMBA
Pin 38	PB6 — GPIO / I2C1_SCL
Pin 39	PB7 — GPIO / I2C1_SDA
Pin 40	BOOT0 — Boot mode selection
Pin 41	PB8 — GPIO / CAN_RX
Pin 42	PB9 — GPIO / CAN_TX
Pin 43	VDD — Digital power supply
Pin 44	VSS — Digital ground
Pin 45	PC14 — GPIO / OSC32_IN
Pin 46	PC15 — GPIO / OSC32_OUT
Pin 47	PC13 — GPIO / RTC
Pin 48	VBAT — Battery backup supply

Safe Operating Area (SOA) & Thermal Characteristics

No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.

Typical Applications

STM32F334C8T6 is suitable for 6 applications: Field-Oriented Control (FOC) of Brushless DC Motors, Digital Power Supplies (Buck, Boost, Flyback), Solar Inverters, LED Lighting, Industrial Automation, Test and Measurement Equipment.

🚗

Field-Oriented Control (FOC) of Brushless DC Motors

The STM32F334C8T6 is ideal for FOC of BLDC motors due to its high-resolution timer (HRTIM) with 217 ps resolution and fast 12-bit ADC. The HRTIM generates precise PWM signals for three-phase inverters, while the ADC samples phase currents with minimal latency. The FPU accelerates Clarke and Park transforms, enabling efficient real-time control. In a typical FOC application, the MCU reads current sensors via the ADC, computes the rotor position using Hall sensors or encoders, and updates PWM duty cycles at a rate of 20 kHz. The advanced timers provide dead-time insertion to prevent shoot-through in the inverter bridge. Compared to general-purpose MCUs, the STM32F334C8T6 reduces CPU load by offloading PWM generation to hardware, allowing more headroom for complex control algorithms. Designers should ensure proper grounding and shielding of analog inputs to maintain ADC accuracy.

Recommended

L6230PD (Three-phase motor driver) ACS712 (Current sensor)

⚡

Digital Power Supplies (Buck, Boost, Flyback)

The STM32F334C8T6 excels in digital power conversion due to its HRTIM, which provides high-resolution PWM for precise voltage regulation. The HRTIM's 217 ps resolution allows fine control of duty cycle, reducing output ripple. The fast ADC enables high-bandwidth voltage and current sensing for closed-loop control. In a typical buck converter application, the MCU reads the output voltage via a resistor divider, compares it to a reference, and adjusts the PWM duty cycle to maintain regulation. The HRTIM's fault inputs provide hardware protection against overcurrent and overvoltage. The FPU accelerates PID control loops, enabling high switching frequencies up to 1 MHz. Compared to analog controllers, the digital approach offers flexibility in tuning and monitoring. Designers should pay attention to the ADC sampling time and PWM update rate to ensure stability.

Recommended

IR2110 (Gate driver) TL431 (Voltage reference)

⚡

Solar Inverters

The STM32F334C8T6 is well-suited for solar inverters, where it manages maximum power point tracking (MPPT) and DC-AC conversion. The HRTIM generates high-frequency PWM for the inverter bridge, while the ADC monitors solar panel voltage and current. The FPU accelerates MPPT algorithms, such as perturb and observe, to maximize energy harvest. In a typical solar inverter, the MCU controls a boost converter to step up the panel voltage and an H-bridge to produce AC output. The HRTIM's dead-time generation ensures safe switching of the bridge. The device's wide operating temperature range (-40°C to +85°C) makes it suitable for outdoor installations. Compared to dedicated solar inverter ICs, the STM32F334C8T6 offers programmability for different topologies. Designers should implement robust protection features, such as overvoltage and overcurrent detection, using the HRTIM fault inputs.

Recommended

IR2110 (Gate driver) ACS712 (Current sensor)

💡

LED Lighting

The STM32F334C8T6 is used in advanced LED lighting systems for dimming and color control. The HRTIM provides high-resolution PWM for precise brightness control, while the ADC monitors LED current for constant-current regulation. The device supports multiple channels, enabling RGB color mixing. In a typical LED driver, the MCU generates PWM signals to control a buck converter, maintaining a constant current through the LED string. The HRTIM's high resolution minimizes flicker, even at low dimming levels. The FPU enables smooth color transitions and gamma correction. Compared to dedicated LED driver ICs, the STM32F334C8T6 offers flexibility for complex lighting effects. Designers should ensure proper thermal management, as LED drivers can dissipate significant power.

Recommended

LM3409 (LED driver) IR2110 (Gate driver)

🏭

Industrial Automation

The STM32F334C8T6 is suitable for industrial automation, including PLCs, motor drives, and robotic controllers. Its rich set of communication interfaces (USART, SPI, I2C, CAN, USB) enables connectivity to sensors, actuators, and industrial networks. The advanced timers provide precise timing for motion control, while the ADC and DAC interface with analog sensors and actuators. In a typical PLC, the MCU reads digital inputs, executes logic, and drives outputs. The CAN interface allows communication with other controllers in a factory network. The device's robust design, with a wide temperature range and low power consumption, makes it reliable in harsh environments. Compared to dedicated PLC chips, the STM32F334C8T6 offers programmability and cost-effectiveness. Designers should implement proper isolation for industrial interfaces to protect the MCU from electrical noise.

Recommended

SN65HVD230 (CAN transceiver) ISO7741 (Digital isolator)

🔧

Test and Measurement Equipment

The STM32F334C8T6 is used in test and measurement equipment, such as data loggers, signal generators, and power analyzers. Its high-resolution ADC and DAC enable accurate signal acquisition and generation. The FPU accelerates digital signal processing, such as filtering and FFT. In a typical data logger, the MCU samples analog signals at high speed, stores data in Flash, and communicates via USB. The HRTIM can generate precise trigger signals for synchronized measurements. The device's low power consumption is beneficial for battery-powered instruments. Compared to dedicated measurement ICs, the STM32F334C8T6 offers flexibility and integration. Designers should ensure a clean analog supply for the ADC to achieve high accuracy.

Recommended

AD8221 (Instrumentation amplifier) REF5025 (Voltage reference)

Recommended Products Summary

L6230PD Three-phase motor driver Used in: Field-Oriented Control (FOC) of Brushless DC Motors ACS712 Current sensor Used in: Field-Oriented Control (FOC) of Brushless DC Motors, Solar Inverters IR2110 Gate driver Used in: Digital Power Supplies (Buck, Boost, Flyback), Solar Inverters, LED Lighting TL431 Voltage reference Used in: Digital Power Supplies (Buck, Boost, Flyback) LM3409 LED driver Used in: LED Lighting SN65HVD230 CAN transceiver Used in: Industrial Automation ISO7741 Digital isolator Used in: Industrial Automation AD8221 Instrumentation amplifier Used in: Test and Measurement Equipment REF5025 Voltage reference Used in: Test and Measurement Equipment

What is the maximum clock speed of STM32F334C8T6?

The STM32F334C8T6 operates at a maximum clock speed of 72 MHz. According to the STMicroelectronics datasheet, the ARM Cortex-M4 core with FPU can run at up to 72 MHz, providing 90 DMIPS performance.

How much Flash memory does STM32F334C8T6 have?

The STM32F334C8T6 has 64 KB of Flash memory. This is sufficient for many motor control and digital power applications, but for larger code, consider the STM32F334R8T6 with 64 KB Flash in a 64-pin package.

What is the difference between STM32F334C8T6 and STM32F334R8T6?

The STM32F334C8T6 comes in a 48-pin LQFP package with 37 I/Os, while the STM32F334R8T6 is in a 64-pin LQFP with 51 I/Os. Both have the same core, Flash, and SRAM, but the R8 variant offers more GPIOs and additional peripherals. They are not pin-compatible due to different package sizes.

Can STM32F334C8T6 be used for motor control?

Yes, the STM32F334C8T6 is specifically designed for motor control. It features a high-resolution timer (HRTIM) with 217 ps resolution, advanced timers with dead-time generation, and a fast 12-bit ADC, making it ideal for field-oriented control (FOC) of brushless DC motors.

What is the operating voltage range of STM32F334C8T6?

The STM32F334C8T6 operates from 2.0V to 3.6V. This wide range allows flexible power supply design, but for ADC accuracy, it is recommended to use a stable 3.3V supply with proper decoupling.

Does STM32F334C8T6 have a floating-point unit?

Yes, the STM32F334C8T6 includes a single-precision floating-point unit (FPU) as part of the ARM Cortex-M4 core. This accelerates mathematical operations in control algorithms, such as PID loops and FOC calculations.

What is the price of STM32F334C8T6?

As of 2026-08-13, the price of STM32F334C8T6 is approximately $6.50 for single-unit quantities, decreasing to $4.16 at 1000 units. Prices may vary by distributor and volume.

Where can I buy STM32F334C8T6?

STM32F334C8T6 is available from major distributors such as DigiKey, Mouser, and Arrow. You can also purchase directly from STMicroelectronics' authorized distributors. Check stock availability on their websites.

What is the lead time for STM32F334C8T6?

The typical lead time for STM32F334C8T6 is 8-12 weeks for large orders, but small quantities may be available immediately from distributors. As of 2026-08-13, DigiKey and Mouser show stock available.

Is STM32F334C8T6 in stock?

As of 2026-08-13, STM32F334C8T6 is in stock at major distributors like DigiKey and Mouser. However, stock levels can change rapidly, so check the distributor websites for real-time availability.

STM32F334C8T6 vs STM32F303C8T6 - which is better for digital power?

The STM32F334C8T6 is better for digital power due to its high-resolution timer (HRTIM) with 217 ps resolution, which is essential for precise PWM generation in switch-mode power supplies. The STM32F303C8T6 lacks HRTIM and is more suited for general-purpose applications.

When should I choose STM32F334C8T6 over STM32F303C8T6?

Choose STM32F334C8T6 when you need high-resolution PWM for digital power conversion, motor control, or lighting. The HRTIM provides superior timing resolution compared to the STM32F303C8T6's standard timers, enabling more efficient and accurate control.

What is the best drop-in replacement for STM32F334C8T6?

The best drop-in replacement for STM32F334C8T6 is the STM32F334C8T7, which is pin-compatible and offers the same features but with an extended temperature range of -40°C to +105°C. Other pin-compatible options include STM32F334C6T6 (32 KB Flash) and STM32F334C4T6 (16 KB Flash).

Can STM32F334R8T6 replace STM32F334C8T6?

No, the STM32F334R8T6 is not a drop-in replacement because it has a different package (64-pin LQFP vs 48-pin LQFP) and is not pin-compatible. You would need to redesign the PCB to use the R8 variant.

Where can I download the STM32F334C8T6 datasheet PDF?

You can download the STM32F334C8T6 datasheet PDF from the STMicroelectronics website at https://www.st.com/resource/en/datasheet/stm32f334c8.pdf. It is also available on distributor websites like DigiKey and Mouser.

Where can I find the STM32F334C8T6 pinout?

The STM32F334C8T6 pinout is detailed in the datasheet on pages 24-30. You can also find the pinout in the STM32CubeMX tool, which provides a graphical pin configuration interface.

What are the key specifications of STM32F334C8T6 that engineers should know?

Engineers should know that the STM32F334C8T6 features a 72 MHz ARM Cortex-M4 core with FPU, 64 KB Flash, 12 KB SRAM, a high-resolution timer with 217 ps resolution, a 12-bit ADC with 21 channels, and a 12-bit DAC. It operates from 2.0V to 3.6V and is available in a 48-pin LQFP package.

Hey Google, what can replace STM32F334C8T6?

The STM32F334C8T6 can be replaced by pin-compatible STM32F334 series variants such as STM32F334C8T7 (extended temperature) or STM32F334C6T6 (less Flash). For cross-brand alternatives, consider the NXP LPC1517JBD64 or the Microchip PIC32MX170F256B, but verify pin compatibility.

Is STM32F334C8T6 the same as STM32F334C6T6?

No, the STM32F334C8T6 has 64 KB Flash, while the STM32F334C6T6 has 32 KB Flash. They are pin-compatible and share the same package, but the C6 variant has less memory, so code size must be considered.

What is the best NXP equivalent for STM32F334C8T6?

A potential NXP equivalent is the LPC1517JBD64, which offers a Cortex-M3 core at 72 MHz with 64 KB Flash. However, it lacks the high-resolution timer and advanced analog peripherals of the STM32F334C8T6, so it is not a drop-in replacement.

Engineering reference data for STM32F334C8T6 — comparison, design guidance, and compliance information.

Selection Guide

Choose the STM32F334C8T6 when you need a high-resolution timer for digital power conversion, motor control, or LED lighting. It offers 217 ps PWM resolution, a 72 MHz Cortex-M4 core with FPU, and 64 KB Flash. If you require an extended temperature range, select the STM32F334C8T7. For applications with smaller code size, the STM32F334C6T6 (32 KB Flash) or STM32F334C4T6 (16 KB Flash) are cost-effective alternatives with the same pinout. If you do not need the HRTIM and require more SRAM, consider the STM32F303C8T6, which offers 16 KB SRAM but lacks the high-resolution timer. For cross-brand options, the NXP LPC1517JBD64 is not pin-compatible and requires a redesign, so it is only suitable for new designs.

Comparison with Alternatives

Parameter	This Product	STM32F334C8T7	STM32F334C6T6	STM32F334C4T6	STM32F303C8T6
Package	LQFP-48	LQFP-48	LQFP-48	LQFP-48	LQFP-48
Brand	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics	STMicroelectronics
Core	ARM Cortex-M4 with FPU	ARM Cortex-M4 with FPU	ARM Cortex-M4 with FPU	ARM Cortex-M4 with FPU	ARM Cortex-M4 with FPU
Maximum Clock Speed	72 MHz	72 MHz	72 MHz	72 MHz	72 MHz
Flash Memory	64 KB	64 KB	32 KB	16 KB	64 KB
SRAM	12 KB	12 KB	12 KB	12 KB	16 KB
High-Resolution Timer (HRTIM)	Yes (217 ps)	Yes (217 ps)	Yes (217 ps)	Yes (217 ps)	No
Operating Temperature Range	-40C to +85C	-40C to +105C	-40C to +85C	-40C to +85C	-40C to +85C

Key Differentiators

High-resolution timer (HRTIM) with 217 ps resolution (vs STM32F303C8T6)
Extended temperature range option (STM32F334C8T7) (vs STM32F334C8T6)
Pin-compatible family with multiple Flash sizes (vs STM32F334C6T6)

Design Notes

Decouple each VDD pin with a 100 nF ceramic capacitor placed as close as possible to the pin. Additionally, use a 4.7 uF bulk capacitor on the main VDD rail. The VDDA pin must be connected to a clean analog supply, and VREF+ should be filtered with a 1 uF capacitor to ensure ADC accuracy. For battery-powered designs, connect VBAT to a backup battery or tie it to VDD through a diode.

For optimal ADC performance, route analog signals away from digital traces and use a ground plane. Place the crystal oscillator (if used) close to the OSC_IN/OSC_OUT pins with load capacitors as specified in the datasheet. For motor control applications, keep the power stage separate from the MCU to minimize noise coupling. Use a 4-layer PCB with dedicated power and ground planes for best EMC performance.

Ensure the BOOT0 pin is properly configured to select the correct boot mode. If using SWD for programming, connect PA13 (SWDIO) and PA14 (SWCLK) with pull-up/pull-down resistors as recommended. Do not exceed the absolute maximum ratings for supply voltage (3.6V) or I/O pins. For high-resolution timer applications, verify the HRTIM clock source and configuration to avoid unexpected PWM behavior.