Product overview
Key Benefits
Extended battery life
Reduce dynamic power consumption with near-threshold and hardware processing technology (supported by the STM32 AI ecosystem).
Cost-effective design
Simplify PCB design, reduce costs with diverse packages, and leverage a robust development ecosystem to accelerate time to market.
New security mechanism
Enhanced device authentication and anticloning capabilities with Coupling and Chaining Bridge (CCB) and in-factory provisioned attestation. Learn more.
Description
The STM32U3C5xx devices belong to an ultra-low-power microcontrollers family (STM32U3 series) based on the high-performance Arm® Cortex®-M33 32-bit RISC core. They operate at a frequency of up to 96 MHz.
The Cortex®-M33 core features a single‑precision FPU (floating‑point unit), that supports all the Arm® single‑precision data‑processing instructions and all the data types.
The Cortex®-M33 core also implements a full set of DSP (digital signal processing) instructions and a MPU (memory protection unit) that enhances the application security.
The STM32U3 series is the first STM32 series based on near‑threshold voltage technology to deliver breakthrough improvement in battery life. With near‑threshold technology, STM32U3 devices reduce the active consumption down to 11 μA/MHz, resulting in significantly longer battery life for any application.
The devices embed high‑speed memories (2‑Mbyte flash memory and 640‑Kbyte SRAM), one Octo/Quad-SPI flash memory interface, an extensive range of enhanced I/Os, peripherals connected to three APB buses, two AHB buses, and a 32‑bit multi‑AHB bus matrix.
The STM32U3C5xx devices embed several protection mechanisms for embedded flash memory and SRAM: readout protection, write protection, secure proprietary code readout protection, secure, and hide protection areas.
The devices embed a hardware signal processor (HSP) to accelerate digital signal processing and compute neural networks.
These devices offer two 12-bit ADCs (2.5 Msps), two comparators, two operational amplifiers, two DAC channels, an internal voltage reference buffer, a low-power RTC, three general-purpose 32-bit timers, two 16-bit PWM timer dedicated to motor control, four general-purpose 16-bit timers, two basic 16-bit timers, and up to four 16‑bit low‑power timers.
The STM32U3C5xx devices embed a low-power digital filter dedicated to audio signals (ADF), with one filter supporting sound-activity detection. In addition, up to 24 capacitive sensing channels are available.
The STM32U3C5xx series also feature standard and advanced communication interfaces such as:
- Four I2Cs
- Two I3Cs
- Four SPIs and one OCTOSPI
- Three USARTs, two UARTs, and one low-power UART
- One SAI
- One SDMMC
- Two FDCANs
- One USB full-speed (host, or device)
And several peripherals reinforcing security:
- 2 AES coprocessors including one with SCA resistance
- One public key accelerator (PKA), SCA resistant
- One HASH (SHA-256) hardware accelerator
- One true random number generator
- Coupling and chaining bridge (CCB)
The STM32U3C5xx devices offer high protection against transient and environmental perturbation attacks thanks to several internal monitoring generating secret data erase in case of attack.
The devices operate in the -40 to +105 °C (+110 °C junction) temperature ranges from a 1.71 to 3.6 V power supply.
Some independent power supplies are supported like an analog independent supply input for ADC, DAC, OPAMPs, and comparators, a 3.3 V dedicated supply input for USB and up to 14 I/Os, that can be supplied independently down to 1.08 V. A VBAT input is available for connecting a backup battery in order to preserve the RTC functionality and to backup 32 32‑bit registers.
The STM32U3C5xx devices offer 15 packages from 48-pin to 144-pin.
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All features
- Includes ST state-of-the-art patented technology.
- Ultra-low-power
- 1.71 V to 3.6 V power supply
- -40 °C to +105 °C temperature range
- VBAT mode: supply for RTC, 32 x 32-bit backup registers
- 1.6 μA Stop 3 mode with 8-Kbyte SRAM
- 3.15 μA Stop 3 mode with full SRAM
- 3.5 μA Stop 2 mode with 8-Kbyte SRAM
- 5.7 μA Stop 2 mode with full SRAM
- 12 μA/MHz Run mode @ 3.3 V, 48 MHz (While(1) SMPS step-down converter mode)
- 15.5 μA/MHz Run mode @ 3.3 V, 48 MHz (CoreMark® SMPS step-down converter mode)
- 20 μA/MHz Run mode @ 3.3 V, 96 MHz (CoreMark® SMPS step-down converter mode)
- Brownout reset (BOR) in all modes except Shutdown mode
- Arm® 32-bit Cortex®-M33 CPU with TrustZone® and FPU
- ART Accelerator
- 8-Kbyte instruction cache allowing 0-wait-state execution from flash and external memories: frequency up to 96 MHz, MPU, 144 DMIPS and DSP instructions
- Mathematical coprocessor
- Hardware signal processor (HSP) for digital signal and artificial intelligence processing
- Power management
- Embedded regulator (LDO) and SMPS step-down converter supporting switch on-the-fly and voltage scaling
- Benchmarks
- 395.4 CoreMark®(4.12 CoreMark®/MHz)
- Memories
- 2-Mbyte flash memory with ECC, 2 banks read-while-write
- 640 Kbytes of SRAM including 384 Kbytes with hardware parity check
- OCTOSPI external memory interface supporting SRAM, PSRAM, NOR, NAND, and FRAM memories
- Security and cryptography
- Arm® TrustZone® and securable I/Os, memories, and peripherals
- Flexible life cycle scheme with RDP and password protected debug
- Root of trust due to unique boot entry and secure hide protection area (HDP)
- Secure firmware installation (SFI) thanks to embedded root secure services (RSS)
- Secure data storage with hardware unique key (HUK)
- Secure firmware upgrade
- Support of Trusted firmware for Cortex®M (TF-M)
- Two AES coprocessors, one with side channel attack resistance (SCA) (SAES)
- Public key accelerator, SCA resistant
- Key hardware protection
- Attestation keys
- HASH hardware accelerator
- True random number generator, NIST SP800-90B compliant
- 96-bit unique ID
- 512-byte OTP (one-time programmable)
- Antitamper protection
- Clock management
- 4 to 50 MHz crystal oscillator
- 32.768 kHz crystal oscillator for RTC (LSE)
- Internal 16 MHz factory-trimmed RC (±1 %)
- Internal low-power RC with frequency 32 kHz or 250 Hz (±5 %)
- 2 internal multispeed 3 MHz to 96 MHz oscillators
- Internal 48 MHz with clock recovery
- Accurate MSI in PLL-mode and up to 96 MHz with 32.768 kHz, 16 MHz, or 32 MHz crystal oscillator
- General-purpose inputs/outputs
- Up to 114 fast I/Os with interrupt capability most 5 V-tolerant, and up to 14 I/Os with independent supply down to 1.08 V
- Up to 17 timers and 2 watchdogs
- 2x 16-bit advanced motor‑control, 3x 32‑bit and 4x 16‑bit general purpose, 2x 16‑bit basic, 4x low‑power 16‑bit timers (available in Stop mode), 2x watchdogs, 2x SysTick timer
- RTC with hardware calendar, alarms, and calibration
- Up to 23 communication peripherals
- 1 USB 2.0 full-speed controller. USB full-speed functionality in both device and host modes is supported when using the MSI in PLL mode with the LSE clock.
- 1 SAI (serial audio interface)
- 4 I2C FM+(1 Mbit/s), SMBus/PMBus®
- 2 I3C (SDR), with support of I2C FM+ mode
- 3 USARTs and 2 UARTs (SPI, ISO 7816, LIN, IrDA, modem), 1 LPUART
- 4 SPIs (7 SPIs including 1 with OCTOSPI + 2 with USART)
- 2 CAN FD controllers
- 1 SDMMC interface
- 1 audio digital filter with sound-activity detection
- 12-channel GPDMA controller, functional in Sleep and Stop modes
- Up to 24 capacitive sensing channels
- Support touch key, linear, and rotary touch sensors
- Rich analog peripherals (independent supply)
- 2× 12-bit ADCs 2.5 Msps, with hardware oversampling
- 12-bit DAC module with 2 D/A converters, low-power sample and hold, autonomous in Stop 1 mode
- 2 operational amplifiers with built-in PGA
- 2 ultra-low-power comparators
- CRC calculation unit
- Debug
- Development support: serial-wire debug (SWD), JTAG, Embedded Trace Macrocell™ (ETM)
- All packages are ECOPACK2 compliant
Circuit Diagram
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All resources
| Resource title | Version | Latest update |
|---|
System View Description (1)
| Resource title | Version | Latest update | |||
|---|---|---|---|---|---|
| ZIP | 1.1 | 16 Jul 2025 | 16 Jul 2025 |
IBIS models (1)
| Resource title | Version | Latest update | |||
|---|---|---|---|---|---|
| ZIP | 2.0 | 08 Jul 2025 | 08 Jul 2025 |
BSDL files (2)
| Resource title | Version | Latest update | |||
|---|---|---|---|---|---|
| ZIP | 2.0 | 14 Aug 2025 | 14 Aug 2025 | ||
| ZIP | 3.0 | 02 Mar 2026 | 02 Mar 2026 |
Quality and Reliability
| Part Number | Marketing Status | Package | SMPS | Grade | RoHS Compliance Grade | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|---|
| STM32U3C5VIT6 | Evaluation | LQFP 100 14x14x1.4 mm | - | Industrial | Ecopack2 | 10 | 2026-03-03T00:00:00.000+01:00 | |
| STM32U3C5VIT6Q | Active | LQFP 100 14x14x1.4 mm | Internal | Industrial | Ecopack2 | 10 | 2026-03-03T00:00:00.000+01:00 | |
| STM32U3C5VIY6QTR | Evaluation | WLCSP 99B P0.35 DIE 42A | Internal | Industrial | Ecopack2 | 10 | 2026-03-03T00:00:00.000+01:00 | |
STM32U3C5VIT6
Package:
LQFP 100 14x14x1.4 mmMaterial Declaration**:
STM32U3C5VIT6Q
Package:
LQFP 100 14x14x1.4 mmMaterial Declaration**:
STM32U3C5VIY6QTR
Package:
WLCSP 99B P0.35 DIE 42AMaterial Declaration**:
(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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Sample & Buy
| Part Number | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Operating temperature (°C) | Operating Temperature (°C) (max) | D/A Converters (typ) (12-bit) | Timers (typ) (16-bit) | Timers (typ) (32-bit) | Number of Channels (typ) | SMPS | Number of Channels (typ) | UART (typ) | I/Os (High Current) | Integrated op-amps | Comparator | SPI (typ) | USART (typ) | Number of Channels (typ) | I2S (typ) | Advanced Motor Control Timers | CAN (2.0) | CAN (FD) | ||
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| STM32U3C5VIY6QTR | | | distributors No availability of distributors reported, please contact our sales office |
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| STM32U3C5VIT6Q | | | distributors No availability of distributors reported, please contact our sales office |
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| STM32U3C5VIT6 | | | distributors No availability of distributors reported, please contact our sales office |
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STM32U3C5VIY6QTR Evaluation
STM32U3C5VIT6Q Active
STM32U3C5VIT6 Evaluation
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors