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STMicroelectronics STM8AL3L8ATCY
- Part No.:
- STM8AL3L8ATCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 80-LQFP
- Datasheet:
-
STM8AL3L8ATCY.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 80LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,594
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Product details
Overview
STM8AL3L8ATCY from STMicroelectronics is an AEC-Q100 Grade 1 qualified automotive 8-bit ultra-low-power microcontroller featuring 64 Kbytes Flash, 4 Kbytes RAM, 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 three USARTs supporting LIN 2.0 and IrDA - deployed in battery-powered instrument clusters and body control modules.
For engineers reviewing the STM8AL3L8ATCY datasheet, STM8AL3L8ATCY pinout, STM8AL3L8ATCY application, or STM8AL3L8ATCY equivalent, key selection criteria include AEC-Q100 Grade 1 qualification, 1.65–3.6 V operation across -40 to 125 °C, sub-µA low-power modes (down to 400 nA Halt), integrated LCD driver with step-up converter, and SWIM-based non-intrusive debugging.
Technical Context
The STM8AL3L8ATCY implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. It integrates a clock security system with dual oscillators (1–16 MHz HSE + 32 kHz LSE), programmable voltage detector, and BOR with five thresholds - all optimized for fail-safe automotive power management.
Its peripheral set centers on ultra-low-power operation: Active-halt mode sustains RTC with 1.4 µA consumption; LCD controller supports bias generation and contrast control; DMA routes data across ADC, DAC, SPI, I²C, USART, and timers without CPU intervention.
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 / RAM | 64 Kbytes Flash with ECC & RWW; 2 Kbytes data EEPROM with ECC; 4 Kbytes RAM |
| Operating Voltage | 1.8 V to 3.6 V (functional down to 1.65 V in power-down) |
| Temperature Range | -40 °C to +125 °C (AEC-Q100 Grade 1 qualified) |
| Low-Power Consumption | Halt: 400 nA; Active-halt w/ RTC: 1.4 µA; Low-power wait: 3 µA |
| ADC / DAC | 12-bit ADC, 1 Msps, 28 channels, internal temp sensor & ref; dual 12-bit DACs with output buffers |
| LCD Driver | Supports 8×40 or 4×44 segments with integrated step-up converter and software contrast control |
Pinout & Package
LQFP80 package (14 × 14 mm, 0.5 mm pitch), thermally enhanced for automotive under-hood environments. Pin count and LCD segment mapping differ between STM8AL3L8x (LCD-enabled) and STM8AL318x (LCD-disabled) variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply / ground | Dual VDD/VSS pairs per side ensure low-noise analog/digital separation and robust EMC performance |
| NRST | Reset input | Active-low reset with internal pull-up; accepts external reset pulse or BOR assertion |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7, PF0–PF7, PG0–PG7, PH0–PH7 | General-purpose I/O | 67 total I/Os, all mappable to interrupt vectors; 50 nA max leakage per I/O in Halt mode |
| OSC_IN / OSC_OUT | HSE crystal interface | Supports 1–16 MHz external crystal; paired with clock security system for fault detection |
| LSE_IN / LSE_OUT | LCD/RTC crystal interface | 32 kHz external crystal input for RTC calendar and LCD timing; enables ±0.5 ppm accuracy |
| SWIM | Single-wire interface module | Non-intrusive debugging and programming via dedicated pin; no debug resource overhead |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power RTC | BCD calendar with alarm, digital calibration (±0.5 ppm), anti-tamper detection, and independent LSE clock source |
| Integrated LCD controller | Drives up to 320 segments (8×40) with internal step-up converter, software contrast control, and static/dynamic bias modes |
| Dual 12-bit DACs | Simultaneous or dual-mode output with rail-to-rail buffered outputs; usable for analog waveform generation or sensor biasing |
| Two ultra-low-power comparators | One with fixed threshold (VREFINT/4), one rail-to-rail; both support wake-up from all low-power modes |
| Flexible low-power modes | Five distinct modes: Wait, Low-power run (5.9 µA), Low-power wait (3 µA), Active-halt (1.4 µA), Halt (400 nA) |
Applications
| Automotive Instrument Cluster | Body Control Module (BCM) |
|---|---|
Use Scenario: Driving analog gauges, LED indicators, and segmented LCD displays in dashboard assemblies. IC Role / Device Role / Timing Role: Primary MCU managing display refresh, CAN/LIN communication, and real-time gauge updates. Use Value: Integrated LCD controller eliminates external bias IC; 125 °C rating ensures reliability behind glass dashboards. |
Use Scenario: Controlling door locks, window lifts, mirror adjustment, and interior lighting via LIN bus. IC Role / Device Role / Timing Role: Central LIN node with UART-based protocol stack and low-power wake-on-event capability. Use Value: Sub-µA Halt mode extends battery life during vehicle sleep; LIN 2.0 compliance ensures interoperability. |
| Smart HVAC Control Unit | Tire Pressure Monitoring System (TPMS) ECU |
Use Scenario: Regulating fan speed, blend door actuation, and cabin temperature feedback loops. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating NTC thermistors, humidity sensors, and PWM fan drivers. Use Value: Dual 12-bit DACs generate precise reference voltages for analog sensor conditioning; 28-channel ADC supports multi-sensor inputs. |
Use Scenario: Battery-powered TPMS node measuring pressure, temperature, and acceleration in wheel wells. IC Role / Device Role / Timing Role: Ultra-low-power data acquisition and RF wakeup controller interfacing with ASK/OOK transceiver. Use Value: 400 nA Halt mode maximizes 10+ year battery life; internal RTC enables scheduled sensor reads and transmission windows. |
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 |
|---|---|---|---|
| STM8AL3L6ATCY | 48 Kbytes Flash, 2 Kbytes RAM, no LCD controller, same 64-pin LQFP package | Suitable for non-LCD automotive nodes where display is handled externally | Select when LCD integration is unnecessary and BOM cost reduction is prioritized over feature headroom |
| RL78/F13-GB | Renesas RL78 core, 32 Kbytes Flash, 2.5–5.5 V operation, no integrated LCD driver | Requires external LCD bias IC; broader voltage range but lacks AEC-Q100 Grade 1 certification at 125 °C | Choose only if existing RL78 toolchain and ecosystem outweigh need for certified 125 °C operation and integrated LCD |
Compared with STM8AL3L8ATCY, STM8AL3L6ATCY reduces memory and removes LCD functionality for cost-sensitive nodes, while RL78/F13-GB trades AEC-Q100 Grade 1 compliance and integrated display support for Renesas ecosystem alignment - neither offers identical low-power RTC accuracy or 400 nA Halt mode.
Availability
STM8AL3L8ATCY is available at Aetrix Electronics and suitable for automotive instrument clusters, body control modules, and smart HVAC systems requiring stable component supply across extended temperature and long lifecycle demands.
Supply support for STM8AL3L8ATCY 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, designing and manufacturing microcontrollers, power devices, sensors, and analog ICs for automotive, industrial, and consumer markets.
The STM8AL ultra-low-power family targets automotive body electronics and instrumentation, emphasizing AEC-Q100 compliance, sub-µA power states, and integrated peripherals like LCD and RTC to reduce system-level BOM count and board space.
FAQ
What is the maximum operating temperature for STM8AL3L8ATCY?
The STM8AL3L8ATCY is AEC-Q100 Grade 1 qualified and specified for continuous operation from -40 °C to +125 °C ambient temperature. This rating is validated per JEDEC JESD22-A108 and applies to all functional modes including Halt, Active-halt, and Run - critical for under-hood and dashboard-mounted automotive applications.
Does STM8AL3L8ATCY support LIN 2.0 communication?
Yes, STM8AL3L8ATCY includes three hardware USARTs fully compliant with LIN 2.0 physical layer specifications, including automatic sync-break detection, checksum handling, and configurable baud rates down to 1.2 kbps. The USARTs operate independently of CPU load via DMA, enabling reliable node operation in distributed automotive networks.
How does the LCD controller handle contrast control?
The LCD controller supports software-adjustable contrast via register-controlled bias voltage division and internal step-up converter output scaling. Contrast is tuned by modifying the VLCD voltage level and duty cycle (static, 1/2, or 1/3 bias) - no external potentiometer or DAC required. All settings persist through low-power modes.
Can STM8AL3L8ATCY wake from Halt mode using an external interrupt?
Yes, STM8AL3L8ATCY supports wake-up from Halt mode via any of its 40 external interrupt sources, including GPIO pins, comparators, RTC alarms, and communication interfaces. Wake-up latency is guaranteed at 4.7 µs, enabling rapid response to safety-critical events such as door open detection or crash sensor triggers.
STM8AL3L8ATCY 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, LCD, 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AL3L8ATCY FAQ
1.How can I place an order for STM8AL3L8ATCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3L8ATCY 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 STM8AL3L8ATCY reliable?
The price and inventory of STM8AL3L8ATCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3L8ATCY is usually 5 days.
3.What payment methods are accepted for STM8AL3L8ATCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3L8ATCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3L8ATCY?
STM8AL3L8ATCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3L8ATCY 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 STM8AL3L8ATCY?
For technical support, including STM8AL3L8ATCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3L8ATCY requirements.
6.How does Aetrix verify that STM8AL3L8ATCY is sourced from the original manufacturer or authorized distributors?
All STM8AL3L8ATCY 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 STM8AL3L8ATCY meets industry standards.
7.What is the process for return or replacement of STM8AL3L8ATCY?
All STM8AL3L8ATCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3L8ATCY, 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 STM8AL3L8ATCY part is unused and in its original packaging.
Return procedure for STM8AL3L8ATCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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