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STMicroelectronics STM8AL3L68TAY
- Part No.:
- STM8AL3L68TAY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AL3L68TAY.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,591
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Product details
Overview
STM8AL3L68TAY 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 BCD calendar and auto-wakeup, and multiple timers including a 16-bit advanced control timer for motor control. It operates from 1.65 V to 3.6 V across –40 °C to 125 °C and targets body electronics, dashboard instrumentation, and smart sensors.
For engineers reviewing the STM8AL3L68TAY datasheet, STM8AL3L68TAY pinout, STM8AL3L68TAY application, or STM8AL3L68TAY equivalent, key selection criteria include its AEC-Q100 qualification, 400 nA halt mode current, 4.7 µs wakeup time, LCD driver capability, and dual comparator architecture with rail-to-rail input and fixed-threshold options.
Technical Context
The STM8AL3L68TAY 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 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 features a programmable voltage detector, ultra-safe BOR with five thresholds, and POR/PDR optimized for automotive transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time execution and efficient code density for safety-critical automotive firmware. |
| Max Clock Frequency | 16 MHz; delivers 16 CISC MIPS peak performance while maintaining ultra-low power consumption in active and low-power modes. |
| Flash Memory | 32 Kbyte Flash with 20-year data retention at 55 °C; supports in-application programming and robust over-the-air update capability. |
| ADC Resolution & Speed | 12-bit ADC, up to 1 Mbps sampling rate across 25 channels; includes internal temperature sensor and reference voltage for self-calibration. |
| Low-Power Halt Current | 400 nA with PDR enabled; enables multi-year battery operation in always-on automotive modules such as door controllers or tire pressure monitors. |
| LCD Driver | Supports up to 4×28 segment LCD with integrated step-up converter; eliminates external bias supply and reduces BOM count in instrument cluster designs. |
| RTC Accuracy | 0.95 ppm resolution with auto-wakeup from Halt; provides precise timekeeping and periodic interrupt generation without CPU intervention. |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK®2 qualified. Pin count and I/O mapping align with STM8AL3Lxx series automotive variant.
| 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 dump and cold-crank conditions. |
| NRST | Active-low reset input | Accepts Schmitt-triggered signal with programmable BOR threshold; supports safe initialization after brownout or ESD event. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7 | General-purpose I/Os | 41 mappable I/Os with interrupt capability; PA0 supports high-sink LED driver (up to 20 mA) for direct indicator control. |
| OSC_IN / OSC_OUT | HSE crystal oscillator interface | Supports 1–16 MHz external crystal; used for precise timing in LIN/USART communication and RTC calibration. |
| LSE_IN / LSE_OUT | LSE crystal oscillator interface | 32 kHz crystal connection for RTC; enables ultra-low-power timekeeping with <1.3 μA active-halt current. |
| VLCD | LCD voltage supply output | Integrated step-up converter generates adjustable VLCD (2.3–5.5 V); eliminates external charge pump in segmented display applications. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40 °C to 125 °C operation with extended reliability testing; meets automotive functional safety prerequisites. |
| Ultra-low leakage per I/O | 50 nA typical leakage; minimizes standby current in systems with high I/O count and long sleep intervals. |
| Dual ultra-low-power comparators | One comparator with rail-to-rail input and one with fixed 1.22 V threshold; enables wake-on-event sensing without ADC overhead. |
| SWIM debug interface | Single-wire non-intrusive debugging; allows full on-chip programming and real-time variable inspection without halting peripheral operation. |
| 96-bit unique ID | Factory-programmed serial number; supports secure boot, device authentication, and traceability in production and field firmware updates. |
Applications
| Automotive Instrument Cluster | Smart Door Control Module |
|---|---|
Use Scenario: Driving digital gauges, warning indicators, and backlight dimming in analog/digital hybrid dashboards. IC Role / Device Role / Timing Role: Primary MCU managing LCD segment drive, PWM-controlled LED backlight, and LIN bus communication with body control module. Use Value: Integrated LCD controller and 4×28 segment support eliminate external display driver IC; 400 nA halt mode extends battery backup runtime during ignition-off periods. |
Use Scenario: Monitoring window lift position, detecting obstacle contact, and controlling power window motor via H-bridge. IC Role / Device Role / Timing Role: Real-time motor control unit using TIM1 advanced timer for complementary PWM generation and comparator-based stall detection. Use Value: 16-bit advanced control timer with dead-time insertion and comparator-triggered emergency stop ensures functional safety compliance in ASIL-B-relevant subsystems. |
| Automotive Tire Pressure Monitor (TPMS) Sensor Node | Engine Bay Ambient Sensor Hub |
Use Scenario: Battery-powered wireless sensor collecting pressure, temperature, and acceleration data for RF transmission. IC Role / Device Role / Timing Role: Ultra-low-power host MCU performing periodic ADC sampling, RTC-timed wakeups, and SPI communication with RF transceiver. Use Value: 1.3 μA active-halt mode with full RTC enables 10+ year battery life; internal 38 kHz RC oscillator reduces external component count and PCB area. |
Use Scenario: Multi-sensor aggregation node measuring coolant temperature, intake air temp, and humidity near engine compartment. IC Role / Device Role / Timing Role: Signal conditioning and preprocessing unit using 12-bit ADC, internal temp sensor, and DAC for analog output calibration. Use Value: On-chip 12-bit DAC (PB4–PB6) provides programmable reference voltage for sensor signal offset correction; 125 °C rating ensures reliable operation in harsh thermal environments. |
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 |
|---|---|---|---|
| STM8AL3L48TAY | Same package and pinout; 16 Kbyte Flash, 1 Kbyte RAM, no DAC, 16-segment LCD support | Suitable for simpler instrumentation or sensor nodes where DAC and extended memory are unnecessary | Select when cost sensitivity outweighs need for DAC or larger program space; retains identical low-power profile and AEC-Q100 qualification. |
| RL78/F13-GB | Renesas RL78 core; 32 Kbyte Flash, 2 Kbyte RAM, but no integrated LCD driver or 32 kHz crystal RTC option | Requires external LCD bias circuitry and separate RTC IC for calendar functions | Choose if existing RL78 toolchain and ecosystem integration are prioritized over integrated display and ultra-low-power RTC autonomy. |
Compared with STM8AL3L48TAY, the STM8AL3L68TAY adds DAC, doubles Flash/RAM, and expands LCD capability-justifying upgrade for feature-rich clusters. Versus RL78/F13-GB, it offers superior integration for LCD-centric automotive HMI with lower total BOM cost and faster time-to-market.
Availability
STM8AL3L68TAY is available at Aetrix Electronics and suitable for automotive body electronics, instrument cluster design, and smart sensor nodes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for STM8AL3L68TAY 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 silicon for industrial, automotive, and consumer markets.
The STM8AL3Lxx series is part of ST's automotive ultra-low-power MCU portfolio, engineered specifically for body electronics, dashboard instrumentation, and battery-sensitive modules requiring AEC-Q100 compliance and sub-microamp sleep currents.
FAQ
Is STM8AL3L68TAY pin-compatible with other STM8AL3Lxx devices in LQFP48?
Yes-STM8AL3L68TAY shares identical LQFP48 pinout with STM8AL3L48TAY and STM8AL3L66TAY. All share the same peripheral mapping, I/O assignment, and power/ground pin locations, enabling hardware reuse across variants with differing Flash size or feature sets.
Does STM8AL3L68TAY support LIN 2.0 physical layer directly?
No-it supports LIN 2.0 protocol stack via USART with software-based bit timing and checksum handling, but requires an external LIN transceiver (e.g., TLE7259-3GE) for ISO 17987-4 compliant physical layer signaling and bus protection.
What is the maximum operating frequency of the 12-bit DAC output?
The DAC supports continuous output at up to 1 MHz update rate when driven by TIM2 trigger; DC accuracy is ±1 LSB INL/DNL over temperature, with output buffer capable of driving 500 Ω loads without external op-amp.
Can the internal 38 kHz RC oscillator be used as RTC clock source?
No-the 38 kHz RC is designated for low-power run/wait modes only. The RTC must use either the 32 kHz LSE crystal oscillator or the 32 kHz LSI RC oscillator; LSE provides 0.95 ppm resolution and is required for precision calendar operation.
STM8AL3L68TAY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- 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:
- 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:
STM8AL3L68TAY FAQ
1.How can I place an order for STM8AL3L68TAY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3L68TAY 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 STM8AL3L68TAY reliable?
The price and inventory of STM8AL3L68TAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3L68TAY is usually 5 days.
3.What payment methods are accepted for STM8AL3L68TAY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3L68TAY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3L68TAY?
STM8AL3L68TAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3L68TAY 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 STM8AL3L68TAY?
For technical support, including STM8AL3L68TAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3L68TAY requirements.
6.How does Aetrix verify that STM8AL3L68TAY is sourced from the original manufacturer or authorized distributors?
All STM8AL3L68TAY 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 STM8AL3L68TAY meets industry standards.
7.What is the process for return or replacement of STM8AL3L68TAY?
All STM8AL3L68TAY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3L68TAY, 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 STM8AL3L68TAY part is unused and in its original packaging.
Return procedure for STM8AL3L68TAY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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