My Inquiry
My Account
STMicroelectronics STM32L433CBT6
- Part No.:
- STM32L433CBT6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM32L433CBT6.pdf
- Description:
- IC MCU 32BIT 128KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:15,800
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM32L433CBT6 from STMicroelectronics is an ultra-low-power Arm® Cortex®-M4 32-bit MCU with FPU, operating up to 80 MHz (100 DMIPS), featuring 128 KB flash, 64 KB SRAM, USB FS, LCD controller, and integrated SMPS support. It delivers 36 µA/MHz in SMPS-run mode, 280 nA Standby with RTC, and supports capacitive touch sensing for battery-powered human-interface applications.
For engineers reviewing the STM32L433CBT6 datasheet, STM32L433CBT6 pinout, STM32L433CBT6 application, or STM32L433CBT6 equivalent, key selection criteria include verified low-power mode current values (e.g., 28 nA Standby), LCD driver capability (8×40 segment), USB crystal-less full-speed operation, and LQFP48 package compatibility with legacy STM32L0/L1 footprint constraints.
Technical Context
The device integrates an Adaptive Real-time Accelerator (ART™) enabling zero-wait-state execution from flash at 80 MHz, paired with a memory protection unit (MPU) and dual-voltage domain architecture supporting external SMPS (VDD12 = 1.05–1.10 V) for optimized power efficiency. Its interconnect matrix decouples bus arbitration between CPU, DMA, and peripherals to sustain deterministic real-time performance.
Low-power operation is enforced via FlexPowerControl with five distinct sleep states - including Stop 2 (1.28 µA + RTC) and Shutdown (8 nA) - each validated with hardware wakeup on up to five dedicated pins. The embedded 32 kHz LSE oscillator calibrates internal clock sources to ±0.25% accuracy, enabling precise RTC and timer synchronization without external crystals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | Arm Cortex-M4 with FPU, 80 MHz max, 100 DMIPS - enables floating-point sensor fusion and real-time control loops |
| Memory | 128 KB flash (single-bank), 64 KB SRAM (16 KB parity-protected) - sufficient for secure bootloader + RTOS + application code |
| Power Consumption | 36 µA/MHz in SMPS-run mode - reduces system-level battery drain in always-on portable devices |
| Low-Power Modes | 28 nA Standby (5 wakeup pins), 280 nA Standby+RTC - extends shelf life and operational runtime in energy-harvesting nodes |
| Peripherals | USB 2.0 FS crystal-less, LCD 8×40, 21-channel TSC, 12-bit ADC @ 5 Msps - supports integrated display, touch UI, and analog sensing without external ICs |
| Package | LQFP48 (7 × 7 mm), ECOPACK2-compliant - compatible with standard reflow processes and space-constrained PCB layouts |
| Clock System | Dual PLLs, auto-trimmed 4–48 MHz internal oscillator (±0.25%), 32 kHz LSE - eliminates need for external timing components in cost-sensitive designs |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), 48-pin quad flat pack with exposed thermal pad; RoHS-compliant and ECOPACK2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Main power supply and ground | Supports 1.71–3.6 V operation; decoupling required per datasheet layout guidelines |
| VBAT | Backup power supply | Enables RTC and 32×32-bit backup registers during main power loss (200 nA quiescent) |
| PA0–PA15, PB0–PB15, PC0–PC15, PD2 | General-purpose I/Os | Up to 42 5 V-tolerant GPIOs; configurable as EXTI, AF, or analog inputs |
| PA9/PA10 | USB_DM/USB_DP | Crysal-less USB FS interface - requires internal transceiver calibration and specific PCB routing |
| PC10/PC11 | LCD_COM0/LCD_SEG0 | Drive 8×40 or 4×44 LCD segments directly - eliminates external LCD driver IC |
| PF0–PF1 | TSC_CHx | Capacitive sensing channels - support touchkey, slider, and rotary input with hardware-accelerated acquisition |
Key Features
| Feature | Design Value |
|---|---|
| FlexPowerControl architecture | Five low-power modes with sub-µA quiescent currents - enables multi-year battery life in IoT endpoints |
| ART Accelerator™ | Zero-wait-state flash execution at 80 MHz - eliminates cache misses in time-critical interrupt handlers |
| Integrated SMPS support | External buck converter interface (VDD12) - improves system efficiency by 30–40% vs. LDO-only operation |
| Hardware LCD controller | 8×40 segment drive with internal step-up converter - reduces BOM count and PCB area for display subsystems |
| Capacitive touch sensing (TSC) | 21-channel acquisition with noise immunity and automatic calibration - enables robust touch UI without external controllers |
| Crystal-less USB FS | Internal clock recovery system (CRS) synchronized to USB SOF - removes 12 MHz crystal and associated load caps |
Applications
| Wearable Health Monitor | Smart Utility Meter |
|---|---|
Use Scenario: Continuous ECG/PPG signal acquisition and local display on segmented LCD with Bluetooth LE data offload. IC Role / Device Role / Timing Role: Main application processor executing sensor fusion algorithms, driving LCD segments, and managing USB/UART communication. Use Value: 280 nA Standby+RTC enables >5-year coin-cell operation; integrated TSC and LCD eliminate 2 external ICs. | Use Scenario: Tamper-resistant electricity meter with real-time tariff calculation, LCD display, and optical/IR pulse output. IC Role / Device Role / Timing Role: Secure metering controller with CRC-protected flash, hardware RTC calendar, and isolated serial interfaces. Use Value: 128 KB flash accommodates dual-bank firmware updates; 32-bit backup registers retain billing data during power failure. |
| Industrial Wireless Sensor Node | Portable Medical Diagnostic Device |
Use Scenario: Battery-powered vibration/temperature node transmitting data via LoRaWAN using LPUART wake-up and low-power timers. IC Role / Device Role / Timing Role: Low-power host MCU coordinating sensor sampling, RF transmission scheduling, and deep-sleep state management. Use Value: 8 nA Shutdown mode with 5 wakeup pins allows event-driven operation; LPUART retains communication capability in Stop 2 mode. | Use Scenario: Handheld blood glucose or oximeter with touch UI, analog front-end, and USB charging/data export. IC Role / Device Role / Timing Role: Integrated analog-digital controller handling ADC oversampling, DAC-based reference generation, and capacitive touch response. Use Value: 12-bit ADC @ 5 Msps with hardware oversampling achieves 16-bit effective resolution; built-in opamp + PGA simplifies analog signal conditioning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM32L432KBU6 | 64 KB flash, no LCD controller, UFBGA32 package (32-pin) | Lacks integrated LCD and reduced peripheral count - suitable for non-display sensor hubs | Select when display functionality is unnecessary and board space is extremely constrained |
| STM32L476RGT6 | 1 MB flash, 128 KB SRAM, USB HS, no SMPS support, LQFP64 | Higher memory and USB speed but higher active current (84 µA/MHz LDO mode) and larger package | Choose for feature-rich HMI applications where power budget allows >2× active current |
Compared with STM32L432KBU6, STM32L433CBT6 adds LCD and 64 KB more flash at identical package size; versus STM32L476RGT6, it trades flash capacity and USB speed for 57% lower run-mode current and integrated SMPS control - making it optimal for compact, battery-critical displays.
Availability
STM32L433CBT6 is available at Aetrix Electronics and suitable for wearable health monitors, smart utility meters, industrial wireless sensor nodes, and portable medical diagnostic devices requiring stable component supply across extended production lifecycles.
Supply support for STM32L433CBT6 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, designing and manufacturing microcontrollers, power management ICs, sensors, and analog products for industrial, automotive, and consumer markets.
The STM32L4 series targets ultra-low-power embedded applications demanding high performance-per-milliwatt, with emphasis on battery longevity, integrated peripherals, and security features for edge-connected devices.
FAQ
What is the maximum operating temperature range for STM32L433CBT6?
The STM32L433CBT6 is qualified for industrial operation from –40 °C to +85 °C. This rating is validated per ST's production test flow and applies to all LQFP48 variants; extended temperature versions (105 °C, 125 °C) exist under different part numbers (e.g., STM32L433RCT6X).
Does STM32L433CBT6 support external memory expansion?
Yes - it includes a Quad SPI (QUADSPI) interface supporting up to 128 MB of external serial flash or RAM. The controller handles command/address/data phases autonomously, freeing the CPU during memory transfers and enabling XIP (execute-in-place) operation.
Can the internal SMPS controller drive an external DC-DC converter?
No - STM32L433CBT6 does not integrate an SMPS controller. Instead, it provides voltage scaling control signals (VOS, VDD12_EN) and monitoring (VDD12_RDY) to coordinate with an external buck converter supplying VDD12 (1.05–1.10 V) for core logic, reducing overall system power by ~35% versus LDO operation.
Is the LCD controller capable of driving graphic displays?
No - the integrated LCD controller supports only static or multiplexed segment-type displays (up to 8 commons × 40 segments or 4 commons × 44 segments). It lacks frame buffer, pixel-addressable RAM, or RGB interface required for dot-matrix or TFT graphic displays.
STM32L433CBT6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM32L4
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- ARM® Cortex®-M4
- Core Size:
- 32-Bit Single-Core
- Speed:
- 80MHz
- Connectivity:
- CANbus, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, USB
- Peripherals:
- Brown-out Detect/Reset, DMA, LCD, PWM, WDT
- Number of I/O:
- 38
- Program Memory Size:
- 128KB (128K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 64K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.71V ~ 3.6V
- Data Converters:
- A/D 10x12b; D/A 2x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM32L433CBT6 FAQ
1.How can I place an order for STM32L433CBT6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM32L433CBT6 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 STM32L433CBT6 reliable?
The price and inventory of STM32L433CBT6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM32L433CBT6 is usually 5 days.
3.What payment methods are accepted for STM32L433CBT6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM32L433CBT6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM32L433CBT6?
STM32L433CBT6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM32L433CBT6 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 STM32L433CBT6?
For technical support, including STM32L433CBT6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM32L433CBT6 requirements.
6.How does Aetrix verify that STM32L433CBT6 is sourced from the original manufacturer or authorized distributors?
All STM32L433CBT6 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 STM32L433CBT6 meets industry standards.
7.What is the process for return or replacement of STM32L433CBT6?
All STM32L433CBT6 units undergo pre-shipment inspection (PSI). If there is an issue with STM32L433CBT6, 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 STM32L433CBT6 part is unused and in its original packaging.
Return procedure for STM32L433CBT6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM32L433CBT6 Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
