My Inquiry
My Account
STMicroelectronics STM8AL3166UCX
- Part No.:
- STM8AL3166UCX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
STM8AL3166UCX.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 32VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,022
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM8AL3166UCX 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 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 such as smart sensors and dashboard sub-modules.
For engineers reviewing the STM8AL3166UCX datasheet, STM8AL3166UCX pinout, STM8AL3166UCX application, or STM8AL3166UCX equivalent, key selection criteria include its 400 nA halt-mode current, 4.7 µs wakeup time, 1.3 μA active-halt mode with full RTC, 96-bit unique ID, SWIM debug interface, and support for LIN 2.0, IrDA, and ISO 7816 via USART.
Technical Context
The STM8AL3166UCX implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates dual crystal oscillators (1–16 MHz HSE and 32 kHz LSE), factory-trimmed 16 MHz RC, and 38 kHz low-consumption RC, all managed 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 RTC (1.3 μA), and Halt with PDR (400 nA)-and supports fast wake-up, ultra-low I/O leakage (50 nA per pin), and programmable voltage detector (PVD) with BOR reset thresholds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Harvard, 3-stage pipeline STM8 CPU; enables deterministic timing and efficient code execution in safety-critical automotive contexts. |
| Max Clock Frequency | 16 MHz; delivers 16 CISC MIPS peak performance while maintaining ultra-low power consumption in run mode. |
| Flash Memory | 32 Kbyte; retains data for 20 years at 55 °C, suitable for firmware storage in long-lifecycle automotive modules. |
| Data EEPROM | 1 Kbyte true EEPROM; supports 300 kwrite cycles for parameter logging and calibration storage without external memory. |
| ADC Resolution & Speed | 12-bit, up to 1 Mbps sampling rate across 25 channels; enables high-fidelity sensor acquisition in engine control and climate systems. |
| DAC Output | 12-bit with integrated output buffer; provides precise analog actuator control (e.g., valve positioning) without external op-amps. |
| RTC Accuracy | 0.95 ppm resolution with auto-wakeup from Halt; sustains accurate timekeeping for periodic diagnostics and sleep/wake scheduling. |
| Low-Power Halt Current | 400 nA with PDR enabled; extends battery life in always-on vehicle subsystems like door modules and occupancy sensors. |
Pinout & Package
STM8AL3166UCX is housed in a VFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with 32 pins, optimized for space-constrained automotive PCB layouts and thermal performance in under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Supports 1.65–3.6 V operation; dual VDD/VSS pairs reduce noise coupling in mixed-signal operation. |
| NRST | Active-low reset input | Accepts external reset signals; integrates ultra-low-power POR/PDR and programmable BOR with 5 thresholds. |
| SWIM | Single-wire interface for debug | Enables non-intrusive on-chip programming and real-time debugging without dedicated JTAG pins. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/Os | Up to 41 mappable I/Os with interrupt capability; each exhibits ≤50 nA leakage in low-power modes. |
| OSC_IN/OSC_OUT | HSE crystal oscillator terminals | Supports 1–16 MHz external crystals for precise timing in CAN/LIN communication and motor control loops. |
| LSE_IN/LSE_OUT | LSE crystal oscillator terminals | Drives 32 kHz crystal for RTC calendar and ultra-low-power wake-up events independent of main clock. |
| USART_TX/USART_RX | Asynchronous serial interface | Supports LIN 2.0, IrDA, and ISO 7816 protocols; enables direct integration with automotive transceivers and smart cards. |
| ADC_IN0–ADC_IN24 | Analog input channels | 25 dedicated ADC inputs with internal temp sensor and reference voltage; allows simultaneous multi-sensor monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 qualification | Qualified for automotive applications up to Grade 0 (–40 °C to +125 °C), ensuring reliability in harsh under-hood environments. |
| Ultra-low-power RTC | BCD calendar with alarm and periodic interrupt; maintains time accuracy during active-halt at 1.3 μA, enabling predictive maintenance triggers. |
| Integrated LCD controller | Drives up to 4×28 segments with built-in step-up converter; eliminates external bias generation for instrument cluster displays. |
| DMA with peripheral support | Four-channel DMA servicing ADC, DAC, SPI, I²C, USART, and timers; reduces CPU load during high-throughput sensor data transfers. |
| Two rail-to-rail comparators | One with fixed threshold, one with adjustable reference; supports windowed voltage monitoring and fast wake-up from Halt on analog event detection. |
| Advanced timer suite | Includes TIM1 (16-bit advanced control timer with 3 channels), two 16-bit general-purpose timers, and beeper timer (1/2/4 kHz); enables motor FOC, PWM generation, and audible alerts. |
Applications
| Automotive Door Module | Smart HVAC Sensor Node |
|---|---|
Use Scenario: Monitoring window position, lock status, and ambient temperature in vehicle door assemblies. IC Role / Device Role / Timing Role: Central MCU managing GPIO-driven switches, ADC-based thermistor readings, and LIN 2.0 communication with body control module. Use Value: 400 nA Halt-mode current extends battery backup life; 4.7 µs wakeup ensures responsive window anti-pinch reaction. | Use Scenario: Compact, battery-operated air quality and temperature sensing unit mounted inside cabin ductwork. IC Role / Device Role / Timing Role: Low-power sensor aggregator running ADC conversions, comparator-triggered alerts, and periodic UART reporting over LIN bus. Use Value: 1.3 μA active-halt with RTC enables scheduled 15-minute sensor polling without external real-time clock. |
| Instrument Cluster Sub-Display | Engine Bay Diagnostic Logger |
Use Scenario: Driving segmented LCD display for fuel level, gear indicator, and warning icons in mid-tier dashboards. IC Role / Device Role / Timing Role: Dedicated display controller interfacing with 4×28-segment LCD using integrated step-up converter and frame timing logic. Use Value: On-chip LCD driver eliminates external charge pump IC and reduces BOM count by two components. | Use Scenario: Standalone diagnostic node capturing engine coolant temperature, oil pressure, and vibration data during vehicle shutdown periods. IC Role / Device Role / Timing Role: Data logger executing periodic ADC sampling, storing calibrated values in EEPROM, and waking via RTC alarm every 30 minutes. Use Value: 300 kcycle EEPROM endurance supports 10+ years of daily calibration updates without wear-out risk. |
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 |
|---|---|---|---|
| STM8AL3168UCX | Same die, higher Flash density (32 KB vs. 32 KB), but includes additional option bytes and enhanced bootloader features. | Targeted at designs requiring field firmware updates via USART bootloader with extended security options. | Select when secure over-the-air update capability is required beyond basic SWIM programming. |
| RL78/F13 | 16-bit RISC core, 24 MHz max, 128 KB Flash, 10 KB RAM; higher performance but larger footprint and higher active current (120 μA/MHz). | Better suited for complex motor control or multi-protocol gateway functions where STM8AL3166UCX lacks processing headroom. | Choose when migrating from 8-bit to 16-bit architecture is justified by computational load and memory requirements. |
Compared with STM8AL3166UCX, STM8AL3168UCX offers identical low-power behavior and pin compatibility but adds bootloader flexibility, whereas RL78/F13 trades ultra-low standby current for greater throughput and memory-making it appropriate only when the STM8AL3166UCX's 16 MIPS and 32 KB Flash prove insufficient.
Availability
STM8AL3166UCX is available at Aetrix Electronics and suitable for automotive body electronics, battery-powered sensor nodes, and instrument cluster sub-displays requiring stable component supply across extended product lifecycles.
Supply support for STM8AL3166UCX 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 devices, sensors, and analog ICs for automotive, industrial, and consumer markets.
The STM8AL3x series is part of ST's automotive ultra-low-power MCU portfolio, engineered specifically for battery-sensitive applications in body electronics, requiring AEC-Q100 compliance, extended temperature operation, and sub-microamp low-power modes.
FAQ
What is the maximum operating temperature range for STM8AL3166UCX?
The STM8AL3166UCX is rated for operation from –40 °C to +125 °C and is AEC-Q100 Grade 0 qualified. This specification is validated per DS7106 Rev 9 Section 9.3.1, making it suitable for under-hood and cabin-mounted automotive modules where thermal stress is critical.
Does STM8AL3166UCX support LIN 2.0 physical layer directly?
No, STM8AL3166UCX implements the LIN 2.0 protocol stack in firmware via its USART peripheral but requires an external LIN transceiver (e.g., TLE7259-3GE) for physical layer compliance. The USART supports LIN break detection, sync field handling, and checksum calculation per LIN 2.0 specification.
How many I/O pins support external interrupt capability?
All 41 GPIO pins on STM8AL3166UCX are mappable to external interrupt vectors. Each port pin can be individually configured for rising/falling/both-edge triggering, enabling flexible wake-up sources from buttons, sensors, or communication lines without additional logic.
Is the 96-bit unique ID accessible via standard debug interface?
Yes, the factory-programmed 96-bit unique ID is readable via SWIM debug interface at memory addresses 0x4865–0x486A (as defined in DS7106 Rev 9 Section 8). It is also accessible in-application through dedicated system memory registers without requiring special unlock sequences.
STM8AL3166UCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- STM8A
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8
- 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:
- 32KB (32K 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:
STM8AL3166UCX FAQ
1.How can I place an order for STM8AL3166UCX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3166UCX 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 STM8AL3166UCX reliable?
The price and inventory of STM8AL3166UCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3166UCX is usually 5 days.
3.What payment methods are accepted for STM8AL3166UCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3166UCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3166UCX?
STM8AL3166UCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3166UCX 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 STM8AL3166UCX?
For technical support, including STM8AL3166UCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3166UCX requirements.
6.How does Aetrix verify that STM8AL3166UCX is sourced from the original manufacturer or authorized distributors?
All STM8AL3166UCX 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 STM8AL3166UCX meets industry standards.
7.What is the process for return or replacement of STM8AL3166UCX?
All STM8AL3166UCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3166UCX, 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 STM8AL3166UCX part is unused and in its original packaging.
Return procedure for STM8AL3166UCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM8AL3166UCX 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…
