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STMicroelectronics STM8L101G3U6
- Part No.:
- STM8L101G3U6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 28-UFQFN
- Datasheet:
-
STM8L101G3U6.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 28UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:2,384
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Product details
Overview
STM8L101G3U6 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 remote control interface. It operates from 1.65 V to 3.6 V across –40 °C to +85 °C, with dynamic run current of 150 µA/MHz - optimized for battery-powered sensor nodes and smart metering endpoints.
For engineers reviewing the STM8L101G3U6 datasheet, STM8L101G3U6 pinout, STM8L101G3U6 application, or STM8L101G3U6 equivalent, key selection criteria include its 28-pin UFQFPN package, 0.3 µA Halt-mode power consumption, SWIM debug interface, IR modulation capability, and EEPROM-with-ECC memory architecture.
Technical Context
The STM8L101G3U6 implements a CISC-based STM8 core delivering up to 16 MIPS at 16 MHz, paired with dual clock domains: a 16 MHz internal RC oscillator (HSI) for active operation and a 38 kHz low-power RC (LSI) for watchdog and auto-wakeup functions. Its nested interrupt controller supports 29 external sources with software-configurable priority.
Memory subsystem includes 8 Kbytes Flash with ECC protection, 2 Kbytes data EEPROM, and 1.5 Kbytes SRAM - all accessible during low-power modes. Peripheral integration centers on timing-critical functions: TIM2/TIM3 support PWM/IC/OC, TIM4 provides beeper output (1/2/4 kHz), and the IR block enables carrier-frequency modulated transmission without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8 8-bit CISC CPU, 16 MIPS @ 16 MHz - enables deterministic real-time control in resource-constrained systems. |
| Flash Memory | 8 Kbytes with ECC and read/write protection - ensures firmware integrity and secure field updates. |
| RAM Size | 1.5 Kbytes static RAM - sufficient for sensor fusion buffers and protocol stack state in sub-100 µA sleep designs. |
| Low-Power Modes | Halt (0.3 µA), Active-halt (0.8 µA), Wait - supports multi-year battery life in wake-on-event applications. |
| Supply Voltage | 1.65 V to 3.6 V - compatible with single-cell Li-ion, LiFePO₄, and dual-cell alkaline batteries. |
| Operating Temperature | –40 °C to +85 °C - validated for industrial and outdoor metering environments. |
| Communication Interfaces | SPI (master/slave), I²C (400 kHz multimaster), USART (fractional baud rate) - enables interoperability with sensors, displays, and host MCUs. |
Pinout & Package
STM8L101G3U6 is housed in a 28-pin Ultra Thin Fine Pitch Quad Flat No-lead (UFQFPN) package, 4 × 4 mm body, 0.5 mm pitch, with exposed thermal pad. Pin assignment follows ST's standard 28-pin UFQFPN layout for STM8L101Gx variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Main 1.65–3.6 V supply rail; decoupling required within 1 cm of pin for stable low-power operation. |
| VSS | Ground reference | Digital ground return; must be connected to PCB ground plane with low-inductance path. |
| NRST | Active-low reset input | Asynchronous reset trigger; internal pull-up enables standalone reset without external circuitry. |
| SWIM | Single-wire debug interface | Enables non-intrusive programming and real-time debugging via one GPIO pin - no JTAG header needed. |
| PA0 | High-sink LED driver I/O | Capable of sinking up to 20 mA - directly drives IR LEDs or status indicators without external drivers. |
| PA1–PA7, PB0–PB7, PC0–PC7 | General-purpose I/Os | All 24 pins support external interrupts, programmable pull-ups, and alternate functions (USART, SPI, I²C, timers). |
| OSC_IN / OSC_OUT | External crystal oscillator terminals | Supports 1–24 MHz crystals for precise timing; optional bypass for internal RC-only operation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Halt mode | 0.3 µA typical - extends coin-cell battery life beyond 10 years in periodic wake-up sensor applications. |
| Infrared (IR) modulation block | Integrated carrier generator (30–60 kHz) and modulator - eliminates external IR encoder ICs and reduces BOM count. |
| Error Correction Code (ECC) | On-chip Flash ECC detection/correction - prevents silent firmware corruption in harsh EMI environments. |
| Hardware beeper timer | Generates 1/2/4 kHz tones on any GPIO - replaces external piezo drivers in user-interface feedback circuits. |
| Auto-wakeup unit (AWU) | Configurable timeout from 1 ms to 2 sec using LSI clock - enables precise duty-cycled sensing without CPU intervention. |
Applications
| Smart Utility Metering | Wireless Sensor Node |
|---|---|
|
Use Scenario: Battery-powered gas/water meter with pulse counting, LCD display, and IR optical port for manual readout. IC Role / Device Role / Timing Role: Main system controller managing sensor acquisition, IR data transmission, and low-power sleep scheduling. Use Value: 0.3 µA Halt current and integrated IR block enable >15-year battery life and eliminate external IR encoder components. |
Use Scenario: Environmental monitoring node (temperature/humidity) transmitting data via sub-GHz RF module on scheduled intervals. IC Role / Device Role / Timing Role: Central coordinator handling sensor I²C reads, data formatting, RF interface control, and deep-sleep wake-up timing. Use Value: AWU-driven wake-up and 150 µA/MHz active current minimize energy per measurement cycle, extending AA battery life to 5+ years. |
| Industrial Control Panel | Portable Medical Device |
|
Use Scenario: Local HMI for PLC peripheral with push-button inputs, LED indicators, buzzer feedback, and RS-485 communication. IC Role / Device Role / Timing Role: Dedicated UI processor managing debounced inputs, LED/PWM outputs, beeper tones, and UART-to-RS485 bridge. Use Value: High-sink PA0 (20 mA) drives LEDs directly; beeper timer generates audible alerts without external oscillator or driver IC. |
Use Scenario: Handheld blood glucose monitor requiring low-voltage operation, button interface, LCD drive, and USB/IR data export. IC Role / Device Role / Timing Role: System-on-chip managing analog front-end ADC sequencing, LCD segment control, IR data packetization, and battery voltage monitoring. Use Value: 1.65 V minimum supply allows operation down to near-dead battery; integrated comparators enable precision threshold detection for test strip insertion sensing. |
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 | 4 Kbytes Flash, no IR block, TSSOP20 package - lower peripheral count and smaller footprint. | Lacks IR modulation hardware; requires external components for optical communication. | Select when IR functionality is unnecessary and board space is constrained to <5 mm². |
| EFM8LB12F32ES1-QFP32 | Silicon Labs 8051 core, 32 Kbytes Flash, 2.25 KB RAM, 1.8–3.6 V - higher memory and mixed-signal integration. | Includes precision op-amps and DACs; targets analog-intensive sensor signal conditioning. | Choose when on-chip analog front-end features outweigh ST's ecosystem/toolchain advantages. |
Compared with STM8L051F3P6, the STM8L101G3U6 adds IR modulation and 4 Kbytes more Flash for firmware flexibility; versus EFM8LB12F32ES1-QFP32, it trades analog peripherals for lower cost, simpler toolchain, and proven ultra-low-power behavior in certified metering designs.
Availability
STM8L101G3U6 is available at Aetrix Electronics and suitable for smart metering, wireless sensor networks, portable medical devices, and industrial HMI requiring stable component supply over extended product lifecycles.
Supply support for STM8L101G3U6 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, MEMS, and automotive semiconductors since 1987.
The STM8L series was engineered specifically for ultra-low-power embedded applications demanding multi-year battery life, robust memory reliability, and minimal external component count - targeting utility metering, IoT edge nodes, and portable instrumentation.
FAQ
Does STM8L101G3U6 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 without external programmers. ECC verification occurs automatically during write operations to ensure data integrity.
What is the maximum frequency of the internal 16 MHz RC oscillator (HSI) and its accuracy over temperature?
The HSI oscillator is factory-trimmed to ±1% accuracy at 25 °C and VDD = 3.0 V. Over –40 °C to +85 °C and 1.65–3.6 V, typical variation is ±3.5%, as documented in Table 22 of the datasheet. For timing-critical applications, an external crystal on OSC_IN/OSC_OUT is recommended.
Can PA0 be used simultaneously as an IR output and a general-purpose I/O?
No. PA0 serves as the dedicated IR output channel when the IR peripheral is enabled. Its function is multiplexed: in IR mode, it outputs modulated carrier signals; in GPIO mode, it operates as a high-sink (20 mA) digital I/O. Mode selection is controlled by the IREN bit in the IR register.
Is the 96-bit unique ID accessible via firmware, and how is it used in practice?
Yes. The 96-bit unique ID is mapped to memory addresses 0x4865–0x486A and readable via standard load instructions. It is commonly used for device authentication, secure boot key derivation, and generating globally unique identifiers for cloud registration without external EEPROM or provisioning steps.
STM8L101G3U6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 28-UFQFN
- Series:
- STM8L EnergyLite
- Packaging:
- Tray
- 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:
- 26
- 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:
STM8L101G3U6 FAQ
1.How can I place an order for STM8L101G3U6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8L101G3U6 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 STM8L101G3U6 reliable?
The price and inventory of STM8L101G3U6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8L101G3U6 is usually 5 days.
3.What payment methods are accepted for STM8L101G3U6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8L101G3U6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8L101G3U6?
STM8L101G3U6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8L101G3U6 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 STM8L101G3U6?
For technical support, including STM8L101G3U6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8L101G3U6 requirements.
6.How does Aetrix verify that STM8L101G3U6 is sourced from the original manufacturer or authorized distributors?
All STM8L101G3U6 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 STM8L101G3U6 meets industry standards.
7.What is the process for return or replacement of STM8L101G3U6?
All STM8L101G3U6 units undergo pre-shipment inspection (PSI). If there is an issue with STM8L101G3U6, 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 STM8L101G3U6 part is unused and in its original packaging.
Return procedure for STM8L101G3U6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM8L101G3U6 Tags
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