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STMicroelectronics STM8AL3138TAY
- Part No.:
- STM8AL3138TAY
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AL3138TAY.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,293
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Product details
Overview
STM8AL3138TAY 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, RTC, LCD controller (not enabled in this variant), 12-bit ADC (25 channels, up to 1 Mbps), 12-bit DAC with output buffer, two ultra-low-power comparators, 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 battery-powered automotive body electronics.
For engineers reviewing the STM8AL3138TAY datasheet, STM8AL3138TAY pinout, STM8AL3138TAY application, or STM8AL3138TAY equivalent, key selection criteria include its AEC-Q100 qualification, 400 nA halt-mode current with PDR, 1.3 μA active-halt mode with full RTC, 41 mappable I/Os, and support for LIN 2.0/ISO 7816/IrDA via USART.
Technical Context
The STM8AL3138TAY 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 with clock security system.
Power management includes five low-power modes-Wait, low-power run (5.1 μA), low-power wait (3 μA), active-halt with RTC (1.3 μA), and halt with PDR (400 nA)-plus programmable voltage detector (PVD) and BOR with five selectable thresholds for robust automotive supply supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Harvard, 3-stage pipeline STM8 CPU; enables deterministic real-time execution and efficient code density |
| Max Clock Frequency | 16 MHz; supports timing-critical automotive functions like LIN bus communication and motor control PWM |
| Flash Memory | 32 Kbyte; retains data for 20 years at 55 °C, suitable for firmware storage in long-lifecycle automotive modules |
| Data EEPROM | 1 Kbyte; rated for 300 k write/erase cycles, used for calibration data and configuration storage |
| Low-Power Halt Current | 400 nA with PDR; enables multi-year battery operation in always-on vehicle subsystems |
| ADC Resolution & Speed | 12-bit, up to 1 Mbps sampling; supports high-fidelity sensor acquisition (e.g., cabin temperature, pressure) |
| DAC Output | 12-bit with integrated output buffer; drives analog actuators or reference voltages without external op-amps |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK2 qualified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains support independent analog/digital supply routing and noise isolation |
| NRST | Active-low reset input | Accepts Schmitt-triggered signal; compatible with automotive watchdog and microcontroller reset networks |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7 | General-purpose I/Os | All 41 pins support interrupt mapping and alternate functions (USART, SPI, I²C, timers); PA0 has high-sink LED driver capability |
| OSC_IN / OSC_OUT | HSE crystal oscillator interface | Supports 1–16 MHz external crystal; essential for precise LIN baud rate generation and RTC accuracy |
| LSE_IN / LSE_OUT | LSE crystal oscillator interface | Drives 32.768 kHz crystal for RTC calendar and auto-wakeup with 0.95 ppm resolution |
| SWIM | Single-wire interface for debug and programming | Enables non-intrusive on-chip debugging and fast flash programming in production and field updates |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40 °C to 125 °C operation; meets automotive reliability and stress-test requirements |
| Ultra-low-power active-halt mode | 1.3 μA with full RTC running; enables time-stamped wake-up events without external real-time clock IC |
| Dual comparator system | One rail-to-rail comparator + one with fixed threshold; supports windowed voltage monitoring and battery-level detection |
| Advanced control timer (TIM1) | 16-bit, 3-channel, complementary outputs with dead-time insertion; directly controls 3-phase BLDC motors |
| Integrated LIN 2.0 support | USART hardware with automatic sync-break detection and checksum handling; reduces host CPU overhead in body control modules |
Applications
| Body Control Module (BCM) | Smart Door Lock System |
|---|---|
Use Scenario: Centralized control of lighting, windows, mirrors, and door locks in modern vehicles. IC Role / Device Role / Timing Role: Main MCU executing LIN slave protocol, managing EEPROM-based user preferences, and coordinating wakeup via RTC alarm or CAN/LIN trigger. Use Value: 400 nA halt current extends backup battery life beyond 5 years; 41 I/Os simplify integration of diverse sensors and actuators without external GPIO expanders. | Use Scenario: Secure, low-power electronic lock actuation with tamper detection and audit logging. IC Role / Device Role / Timing Role: Standalone secure controller handling biometric input, encrypted key validation, and motor-driven bolt actuation with precise timing via TIM1. Use Value: 1.3 μA active-halt mode maintains real-time audit timestamps during sleep; internal 12-bit DAC generates precise reference voltages for analog sensor biasing. |
| Automotive HVAC Control | Occupancy Detection Unit |
Use Scenario: Cabin climate regulation using temperature, humidity, and sunlight sensors with fan/motor control. IC Role / Device Role / Timing Role: Sensor fusion hub with 12-bit ADC sampling thermistors and NTCs, driving DC fans via PWM from general-purpose timers. Use Value: 12-bit ADC with internal reference and temp sensor enables <±1.5 °C measurement accuracy without external precision references. | Use Scenario: Low-power occupancy sensing via capacitive or IR proximity detection in parked vehicle mode. IC Role / Device Role / Timing Role: Always-on event detector using comparator wakeup and ultra-low-leakage I/Os (<50 nA per pin) to monitor capacitance changes. Use Value: 50 nA I/O leakage prevents false triggers in multi-year battery deployments; comparator rail-to-rail input supports direct connection to unbuffered capacitive sense electrodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive 8-bit ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AL3L48TAY | Includes integrated LCD controller (4×28 segments) and step-up converter; identical Flash/RAM/peripherals otherwise | Required for dashboard displays or instrument clusters with segmented LCD; adds ~0.5 mA static LCD bias current | Select when display interface is needed; pin-compatible but requires LCD-specific PCB layout and firmware initialization |
| RL78/F13-F14 | 16-bit RL78 core, 24 MHz max, 32 Kbyte Flash, 4 Kbyte RAM; lower active current (125 μA/MHz) but no AEC-Q100 Grade 1 rating | Suitable for industrial or consumer automotive-adjacent systems where full AEC-Q100 is not mandated | Choose for higher code efficiency and larger RAM; verify qualification status per OEM requirement before automotive deployment |
Compared with STM8AL3L48TAY, the STM8AL3138TAY saves board space and BOM cost by omitting LCD circuitry while retaining identical low-power performance and automotive qualification; versus RL78/F13-F14, it offers guaranteed AEC-Q100 Grade 1 compliance and deeper sub-μA sleep modes critical for battery-backed automotive modules.
Availability
STM8AL3138TAY is available at Aetrix Electronics and suitable for automotive body electronics, smart access systems, and HVAC control requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for STM8AL3138TAY 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 solutions.
The STM8AL3x series targets ultra-low-power automotive applications demanding AEC-Q100 qualification, extended temperature operation, and minimal standby current-specifically engineered for battery-sensitive body electronics and comfort systems.
FAQ
Is STM8AL3138TAY pin-compatible with other STM8AL31xx variants?
Yes-STM8AL3138TAY uses the LQFP48 package and shares identical pinout with STM8AL3136TAY, STM8AL3146TAY, and STM8AL3148TAY. Differences are limited to Flash size (32 KB vs. 16 KB) and peripheral enablement; no PCB redesign is required when upgrading within the same package option.
Does STM8AL3138TAY support LIN 2.0 physical layer compliance?
Yes-the integrated USART includes hardware support for LIN 2.0, including automatic sync-break detection, checksum generation/verification, and configurable baud rates down to 1.2 kbps. External transceiver (e.g., TLE7259-3GE) is required for ISO 17987-4 physical layer compliance.
What is the maximum operating frequency of the internal 16 MHz RC oscillator?
The internal 16 MHz RC oscillator is factory-trimmed to ±1% accuracy over –40 °C to 125 °C and supports full-speed operation up to 16 MHz. It enables immediate MCU startup without external crystal, reducing BOM count and enabling fast wake-from-halt (<4.7 µs) in time-critical automotive responses.
Can the 12-bit DAC drive analog sensors directly?
Yes-the integrated 12-bit DAC includes an output buffer capable of sourcing/sinking ±5 mA, allowing direct connection to analog sensors requiring programmable bias (e.g., NDIR CO₂ sensors) or reference voltage generation without external op-amps or level-shifting circuitry.
STM8AL3138TAY 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:
- 8KB (8K 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AL3138TAY FAQ
1.How can I place an order for STM8AL3138TAY through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3138TAY 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 STM8AL3138TAY reliable?
The price and inventory of STM8AL3138TAY are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3138TAY is usually 5 days.
3.What payment methods are accepted for STM8AL3138TAY?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3138TAY transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3138TAY?
STM8AL3138TAY orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3138TAY 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 STM8AL3138TAY?
For technical support, including STM8AL3138TAY datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3138TAY requirements.
6.How does Aetrix verify that STM8AL3138TAY is sourced from the original manufacturer or authorized distributors?
All STM8AL3138TAY 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 STM8AL3138TAY meets industry standards.
7.What is the process for return or replacement of STM8AL3138TAY?
All STM8AL3138TAY units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3138TAY, 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 STM8AL3138TAY part is unused and in its original packaging.
Return procedure for STM8AL3138TAY:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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