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STMicroelectronics STM8AL3L68TCY
- Part No.:
- STM8AL3L68TCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AL3L68TCY.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,499
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Product details
Overview
STM8AL3L68TCY from STMicroelectronics is an AEC-Q100 qualified automotive-grade 8-bit ultra-low-power microcontroller 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 1.8 V to 3.6 V across –40 °C to 125 °C and targets body electronics, dashboard instrumentation, and smart sensors.
For engineers reviewing the STM8AL3L68TCY datasheet, STM8AL3L68TCY pinout, STM8AL3L68TCY application, or STM8AL3L68TCY equivalent, key selection criteria include AEC-Q100 qualification, sub-μA low-power modes (down to 400 nA in Halt with PDR), LCD driver capability, dual comparator wakeup, and SWIM-based non-intrusive debugging support.
Technical Context
The STM8AL3L68TCY 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-Wait, low-power Run (5.1 μA), low-power Wait (3 μA), active-Halt with full RTC (1.3 μA), and Halt with PDR (400 nA)-with fast 4.7 µs wakeup from Halt. The RTC supports 0.95 ppm resolution and periodic interrupt generation independent of main CPU activity.
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 Operating Frequency | 16 MHz; delivers 16 CISC MIPS peak performance while maintaining ultra-low power consumption in active modes. |
| Flash / EEPROM / RAM | 32 Kbyte Flash (20-year retention at 55 °C), 1 Kbyte true data EEPROM (300 kcycle endurance), 2 Kbyte RAM; supports robust firmware updates and parameter storage. |
| ADC / DAC | 12-bit ADC with 25 channels, 1 Mbps sampling; 12-bit DAC with output buffer on PB4–PB6; enables high-fidelity sensor signal conditioning and analog actuator control. |
| Low-Power Modes | Five modes including Halt with PDR (400 nA) and active-Halt with RTC (1.3 μA); allows continuous timekeeping and event-triggered wake-up without external components. |
| LCD Controller | Supports up to 4×28 segments with integrated step-up converter; eliminates need for external bias supply in automotive display modules. |
| Operating Temperature | –40 °C to +125 °C; qualified per AEC-Q100 Grade 0 for under-hood and instrument cluster applications. |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK® certified. Pin count and I/O mapping align with STM8AL3Lxx series for drop-in compatibility in LCD-enabled automotive designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation across wide temperature range; decoupling critical for EMC compliance. |
| NRST | Active-low reset input | Accepts standard push-pull or open-drain reset sources; internal pull-up enables single-button reset without external resistor. |
| SWIM | Single-wire interface for debug | Enables non-intrusive programming and real-time debugging using one dedicated pin; no JTAG overhead or pin multiplexing conflict. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7 | General-purpose I/Os | 41 total mappable I/Os with interrupt capability; all support ultra-low leakage (50 nA) to preserve battery life in always-on systems. |
| LCDB0–LCDB15, LCDSEG0–LCDSEG27 | LCD segment and common drivers | Direct drive for 4×28-segment displays; integrated charge pump generates required bias voltage from single 3.3 V rail. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for automotive use up to +125 °C ambient; meets stress test requirements for vibration, thermal cycling, and ESD. |
| Ultra-low-power RTC with auto-wakeup | 0.95 ppm resolution and periodic interrupt generation in active-Halt mode; enables precise sleep/wake scheduling without MCU intervention. |
| Dual ultra-low-power comparators | One with fixed threshold, one rail-to-rail; both support wakeup from all low-power modes-critical for battery-powered sensor monitoring. |
| SWIM debug interface | Single-pin, non-intrusive on-chip debugging and programming; reduces BOM cost and PCB footprint vs. SWD/JTAG solutions. |
| Integrated step-up converter for LCD | Eliminates external DC-DC bias supply; simplifies layout and improves reliability in space-constrained instrument clusters. |
Applications
| Automotive Instrument Cluster | Smart Door Control Module |
|---|---|
|
Use Scenario: Driving digital gauges, warning indicators, and backlight dimming in vehicle dashboards. IC Role / Device Role / Timing Role: Primary MCU managing LCD rendering, CAN/LIN communication, and real-time gauge updates via TIM1 PWM outputs. Use Value: Integrated LCD controller and 4×28 segment support reduce component count; 125 °C rating ensures reliability behind glass dashboards. |
Use Scenario: Monitoring window position, lock status, and anti-pinch detection in power window and central locking systems. IC Role / Device Role / Timing Role: Sensor fusion hub processing analog window motor current, digital switch inputs, and LIN bus commands. Use Value: Dual comparators enable real-time overcurrent detection; ultra-low-power Halt mode extends battery backup runtime during vehicle sleep. |
| Automotive HVAC Display | Tire Pressure Monitoring System (TPMS) Host |
|
Use Scenario: Controlling segmented LCD display, button inputs, and fan speed feedback in climate control panels. IC Role / Device Role / Timing Role: Dedicated display controller with built-in step-up converter driving 3×16-segment LCD; handles touch debounce and IR remote decoding. Use Value: Eliminates external LCD bias IC; 32 Kbyte Flash accommodates multi-language UI assets and calibration tables. |
Use Scenario: Aggregating TPMS sensor data via SPI/UART and displaying pressure/temperature on compact dashboard display. IC Role / Device Role / Timing Role: Low-power host MCU waking periodically to poll sensors, process ADC readings, and update LCD with CRC-protected values. Use Value: 400 nA Halt mode with PDR preserves coin-cell battery for >5 years; 12-bit ADC ensures ±1 kPa pressure measurement accuracy. |
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 |
|---|---|---|---|
| STM8AL3L48TCY | Same package and core, but 16 Kbyte Flash and no DAC; retains full LCD, RTC, and comparator functionality. | Suitable for simpler display-only functions without analog output requirements. | Select when DAC and extra Flash are unnecessary-reduces cost and code size overhead. |
| RL78/F13-GB | Renesas RL78 core; 24 MHz max, 128 Kbyte Flash, 10 Kbyte RAM; lower standby current (230 nA) but no integrated LCD driver. | Requires external LCD bias circuitry; better suited for general-purpose sensing where display integration is secondary. | Choose when higher Flash/RAM and deeper sleep are prioritized over integrated display support. |
Compared with STM8AL3L48TCY, the STM8AL3L68TCY adds 16 Kbyte Flash and a 12-bit DAC-enabling richer UI logic and analog actuator control. Versus RL78/F13-GB, it trades raw memory capacity for native LCD integration and AEC-Q100-certified peripheral consistency.
Availability
STM8AL3L68TCY is available at Aetrix Electronics and suitable for automotive instrument clusters, smart door modules, HVAC displays, and TPMS hosts requiring stable component supply, long-term lifecycle assurance, and AEC-Q100 compliance.
Supply support for STM8AL3L68TCY 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 silicon for industrial and automotive markets.
The STM8AL3Lxx product line targets ultra-low-power automotive body electronics, emphasizing AEC-Q100 qualification, extended temperature operation, integrated LCD support, and sub-microamp power modes for always-on subsystems.
FAQ
What is the maximum operating junction temperature for STM8AL3L68TCY?
The device is rated for operation up to +125 °C ambient temperature and is qualified per AEC-Q100 Grade 0, which specifies a maximum junction temperature of +150 °C under defined thermal conditions. Thermal resistance (θJA) is 40 °C/W for the LQFP48 package, enabling reliable operation in sealed automotive enclosures with minimal heatsinking.
Does STM8AL3L68TCY support LIN 2.0 physical layer directly?
Yes-the integrated USART supports LIN 2.0 protocol via hardware-level break detection, sync field handling, and checksum generation. It requires only an external LIN transceiver (e.g., TLE7259-3GE) connected to the TX/RX pins; no software bit-banging or additional timing peripherals are needed.
Can the internal 38 kHz RC oscillator be used as the RTC clock source?
No-the RTC must be clocked by either the 32 kHz LSE crystal oscillator or the 32 kHz LSI RC oscillator. The 38 kHz RC is reserved for low-power run/wake timing and cannot feed the RTC prescaler; using it would violate timing accuracy requirements for calendar functions.
How many I/O pins support external interrupt capability?
All 41 GPIO pins (PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7) are individually mappable to external interrupt vectors. Each port supports configurable edge sensitivity (rising/falling/both) and priority grouping via the interrupt controller, enabling flexible wakeup sources for sensor or switch events.
STM8AL3L68TCY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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:
- 41
- 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 25x12b; 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:
STM8AL3L68TCY FAQ
1.How can I place an order for STM8AL3L68TCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3L68TCY 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 STM8AL3L68TCY reliable?
The price and inventory of STM8AL3L68TCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3L68TCY is usually 5 days.
3.What payment methods are accepted for STM8AL3L68TCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3L68TCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3L68TCY?
STM8AL3L68TCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3L68TCY 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 STM8AL3L68TCY?
For technical support, including STM8AL3L68TCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3L68TCY requirements.
6.How does Aetrix verify that STM8AL3L68TCY is sourced from the original manufacturer or authorized distributors?
All STM8AL3L68TCY 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 STM8AL3L68TCY meets industry standards.
7.What is the process for return or replacement of STM8AL3L68TCY?
All STM8AL3L68TCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3L68TCY, 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 STM8AL3L68TCY part is unused and in its original packaging.
Return procedure for STM8AL3L68TCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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