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STMicroelectronics STM8AL3LE8ATCY
- Part No.:
- STM8AL3LE8ATCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
STM8AL3LE8ATCY.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,465
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Product details
Overview
STM8AL3LE8ATCY 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, 12-bit ADC (1 Msps, 28 channels), dual 12-bit DACs, LCD controller (8×40/4×44), AES hardware accelerator, and 2 ultra-low-power comparators. It operates from 1.65 V to 3.6 V across –40 °C to 125 °C and targets body control modules requiring secure, low-power timing and analog sensing.
For engineers reviewing the STM8AL3LE8ATCY datasheet, STM8AL3LE8ATCY pinout, STM8AL3LE8ATCY application, or STM8AL3LE8ATCY equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, active-halt mode current of 1.4 µA with full RTC, 40 interrupt sources, SWIM-based non-intrusive debugging, and LCD driver integration for instrument cluster interfaces.
Technical Context
The STM8AL3LE8ATCY 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.
Power management includes five low-power modes: Wait (200 µA/MHz + 330 µA), Low-power Run (5.9 µA), Low-power Wait (3 µA), Active-Halt (1.4 µA with RTC), and Halt (400 nA), with 4.7 µs wake-up from Halt and per-I/O leakage as low as 50 nA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Harvard, 3-stage pipeline STM8 8-bit CPU, 16 MIPS peak @ 16 MHz |
| Flash / EEPROM | 64 KB Flash with RWW and 2 KB data EEPROM with ECC for robust firmware and parameter storage |
| ADC / DAC | 12-bit ADC up to 1 Msps, 28 channels including temp sensor; dual 12-bit DACs with output buffers |
| RTC Accuracy | ±0.5 ppm BCD calendar with digital calibration - enables precise timekeeping without external compensation |
| Low-Power Halt Current | 400 nA @ VDD = 1.65–3.6 V - supports multi-year battery operation in always-on vehicle subsystems |
| LCD Driver | Supports 8×40 or 4×44 segments with integrated step-up converter - eliminates external bias supply in dashboard displays |
| AES Accelerator | Hardware AES-128 engine with DMA support - enables secure boot and OTA firmware updates without CPU overhead |
Pinout & Package
LQFP80 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant, with 67 I/Os - all mappable to interrupt vectors and supporting LCD segment/common outputs on dedicated pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDDA for analog peripherals (ADC/DAC/comp), VDD for digital core and I/Os |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7, PF0–PF7, PG0–PG7, PH0–PH7 | General-purpose I/Os | 67 total GPIOs; all support external interrupts, most configurable as LCD segment/common drivers |
| OSC_IN / OSC_OUT | HSE crystal oscillator interface | Supports 1–16 MHz external crystal for high-accuracy system clock or RTC reference |
| LSE_IN / LSE_OUT | LSE crystal oscillator interface | 32.768 kHz crystal input for RTC with ±0.5 ppm calibration - critical for automotive timekeeping compliance |
| SWIM | Single-wire interface module | Non-intrusive debugging and programming via single pin - reduces debug footprint vs JTAG/SWD |
| NRST | Active-low reset input | Combines external reset, BOR with 5 programmable thresholds, and PVD monitoring |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive ambient temperatures up to +125 °C - suitable for under-hood and cabin control units |
| Ultra-low-power RTC with tamper detection | Active-halt mode consumes only 1.4 µA while maintaining calendar, alarm, and anti-tamper logic - meets ISO 16750-2 requirements |
| Dual 12-bit DACs with buffer | Independent output buffers enable direct drive of analog sensors or actuators without external op-amps |
| Hardware AES-128 accelerator | Offloads encryption/decryption from CPU, enabling secure CAN/LIN message signing at runtime |
| 28-channel 12-bit ADC with internal reference | Includes calibrated internal VREF+ (1.22 V) and temperature sensor - eliminates need for external references in thermal monitoring |
| Flexible memory protection | Read/write protection zones for Flash and EEPROM - enforces secure bootloader partitioning and firmware integrity |
Applications
| Instrument Cluster Display | Body Control Module (BCM) |
|---|---|
Use Scenario: Driving digital gauge rendering with segmented LCD and real-time vehicle status updates. IC Role / Device Role / Timing Role: Primary MCU managing LCD segment driving, RTC-synchronized odometer logging, and LIN bus communication with door modules. Use Value: Integrated LCD controller with step-up converter reduces BOM count by 3 components; 1.4 µA active-halt enables persistent timekeeping during ignition-off. |
Use Scenario: Centralized control of lighting, wipers, windows, and door locks in passenger vehicles. IC Role / Device Role / Timing Role: Main controller executing LIN slave protocols, PWM dimming for interior LEDs, and ADC-based ambient light sensing. Use Value: Dual 12-bit DACs provide precise analog dimming control; 28-channel ADC supports simultaneous sensor fusion (temp, voltage, light). |
| Smart Rearview Mirror | Automotive HVAC Controller |
Use Scenario: Adaptive mirror display with glare sensing, compass, and outside temperature overlay. IC Role / Device Role / Timing Role: Sensor hub aggregating I²C ambient light/compass data, ADC-based thermistor readings, and SPI-connected display driver. Use Value: Ultra-low leakage I/Os (50 nA) prevent parasitic drain on backup battery; AES engine secures OTA configuration updates. |
Use Scenario: Climate control panel with rotary encoder input, fan speed PWM, and cabin temperature feedback. IC Role / Device Role / Timing Role: Real-time motor control via advanced timer (TIM1) for brushless blower fan, plus touch-key scanning using capacitive sensing on GPIOs. Use Value: 16-bit advanced control timer supports 3-phase commutation; 40 interrupt sources enable responsive UI event handling without polling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AL3L8ATCY | Same family but 32 KB Flash, no AES accelerator, no LCD controller | Suitable for cost-sensitive BCM nodes without display or cryptographic needs | Select when AES and LCD are unused - reduces code size and BOM cost without sacrificing low-power modes or AEC-Q100 Grade 1 |
| RL78/F13-GB | Renesas RL78 core, 32 KB Flash, 1.8–5.5 V operation, no built-in LCD driver | Targets broader industrial temperature range (–40 to +105 °C), not AEC-Q100 qualified | Choose for non-automotive applications needing higher VDD tolerance and lower EMI sensitivity, but requires external LCD bias |
Compared with STM8AL3L8ATCY, the STM8AL3LE8ATCY adds AES and LCD support at identical power profiles; versus RL78/F13-GB, it delivers AEC-Q100 compliance and integrated display driving - critical for Tier-1 automotive display subsystems.
Availability
STM8AL3LE8ATCY is available at Aetrix Electronics and suitable for automotive body electronics, instrument cluster interfaces, and smart mirror systems requiring stable component supply across extended temperature and long lifecycle commitments.
Supply support for STM8AL3LE8ATCY 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 ICs, sensors, and automotive-grade silicon.
The STM8AL ultra-low-power 8-bit MCU family targets automotive body electronics where AEC-Q100 reliability, sub-µA sleep currents, and integrated analog peripherals reduce system complexity and cost.
FAQ
What is the maximum operating temperature for STM8AL3LE8ATCY?
The STM8AL3LE8ATCY is AEC-Q100 Grade 1 qualified with guaranteed operation from –40 °C to +125 °C ambient temperature. This rating is validated per stress test conditions defined in the AEC-Q100 standard and applies to all electrical specifications in the datasheet's "Operating Conditions" section (DocID027180 Rev 5, Table 19).
Does STM8AL3LE8ATCY support in-circuit debugging without halting CPU execution?
Yes - the device uses SWIM (Single-Wire Interface Module), enabling non-intrusive debugging and programming via a single pin. SWIM allows real-time variable inspection, breakpoint setting, and flash reprogramming without disrupting peripheral operation or requiring dedicated debug pins like JTAG or SWD.
How many LCD segments can STM8AL3LE8ATCY drive, and what voltage support does it provide?
The STM8AL3LE8ATCY supports up to 8×40 or 4×44 LCD segments with integrated step-up converter, generating up to 5.5 V from a 3.3 V supply. This eliminates external charge pumps or boost converters and supports common passive matrix LCDs used in automotive instrument clusters.
Is the AES hardware accelerator accessible via DMA, and what cipher modes does it support?
Yes - the AES-128 engine supports ECB, CBC, CTR, and GCM modes and is fully DMA-capable via the 4-channel DMA controller. This enables zero-CPU-overhead encryption of CAN/LIN messages or firmware blocks, with throughput limited only by bus bandwidth and key setup latency.
STM8AL3LE8ATCY 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AL3LE8ATCY FAQ
1.How can I place an order for STM8AL3LE8ATCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3LE8ATCY 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 STM8AL3LE8ATCY reliable?
The price and inventory of STM8AL3LE8ATCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3LE8ATCY is usually 5 days.
3.What payment methods are accepted for STM8AL3LE8ATCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3LE8ATCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3LE8ATCY?
STM8AL3LE8ATCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3LE8ATCY 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 STM8AL3LE8ATCY?
For technical support, including STM8AL3LE8ATCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3LE8ATCY requirements.
6.How does Aetrix verify that STM8AL3LE8ATCY is sourced from the original manufacturer or authorized distributors?
All STM8AL3LE8ATCY 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 STM8AL3LE8ATCY meets industry standards.
7.What is the process for return or replacement of STM8AL3LE8ATCY?
All STM8AL3LE8ATCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3LE8ATCY, 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 STM8AL3LE8ATCY part is unused and in its original packaging.
Return procedure for STM8AL3LE8ATCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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