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STMicroelectronics STM8AL3LE8ATAY

Name: STM8AL3LE8ATAY
Brand: STMicroelectronics
SKU: STM8AL3LE8ATAY
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM8AL3LE8ATAY

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 80-LQFP

Datasheet:: STM8AL3LE8ATAY.pdf

Description:: IC MCU 8BIT 64KB FLASH 80LQFP

Quantity:: RFQ Add To RFQ list

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Inventory:2,620

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Product details

Overview

STM8AL3LE8ATAY from STMicroelectronics is an AEC-Q100 Grade 1 qualified automotive 8-bit ultra-low-power MCU featuring 64 KB Flash, 2 KB data EEPROM with ECC, RTC with ±0.5 ppm digital calibration, LCD controller (8×40/4×44), dual 12-bit DACs, 12-bit ADC (1 Msps, 28 channels), two ultra-low-power comparators, and AES hardware accelerator. It operates from 1.8–3.6 V (down to 1.65 V in power-down) across –40 to 125 °C and targets instrument cluster and body control modules requiring high reliability and sub-µA sleep current.

For engineers reviewing the STM8AL3LE8ATAY datasheet, STM8AL3LE8ATAY pinout, STM8AL3LE8ATAY application, or STM8AL3LE8ATAY equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, active-halt RTC consumption (1.4 µA), LCD drive capability, dual DAC output buffering, and SWIM-based non-intrusive debugging support for automotive ECU development.

Technical Context

The STM8AL3LE8ATAY implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates three oscillators: 32 kHz LSE, 1–16 MHz HSE, and factory-trimmed 16 MHz HSI with 38 kHz LSI - all supported by clock security system and programmable voltage detector.

Low-power operation is enabled by five distinct modes: Wait (200 µA/MHz + 330 µA), Low-power Run (5.9 µA), Low-power Wait (3 µA), Active-Halt with full RTC (1.4 µA), and Halt (400 nA), with 4.7 µs wake-up from Halt. I/O leakage is specified at ≤50 nA per pin.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	STM8 8-bit Harvard, 3-stage pipeline, 16 MIPS @ 16 MHz - enables deterministic real-time control in resource-constrained automotive nodes.
Memory	64 KB Flash + 2 KB data EEPROM with ECC and RWW - supports safe over-the-air firmware updates and parameter retention without external NV memory.
RTC Accuracy	±0.5 ppm with digital calibration - eliminates need for external temperature compensation in calendar-critical applications like service interval tracking.
Low-Power Halt Current	400 nA @ VDD = 1.65–3.6 V - enables multi-year battery operation in always-on vehicle monitoring functions.
LCD Driver	8×40 or 4×44 segment drive with integrated step-up converter - drives monochrome automotive displays without external boost IC.
DAC Resolution & Output	Dual 12-bit DACs with output buffers on PB4/PB5/PB6 - provides rail-to-rail analog outputs for sensor biasing or actuator reference generation.
ADC Performance	12-bit, 1 Msps, 28-channel with internal temp sensor and VREF - enables simultaneous sampling of multiple vehicle sensors (e.g., cabin temp, battery voltage, pedal position).

Pinout & Package

LQFP80 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant, with 67 I/Os - all mappable to interrupt vectors and supporting flexible PCB layout for automotive harness routing.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Power supply and ground	Dual VDD/VSS pairs ensure low-noise analog/digital separation; supports independent decoupling for RTC/LCD domains.
PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7, PF0–PF7, PG0–PG7, PH0–PH7	General-purpose I/O	67 total I/Os with interrupt capability; configurable pull-up/down, alternate functions including USART/I2C/SPI timers - enables direct connection to switches, LEDs, LIN transceivers.
OSC_IN / OSC_OUT	HSE crystal interface	Supports 1–16 MHz external crystal for precise timing; paired with clock security system for fail-safe oscillator monitoring.
LSE_IN / LSE_OUT	LCD/RTC crystal interface	32.768 kHz crystal input for RTC calendar and LCD frame timing - enables accurate timekeeping during deep sleep.
SWIM	Single-wire interface module	Non-intrusive debug and programming via single pin - allows in-system firmware update without halting real-time operation.
NRST	Active-low reset	Includes ultra-low-power POR/PDR and programmable BOR with 5 thresholds - ensures robust reset under battery voltage sag in automotive environments.

Key Features

Feature	Design Value
AEC-Q100 Grade 1 qualification	Validated for operation from –40 to 125 °C with full automotive stress testing - meets OEM requirements for under-hood and dashboard ECUs.
Ultra-low-power RTC with anti-tamper	Digital calibration ±0.5 ppm + tamper detection via VDD/VSS monitoring - secures odometer and service log integrity against voltage glitch attacks.
Hardware AES accelerator	128-bit AES encryption/decryption engine with DMA support - enables secure bootloader authentication and encrypted CAN message payload handling.
Dual 12-bit DAC with buffer	Simultaneous buffered outputs on PB4/PB5/PB6 - drives precision references for op-amp circuits or analog sensor excitation without external op-amps.
Three USARTs with IrDA/LIN support	Full LIN 1.3 and LIN 2.0 compliance + IrDA physical layer - supports direct connection to door modules, seat controllers, and climate actuators.

Applications

Instrument Cluster Display

Body Control Module (BCM)

Use Scenario: Driving digital speedometer, fuel gauge, and warning icons on segmented LCD panel in passenger vehicle dash.

IC Role / Device Role / Timing Role: Primary MCU managing LCD segment drive, real-time speed calculation, CAN message parsing, and backlight PWM control.

Use Value: Integrated LCD controller with step-up converter eliminates external boost IC; 1.4 µA active-halt mode preserves RTC while minimizing battery drain during ignition-off periods.

Use Scenario: Centralized control of door locks, window lifters, interior lighting, and mirror adjustment in mid-tier vehicles.

IC Role / Device Role / Timing Role: Main controller interfacing with LIN slave nodes, reading switch inputs, driving relays/LEDs, and logging fault codes to EEPROM.

Use Value: 67 GPIOs enable direct connection to >30 discrete inputs/outputs; AEC-Q100 Grade 1 ensures reliability across thermal cycling and vibration profiles.

Smart Rearview Mirror

Occupancy Detection System

Use Scenario: Auto-dimming mirror with ambient light sensing, glare detection, and display overlay for blind-spot alerts.

IC Role / Device Role / Timing Role: Sensor fusion hub aggregating photodiode ADC readings, processing glare algorithm, and driving OLED/LCD overlay via SPI.

Use Value: Dual 12-bit DACs generate precise reference voltages for analog front-end conditioning; 28-channel ADC supports simultaneous multi-sensor acquisition.

Use Scenario: Seat-mounted capacitive sensing for driver presence and passenger classification in airbag deployment logic.

IC Role / Device Role / Timing Role: Capacitance-to-digital converter host using comparator inputs and timer-based charge-transfer measurement.

Use Value: Two ultra-low-power comparators with rail-to-rail input and wakeup capability enable continuous low-power occupancy monitoring without CPU intervention.

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM8AL3L8ATAY	Same package and pinout, but lacks LCD controller and AES accelerator; 32 KB Flash, 1 KB EEPROM.	Suitable for non-display BCM or gateway nodes where cryptographic security is not required.	Select when display or secure boot functionality is unnecessary - reduces cost and code footprint.
RL78/F13-GB	Renesas RL78 core, 24 MHz max, 64 KB Flash, 4 KB RAM, no integrated LCD driver or AES; supports IEC 61508 SIL2.	Targeted at functional safety-critical subsystems (e.g., wiper control) requiring ASIL-B compliance.	Choose when ISO 26262 ASIL-B certification is mandatory and LCD/AES features are secondary.

Compared with STM8AL3LE8ATAY, STM8AL3L8ATAY trades LCD and AES for lower cost and reduced memory, while RL78/F13-GB offers higher safety certification at the expense of missing automotive-optimized peripherals like calibrated RTC and ultra-low-power comparators.

Availability

STM8AL3LE8ATAY is available at Aetrix Electronics and suitable for instrument cluster displays, body control modules, smart rearview mirrors, and occupancy detection systems requiring stable component supply across extended automotive product lifecycles.

Supply support for STM8AL3LE8ATAY 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 since 1987.

The STM8AL ultra-low-power 8-bit MCU family targets cost-sensitive, thermally constrained automotive applications - especially body electronics and instrumentation - where AEC-Q100 qualification, sub-µA sleep current, and integrated LCD/AES are critical design requirements.

FAQ

What is the maximum operating temperature range for STM8AL3LE8ATAY?

The STM8AL3LE8ATAY is AEC-Q100 Grade 1 qualified and specified for continuous operation from –40 °C to +125 °C ambient temperature. This rating is validated across all electrical parameters including Flash write/erase endurance, RTC accuracy, and I/O leakage, making it suitable for under-hood and dashboard mounting locations in passenger vehicles.

Does STM8AL3LE8ATAY support in-circuit debugging without halting real-time functions?

Yes. The device uses ST's SWIM (Single-Wire Interface Module) protocol, enabling non-intrusive debugging and programming via a single pin. SWIM allows live register inspection, breakpoint insertion, and flash reprogramming while the application continues executing - essential for validating timing-critical automotive routines like LIN frame transmission or PWM motor control.

How does the LCD controller handle voltage boosting for segment drive?

The integrated LCD controller includes a programmable step-up converter that generates up to 5.5 V from a 1.8–3.6 V supply. It supports both static and multiplexed (up to 1:8 duty) drive schemes, with software-configurable contrast and frame frequency. No external charge pump or boost IC is required, reducing BOM count and board space in automotive display modules.

Can the AES hardware accelerator operate independently of the CPU core?

Yes. The AES engine is accessible via dedicated registers and can be triggered by software or DMA. It supports ECB/CBC/CTR modes for 128-bit keys and operates autonomously once initiated - allowing concurrent encryption of CAN message payloads or secure bootloader verification while the CPU executes application code or remains in low-power mode.

STM8AL3LE8ATAY Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 80-LQFP

Series:: STM8A

Packaging:: Tray

Product Status:: Not For New Designs

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:: 68

Program Memory Size:: 64KB (64K x 8)

Program Memory Type:: FLASH

EEPROM Size:: 2K x 8

RAM Size:: 4K x 8

Voltage - Supply (Vcc/Vdd):: 1.65V ~ 3.6V

Data Converters:: A/D 28x12b; D/A 2x12b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:

STM8AL3LE8ATAY FAQ

1.How can I place an order for STM8AL3LE8ATAY through Aetrix?

Please submit a Request for Quotation (RFQ) for STM8AL3LE8ATAY 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 STM8AL3LE8ATAY reliable?

The price and inventory of STM8AL3LE8ATAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3LE8ATAY is usually 5 days.

3.What payment methods are accepted for STM8AL3LE8ATAY?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3LE8ATAY transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM8AL3LE8ATAY?

STM8AL3LE8ATAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM8AL3LE8ATAY 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 STM8AL3LE8ATAY?

For technical support, including STM8AL3LE8ATAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3LE8ATAY requirements.

6.How does Aetrix verify that STM8AL3LE8ATAY is sourced from the original manufacturer or authorized distributors?

All STM8AL3LE8ATAY 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 STM8AL3LE8ATAY meets industry standards.

7.What is the process for return or replacement of STM8AL3LE8ATAY?

All STM8AL3LE8ATAY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3LE8ATAY, 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 STM8AL3LE8ATAY part is unused and in its original packaging.

Return procedure for STM8AL3LE8ATAY:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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