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STMicroelectronics STM8AL3136UCX
- Part No.:
- STM8AL3136UCX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-VFQFN Exposed Pad
- Datasheet:
-
STM8AL3136UCX.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32VFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:1,248
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Product details
Overview
STM8AL3136UCX from STMicroelectronics is an AEC-Q100 qualified automotive-grade 8-bit ultra-low-power MCU featuring 32 Kbyte Flash, 2 Kbyte RAM, 1 Kbyte data EEPROM, 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 a 16-bit 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 such as smart sensors and dashboard modules.
For engineers reviewing the STM8AL3136UCX datasheet, STM8AL3136UCX pinout, STM8AL3136UCX application, or STM8AL3136UCX equivalent, key selection criteria include ultra-low-power operation (400 nA Halt mode), AEC-Q100 qualification, integrated LCD driver capability (though not enabled in this variant), SWIM-based debugging, and compatibility with LIN 2.0/ISO 7816/IrDA protocols in its USART.
Technical Context
The STM8AL3136UCX 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 to detect oscillator failure.
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) - supported by programmable voltage detector (PVD), ultra-safe BOR with five thresholds, and POR/PDR circuitry optimized for automotive transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | Harvard, 3-stage pipeline STM8 CPU; enables deterministic interrupt latency and efficient code density for safety-critical automotive firmware. |
| Max Clock Frequency | 16 MHz; delivers 16 CISC MIPS peak performance while maintaining sub-μA power states during idle. |
| Flash Memory | 32 Kbyte; supports 20-year data retention at 55 °C and in-system programming via SWIM interface. |
| ADC Resolution & Speed | 12-bit, up to 1 Mbps sampling rate across 25 channels; includes internal temp sensor and reference voltage for standalone sensor node operation. |
| DAC Output | 12-bit with output buffer on PB4–PB6; provides precise analog biasing or calibration signal generation without external op-amps. |
| Low-Power Halt Current | 400 nA with PDR enabled; enables multi-year battery life in always-on vehicle monitoring applications. |
| Operating Temperature | –40 °C to +125 °C; qualified per AEC-Q100 Grade 0 for under-hood and cabin-mounted automotive ECUs. |
| I/O Count | Up to 41 mappable GPIOs with interrupt capability; supports flexible peripheral routing for compact PCB layout in space-constrained modules. |
Pinout & Package
LQFP32 package (7 × 7 mm, 0.8 mm pitch), RoHS-compliant, ECOPACK® certified. Pin count and I/O mapping align with STM8AL31x6U variant (no LCD function enabled).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation under automotive load dump conditions. |
| NRST | Active-low reset input | Accepts Schmitt-triggered signal; supports external reset supervision and safe recovery after brownout. |
| SWIM | Single-wire interface for debug/programming | Enables non-intrusive in-circuit debugging and fast flash programming without dedicated JTAG pins. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/O ports | All 41 pins support interrupt-on-change and alternate functions (USART, SPI, I²C, timers); PA0 has high-sink LED driver capability. |
| OSC_IN / OSC_OUT | HSE crystal oscillator terminals | Supports 1–16 MHz external crystal; critical for precise LIN timing and RTC synchronization in networked modules. |
| LSI / LSE_IN / LSE_OUT | Low-speed oscillator inputs/outputs | LSE (32 kHz) drives RTC with 0.95 ppm resolution; LSI provides backup clock source during main oscillator failure. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Halt mode | 400 nA consumption with power-down regulator (PDR) active - enables >10-year battery life in always-on telematics sensors. |
| Integrated LIN 2.0/ISO 7816/IrDA support | USART hardware block implements LIN break detection, ISO 7816 T=0 protocol, and IrDA pulse shaping - eliminates external line drivers in door module nodes. |
| Dual comparator with wakeup | One rail-to-rail comparator and one with fixed threshold; both trigger interrupts from Halt mode - ideal for wake-on-voltage-event in battery monitoring. |
| Advanced timer suite | TIM1 (16-bit advanced control) supports complementary PWM with dead-time insertion; TIM2/TIM3 provide quadrature encoder and beeper functions - reduces external motor control ICs. |
| SWIM single-wire debug | Full programming and real-time debugging over one pin; preserves I/O count and simplifies production test fixture design. |
| AEC-Q100 Grade 0 qualification | Validated for –40 °C to +125 °C operation with extended reliability testing - meets OEM requirements for engine bay and HVAC control units. |
Applications
| Automotive Door Module | Smart Battery Sensor |
|---|---|
Use Scenario: Centralized control of window lift, mirror adjustment, and interior lighting in modern vehicle door assemblies. IC Role / Device Role / Timing Role: Main MCU executing LIN slave communication, PWM motor control, and capacitive touch sensing. Use Value: Ultra-low-power Halt mode extends sleep current below 1 µA, enabling energy harvesting from door motion while retaining full state on wake. |
Use Scenario: Real-time monitoring of 12 V lead-acid battery voltage, temperature, and cranking current in start-stop systems. IC Role / Device Role / Timing Role: Analog front-end controller interfacing with shunt resistor, thermistor, and voltage dividers; performs periodic wake-up sampling. Use Value: Integrated 12-bit ADC with internal reference and temp sensor eliminates external precision components; 400 nA Halt mode ensures >5-year shelf life without battery drain. |
| Dashboard Cluster Subsystem | Body Control Module (BCM) Node |
Use Scenario: Secondary processing unit for backlight dimming, warning indicator logic, and CAN message filtering in digital instrument clusters. IC Role / Device Role / Timing Role: Co-processor offloading timing-critical tasks from main cluster MCU; manages PWM-driven LED strings. Use Value: 12-bit DAC output buffer drives LED current directly; fast 4.7 µs wakeup from Halt enables responsive indicator activation without latency. |
Use Scenario: Distributed node managing trunk release, hood latch, and interior ambient lighting via LIN bus. IC Role / Device Role / Timing Role: LIN 2.0-compliant slave node with secure bootloader and EEPROM-based configuration storage. Use Value: On-chip 1 Kbyte data EEPROM endures 300 kcycles - stores adaptive learning values (e.g., actuator position limits) across vehicle lifetime. |
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 |
|---|---|---|---|
| STM8AL3L46UCX | Includes integrated LCD controller (4×28 segments) and step-up converter; same Flash/RAM/ADC/DAC specs. | Required for automotive displays (e.g., climate panel, seat controls); adds ~0.5 mA static LCD bias current. | Select when display integration reduces BOM cost and board area; avoid if LCD is unused due to higher quiescent current. |
| RL78/F13-F14 (Renesas) | 16-bit core, 24 MHz max, 32 Kbyte Flash, 3.5 µA Stop mode; no integrated LIN but supports it via software stack. | Better suited for mixed-signal applications requiring higher compute throughput; lacks AEC-Q100 Grade 0 option in base variants. | Prefer for new designs needing future scalability; STM8AL3136UCX remains optimal for cost-sensitive, ultra-low-power LIN slave nodes. |
Compared with STM8AL3L46UCX, the STM8AL3136UCX saves power in non-display applications and avoids LCD-related EMI; versus RL78/F13, it offers lower system-level BOM cost and guaranteed AEC-Q100 Grade 0 qualification out-of-box.
Availability
STM8AL3136UCX is available at Aetrix Electronics and suitable for automotive body electronics, battery monitoring systems, and LIN-based sensor nodes requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for STM8AL3136UCX 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 devices, sensors, and analog ICs for automotive, industrial, and consumer markets.
The STM8AL3x series is part of ST's automotive ultra-low-power MCU portfolio, engineered specifically for battery-sensitive, AEC-Q100-compliant applications including door modules, smart sensors, and distributed LIN nodes where sub-microamp quiescent current and robust EMC performance are mandatory.
FAQ
Is STM8AL3136UCX pin-compatible with other STM8AL31xx variants in LQFP32?
Yes - the STM8AL3136UCX uses the STM8AL31x6U pinout (32-pin LQFP, no LCD), matching STM8AL3138UCX and STM8AL3146UCX. All share identical VDD/VSS, SWIM, NRST, and peripheral pin mappings; differences are limited to Flash size and option byte configuration.
Does STM8AL3136UCX support hardware CRC calculation?
No - the STM8AL3136UCX does not integrate a dedicated CRC calculation unit. CRC must be implemented in firmware using the available 16-bit arithmetic instructions and lookup tables; this is typical for STM8AL3x series and documented in AN4403 application note.
What is the maximum allowed VDD slew rate during power-up?
The datasheet specifies a minimum VDD ramp time of 1 ms from 0 V to 1.8 V to ensure reliable POR detection. Exceeding 10 V/ms slew rate risks incomplete reset assertion; external RC filtering on VDD is recommended for automotive environments with fast transients.
Can the 12-bit DAC output drive a 10 kΩ load directly?
Yes - the DAC output buffer is specified to drive loads down to 10 kΩ with ≤1 LSB error across the full 0–VDD range, as verified in Table 55 of DS7106 Rev 9. No external op-amp is required for typical sensor calibration or biasing applications.
STM8AL3136UCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-VFQFN Exposed Pad
- Series:
- STM8A
- Packaging:
- Tape & Reel (TR)
- 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:
- 30
- 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 22x12b; 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:
STM8AL3136UCX FAQ
1.How can I place an order for STM8AL3136UCX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3136UCX 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 STM8AL3136UCX reliable?
The price and inventory of STM8AL3136UCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3136UCX is usually 5 days.
3.What payment methods are accepted for STM8AL3136UCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3136UCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3136UCX?
STM8AL3136UCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3136UCX 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 STM8AL3136UCX?
For technical support, including STM8AL3136UCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3136UCX requirements.
6.How does Aetrix verify that STM8AL3136UCX is sourced from the original manufacturer or authorized distributors?
All STM8AL3136UCX 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 STM8AL3136UCX meets industry standards.
7.What is the process for return or replacement of STM8AL3136UCX?
All STM8AL3136UCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3136UCX, 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 STM8AL3136UCX part is unused and in its original packaging.
Return procedure for STM8AL3136UCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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