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STMicroelectronics STM8AL31E88TCY
- Part No.:
- STM8AL31E88TCY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AL31E88TCY.pdf
- Description:
- IC MCU 8BIT 64KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,538
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Product details
Overview
STM8AL31E88TCY 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, 4 KB RAM, 12-bit ADC (1 Msps, 28 channels), dual 12-bit DACs, LCD controller (8×40), AES hardware accelerator, RTC with ±0.5 ppm accuracy, and five low-power modes including 400 nA Halt. It targets body electronics, dashboard instrumentation, and smart sensors requiring extended battery life and functional safety compliance.
For engineers reviewing the STM8AL31E88TCY datasheet, STM8AL31E88TCY pinout, STM8AL31E88TCY application, or STM8AL31E88TCY equivalent, key selection criteria include its 1.65–3.6 V operating range, -40 to 125 °C temperature grade, LQFP48 package with 48 I/Os, SWIM debug interface, and automotive-grade reset/supply management with programmable BOR thresholds.
Technical Context
This MCU implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates dual crystal oscillators (32 kHz LSE + 1–16 MHz HSE), factory-trimmed 16 MHz HSI and 38 kHz LSI RC sources, and clock security system for fail-safe operation.
The peripheral set includes three 16-bit general-purpose timers (TIM2/TIM3/TIM5), one 16-bit advanced control timer (TIM1) for motor control, independent/window watchdogs, beeper timer, two SPIs, fast I²C (400 kHz), three USARTs supporting IrDA/LIN 1.3/2.0, and DMA with dedicated channels for ADC, AES, DAC, and communication interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time execution and efficient code density. |
| Max Clock Frequency | 16 MHz; delivers 16 CISC MIPS peak performance for responsive control-loop timing in automotive subsystems. |
| Flash / EEPROM / RAM | 64 KB Flash (with RWW), 2 KB data EEPROM (ECC-protected), 4 KB RAM; supports robust firmware updates and parameter storage. |
| ADC Resolution & Speed | 12-bit, up to 1 Msps across 28 channels; enables high-fidelity sensor acquisition (e.g., temperature, pressure, position). |
| Low-Power Halt Current | 400 nA at VDD = 1.65–3.6 V; allows multi-year battery operation in always-on vehicle modules like door handles or tire sensors. |
| RTC Accuracy | ±0.5 ppm with digital calibration; eliminates external compensation circuitry for precise timekeeping in telematics or event logging. |
| AES Acceleration | Hardware AES-128 engine; offloads encryption tasks from CPU, reducing latency and power for secure firmware updates or CAN message signing. |
| Operating Temperature | -40 to +125 °C; meets under-hood and cabin-mounted automotive requirements without derating. |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), thermally enhanced for automotive ambient conditions. Pin count and I/O mapping optimized for compact body-control modules with integrated display or sensor interface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual-supply domains support separate analog/digital regulation; 400 nA Halt mode requires stable low-leakage decoupling. |
| NRST | Active-low reset input | Accepts external reset; internal ultra-low-power POR/PDR and programmable BOR ensure reliable startup across voltage transients. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7 | General-purpose I/Os | Up to 48 mappable GPIOs with interrupt capability; 50 nA ultra-low leakage per I/O extends battery life in sleep states. |
| OSC_IN / OSC_OUT | HSE crystal oscillator terminals | Supports 1–16 MHz external crystal; used for main system clock or as reference for PLL-free precision timing. |
| LSE_IN / LSE_OUT | LSE crystal oscillator terminals | Drives 32.768 kHz crystal for RTC; enables calendar functions and wake-up from Halt with <1.4 µA active-RTC current. |
| SWIM | Single-wire interface for debug | Enables non-intrusive programming and real-time debugging without halting CPU; critical for in-vehicle firmware validation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power RTC | BCD calendar with alarm, digital calibration (±0.5 ppm), and anti-tamper detection - enables tamper-evident logging in access control systems. |
| Dual 12-bit DACs | Independent buffered outputs on PB4–PB6; supports analog actuator control (e.g., mirror positioning, HVAC valve drive) without external DACs. |
| 2 Ultra-low-power comparators | One rail-to-rail, one fixed-threshold; both support wake-up from Halt - ideal for battery voltage monitoring or intrusion detection triggers. |
| Automotive qualification | AEC-Q100 Grade 1 (-40 to +125 °C), BOR with 5 programmable thresholds, and ESD protection per ISO 10605 - ensures reliability in harsh vehicle environments. |
| LCD controller | Supports 8×40 or 4×44 segments with integrated step-up converter; enables direct drive of segmented displays in instrument clusters or control panels. |
Applications
| Body Control Module (BCM) | Automotive Instrument Cluster |
|---|---|
Use Scenario: Centralized control of door locks, window lifts, lighting, and wipers in modern vehicles. IC Role / Device Role / Timing Role: Main system controller executing LIN/CAN gateway logic, sensor polling, and actuator PWM generation. Use Value: Five low-power modes and 400 nA Halt enable >10-year battery backup for retained functionality during vehicle sleep cycles. |
Use Scenario: Driving analog gauges, LED indicators, and segmented LCD displays in driver-facing dashboards. IC Role / Device Role / Timing Role: Display controller with integrated LCD driver and real-time clock for odometer/calendar functions. Use Value: On-chip 8×40 LCD controller and ±0.5 ppm RTC eliminate external display drivers and TCXO, reducing BOM cost and PCB area. |
| Smart Tire Pressure Sensor (TPMS) Node | Engine Bay Ambient Sensor Hub |
Use Scenario: Battery-powered wireless sensor node measuring pressure, temperature, and acceleration inside tires. IC Role / Device Role / Timing Role: Data acquisition and preprocessing unit interfacing with piezoresistive pressure sensor and MEMS accelerometer. Use Value: 12-bit ADC (1 Msps) and internal temp sensor enable high-resolution, self-calibrated measurements; 1.4 µA Active-Halt mode extends 10+ year battery life. |
Use Scenario: Monitoring under-hood temperature, humidity, and voltage for thermal management and diagnostics. IC Role / Device Role / Timing Role: Environmental sensor aggregator with AES-128 encryption for secure CAN message transmission. Use Value: Hardware AES engine reduces CPU load and power consumption during encrypted telemetry upload, preserving battery in always-on nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AL3L88TCY | Same package and pinout, but lacks AES hardware accelerator and has reduced Flash (32 KB vs. 64 KB). | Suitable for cost-sensitive body electronics without cryptographic requirements. | Select when firmware size ≤32 KB and no secure boot or OTA update encryption is needed. |
| RL78/F13-64FB | Renesas RL78 core, 64 KB Flash, 12-bit ADC (1 Msps), but no integrated LCD controller or AES; operates down to 1.6 V. | Better suited for non-LCD applications requiring ultra-low-voltage operation (e.g., battery monitors). | Choose if lower VDD min (1.6 V) or Renesas ecosystem compatibility outweighs LCD/AES advantages. |
Compared with STM8AL31E88TCY, STM8AL3L88TCY trades AES and Flash capacity for lower cost, while RL78/F13-64FB offers broader voltage tolerance but requires external display drivers and software-based cryptography - impacting design complexity and power efficiency in LCD/AES-dependent automotive nodes.
Availability
STM8AL31E88TCY is available at Aetrix Electronics and suitable for automotive body electronics, instrument clusters, TPMS nodes, and engine bay sensor hubs requiring stable component supply across extended product lifecycles.
Supply support for STM8AL31E88TCY 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, specializing in automotive, industrial, and power solutions with broad IP portfolios and vertical manufacturing capabilities.
The STM8AL ultra-low-power 8-bit MCU family targets automotive body electronics and sensor nodes where extended battery life, AEC-Q100 compliance, and integrated peripherals (LCD, RTC, AES) reduce system-level complexity and cost.
FAQ
What is the maximum operating temperature for STM8AL31E88TCY?
The STM8AL31E88TCY is rated for operation from -40 °C to +125 °C and is AEC-Q100 Grade 1 qualified. This specification is validated per ST's production test flow and applies across the full 1.65–3.6 V supply range, making it suitable for under-hood and cabin-mounted automotive applications without thermal derating.
Does STM8AL31E88TCY support in-circuit programming via SWIM?
Yes - STM8AL31E88TCY features a single-wire interface module (SWIM) enabling non-intrusive in-system programming and real-time debugging. It supports full Flash and EEPROM read/write/erase operations using standard ST-LINK/V2 or compatible debuggers, with no need for external programming hardware or bootloader development.
Can the internal RTC maintain time accuracy during deep sleep modes?
Yes - the low-power RTC remains fully operational in Active-Halt mode (1.4 µA typical) when clocked by the 32.768 kHz LSE crystal. Its digital calibration achieves ±0.5 ppm accuracy over temperature and voltage, and it retains BCD calendar, alarm, and tamper-detection functions without waking the CPU.
How many I/O pins support external interrupt capability?
All 48 GPIOs on the LQFP48 package are individually mappable to external interrupt vectors. Each port pin can be configured as an interrupt source with configurable edge sensitivity (rising/falling/both), enabling flexible wake-up handling from multiple sensors or switches without additional logic.
STM8AL31E88TCY Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-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:
- 41
- 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 25x12b; 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:
STM8AL31E88TCY FAQ
1.How can I place an order for STM8AL31E88TCY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL31E88TCY 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 STM8AL31E88TCY reliable?
The price and inventory of STM8AL31E88TCY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL31E88TCY is usually 5 days.
3.What payment methods are accepted for STM8AL31E88TCY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL31E88TCY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL31E88TCY?
STM8AL31E88TCY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL31E88TCY 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 STM8AL31E88TCY?
For technical support, including STM8AL31E88TCY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL31E88TCY requirements.
6.How does Aetrix verify that STM8AL31E88TCY is sourced from the original manufacturer or authorized distributors?
All STM8AL31E88TCY 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 STM8AL31E88TCY meets industry standards.
7.What is the process for return or replacement of STM8AL31E88TCY?
All STM8AL31E88TCY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL31E88TCY, 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 STM8AL31E88TCY part is unused and in its original packaging.
Return procedure for STM8AL31E88TCY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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