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STMicroelectronics STM8AL3168TAX
- Part No.:
- STM8AL3168TAX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AL3168TAX.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,746
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Product details
Overview
STM8AL3168TAX 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 LCD controller supporting up to 4×28 segments. 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 door modules and smart sensors.
For engineers reviewing the STM8AL3168TAX datasheet, STM8AL3168TAX pinout, STM8AL3168TAX application, or STM8AL3168TAX equivalent, key selection criteria include its five low-power modes (down to 400 nA in Halt with PDR), 16 MHz STM8 core with Harvard architecture, SWIM-based non-intrusive debugging, and integrated LCD driver for direct segment control in instrument clusters and dashboard displays.
Technical Context
The STM8AL3168TAX implements a Harvard-architecture 8-bit 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 BCD calendar, alarm interrupt, and periodic auto-wakeup with 0.95 ppm resolution when clocked by LSE.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit Harvard, 3-stage pipeline, 16 MIPS peak at 16 MHz |
| Operating Voltage | 1.8 V to 3.6 V (down to 1.65 V in power-down mode) |
| Temperature Range | –40 °C to +125 °C, AEC-Q100 Grade 0 qualified |
| Low-Power Halt Current | 400 nA with PDR enabled, enabling multi-year battery operation |
| ADC Performance | 12-bit, 25-channel, up to 1 MSPS sampling rate with internal temp sensor & reference |
| DAC Output | 12-bit, buffered output on PB4–PB6, ±1 LSB INL/DNL accuracy |
| LCD Driver | Supports up to 4×28 segments with integrated step-up converter for single-supply operation |
Pinout & Package
LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, ECOPACK2 certified.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Main power supply | 1.8–3.6 V input for digital core and I/Os; decoupling required per datasheet layout guidelines |
| VSS | Ground reference | Digital ground plane connection; separate analog ground not required but recommended for ADC/DAC stability |
| NRST | Active-low reset input | Asynchronous reset with programmable threshold BOR; supports external pull-up and debouncing |
| SWIM | Single-wire interface for debug | Enables non-intrusive programming and real-time debugging via dedicated pin (no JTAG overhead) |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7 | General-purpose I/Os | Up to 41 mappable GPIOs, all support external interrupt vectors; 50 nA ultra-low leakage per I/O |
| OSC_IN / OSC_OUT | HSE crystal oscillator terminals | Supports 1–16 MHz external crystal; internal load capacitors configurable via option bytes |
| OSC32_IN / OSC32_OUT | LSE crystal oscillator terminals | 32 kHz external crystal for RTC; enables 0.95 ppm resolution and sub-μA active-Halt mode |
| VLCD | LCD voltage supply | Internal step-up converter output (up to 5.5 V) for LCD bias; eliminates need for external charge pump |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power RTC with auto-wakeup | Enables precise timekeeping and scheduled wakeups from Halt mode at 1.3 μA, critical for periodic sensor polling |
| Integrated LCD controller | Drives up to 4×28 segments directly with internal step-up converter, reducing BOM count in automotive displays |
| SWIM debug interface | Single-pin, non-intrusive on-chip debugging and programming without halting CPU execution |
| Dual comparator system | One rail-to-rail comparator with wakeup capability and one fixed-threshold comparator for window monitoring |
| Memory retention | Flash data retention ≥20 years at 55 °C; EEPROM endurance ≥300 kcycles for parameter storage in harsh environments |
Applications
| Automotive Door Module | Smart HVAC Sensor Node |
|---|---|
Use Scenario: Centralized control of window lift, mirror adjustment, and interior lighting in vehicle door panels. IC Role / Device Role / Timing Role: Main MCU executing motor control logic, LIN communication, and low-power state management during vehicle sleep. Use Value: 400 nA Halt current extends battery backup life; integrated comparators monitor switch inputs without external circuitry. | Use Scenario: Battery-powered temperature/humidity sensing node with local display and CAN/LIN reporting in cabin climate systems. IC Role / Device Role / Timing Role: Sensor fusion processor with RTC-triggered periodic measurements and LCD-driven status display. Use Value: On-chip 32 kHz RTC and LCD driver eliminate external timing and display ICs; 12-bit ADC ensures ±0.5 °C thermal accuracy. |
| Instrument Cluster Segment Driver | Automotive Body Control Unit (BCU) |
Use Scenario: Driving analog-style gauges and segmented indicators in digital instrument clusters. IC Role / Device Role / Timing Role: Dedicated LCD controller and segment driver with built-in step-up converter for high-contrast display at low VDD. Use Value: VLCD output up to 5.5 V enables full-segment activation from 2.5 V supply; reduces display subsystem power by 30% vs. external boosters. | Use Scenario: Centralized control of lighting, wipers, and horn functions with fail-safe diagnostics and power sequencing. IC Role / Device Role / Timing Role: Safety-critical MCU managing watchdog supervision (window + independent), BOR thresholds, and voltage monitoring. Use Value: Five selectable BOR thresholds and PVD enable adaptive brown-out response across varying battery conditions (e.g., cold crank vs. alternator regulation). |
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 |
|---|---|---|---|
| STM8AL3166TAX | Same die, no LCD controller; 32 Kbyte Flash, identical peripherals except LCD block omitted | Used where segment display is unnecessary (e.g., relay controllers, junction boxes) | Select when display functionality is absent and cost reduction is prioritized over LCD integration |
| STM8L152R8T6 | Non-AEC-Q100, max 80 °C ambient, no LCD, lower Flash (64 KB), no 32 kHz RTC crystal support | Targeted at industrial or consumer battery devices, not automotive under-hood use | Only suitable for non-automotive designs requiring higher Flash density and relaxed qualification |
Compared with STM8AL3166TAX, the STM8AL3168TAX adds full LCD driving capability and segment bias generation, while STM8L152R8T6 lacks AEC-Q100 qualification, 125 °C operation, and LSE-based RTC precision-making it unsuitable for automotive body electronics requiring long-term reliability and thermal robustness.
Availability
STM8AL3168TAX is available at Aetrix Electronics and suitable for automotive body electronics, battery-powered sensor nodes, and instrument cluster displays requiring stable component supply, long-lifecycle support, and AEC-Q100 compliance.
Supply support for STM8AL3168TAX 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, and automotive-grade silicon for industrial and transportation markets.
The STM8AL3x series is engineered specifically for ultra-low-power automotive body electronics, emphasizing extended battery life, functional safety features (BOR, dual WDT), and integrated peripherals (LCD, RTC, comparators) to reduce system-level complexity.
FAQ
What is the maximum operating frequency and core architecture of the STM8AL3168TAX?
The STM8AL3168TAX features an 8-bit STM8 core with Harvard architecture and a 3-stage pipeline, achieving a maximum operating frequency of 16 MHz and delivering up to 16 CISC MIPS. It uses a single-cycle instruction set optimized for deterministic real-time control in automotive applications.
Does the STM8AL3168TAX support external crystal oscillators for both main and RTC clocks?
Yes-it supports a 1–16 MHz external crystal on OSC_IN/OSC_OUT for the main system clock and a dedicated 32 kHz crystal on OSC32_IN/OSC32_OUT for the low-power RTC, enabling precise timekeeping with 0.95 ppm resolution and sub-microamp active-Halt operation.
How many I/O pins does the STM8AL3168TAX provide, and what low-power capabilities do they offer?
The STM8AL3168TAX provides up to 41 general-purpose I/O pins, all mappable to external interrupt vectors. Each I/O exhibits ultra-low leakage of 50 nA, supporting long-duration battery operation in sleep modes, and is fully compatible with 1.8 V to 3.6 V operation across the full temperature range.
Is the STM8AL3168TAX pin-compatible with other members of the STM8AL3x family?
No-pin compatibility is limited to same-package variants within the same subfamily. STM8AL3168TAX (LQFP48) shares pinout with STM8AL3166TAX and STM8AL3L68TAX, but differs from LQFP32 or VFQFPN32 variants due to differing peripheral mappings and LCD signal assignments.
STM8AL3168TAX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 48-LQFP
- 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:
- 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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AL3168TAX FAQ
1.How can I place an order for STM8AL3168TAX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3168TAX 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 STM8AL3168TAX reliable?
The price and inventory of STM8AL3168TAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3168TAX is usually 5 days.
3.What payment methods are accepted for STM8AL3168TAX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3168TAX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3168TAX?
STM8AL3168TAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3168TAX 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 STM8AL3168TAX?
For technical support, including STM8AL3168TAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3168TAX requirements.
6.How does Aetrix verify that STM8AL3168TAX is sourced from the original manufacturer or authorized distributors?
All STM8AL3168TAX 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 STM8AL3168TAX meets industry standards.
7.What is the process for return or replacement of STM8AL3168TAX?
All STM8AL3168TAX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3168TAX, 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 STM8AL3168TAX part is unused and in its original packaging.
Return procedure for STM8AL3168TAX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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