My Inquiry
My Account
STMicroelectronics STM8AL3146UCX
- Part No.:
- STM8AL3146UCX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
STM8AL3146UCX.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,250
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM8AL3146UCX from STMicroelectronics is an AEC-Q100 qualified automotive-grade 8-bit ultra-low-power MCU featuring 32 Kbyte Flash, 2 Kbyte RAM, 1 Kbyte data EEPROM, 12-bit ADC (25 channels, up to 1 Mbps), 12-bit DAC with output buffer, two ultra-low-power comparators, RTC with BCD calendar and auto-wakeup, and integrated LCD controller supporting up to 4×28 segments. It operates from 1.65 V to 3.6 V across –40 °C to 125 °C and targets battery-powered automotive body electronics.
For engineers reviewing the STM8AL3146UCX datasheet, STM8AL3146UCX pinout, STM8AL3146UCX application, or STM8AL3146UCX equivalent, key selection criteria include ultra-low-power operation in active-halt mode (1.3 μA), fast 4.7 µs wakeup from Halt, 41 mappable I/Os with interrupt capability, and dual oscillator support (1–16 MHz HSE + 32 kHz LSE) for robust timing in harsh environments.
Technical Context
The STM8AL3146UCX implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates factory-trimmed 16 MHz RC, 38 kHz low-consumption RC, and dual crystal oscillators (HSE/LSE), all monitored by a clock security system.
Power management includes five configurable low-power modes-Wait, low-power Run (5.1 μA), low-power Wait (3 μA), active-Halt with full RTC (1.3 μA), and Halt with PDR (400 nA)-and supports ultra-low leakage per I/O (50 nA) with fast 4.7 µs wake-up from Halt mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Harvard, 3-stage pipeline STM8 CPU; enables deterministic execution and efficient code density for resource-constrained automotive firmware. |
| Max Clock Frequency | 16 MHz; delivers 16 CISC MIPS peak performance while maintaining ultra-low power consumption in automotive temperature range. |
| Flash Memory | 32 Kbyte; supports 20-year data retention at 55 °C and in-system programming via SWIM interface for field updates. |
| ADC Resolution & Speed | 12-bit, up to 1 Mbps sampling rate across 25 channels; includes internal temp sensor and reference voltage for self-calibration. |
| DAC Output | 12-bit with integrated output buffer; drives analog actuators or reference signals directly without external op-amp buffering. |
| Low-Power Halt Current | 400 nA with PDR enabled; enables multi-year battery life in always-on automotive modules such as door controllers or seat position sensors. |
| RTC Accuracy | 0.95 ppm resolution with auto-wakeup from Halt; provides precise timekeeping for periodic wake-up events in telematics or alarm systems. |
Pinout & Package
LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, ECOPACK2 certified. Pin count and function mapping align with STM8AL31x6U variant (no LCD).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation under automotive load transients. |
| NRST | Active-low reset input | Supports ultra-low-power POR/PDR and programmable voltage detector (PVD) for fail-safe system initialization. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/Os | All 41 pins mappable to interrupt vectors; PA0 features high-sink LED driver capability for direct panel illumination control. |
| OSC_IN / OSC_OUT | HSE crystal oscillator terminals | Supports 1–16 MHz external crystal; paired with clock security system to detect oscillator failure and trigger safe state transition. |
| LSI / LSE_IN / LSE_OUT | Low-speed internal/external oscillators | LSE (32 kHz) drives RTC independently during Halt; LSI provides backup clock for watchdog and beeper timer. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive use from –40 °C to 125 °C ambient, meeting stringent reliability and ESD requirements (±4 kV HBM). |
| Ultra-low-power RTC with BCD calendar | Enables calendar-based wake-up every second, minute, hour, or day-critical for infotainment sleep scheduling and remote keyless entry timers. |
| Dual comparator architecture | One rail-to-rail comparator with fixed threshold and one with adjustable threshold; both support wakeup-from-Halt for windowed voltage monitoring. |
| SWIM debug interface | Single-wire non-intrusive on-chip debugging and fast Flash programming; eliminates need for JTAG header space in compact PCB layouts. |
| Memory protection unit (MPU) | Prevents accidental writes to option bytes and critical memory regions-essential for functional safety compliance in ASIL-B designs. |
Applications
| Automotive Door Module | Smart Rearview Mirror |
|---|---|
Use Scenario: Centralized control of power windows, locks, mirrors, and interior lighting in vehicle door assemblies. IC Role / Device Role / Timing Role: Main system controller executing real-time motor sequencing, LIN communication, and fault diagnostics. Use Value: Ultra-low-power Halt mode (400 nA) extends battery backup runtime during vehicle sleep; 41 mappable I/Os simplify integration of multiple sensors and drivers. |
Use Scenario: Adaptive mirror dimming, blind-spot detection indicator, and ambient light sensing in electrochromic rearview mirrors. IC Role / Device Role / Timing Role: Analog signal conditioner and display controller managing ADC inputs, DAC-driven bias voltages, and LCD segment drive. Use Value: Integrated 12-bit ADC and DAC eliminate external signal chain components; LCD controller supports 4×28 segments for multi-function status display. |
| Engine Bay Sensor Hub | Seat Position Controller |
Use Scenario: Aggregation and preprocessing of temperature, pressure, and humidity readings near engine compartment. IC Role / Device Role / Timing Role: Low-power data acquisition node with RTC timestamping and SPI/I²C sensor interfacing. Use Value: Active-Halt mode (1.3 μA with RTC) enables continuous logging without draining 12 V battery; internal temp sensor reduces BOM cost. |
Use Scenario: Motorized seat adjustment with position feedback, memory recall, and collision detection via current sensing. IC Role / Device Role / Timing Role: Real-time motor control unit using TIM1 advanced timer for PWM generation and quadrature encoder input capture. Use Value: 16-bit advanced control timer supports three-phase commutation; comparators enable overcurrent detection with sub-microsecond response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power automotive MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AL3L46UCX | Includes integrated LCD controller (4×28 segments); same Flash/RAM but adds step-up converter and LCD bias generation. | Required for automotive displays (e.g., instrument clusters, HVAC panels); not suitable if LCD is unused. | Select only when driving segmented LCDs; otherwise, STM8AL3146UCX offers lower quiescent current in non-LCD applications. |
| STM8L152C6T6 | Non-automotive grade (industrial temp only); lacks AEC-Q100 qualification, lower max frequency (16 MHz vs 16 MHz), no LIN/ISO 7816 USART support. | Suitable for non-safety-critical consumer or industrial devices; cannot replace in automotive production without requalification. | Use only in cost-sensitive non-automotive designs where AEC-Q100 and LIN are unnecessary. |
Compared with STM8AL3L46UCX, the STM8AL3146UCX saves ~200 nA in Halt mode by omitting LCD circuitry; compared with STM8L152C6T6, it adds automotive qualification, LIN support, and enhanced ESD robustness-making it the sole choice for production-grade body electronics.
Availability
STM8AL3146UCX is available at Aetrix Electronics and suitable for automotive door modules, smart rearview mirrors, engine bay sensor hubs, and seat position controllers requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for STM8AL3146UCX 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 ICs, sensors, and automotive ASICs since 1987.
The STM8AL3x series targets ultra-low-power automotive body electronics, emphasizing AEC-Q100 reliability, extended temperature operation, and integrated peripherals to reduce system-level BOM and PCB area.
FAQ
What is the maximum operating temperature for STM8AL3146UCX?
The STM8AL3146UCX is rated for operation from –40 °C to +125 °C ambient temperature and is AEC-Q100 Grade 1 qualified. This rating applies to the full specification-including Flash endurance, RTC accuracy, and ADC linearity-under continuous operation with proper thermal design and PCB copper pour.
Does STM8AL3146UCX support LIN 2.0 communication?
Yes, the integrated USART supports LIN 2.0 protocol via hardware baud rate generation and automatic sync-break detection. It complies with ISO 17987-4 and includes dedicated LIN-specific registers for header checksum calculation and response timeout handling.
How many I/O pins support external interrupt capability?
All 41 general-purpose I/O pins on the STM8AL3146UCX can be individually configured to generate external interrupts. Each port group (PA–PD) has dedicated interrupt vector mapping, enabling edge-triggered wake-up from any low-power mode including Halt and active-Halt.
Is SWIM debugging supported in low-power modes?
SWIM debugging remains fully functional in Run, Wait, and low-power Run modes. However, it is disabled in active-Halt and Halt modes to preserve ultra-low current; debugging resumes automatically upon wake-up triggered by RTC, comparator, or external interrupt.
STM8AL3146UCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- STM8A
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, IrDA, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, DMA, POR, PWM, WDT
- Number of I/O:
- 30
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 3.6V
- Data Converters:
- A/D 22x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AL3146UCX FAQ
1.How can I place an order for STM8AL3146UCX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3146UCX 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 STM8AL3146UCX reliable?
The price and inventory of STM8AL3146UCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3146UCX is usually 5 days.
3.What payment methods are accepted for STM8AL3146UCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3146UCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3146UCX?
STM8AL3146UCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3146UCX 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 STM8AL3146UCX?
For technical support, including STM8AL3146UCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3146UCX requirements.
6.How does Aetrix verify that STM8AL3146UCX is sourced from the original manufacturer or authorized distributors?
All STM8AL3146UCX 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 STM8AL3146UCX meets industry standards.
7.What is the process for return or replacement of STM8AL3146UCX?
All STM8AL3146UCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3146UCX, 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 STM8AL3146UCX part is unused and in its original packaging.
Return procedure for STM8AL3146UCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM8AL3146UCX 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…
