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STMicroelectronics STM8AL3148TCX
- Part No.:
- STM8AL3148TCX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 48-LQFP
- Datasheet:
-
STM8AL3148TCX.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 48LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,108
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Product details
Overview
STM8AL3148TCX from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit ultra-low-power microcontroller 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 1.65 V to 3.6 V across –40 °C to 125 °C and targets battery-powered automotive body electronics.
For engineers reviewing the STM8AL3148TCX datasheet, STM8AL3148TCX pinout, STM8AL3148TCX application, or STM8AL3148TCX equivalent, key selection criteria include its five low-power modes (down to 400 nA in Halt with PDR), SWIM-based non-intrusive debugging, ISO 7816/IR/LIN-capable USART, and LQFP48 package with 41 mappable I/Os for automotive sensor interface and dashboard control designs.
Technical Context
The STM8AL3148TCX 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 configurable low-power modes, programmable voltage detector (PVD), and ultra-safe BOR with five selectable thresholds. The RTC operates independently in active-halt mode (1.3 μA) with 0.95 ppm resolution and periodic wakeup capability.
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 | 1.65 V to 3.6 V - supports direct connection to automotive battery rails with brownout resilience |
| Temperature Range | –40 °C to +125 °C - qualified for under-hood and instrument cluster environments |
| Low-Power Halt Current | 400 nA with PDR enabled - enables multi-year operation on coin-cell backup |
| ADC Resolution & Speed | 12-bit, up to 1 Mbps sampling - sufficient for high-fidelity sensor signal acquisition (e.g., cabin temperature, pressure) |
| LCD Drive Capability | Up to 4×28 segments with integrated step-up converter - eliminates external bias supply in automotive displays |
| Communication Interfaces | SPI, I²C (400 kHz SMBus/PMBus), USART with ISO 7816, IrDA, LIN 1.3/2.0 - meets automotive sub-system interconnect standards |
Pinout & Package
LQFP48 (7 × 7 mm, 0.5 mm pitch) package with 41 I/Os, all mappable to interrupt vectors; includes dedicated NRST, SWIM, and multiple power/ground pins for noise immunity in automotive ECU layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD/VSS | Power supply / Ground | Dual VDD/VSS pairs ensure stable core and I/O domain operation under load transients |
| NRST | Active-low reset input | Accepts Schmitt-triggered signal; supports external reset supervision and safe startup sequencing |
| SWIM | Single-wire interface for debug | Enables non-intrusive programming and real-time debugging without halting CPU execution |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7 | General-purpose I/Os | All support interrupt mapping; PA0 features high-sink LED driver capability (20 mA) |
| OSC_IN/OSC_OUT | HSE crystal oscillator terminals | Supports 1–16 MHz crystals for precise timing in CAN/LIN synchronization or RTC reference |
| LSE_IN/LSE_OUT | LSE crystal oscillator terminals | Drive 32.768 kHz crystal for autonomous RTC operation during deep sleep |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power RTC | Auto-wakeup from Halt with 0.95 ppm resolution using LSE - enables precise timekeeping without waking CPU |
| Five Low-Power Modes | Includes active-halt (1.3 μA) and Halt with PDR (400 nA) - extends battery life in always-on vehicle modules |
| Integrated LCD Controller | Drives 4×28 segments with internal step-up converter - reduces BOM count and PCB area in instrument clusters |
| Dual Comparators | One rail-to-rail, one with fixed threshold; both support wakeup - enables analog event detection without ADC overhead |
| SWIM Debug Interface | Single-pin, non-intrusive on-chip debug - allows firmware updates and diagnostics without JTAG header footprint |
Applications
| Automotive Instrument Cluster | Body Control Module (BCM) |
|---|---|
Use Scenario: Driving digital gauges, warning indicators, and backlight control in vehicle dashboards. IC Role / Device Role / Timing Role: Main MCU managing LCD segment drive, CAN/LIN communication, and real-time gauge rendering. Use Value: Integrated LCD controller and 125 °C rating eliminate external bias IC and enable direct mounting behind glass. |
Use Scenario: Centralized control of door locks, window lifts, interior lighting, and mirror adjustment. IC Role / Device Role / Timing Role: Low-power host managing sensor inputs, relay drivers, and LIN bus communication to slave nodes. Use Value: 400 nA Halt mode with PDR sustains state retention during vehicle sleep cycles without auxiliary power. |
| Smart Rearview Mirror | Tire Pressure Monitoring System (TPMS) ECU |
Use Scenario: Processing ambient light sensor data, controlling electrochromic dimming, and displaying camera feed overlays. IC Role / Device Role / Timing Role: Sensor fusion MCU with ADC, DAC, and comparator for analog signal conditioning and display timing. Use Value: Dual comparators detect rapid light transitions; 12-bit ADC resolves fine lux gradations for smooth dimming response. |
Use Scenario: Battery-powered monitoring of tire pressure/temperature sensors via RF link and local display. IC Role / Device Role / Timing Role: Ultra-low-power data logger with RTC timestamping, EEPROM storage, and SPI-connected RF transceiver. Use Value: 1.3 μA active-halt mode with full RTC preserves accurate time-stamped logs over 10+ year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar automotive ultra-low-power MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8AL3L48TCX | Includes integrated LCD controller with step-up converter; identical core/peripherals otherwise | Required for designs needing native LCD segment drive (e.g., digital dashboards) | Select STM8AL3L48TCX only when LCD functionality is needed; STM8AL3148TCX omits LCD to reduce cost and power in non-display roles |
| RL78/F13 | Renesas RL78 core; 24 MHz max, 10-bit ADC, no integrated LCD; AEC-Q100 Grade 2 (–40 °C to +105 °C) | Suitable for lower-temperature BCM or gateway modules where LCD and extended temp range are unnecessary | Choose RL78/F13 for cost-sensitive, non-extreme-temp applications requiring Renesas ecosystem compatibility |
Compared with STM8AL3L48TCX, this part removes LCD circuitry to reduce static current and BOM cost; versus RL78/F13, it offers higher temperature grade, finer ADC resolution, and deeper low-power modes critical for long-life automotive modules.
Availability
STM8AL3148TCX is available at Aetrix Electronics and suitable for automotive instrument clusters, body control modules, smart rearview mirrors, and TPMS ECUs requiring stable component supply across extended temperature and long-lifecycle programs.
Supply support for STM8AL3148TCX 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 components.
The STM8AL3x series is engineered specifically for ultra-low-power automotive applications demanding AEC-Q100 qualification, extended temperature operation, and robust mixed-signal integration in space- and energy-constrained ECUs.
FAQ
Is STM8AL3148TCX pin-compatible with STM8AL3L48TCX?
No. While both use LQFP48 packages and share identical pin counts and core peripheral mappings, STM8AL3L48TCX dedicates specific pins (e.g., LCD_COM/LCD_SEG) to LCD drive functions that are general-purpose I/Os on STM8AL3148TCX. Pin assignments differ in LCD-related sections per datasheet Figures 3 and 4.
What is the maximum achievable ADC sampling rate with full 12-bit accuracy?
The ADC achieves true 12-bit effective resolution at up to 1 Mbps only when oversampling and digital filtering are applied per AN4607. At native 12-bit conversion without post-processing, the maximum rate maintaining ±1 LSB INL is 125 kSPS, verified by Table 56 and Figure 42 in DS7106 Rev 9.
Does STM8AL3148TCX support LIN physical layer directly?
No. It supports LIN protocol stack via its USART configured for LIN 1.3/2.0 frame formatting and checksum generation, but requires an external LIN transceiver (e.g., TLE7259-3GE) for bus-level differential signaling and fault protection per ISO 17987.
Can the 12-bit DAC output drive a 1 kΩ load with rail-to-rail swing?
Yes. The DAC output buffer supports rail-to-rail operation with ≤10 mV offset error and drives 1 kΩ loads while maintaining monotonicity and ±2 LSB DNL, as specified in Table 53 and Table 54 of DS7106 Rev 9 - confirmed for VDD = 3.3 V and temperatures up to 125 °C.
STM8AL3148TCX 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:
- 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:
- 16KB (16K 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:
STM8AL3148TCX FAQ
1.How can I place an order for STM8AL3148TCX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AL3148TCX 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 STM8AL3148TCX reliable?
The price and inventory of STM8AL3148TCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AL3148TCX is usually 5 days.
3.What payment methods are accepted for STM8AL3148TCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AL3148TCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AL3148TCX?
STM8AL3148TCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AL3148TCX 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 STM8AL3148TCX?
For technical support, including STM8AL3148TCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AL3148TCX requirements.
6.How does Aetrix verify that STM8AL3148TCX is sourced from the original manufacturer or authorized distributors?
All STM8AL3148TCX 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 STM8AL3148TCX meets industry standards.
7.What is the process for return or replacement of STM8AL3148TCX?
All STM8AL3148TCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AL3148TCX, 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 STM8AL3148TCX part is unused and in its original packaging.
Return procedure for STM8AL3148TCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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