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STMicroelectronics STM8AL3L66TCY
- Part No.:
- STM8AL3L66TCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AL3L66TCY.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
STM8AL3L66TCY 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 MSPS), 12-bit DAC with output buffer, two ultra-low-power comparators, RTC with BCD calendar and auto-wakeup (0.95 ppm resolution), and five low-power modes - including active-halt with full RTC (1.3 μA) and halt with PDR (400 nA). It targets battery-powered automotive body electronics such as smart sensors and dashboard displays.
For engineers reviewing the STM8AL3L66TCY datasheet, STM8AL3L66TCY pinout, STM8AL3L66TCY application, or STM8AL3L66TCY equivalent, key selection criteria include AEC-Q100 qualification, sub-μA low-power operation across multiple sleep states, integrated LCD driver with step-up converter, dual comparator wakeup capability, and support for LIN 2.0/ISO 7816/IrDA via USART.
Technical Context
The STM8AL3L66TCY implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz max frequency and supporting up to 40 external interrupt sources. 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 programmable voltage detector (PVD), five selectable BOR thresholds, and ultra-low leakage I/Os (50 nA per pin). The RTC operates independently in active-halt mode with periodic interrupt and alarm, while the LCD controller supports internal step-up converter and static/dynamic drive for automotive-grade segment displays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard, 3-stage pipeline, 16 MIPS peak at 16 MHz |
| Flash / EEPROM / RAM | 32 Kbyte Flash (20-year retention at 55 °C), 1 Kbyte true data EEPROM (300 kcycle endurance), 2 Kbyte RAM |
| ADC / DAC | 12-bit ADC with 25 channels, 1 MSPS sampling; 12-bit DAC with output buffer on PB4–PB6 |
| Low-Power Modes | Wait (typ. 5.1 μA), low-power wait (3 μA), active-halt with RTC (1.3 μA), halt with PDR (400 nA) |
| LCD Support | Up to 4×28 segments with integrated step-up converter; only available in STM8AL3Lxx series |
| Operating Range | 1.8 V to 3.6 V supply (down to 1.65 V in power-down); -40 °C to 125 °C ambient temperature |
| Communication Interfaces | SPI, Fast I²C (400 kHz), USART with ISO 7816, IrDA, LIN 1.3/2.0 support |
Pinout & Package
LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, ECOPACK®2 qualified. Pin count and function mapping align with STM8AL3Lx6T variant (LCD-enabled 32-pin configuration).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply / Ground | Dual power domains: VDDA for analog peripherals, VDD for digital; separate VSSA/VSS pins reduce noise coupling |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/O | 41 total I/Os; all mappable to interrupt vectors; 50 nA ultra-low leakage per I/O in halt mode |
| OSC_IN / OSC_OUT | HSE crystal interface | Supports 1–16 MHz external crystal; enables precise timing for RTC and communication interfaces |
| LSI / LSE_IN / LSE_OUT | Low-speed oscillator inputs | LSE (32 kHz) drives RTC in active-halt; LSI (38 kHz RC) provides backup clock source |
| NRST | Reset input | Active-low reset with programmable BOR thresholds; supports ultra-low-power POR/PDR |
| SWIM | Single-wire interface for debug | Enables non-intrusive on-chip programming and debugging without dedicated JTAG pins |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for automotive applications operating from -40 °C to +125 °C with robust ESD/EMC performance |
| Ultra-low-power RTC with BCD calendar | Auto-wakeup from Halt with 0.95 ppm resolution; maintains timekeeping during 400 nA halt mode |
| Integrated LCD controller | Drives up to 4×28 segments with internal step-up converter; eliminates external bias supply in dashboard displays |
| Dual ultra-low-power comparators | One rail-to-rail comparator with wakeup capability; one with fixed threshold for windowed monitoring |
| Flexible clock security system | Detects HSE/LSE failure and automatically switches to safe RC source without system crash |
Applications
| Automotive Smart Sensors | Dashboard LCD Displays |
|---|---|
|
Use Scenario: Tire pressure monitoring system (TPMS) node with local sensing and RF transmission. IC Role / Device Role / Timing Role: Main controller managing pressure/temp ADC acquisition, RTC-timed wakeups, LIN bus communication, and ultra-low-power sleep scheduling. Use Value: 400 nA halt mode extends battery life beyond 10 years; dual comparators monitor sensor thresholds without CPU intervention. |
Use Scenario: Instrument cluster display with segmented LCD and backlight control. IC Role / Device Role / Timing Role: LCD driver and system manager handling segment multiplexing, beeper tone generation, and CAN/LIN gateway functions. Use Value: Integrated step-up converter powers LCD from single 3.3 V rail; 4×28 segment support enables multi-function gauge rendering without external drivers. |
| Body Control Modules (BCM) | Automotive Door Module Controllers |
|
Use Scenario: Centralized lighting and window control unit with LIN slave interface. IC Role / Device Role / Timing Role: Real-time actuator sequencing engine using advanced TIM1 for PWM dimming and quadrature encoder input for position feedback. Use Value: 16-bit advanced control timer supports motor commutation; 1.3 μA active-halt with RTC enables periodic status polling without waking main CPU. |
Use Scenario: Power door lock actuator with anti-pinch detection and secure keyless entry interface. IC Role / Device Role / Timing Role: Safety-critical controller executing analog comparator-based current sensing, watchdog-monitored state machine, and ISO 7816 contactless smart card interface. Use Value: Independent and window watchdogs ensure fail-safe operation; 12-bit ADC monitors motor current with internal reference for drift-free measurement. |
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 |
|---|---|---|---|
| STM8AL3L68TCY | Same die, higher Flash/EPPROM configuration: 64 Kbyte Flash, 2 Kbyte EEPROM | Required when firmware size exceeds 32 Kbyte or EEPROM logging depth >1 Kbyte | Select if future firmware expansion or extended data logging is needed; pin- and code-compatible upgrade path |
| RL78/F13-GB | Renesas RL78 core, 24 MHz max, 32 Kbyte Flash, but no integrated LCD controller or 32 kHz RTC crystal oscillator | Lacks native LCD drive and ultra-low-power RTC with 0.95 ppm resolution; requires external components for same functionality | Choose only if existing RL78 toolchain and ecosystem outweigh loss of integrated LCD/RTC features |
Compared with STM8AL3L66TCY, STM8AL3L68TCY offers scalable memory without hardware redesign, while RL78/F13-GB trades integrated peripherals for higher CPU throughput - making the STM8AL3L66TCY optimal for cost-sensitive, LCD-centric automotive nodes where sub-μA sleep and AEC-Q100 compliance are mandatory.
Availability
STM8AL3L66TCY is available at Aetrix Electronics and suitable for automotive body electronics, battery-powered sensor nodes, and dashboard display modules requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for STM8AL3L66TCY 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 for industrial, automotive, and consumer markets.
The STM8AL3Lxx product line delivers ultra-low-power 8-bit MCUs optimized for AEC-Q100 Grade 1 automotive applications - specifically targeting battery-operated body electronics, smart sensors, and LCD-based human-machine interfaces where sub-μA sleep current and integrated analog peripherals are critical.
FAQ
What is the maximum operating temperature range for STM8AL3L66TCY?
The STM8AL3L66TCY is qualified for operation from -40 °C to +125 °C ambient temperature, meeting AEC-Q100 Grade 1 requirements. This rating is validated across all electrical parameters including Flash write/erase endurance, RTC accuracy, and ADC/DAC performance - not just thermal survival.
Does STM8AL3L66TCY support LIN 2.0 physical layer directly?
No - the STM8AL3L66TCY implements LIN 2.0 protocol stack in firmware via its USART peripheral, which supports LIN break detection, sync field handling, and checksum calculation. External LIN transceiver (e.g., TLE7259-3GE) is required for physical layer compliance.
How many I/O pins support interrupt-on-change capability?
All 41 GPIOs support interrupt vector mapping, with each port group (PA–PD) having dedicated EXTI lines. Up to 28 pins can be individually configured for edge-triggered interrupts (rising/falling/both), enabling flexible wake-from-halt scenarios without polling overhead.
Is the internal 32 kHz LSE oscillator sufficient for RTC accuracy in automotive environments?
Yes - when paired with a 32.768 kHz ±20 ppm crystal, the LSE-driven RTC achieves 0.95 ppm resolution and maintains ±1.5 seconds/month accuracy over -40 °C to +125 °C, validated per AEC-Q200 stress testing protocols for automotive timing stability.
STM8AL3L66TCY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- STM8A
- Packaging:
- Tray
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- 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:
- 32KB (32K 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 ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AL3L66TCY FAQ
1.How can I place an order for STM8AL3L66TCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3L66TCY 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 STM8AL3L66TCY reliable?
The price and inventory of STM8AL3L66TCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3L66TCY is usually 5 days.
3.What payment methods are accepted for STM8AL3L66TCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3L66TCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3L66TCY?
STM8AL3L66TCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3L66TCY 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 STM8AL3L66TCY?
For technical support, including STM8AL3L66TCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3L66TCY requirements.
6.How does Aetrix verify that STM8AL3L66TCY is sourced from the original manufacturer or authorized distributors?
All STM8AL3L66TCY 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 STM8AL3L66TCY meets industry standards.
7.What is the process for return or replacement of STM8AL3L66TCY?
All STM8AL3L66TCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3L66TCY, 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 STM8AL3L66TCY part is unused and in its original packaging.
Return procedure for STM8AL3L66TCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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