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STMicroelectronics STM8AL3L46TAY
- Part No.:
- STM8AL3L46TAY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AL3L46TAY.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,775
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Product details
Overview
STM8AL3L46TAY from STMicroelectronics is an AEC-Q100 qualified automotive-grade 8-bit ultra-low-power MCU featuring 32 Kbyte Flash, 1 Kbyte data EEPROM, 2 Kbyte RAM, integrated LCD controller (4×28 segments), 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 multiple timers including an advanced control timer for motor control. It operates from 1.65 V to 3.6 V across –40 °C to 125 °C and targets instrument cluster and body control modules.
For engineers reviewing the STM8AL3L46TAY datasheet, STM8AL3L46TAY pinout, STM8AL3L46TAY application, or STM8AL3L46TAY equivalent, key selection criteria include AEC-Q100 qualification, sub-μA low-power modes (down to 400 nA in Halt with PDR), LCD drive capability, automotive temperature range, and SWIM-based non-intrusive debugging support.
Technical Context
The STM8AL3L46TAY 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, programmable voltage detector (PVD), and ultra-safe BOR with five selectable thresholds. The RTC operates independently in active-halt mode (1.3 μA) with 0.95 ppm resolution and periodic wakeup capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard core with 3-stage pipeline; enables deterministic timing and efficient code density for safety-critical automotive firmware. |
| Max Clock Frequency | 16 MHz; supports real-time control loops in motor drivers and sensor interfaces without external PLL. |
| Flash Memory | 32 Kbyte Flash with 20-year data retention at 55 °C; sufficient for complex automotive firmware with OTA update partitioning. |
| Data EEPROM | 1 Kbyte true data EEPROM with 300 kcycle endurance; enables robust parameter storage for calibration and configuration without external memory. |
| Low-Power Halt Current | 400 nA with PDR enabled; allows battery-backed operation in always-on vehicle subsystems for >10-year shelf life. |
| LCD Drive Capability | Up to 4×28 segments with integrated step-up converter; eliminates need for external LCD bias supply in dashboard displays. |
| ADC Resolution & Speed | 12-bit ADC, 25 channels, up to 1 Mbps sampling; supports high-fidelity sensor acquisition (e.g., cabin temp, pressure, position). |
| Operating Temperature | –40 °C to +125 °C; meets under-hood and instrument panel thermal requirements per AEC-Q100 Grade 1. |
Pinout & Package
LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, ECOPACK2 qualified. Pin count and I/O mapping optimized for space-constrained automotive modules requiring LCD interface and analog sensing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains support independent analog/digital regulation; VDDA pin ensures clean ADC/DAC reference. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/Os | 41 total I/Os, all mappable to interrupt vectors; PA0 supports high-sink LED driver capability (20 mA). |
| OSC_IN/OSC_OUT | HSE crystal oscillator interface | Supports 1–16 MHz external crystal; essential for precise LIN/UART timing and RTC accuracy. |
| LSI/LSE_IN/LSE_OUT | Low-speed oscillator terminals | LSE drives RTC independently; LSI provides fallback clock during crystal failure for fail-safe operation. |
| SWIM | Single-wire interface for debug | Enables non-intrusive on-chip programming and real-time debugging without halting CPU execution. |
| VLCD | LCD step-up converter output | Generates regulated bias voltage (up to 5.5 V) directly from VDD; eliminates external charge pump in display designs. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power RTC with auto-wakeup | 1.3 μA active-halt current with 0.95 ppm resolution enables precise timekeeping and scheduled wakeups for periodic CAN bus polling. |
| Integrated LCD controller | 4×28 segment drive with internal step-up converter reduces BOM count by eliminating external LCD bias IC and associated passives. |
| Dual ultra-low-power comparators | One rail-to-rail comparator with wakeup capability and one with fixed threshold enable battery monitoring and windowed sensor alerts. |
| 12-bit DAC with output buffer | Buffered output drives analog actuators (e.g., valve positioners) directly without external op-amp, reducing latency and component count. |
| Advanced control timer (TIM1) | Three-channel 16-bit timer with dead-time insertion and complementary outputs supports 3-phase motor control in HVAC blowers and seat adjusters. |
| AEC-Q100 Grade 1 qualification | Validated for –40 °C to +125 °C operation with full automotive stress testing; qualifies for use in engine bay and instrument cluster applications. |
Applications
| Instrument Cluster Display | Body Control Module (BCM) |
|---|---|
Use Scenario: Driving digital gauges, warning indicators, and multi-segment LCD readouts in automotive dashboards. IC Role / Device Role / Timing Role: Primary MCU managing LCD segment driving, CAN message parsing, and real-time gauge updates. Use Value: Integrated LCD controller and 4×28 segment support eliminate external bias IC; ultra-low-power RTC maintains clock during ignition-off state. |
Use Scenario: Centralized control of door locks, window lifts, mirror adjustment, and interior lighting. IC Role / Device Role / Timing Role: System controller coordinating LIN slave nodes, reading switch inputs, and driving relays/LEDs. Use Value: 41 GPIOs with interrupt mapping simplify wiring harness integration; 12-bit ADC monitors battery voltage and ambient light for adaptive dimming. |
| Climate Control Panel | Seat Position Memory System |
Use Scenario: User interface for HVAC settings with tactile buttons, rotary encoders, and segmented display. IC Role / Device Role / Timing Role: Front-end processor handling button debouncing, encoder quadrature decoding, and display refresh. Use Value: Quadrature encoder input on general-purpose timers enables precise knob control; low-power wait mode (3 μA) extends battery backup runtime. |
Use Scenario: Storing and recalling driver seat, mirror, and steering column positions via non-volatile memory. IC Role / Device Role / Timing Role: Dedicated memory manager using data EEPROM for 300 kcycle wear-leveling of position profiles. Use Value: 1 Kbyte true data EEPROM retains seat presets for >10 years at 55 °C; SWIM debug interface enables field firmware updates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AL3L66TAY | Same core and peripherals, but 64 Kbyte Flash and 2 Kbyte EEPROM; identical LQFP32 package and pinout. | Required when firmware size exceeds 32 Kbyte or EEPROM logging depth exceeds 1 Kbyte. | Select if future firmware growth or extended data logging is anticipated; pin-compatible upgrade path. |
| RL78/F13-GB | Renesas RL78 core (16-bit), 32 Kbyte Flash, 2 Kbyte RAM, no integrated LCD controller; operates down to 1.6 V. | Suitable for non-LCD applications where 16-bit processing headroom or lower VDD min is critical. | Choose when migrating from 8-bit to 16-bit architecture or when LCD functionality is handled externally. |
Compared with STM8AL3L46TAY, STM8AL3L66TAY offers scalable Flash/EEPROM without hardware redesign, while RL78/F13-GB trades LCD integration for higher computational throughput and broader voltage tolerance-making each optimal for distinct automotive subsystem priorities.
Availability
STM8AL3L46TAY is available at Aetrix Electronics and suitable for instrument cluster displays, body control modules, climate control panels, and seat position memory systems requiring stable component supply across automotive production lifecycles.
Supply support for STM8AL3L46TAY 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 specializing in automotive, industrial, and power management solutions, with broad IP portfolios in microcontrollers, analog, and MEMS technologies.
The STM8AL3Lxx product line delivers ultra-low-power 8-bit MCUs specifically engineered for AEC-Q100-compliant automotive body electronics, instrument clusters, and sensor nodes where extended battery life and high reliability are mandatory.
FAQ
Is STM8AL3L46TAY qualified for automotive applications?
Yes, STM8AL3L46TAY is fully AEC-Q100 qualified (Grade 1, –40 °C to +125 °C) and designed for automotive body electronics. It undergoes rigorous stress testing including HTOL, TC, and ESD per AEC standards, and features embedded safety mechanisms like clock security system and BOR with five thresholds.
What LCD configurations does STM8AL3L46TAY support?
STM8AL3L46TAY supports up to 4 commons × 28 segments with integrated step-up converter (VLCD output). It drives static, multiplexed, and biased LCDs directly without external components, and includes software-configurable contrast control and blinking modes per segment group.
How does the low-power RTC operate in Halt mode?
In active-halt mode, the RTC runs from the 32 kHz LSE oscillator consuming only 1.3 μA. It maintains BCD calendar, generates alarm interrupts, and supports auto-wakeup at programmable intervals (down to 125 ms) with 0.95 ppm resolution-enabling precise sleep/wake scheduling for CAN bus polling or sensor sampling.
Can STM8AL3L46TAY be programmed in-system without removing it from the board?
Yes, STM8AL3L46TAY supports single-wire interface for microcontroller (SWIM), enabling fast on-chip programming and non-intrusive debugging. SWIM requires only one dedicated pin (SWIM) and ground, allowing firmware updates and real-time variable inspection without halting CPU execution or removing the device from the PCB.
STM8AL3L46TAY 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:
- 29
- 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 21x12b; D/A 1x12b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AL3L46TAY FAQ
1.How can I place an order for STM8AL3L46TAY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3L46TAY 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 STM8AL3L46TAY reliable?
The price and inventory of STM8AL3L46TAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3L46TAY is usually 5 days.
3.What payment methods are accepted for STM8AL3L46TAY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3L46TAY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3L46TAY?
STM8AL3L46TAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3L46TAY 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 STM8AL3L46TAY?
For technical support, including STM8AL3L46TAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3L46TAY requirements.
6.How does Aetrix verify that STM8AL3L46TAY is sourced from the original manufacturer or authorized distributors?
All STM8AL3L46TAY 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 STM8AL3L46TAY meets industry standards.
7.What is the process for return or replacement of STM8AL3L46TAY?
All STM8AL3L46TAY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3L46TAY, 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 STM8AL3L46TAY part is unused and in its original packaging.
Return procedure for STM8AL3L46TAY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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