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STMicroelectronics STM8L101F3U6ATR
- Part No.:
- STM8L101F3U6ATR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 20-UFQFN
- Datasheet:
-
STM8L101F3U6ATR.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 20UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:16,861
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Product details
Overview
STM8L101F3U6ATR from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 8 Kbytes Flash, 1.5 Kbytes RAM, and integrated peripherals including two 16-bit timers, USART, SPI, I²C, two comparators, and infrared (IR) interface - designed for battery-powered sensor nodes and energy-harvesting applications operating from 1.65 V to 3.6 V.
For engineers reviewing the STM8L101F3U6ATR datasheet, STM8L101F3U6ATR pinout, STM8L101F3U6ATR application, or STM8L101F3U6ATR equivalent, key selection criteria include ultra-low active/halt current (150 µA/MHz / 0.3 µA), 20-pin UFQFPN3x3 package, SWIM debug interface, and IR remote control capability in a cost-optimized entry-level STM8L platform.
Technical Context
The STM8L101F3U6ATR implements the STM8 CISC core delivering up to 16 MIPS at 16 MHz, with dual clock system: 16 MHz internal RC (HSI) for full-speed operation and 38 kHz low-power RC (LSI) for watchdog and auto-wakeup unit (AWU). It supports nested interrupts with software priority control across up to 29 external sources.
Memory architecture includes ECC-protected Flash with in-application programming, 2 Kbytes of emulated data EEPROM, and flexible read/write protection. Low-power management features three modes - Wait, Active-halt, and Halt - with fast wake-up (<4 µs from Halt via AWU or external interrupt).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | STM8 8-bit CISC CPU, 16 MIPS @ 16 MHz - enables deterministic real-time control without complex toolchain overhead. |
| Flash / EEPROM | 8 Kbytes Flash + 2 Kbytes data EEPROM (emulated) - supports firmware updates and nonvolatile parameter storage without external memory. |
| RAM | 1.5 Kbytes static RAM - sufficient for lightweight RTOS, sensor fusion buffers, and protocol stacks (e.g., BLE over UART). |
| Supply Voltage | 1.65 V to 3.6 V - compatible with single-cell Li-ion, LiFePO₄, and multi-cell alkaline/NiMH battery systems. |
| Low-Power Consumption | Halt mode: 0.3 µA, Active-halt: 0.8 µA, Run: 150 µA/MHz - extends coin-cell life to >10 years in periodic-sensing applications. |
| Peripherals | USART (fractional baud), SPI, I²C (400 kHz), 2× 16-bit timers, 1× 8-bit timer, 2× comparators, IR interface, beeper - integrates essential mixed-signal functions for compact end nodes. |
| Operating Temp | -40 °C to +85 °C - qualified for industrial and consumer environments without derating. |
Pinout & Package
STM8L101F3U6ATR is housed in a 20-pin Ultra Thin Fine Pitch Quad Flat No-lead (UFQFPN) package, 3 × 3 mm body, 0.5 mm pitch, with wettable flanks for automated optical inspection. Pin 1 marked by top-side laser dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main 1.65–3.6 V supply rail; decoupling required within 1 cm of pin. |
| VSS | Ground | Digital ground reference; connect to PCB ground plane with low-inductance path. |
| NRST | Reset input | Active-low reset with internal pull-up; accepts 1.65–3.6 V logic; supports external reset button or supervisor IC. |
| SWIM | Single-wire debug interface | Enables non-intrusive programming and debugging via dedicated pin; no JTAG overhead. |
| PA0 | GPIO / LED driver | High-sink capable (max 20 mA) - directly drives IR LED or status indicator without external transistor. |
| PA1–PA7 | General-purpose I/O | All support external interrupt mapping, programmable pull-ups, and analog comparator inputs. |
| PB0–PB5 | General-purpose I/O | Include USART TX/RX, SPI SCK/MOSI/MISO, I²C SCL/SDA - multiplexed per peripheral enable. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low power Halt mode | 0.3 µA typical - enables multi-year operation on CR2032 coin cell in wake-on-event sensor nodes. |
| Integrated IR transmitter interface | Dedicated hardware modulation at 30–56 kHz - eliminates need for external timer+transistor circuitry for remote control. |
| Emulated data EEPROM | 2 Kbytes with wear leveling and error correction - sustains >100 k write cycles for calibration data or device configuration. |
| SWIM debug interface | Single-pin, high-speed (up to 2 MHz), non-intrusive - reduces debug footprint and preserves GPIO count. |
| Comparator with selectable inputs | 2 independent comparators, each with 4 analog inputs - supports battery voltage monitoring, threshold detection, and zero-crossing sensing. |
Applications
| Smart Metering Sensor Node | Wireless Remote Control Transmitter |
|---|---|
Use Scenario: Battery-powered ultrasonic flow meter sampling every 30 seconds, transmitting data via UART-to-LoRa module. IC Role / Device Role / Timing Role: Main controller managing ADC acquisition, temperature compensation, sleep/wake scheduling, and IR or UART communication. Use Value: 0.3 µA Halt current and 4 µs wake-up ensure >15-year CR2032 lifetime; integrated comparators monitor supply brown-out. |
Use Scenario: Compact IR remote for HVAC or audio equipment with custom button matrix and NEC/RC-5 encoding. IC Role / Device Role / Timing Role: IR signal generator with precise carrier frequency (38 kHz), pulse-width modulation, and key scan logic. Use Value: Hardware IR modulator eliminates software timing jitter; PA0's 20 mA sink drives IR LED directly at 100 mA peak. |
| Industrial Temperature Monitor | Energy-Harvesting Switch |
Use Scenario: DIN-rail mounted ambient temperature sensor with I²C digital output and local display backlight control. IC Role / Device Role / Timing Role: Analog front-end conditioner, I²C master to local sensor, PWM dimmer for LED backlight. Use Value: Dual 16-bit timers generate stable PWM (0.1% duty resolution); 38 kHz LSI enables accurate AWU wake intervals. |
Use Scenario: Piezoelectric-harvested wall switch powering BLE beacon only during press event. IC Role / Device Role / Timing Role: Energy manager triggering ultra-fast wake (4 µs), sampling, RF transmission, then returning to 0.3 µA Halt. Use Value: Sub-µA deep-sleep current minimizes leakage loss; SWIM allows field firmware update without disassembly. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-power 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STM8L051F3P6 | Same core, 8 Kbytes Flash, but adds 12-bit ADC and 1.5 Kbytes RAM - no IR interface or beeper timer. | Better suited for analog sensor acquisition; lacks native IR modulation hardware. | Select when ADC precision > IR functionality; requires external IR driver circuit. |
| EFM8SB10F8G-A-QSOP24 | Silicon Labs 8051 core, 8 Kbytes Flash, 0.5 µA Halt, integrated USB, no IR block - higher EMI immunity, QFN24 package. | Preferred for USB-C connected devices; lacks dedicated IR peripheral and comparator flexibility. | Choose for USB-native edge nodes; not drop-in due to different debug (JTAG vs SWIM) and peripheral register map. |
Compared with STM8L051F3P6, STM8L101F3U6ATR trades ADC capability for IR hardware and lower system BOM cost; versus EFM8SB10F8G-A-QSOP24, it offers superior IR integration and simpler toolchain but lacks USB and higher EMI robustness.
Availability
STM8L101F3U6ATR is available at Aetrix Electronics and suitable for smart metering sensor nodes, wireless remote control transmitters, industrial temperature monitors, and energy-harvesting switches requiring stable component supply across extended product lifecycles.
Supply support for STM8L101F3U6ATR 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 since 1987.
The STM8L101 series belongs to ST's ultra-low-power 8-bit MCU family, engineered specifically for cost-sensitive, battery-constrained applications where sub-µA sleep current, fast wake-up, and minimal external components are critical - such as remote controls, IoT endpoints, and portable instrumentation.
FAQ
Does STM8L101F3U6ATR support in-application programming (IAP) of Flash memory?
Yes. The device supports full in-application programming via its embedded bootloader and SWIM interface. Flash pages can be erased and rewritten while the application runs, enabling field firmware updates and parameter storage without halting execution. ECC protection ensures integrity during writes, and option bytes allow configurable write-protection per sector.
What is the maximum drive strength of PA0 in LED driver mode?
PA0 provides high-sink capability up to 20 mA continuous at VDD ≥ 2.4 V, with peak pulsed current up to 100 mA (duty cycle ≤ 10%, frequency ≤ 1 kHz). This allows direct driving of standard IR LEDs without external transistors, reducing BOM count and PCB area in remote control designs.
Can the internal 38 kHz RC oscillator be used as the system clock source?
No. The 38 kHz LSI oscillator is reserved exclusively for the independent watchdog (IWDG) and auto-wakeup unit (AWU); it cannot serve as the CPU clock source. The main system clock must derive from the 16 MHz HSI, external crystal, or clock input - ensuring deterministic timing for code execution and peripheral synchronization.
Is the 20-pin UFQFPN package RoHS and REACH compliant?
Yes. STM8L101F3U6ATR in UFQFPN20 packaging meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, with lead-free terminations and halogen-free molding compound. Full compliance documentation, including substance declarations and test reports, is available through ST's official product page and Aetrix Electronics' material disclosure portal.
STM8L101F3U6ATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 20-UFQFN
- Series:
- STM8L EnergyLite
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, SPI, UART/USART
- Peripherals:
- Infrared, POR, PWM, WDT
- Number of I/O:
- 18
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 2K x 8
- RAM Size:
- 1.5K x 8
- Voltage - Supply (Vcc/Vdd):
- 1.65V ~ 3.6V
- Data Converters:
- -
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8L101F3U6ATR FAQ
1.How can I place an order for STM8L101F3U6ATR through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8L101F3U6ATR 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 STM8L101F3U6ATR reliable?
The price and inventory of STM8L101F3U6ATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8L101F3U6ATR is usually 5 days.
3.What payment methods are accepted for STM8L101F3U6ATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8L101F3U6ATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8L101F3U6ATR?
STM8L101F3U6ATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8L101F3U6ATR 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 STM8L101F3U6ATR?
For technical support, including STM8L101F3U6ATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8L101F3U6ATR requirements.
6.How does Aetrix verify that STM8L101F3U6ATR is sourced from the original manufacturer or authorized distributors?
All STM8L101F3U6ATR 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 STM8L101F3U6ATR meets industry standards.
7.What is the process for return or replacement of STM8L101F3U6ATR?
All STM8L101F3U6ATR units undergo pre-shipment inspection (PSI). If there is an issue with STM8L101F3U6ATR, 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 STM8L101F3U6ATR part is unused and in its original packaging.
Return procedure for STM8L101F3U6ATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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