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STMicroelectronics STM8AL3L68TAX
- Part No.:
- STM8AL3L68TAX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AL3L68TAX.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,004
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Product details
Overview
STM8AL3L68TAX from STMicroelectronics is an AEC-Q100 qualified automotive-grade 8-bit ultra-low-power MCU with 32 Kbyte Flash, 2 Kbyte RAM, 1 Kbyte data EEPROM, integrated LCD controller (4×28 segments), 12-bit ADC (25 channels, up to 1 Mbps), 12-bit DAC, two ultra-low-power comparators, RTC with calendar and auto-wakeup, and multiple timers including advanced control timer for motor control. 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 STM8AL3L68TAX datasheet, STM8AL3L68TAX pinout, STM8AL3L68TAX application, or STM8AL3L68TAX equivalent, key selection criteria include ultra-low-power operation in active-halt mode (1.3 μA), LCD drive capability with internal step-up converter, automotive temperature range compliance, and SWIM-based non-intrusive debugging support.
Technical Context
The STM8AL3L68TAX 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-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)-with fast 4.7 µs wakeup from Halt. The RTC provides BCD calendar, alarm interrupt, and periodic auto-wakeup with 0.95 ppm resolution when clocked by LSE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard, 3-stage pipeline, 16 MIPS peak at 16 MHz |
| Operating Voltage | 1.65 V to 3.6 V - supports direct connection to automotive battery rails with brownout resilience |
| Temperature Range | –40 °C to +125 °C - qualified per AEC-Q100 Grade 0 for under-hood applications |
| Low-Power Halt Current | 400 nA - enables multi-year battery life in always-on sensor nodes |
| LCD Drive Capability | Up to 4×28 segments with integrated step-up converter - eliminates external bias supply |
| ADC Performance | 12-bit, 25-channel, 1 MSPS sampling - supports high-resolution sensor acquisition with internal reference and temp sensor |
| DAC Output | 12-bit buffered DAC on PB4/PB5/PB6 - enables precision analog actuator control without external DAC |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDDA for analog peripherals, VDD for digital core and I/O |
| NRST | Active-low reset input | Accepts external reset; supports programmable voltage detector (PVD) monitoring |
| SWIM | Single-wire interface for debug/programming | Enables non-intrusive in-circuit debugging and fast flash programming |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7 | General-purpose I/Os | 41 total I/Os; all mappable to interrupt vectors; 50 nA ultra-low leakage per I/O |
| OSC_IN / OSC_OUT | HSE crystal oscillator terminals | Supports 1–16 MHz external crystal for precise timing and clock redundancy |
| LSI_IN / LSI_OUT | LSE crystal oscillator terminals | 32 kHz crystal connection for RTC and ultra-low-power wake-up timing |
| VLCD | LCD voltage supply output | Internal step-up converter output - powers LCD segment/backplane bias directly |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power RTC with calendar | Auto-wakeup from Halt with 0.95 ppm resolution using LSE - enables precise time-triggered sleep scheduling |
| Integrated LCD controller | Drives up to 4×28 segments with internal charge pump - reduces BOM count and PCB area |
| Dual ultra-low-power comparators | One rail-to-rail, one with fixed threshold; both support wakeup - enables low-energy window detection and event triggering |
| Advanced control timer (TIM1) | 16-bit, 3-channel, complementary outputs with dead-time insertion - supports BLDC and stepper motor control |
| SWIM debug interface | Single-pin, non-intrusive on-chip debugging and programming - eliminates JTAG header footprint and simplifies production test |
Applications
| Automotive Instrument Cluster | Smart Door Module |
|---|---|
|
Use Scenario: Driving analog gauges, LED indicators, and segmented LCD displays in vehicle dashboards with minimal power draw between ignition cycles. IC Role / Device Role / Timing Role: Primary MCU managing display refresh, CAN/LIN communication, and real-time gauge updates via PWM and DAC outputs. Use Value: Active-halt mode (1.3 μA) preserves battery during vehicle sleep; integrated LCD driver eliminates external bias IC; AEC-Q100 qualification ensures reliability in thermal cycling environments. |
Use Scenario: Controlling window lift, mirror fold, lock/unlock actuators, and proximity sensing in door modules powered by 12 V battery with intermittent duty cycle. IC Role / Device Role / Timing Role: System controller executing motor sequencing, fault detection, and LIN bus communication with precise timing via advanced timer (TIM1). Use Value: 41 GPIOs enable direct actuator/sensor interfacing; ultra-low leakage I/Os (50 nA) prevent parasitic drain; 125 °C rating supports under-door thermal environment. |
| Engine Bay Sensor Node | Automotive HVAC Control Panel |
|
Use Scenario: Monitoring coolant temperature, pressure, and humidity in engine compartments where ambient temperature exceeds 105 °C. IC Role / Device Role / Timing Role: Signal conditioner and local decision node using internal 12-bit ADC, temp sensor, and comparators to trigger alerts or fan control. Use Value: On-chip 12-bit ADC with internal reference and temp sensor eliminates calibration drift; 125 °C operation avoids external thermal derating; 400 nA halt current extends battery backup life. |
Use Scenario: Managing user interface (LCD + buttons), blower motor speed, and climate zone valves in cabin HVAC systems with strict EMI and low-noise requirements. IC Role / Device Role / Timing Role: Dedicated UI controller handling LCD refresh, touch/key scan, and PWM-driven blower control via TIM2/TIM3. Use Value: Integrated 4×28 LCD controller drives multi-segment display without external driver; I²C and USART support sensor fusion and LIN gateway functions; EMC-tested per automotive standards. |
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 |
|---|---|---|---|
| STM8AL3L48TAX | Same package and core, but 16 Kbyte Flash and no DAC | Suitable for cost-sensitive UI-only applications without analog output needs | Select when DAC and full 32 Kbyte Flash are not required; retains identical low-power modes and LCD capability |
| RL78/F13-GB | Renesas RL78 core, 20 MHz max, 32 Kbyte Flash, no integrated LCD driver | Requires external LCD bias circuitry; higher active current (120 μA/MHz vs 90 μA/MHz in RAM) | Choose if toolchain alignment with RL78 ecosystem or specific peripheral IP (e.g., data flash) is prioritized over LCD integration and lowest standby current |
Compared with STM8AL3L48TAX, the STM8AL3L68TAX adds DAC and Flash capacity for enhanced analog control and firmware flexibility; versus RL78/F13-GB, it delivers superior ultra-low-power performance and native LCD support-critical for space-constrained automotive displays.
Availability
STM8AL3L68TAX is available at Aetrix Electronics and suitable for automotive instrument clusters, smart door modules, engine bay sensor nodes, and HVAC control panels requiring stable component supply across extended temperature and long product lifecycles.
Supply support for STM8AL3L68TAX 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-grade components.
The STM8AL3x series is part of ST's ultra-low-power automotive MCU portfolio, engineered specifically for battery-sensitive body electronics applications demanding AEC-Q100 qualification, extended temperature operation, and integrated analog peripherals.
FAQ
Does STM8AL3L68TAX support LIN 2.0 communication?
Yes, the integrated USART supports LIN 2.0 protocol via hardware-level baud rate generation and break detection. It complies with ISO 17987-4 and includes dedicated LIN-specific registers for sync field handling and checksum calculation-enabling robust node implementation without software overhead.
What is the maximum segment count supported by the LCD controller?
The STM8AL3L68TAX LCD controller supports up to 4 commons and 28 segments (4×28 = 112 segments), with internal step-up converter generating VLCD up to 4.2 V. It supports static, 2-, 3-, and 4-multiplex drive configurations and automatic blink control without CPU intervention.
Can the 12-bit DAC operate independently of the CPU?
Yes-the DAC can be triggered autonomously by TIM2, TIM3, or TIM4 update events, enabling synchronized analog waveform generation (e.g., triangle or sawtooth) without CPU load. Its output buffer drives loads down to 5 kΩ, and the DAC value is accessible via memory-mapped register DAC_DHR12L.
Is SWIM debugging compatible with production firmware lockdown?
Yes-SWIM supports read-out protection (ROP) levels that allow full debug access during development while permitting selective locking (Level 1 or 2) in production to prevent firmware extraction. ROP Level 2 disables SWIM entirely, ensuring secure deployment without exposing debug interfaces.
STM8AL3L68TAX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- Series:
- STM8A
- Packaging:
- Tube
- 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:
- 41
- 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 25x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AL3L68TAX FAQ
1.How can I place an order for STM8AL3L68TAX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3L68TAX 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 STM8AL3L68TAX reliable?
The price and inventory of STM8AL3L68TAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3L68TAX is usually 5 days.
3.What payment methods are accepted for STM8AL3L68TAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3L68TAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3L68TAX?
STM8AL3L68TAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3L68TAX 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 STM8AL3L68TAX?
For technical support, including STM8AL3L68TAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3L68TAX requirements.
6.How does Aetrix verify that STM8AL3L68TAX is sourced from the original manufacturer or authorized distributors?
All STM8AL3L68TAX 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 STM8AL3L68TAX meets industry standards.
7.What is the process for return or replacement of STM8AL3L68TAX?
All STM8AL3L68TAX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3L68TAX, 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 STM8AL3L68TAX part is unused and in its original packaging.
Return procedure for STM8AL3L68TAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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