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STMicroelectronics STM8AL3146TCY
- Part No.:
- STM8AL3146TCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AL3146TCY.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,283
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Product details
Overview
STM8AL3146TCY from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit ultra-low-power MCU featuring 16 MHz STM8 core, 32 Kbyte Flash, 1 Kbyte data EEPROM, 2 Kbyte RAM, RTC with BCD calendar and alarm, 12-bit ADC (25 channels, up to 1 Mbps), 12-bit DAC with output buffer, two ultra-low-power comparators, LCD controller (4×28 segments), and multiple communication interfaces including USART, I²C, and SPI. It targets battery-powered automotive body electronics such as smart sensors and dashboard modules.
For engineers reviewing the STM8AL3146TCY datasheet, STM8AL3146TCY pinout, STM8AL3146TCY application, or STM8AL3146TCY equivalent, key selection criteria include ultra-low-power operation down to 400 nA in Halt mode with PDR, AEC-Q100 qualification for -40 °C to 125 °C operation, integrated LCD driver capability, and SWIM-based non-intrusive debugging support.
Technical Context
The STM8AL3146TCY implements a Harvard-architecture 3-stage pipeline STM8 core delivering 16 CISC MIPS at 16 MHz, with up to 40 external interrupt sources and fast 4.7 µs wakeup from Halt mode. 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 with clock security system.
Power management includes five configurable low-power modes: Wait (typ. 5.1 µA), low-power Wait (3 µA), active-halt with full RTC (1.3 µA), and Halt with PDR (400 nA). The RTC supports auto-wakeup with 0.95 ppm resolution and periodic interrupts, while the LCD controller includes built-in step-up converter for direct segment driving.
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 functions. |
| Max Clock Frequency | 16 MHz; delivers 16 CISC MIPS peak performance suitable for real-time sensor fusion and control loops. |
| Flash Memory | 32 Kbyte; retains data for 20 years at 55 °C, supporting long-life automotive ECU firmware storage. |
| Data EEPROM | 1 Kbyte true EEPROM; rated for 300 kwrite cycles, enabling robust parameter logging and calibration storage. |
| Low-Power Halt Current | 400 nA with PDR enabled; allows multi-year battery operation in always-on vehicle monitoring nodes. |
| ADC Resolution & Speed | 12-bit, up to 1 Mbps sampling; supports high-fidelity analog sensing (e.g., temperature, pressure) with internal reference and temp sensor. |
| DAC Output | 12-bit with output buffer on PB4–PB6; provides precise analog actuator control without external op-amps. |
| Operating Temperature | -40 °C to 125 °C; meets AEC-Q100 Grade 0 requirements for under-hood and cabin-mounted automotive applications. |
Pinout & Package
LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, ECOPACK®2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Supports 1.65–3.6 V operation; enables direct connection to automotive 3.3 V or 2.5 V domains with low dropout tolerance. |
| NRST | Active-low reset input | Accepts standard open-drain or push-pull reset signals; integrates ultra-low-power POR/PDR and programmable voltage detector (PVD). |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/Os | Up to 41 mappable I/Os with interrupt capability; PA0 supports high-sink LED driver (20 mA), enabling direct indicator control. |
| OSC_IN / OSC_OUT | HSE crystal oscillator interface | Drives 1–16 MHz external crystal; used for precise timing in LIN/USART or RTC synchronization. |
| LSE_IN / LSE_OUT | LSE crystal oscillator interface | Connects 32.768 kHz crystal for RTC calendar and ultra-low-power wake-up events. |
| SWIM | Single-wire interface for debug | Enables non-intrusive on-chip programming and real-time debugging without halting CPU operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for -40 °C to +125 °C operation with extended reliability testing, ensuring suitability for engine bay and transmission control units. |
| Ultra-low leakage per I/O | 50 nA typical; minimizes standby current in systems with dozens of unconnected or floating pins. |
| Integrated LCD controller | Drives up to 4×28 segments with internal step-up converter; eliminates need for external bias supply in instrument cluster displays. |
| Dual watchdog timers | Independent + window watchdog; provides layered fault detection for ASIL-B compliant safety mechanisms. |
| True data EEPROM | 1 Kbyte with 300 kcycle endurance; stores critical calibration data, odometer values, or configuration parameters across power cycles. |
Applications
| Automotive Door Module | Smart Battery Sensor |
|---|---|
Use Scenario: Centralized control of window lift, mirror adjustment, and interior lighting in modern door ECUs. IC Role / Device Role / Timing Role: Primary MCU managing PWM motor drivers, LIN communication to body controller, and real-time fault monitoring. Use Value: Ultra-low-power Halt mode (400 nA) extends sleep current budget; integrated comparators detect glass pinch events without external circuitry. |
Use Scenario: Monitoring voltage, current, temperature, and state-of-charge in 12 V lead-acid or LiFePO₄ starter batteries. IC Role / Device Role / Timing Role: Analog front-end processor with 12-bit ADC, temp sensor, and DAC for closed-loop charge control feedback. Use Value: On-chip 12-bit ADC (1 Mbps) captures transient load dumps; RTC with alarm enables scheduled self-test and SOC reporting. |
| Dashboard Indicator Panel | Seat Position Controller |
Use Scenario: Driving segmented LCD displays for fuel level, oil pressure, and warning icons in analog-style instrument clusters. IC Role / Device Role / Timing Role: LCD controller with integrated step-up converter and segment multiplexing logic. Use Value: Direct 4×28 segment drive eliminates external LCD bias IC; low-power run mode (5.1 µA/MHz) sustains display during ignition-off monitoring. |
Use Scenario: Motorized seat position memory and adjustment using potentiometer feedback and DC motor control. IC Role / Device Role / Timing Role: Real-time position tracking via ADC, PWM generation for motor drive, and EEPROM storage of user presets. Use Value: 16-bit advanced control timer (TIM1) generates synchronized 3-phase PWM for BLDC seat motors; 1 Kbyte EEPROM stores up to 4 user profiles. |
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 |
|---|---|---|---|
| STM8AL3L46TCY | Includes integrated LCD controller (4×28); same Flash/RAM but adds step-up converter and LCD bias generation. | Required for applications needing direct LCD segment driving; not suitable if LCD is absent or externally driven. | Select when LCD interface is mandatory; otherwise STM8AL3146TCY offers lower cost and identical core/peripheral set without LCD overhead. |
| RL78/F13 | Renesas RL78 core (16-bit), 32 Kbyte Flash, 2 Kbyte RAM, but higher active current (120 µA/MHz vs. 90 µA/MHz in RAM run) and no AEC-Q100 Grade 0 rating. | Targeted at industrial and consumer applications; lacks automotive temperature grade and some low-power modes (e.g., 400 nA Halt). | Choose only if 16-bit architecture or Renesas ecosystem integration outweighs automotive qualification and ultra-low-power requirements. |
Compared with STM8AL3L46TCY, STM8AL3146TCY removes LCD hardware to reduce cost and power in non-display applications; versus RL78/F13, it delivers superior automotive qualification, deeper low-power states, and lower active-mode current for battery-sensitive designs.
Availability
STM8AL3146TCY is available at Aetrix Electronics and suitable for automotive body electronics, smart sensor nodes, and dashboard indicator systems requiring stable component supply across extended product lifecycles.
Supply support for STM8AL3146TCY 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-operated and energy-constrained automotive subsystems requiring AEC-Q100 compliance and sub-microamp standby operation.
FAQ
What is the maximum operating temperature range for STM8AL3146TCY?
The STM8AL3146TCY is qualified per AEC-Q100 Grade 0 and operates from -40 °C to +125 °C. This rating is validated across all electrical parameters in the datasheet, including Flash retention, ADC accuracy, and RTC stability, making it suitable for under-hood and transmission control applications where ambient temperatures exceed 105 °C.
Does STM8AL3146TCY support LIN 2.0 communication?
Yes - the integrated USART peripheral supports LIN 2.0 protocol via hardware LIN break detection, sync field handling, and checksum generation. It operates at standard LIN baud rates (e.g., 19.2 kbps) and is compatible with ISO 17987-4 physical layer transceivers when paired with external driver ICs like TLE7259-3GE.
Can the 12-bit DAC output drive external loads directly?
The 12-bit DAC features an integrated output buffer on pins PB4–PB6, capable of sourcing/sinking ±2 mA at VDD = 3.3 V. It can directly drive low-impedance loads such as LED bias circuits or op-amp inputs but requires external amplification for >5 mA loads or precision voltage references.
Is SWIM debugging supported in all low-power modes?
SWIM debugging remains active in Run, Wait, and Low-power Run modes. It is disabled in Low-power Wait, Active-halt, and Halt modes to preserve ultra-low current consumption; however, the device can be woken by NRST or configured interrupts and re-enter debug mode upon resuming Run mode.
STM8AL3146TCY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-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:
- 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:
STM8AL3146TCY FAQ
1.How can I place an order for STM8AL3146TCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3146TCY 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 STM8AL3146TCY reliable?
The price and inventory of STM8AL3146TCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3146TCY is usually 5 days.
3.What payment methods are accepted for STM8AL3146TCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3146TCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3146TCY?
STM8AL3146TCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3146TCY 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 STM8AL3146TCY?
For technical support, including STM8AL3146TCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3146TCY requirements.
6.How does Aetrix verify that STM8AL3146TCY is sourced from the original manufacturer or authorized distributors?
All STM8AL3146TCY 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 STM8AL3146TCY meets industry standards.
7.What is the process for return or replacement of STM8AL3146TCY?
All STM8AL3146TCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3146TCY, 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 STM8AL3146TCY part is unused and in its original packaging.
Return procedure for STM8AL3146TCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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