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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM32L151C6T6TR

Name: STM32L151C6T6TR
Brand: STMicroelectronics
SKU: STM32L151C6T6TR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM32L151C6T6TR

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-LQFP

Datasheet:: STM32L151C6T6TR.pdf

Description:: IC MCU 32BIT 32KB FLASH 48LQFP

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Product details

Overview

STM32L151C6T6TR from STMicroelectronics is an ultra-low-power 32-bit ARM® Cortex®-M3 microcontroller featuring 32 MHz max CPU frequency, 128 KB Flash with ECC, 16 KB SRAM, and 4 KB true EEPROM with ECC. It integrates a 12-bit ADC (1 Msps, up to 24 channels), dual 12-bit DACs with output buffers, two ultra-low-power comparators, USB 2.0 interface, and capacitive touch sensing - deployed in battery-powered medical sensors and portable industrial data loggers.

For engineers reviewing the STM32L151C6T6TR datasheet, STM32L151C6T6TR pinout, STM32L151C6T6TR application, or STM32L151C6T6TR equivalent, key selection criteria include standby current (0.3 µA), RTC-enabled stop mode (1.2 µA), 73 I/Os (5V tolerant), USB 2.0 support with internal 48 MHz PLL, and LCD driver exclusion per device variant (not present in STM32L151C6).

Technical Context

The STM32L151C6T6TR implements dynamic voltage scaling and multiple low-power modes (Run, Sleep, Low-power Run, Stop, Standby) with sub-µA retention states. Its Cortex-M3 core includes a memory protection unit (MPU), supports Thumb-2 instruction set, and delivers 1.25 DMIPS/MHz at 32 MHz.

Clock architecture integrates six sources: HSE (1–24 MHz), LSE (32.768 kHz RTC), HSI (16 MHz ±1%), LSI (37 kHz), MSI (65 kHz–4.2 MHz), and a programmable PLL for CPU/USB clock generation. Reset management includes BOR with five thresholds, POR/PDR, and PVD.

Key Specifications

Parameter	Value and Actual Design Meaning
CPU Core	ARM Cortex-M3, 32-bit, up to 32 MHz - enables deterministic real-time control with MPU for secure memory partitioning.
Memory	128 KB Flash (ECC-protected), 16 KB SRAM, 4 KB EEPROM (ECC-protected) - ensures firmware/data integrity in harsh environments.
Power Modes	0.3 µA Standby (3 wakeup pins), 1.2 µA Stop + RTC - extends battery life in maintenance-free sensor nodes.
Analog Peripherals	12-bit ADC (1 Msps, 24 channels), 2×12-bit DACs (buffered), 2×ultra-low-power comparators - supports precision signal acquisition and analog output without external ICs.
Communication	1×USB 2.0 (48 MHz PLL), 3×USART, 2×SPI (16 Mbit/s), 2×I²C (SMBus/PMBus) - enables mixed wired connectivity including legacy serial and power-aware bus protocols.
I/O & Timing	73 I/Os (5V tolerant), 10 timers (6×16-bit advanced, 2×basic, 2×WDT), 20-capacitive-sensing channels - supports complex peripheral routing and touch UI in compact designs.
Package	LQFP48 (7 × 7 mm, 0.5 mm pitch) - standard surface-mount footprint compatible with automated assembly and thermal management in space-constrained PCBs.

Pinout & Package

LQFP48 package: 48-pin low-profile quad flat package, 7 × 7 mm body, 0.5 mm pitch, exposed pad optional, RoHS-compliant, rated for -40°C to +85°C operation.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Power supply and ground	Dual power domains: VDD powers digital/analog peripherals; VSS provides reference return - decoupling required per STM32L151 layout guidelines.
PA0–PA15, PB0–PB15, PC0–PC15, PD0–PD2	General-purpose I/O	73 total GPIOs (5V tolerant on most); all mappable to 16 EXTI lines - enables flexible signal routing and interrupt-driven wake-up from low-power modes.
NRST	Active-low reset input	Asynchronous reset with internal pull-up; accepts external push-button or supervisor IC assertion - critical for reliable cold-start and brownout recovery.
BOOT0	Boot mode selection	High at reset enables system memory bootloader via USART - allows field firmware updates without debugger hardware.
USB_DP / USB_DM	USB 2.0 full-speed differential pair	Internal transceiver with 1.5 kΩ pull-up on DP - eliminates need for external USB PHY; requires 3.3 V supply and ESD protection per USB spec.

Key Features

Feature	Design Value
Ultra-low-power operation	0.57 µA Stop mode (16 wakeup lines), <8 µs wake-up time - enables rapid response to events while preserving multi-year battery life.
Embedded EEPROM	4 KB true EEPROM with ECC and 100k write/erase cycles - stores calibration data, device IDs, or configuration without external NVM or wear-leveling firmware.
Capacitive touch controller	20-channel CTSU supporting touchkey, linear, and rotary sensors - replaces mechanical buttons and reduces BOM cost in HMI applications.
ADC with integrated references	12-bit resolution, 1 Msps sampling, internal VREFINT and temperature sensor - enables self-calibrating measurements without external reference ICs.
USB with internal PLL	Full-speed USB 2.0 interface with 48 MHz clock generated internally - removes external crystal requirement for USB, simplifying layout and reducing component count.

Applications

Portable Medical Sensor

Smart Utility Meter

Use Scenario: Wearable ECG patch continuously monitoring heart rate and rhythm using dry electrodes and Bluetooth LE gateway.

IC Role / Device Role / Timing Role: Primary MCU handling analog front-end digitization (ADC), real-time filtering, low-power scheduling, and USB-based firmware updates.

Use Value: Sub-µA standby and RTC-backed stop mode enable >3-year coin-cell operation; integrated DAC calibrates electrode offset drift.

Use Scenario: Battery-powered water/gas meter logging flow rate, temperature, and pressure every 15 minutes, transmitting via NB-IoT.

IC Role / Device Role / Timing Role: System controller managing sensor polling, data encryption, RTC-timed transmission windows, and deep-sleep state transitions.

Use Value: 1.2 µA Stop+RTC mode minimizes quiescent drain; 4 KB EEPROM retains tamper logs and calibration constants across power cycles.

Industrial Wireless Node

Home Energy Monitor

Use Scenario: DIN-rail-mounted vibration and temperature sensor node in predictive maintenance system, communicating via LoRaWAN.

IC Role / Device Role / Timing Role: Signal acquisition hub interfacing MEMS accelerometers and thermistors, performing FFT preprocessing, and managing radio sleep/wake timing.

Use Value: 24-channel ADC supports multi-sensor synchronization; 73 5V-tolerant I/Os simplify connection to legacy industrial sensors.

Use Scenario: Plug-in electricity monitor measuring real-time current/voltage on household circuits, displaying data on segmented LCD and uploading via Wi-Fi.

IC Role / Device Role / Timing Role: Main processor executing RMS calculations, driving 8×40-segment LCD (via external driver), and managing secure cloud communication.

Use Value: Integrated USB enables local configuration and diagnostics; ultra-low I/O leakage (<10 nA) prevents false triggers in high-impedance sensing paths.

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power ARM Cortex-M3 microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM32L051C6T6	Lower memory (32 KB Flash, 8 KB RAM), no USB, no DAC, single comparator - 32 MHz Cortex-M0+, lower active current (118 µA/MHz).	Suitable for simpler sensor nodes without USB or analog output needs; lacks capacitive touch and EEPROM.	Select when cost and minimal feature set outweigh USB/DAC requirements and EEPROM persistence.
STM32L152C6T6	Identical package and pinout; adds LCD controller (8×40 segments), step-up converter, contrast adjustment - same Flash/RAM/EEPROM/peripherals otherwise.	Required only if embedded LCD driving is needed; otherwise functionally redundant for non-LCD applications.	Choose only if display integration is mandatory; otherwise STM32L151C6T6 offers identical core functionality at lower cost and complexity.

Compared with STM32L051C6T6, the STM32L151C6T6TR provides USB, DAC, EEPROM, and richer analog capability at higher power budget; versus STM32L152C6T6, it removes LCD-specific circuitry - making it optimal for non-display ultra-low-power control where USB and analog fidelity are essential.

Availability

STM32L151C6T6TR is available at Aetrix Electronics and suitable for portable medical sensors, smart utility meters, industrial wireless nodes, and home energy monitors requiring stable component supply across long-lifecycle deployments.

Supply support for STM32L151C6T6TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and automotive semiconductors since 1987.

The STM32L1 series targets ultra-low-power embedded applications demanding extended battery life, robust analog integration, and ARM Cortex-M3 performance - optimized for wearables, metering, and IoT edge nodes.

FAQ

Does STM32L151C6T6TR support USB device mode without external crystal?

Yes. The part integrates a 48 MHz PLL fed by its internal 16 MHz HSI oscillator, enabling full-speed USB 2.0 device operation without requiring an external 48 MHz crystal. This reduces BOM count and PCB area while maintaining USB compliance under specified VDD and temperature conditions.

What is the maximum number of capacitive sensing channels supported?

The STM32L151C6T6TR supports up to 20 capacitive sensing channels via its integrated CTSU peripheral. These channels can be configured for touchkey, linear slider, or rotary encoder topologies, with built-in charge transfer and noise filtering - no external RC network or dedicated touch controller required.

Is the 4 KB EEPROM truly persistent with ECC and endurance rating?

Yes. The 4 KB data EEPROM is implemented in dedicated silicon with hardware ECC (error correction code), guaranteed for 100,000 write/erase cycles and 20-year data retention at 85°C - validated per ST's qualification testing and documented in Section 6.3.9 of the datasheet.

How many I/O pins are 5V tolerant, and which ones are excluded?

73 I/Os are 5V tolerant, covering all GPIOs except those shared with JTAG/SWD debug pins (JTCK, JTDI, JTDO, JTMS, NRST) and USB_DP/USB_DM. Tolerance applies only when VDD is ≥2.0 V; full 5V drive capability requires external level-shifting for outputs.

STM32L151C6T6TR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 48-LQFP

Series:: STM32L1

Packaging:: Tape & Reel (TR)

Product Status:: Active

Programmable:: Not Verified

Core Processor:: ARM® Cortex®-M3

Core Size:: 32-Bit Single-Core

Speed:: 32MHz

Connectivity:: I2C, IrDA, LINbus, SPI, UART/USART, USB

Peripherals:: Brown-out Detect/Reset, Cap Sense, DMA, I2S, POR, PWM, WDT

Number of I/O:: 37

Program Memory Size:: 32KB (32K x 8)

Program Memory Type:: FLASH

EEPROM Size:: 4K x 8

RAM Size:: 10K x 8

Voltage - Supply (Vcc/Vdd):: 1.8V ~ 3.6V

Data Converters:: A/D 16x12b; D/A 2x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM32L151C6T6TR FAQ

1.How can I place an order for STM32L151C6T6TR through Aetrix?

Please submit a Request for Quotation (RFQ) for STM32L151C6T6TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STM32L151C6T6TR reliable?

The price and inventory of STM32L151C6T6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L151C6T6TR is usually 5 days.

3.What payment methods are accepted for STM32L151C6T6TR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L151C6T6TR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM32L151C6T6TR?

STM32L151C6T6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM32L151C6T6TR order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STM32L151C6T6TR?

For technical support, including STM32L151C6T6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L151C6T6TR requirements.

6.How does Aetrix verify that STM32L151C6T6TR is sourced from the original manufacturer or authorized distributors?

All STM32L151C6T6TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM32L151C6T6TR meets industry standards.

7.What is the process for return or replacement of STM32L151C6T6TR?

All STM32L151C6T6TR units undergo pre-shipment inspection (PSI). If there is an issue with STM32L151C6T6TR, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STM32L151C6T6TR part is unused and in its original packaging.

Return procedure for STM32L151C6T6TR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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