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STMicroelectronics STM8L101K3T6
- Part No.:
- STM8L101K3T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8L101K3T6.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:12,900
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Product details
Overview
STM8L101K3T6 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 Halt-mode current as low as 0.3 µA - designed for battery-powered sensor nodes and energy-harvesting IoT endpoints.
For engineers reviewing the STM8L101K3T6 datasheet, STM8L101K3T6 pinout, STM8L101K3T6 application, or STM8L101K3T6 equivalent, key selection criteria include ultra-low active/halt current, SWIM-based debug capability, IR modulation support, ECC-protected Flash, and 30 GPIOs with LED driver output on PA0 - all in a compact 32-pin UFQFPN (5 × 5 mm) package.
Technical Context
The STM8L101K3T6 implements the CISC-based STM8 core delivering up to 16 MIPS at 16 MHz, with dual internal oscillators: a 16 MHz RC (HSI) for fast wake-up (<4 µs) and a 38 kHz RC (LSI) for autonomous low-power operation of the independent watchdog and auto-wakeup unit. Its nested interrupt controller supports 29 external sources with software-configurable priority.
Memory architecture includes 8 Kbytes of Flash with ECC, 2 Kbytes of emulated data EEPROM, and 1.5 Kbytes of static RAM - all accessible during low-power modes. Peripheral integration targets minimal BOM count: one beeper timer (1/2/4 kHz), SPI/I²C/USART with fractional baud rate generation, and two comparators with four selectable inputs each.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | STM8 8-bit CISC CPU, 16 MIPS @ 16 MHz - enables real-time sensor fusion and protocol stack execution without external co-processor |
| Flash / EEPROM | 8 Kbytes Flash with ECC + 2 Kbytes data EEPROM - ensures firmware integrity and nonvolatile parameter storage across 100k write cycles |
| RAM | 1.5 Kbytes static RAM - sufficient for RTOS context switching and buffered communication stacks (e.g., UART+I²C) |
| Supply Range | 1.65 V to 3.6 V - compatible with single-cell Li-ion, LiFePO₄, and alkaline battery systems without LDO overhead |
| Low-Power Modes | Halt (0.3 µA), Active-halt (0.8 µA), Wait - enables multi-year operation in wake-on-event sensor applications |
| Timers | TIM2/TIM3 (16-bit, up/down, 2-channel), TIM4 (8-bit) - supports PWM motor control, input capture for pulse counting, and IR carrier generation |
| Communication | USART (fractional baud), SPI (master/slave), I²C (400 kHz multimaster) - enables interoperability with sensors, displays, and host MCUs |
Pinout & Package
STM8L101K3T6 uses the UFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with exposed thermal pad. Pin functions are validated per ST's DocID15275 Rev 16, Figure 7 (32-pin package pinout).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply | Main 1.65–3.6 V supply rail; decoupling required within 1 cm for stable low-power operation |
| VSS | Ground | Digital ground reference; tied to thermal pad for optimal thermal performance |
| NRST | Reset input | Active-low reset with internal pull-up; supports external debounced push-button or supervisor IC |
| SWIM | Single-wire debug | Non-intrusive programming and debugging via dedicated pin - no UART/SWD pins consumed |
| PA0 | I/O with LED driver | High-sink capable (up to 20 mA) for direct infrared LED drive - eliminates external transistor in remote control designs |
| PA1–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/O | 30 total mappable GPIOs; all support external interrupts, programmable pull-ups, and analog comparator inputs |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-power Halt mode | 0.3 µA typical - extends shelf life and operational lifetime in intermittently active devices like smoke detectors |
| Hardware IR modulation | Integrated beeper timer + PA0 high-sink driver - enables direct 38 kHz carrier generation for NEC/RC-5 protocols without external oscillator |
| Error Correction Code (ECC) | On-chip Flash ECC detection/correction - prevents silent firmware corruption in harsh EMI environments (e.g., industrial gateways) |
| SWIM debug interface | Single-pin, non-intrusive on-chip programming - reduces PCB footprint and eliminates need for JTAG header in space-constrained modules |
| Flexible clock system | Dual RC oscillators (16 MHz HSI + 38 kHz LSI) - allows seamless transition between high-speed processing and sub-µA autonomous wake-up |
Applications
| Smart Meter Sensor Node | Wireless Remote Control Transmitter |
|---|---|
Use Scenario: Battery-powered gas/water meter with pulse counting, temperature sensing, and periodic RF transmission. IC Role / Device Role / Timing Role: Central controller managing sensor acquisition, low-power sleep scheduling, and IR/RF interface timing. Use Value: 0.3 µA Halt current and 4 µs wake-up enable >10-year battery life with daily RF bursts and hourly sensor reads. |
Use Scenario: Compact universal remote supporting NEC, RC-5, and Sony protocols with user-programmable keys. IC Role / Device Role / Timing Role: IR signal generator with precise 38 kHz carrier and modulated data framing. Use Value: Integrated beeper timer + PA0 LED driver eliminates external components - reducing BOM cost and board area by 30%. |
| Industrial Asset Monitor | Energy-Harvesting Environmental Sensor |
Use Scenario: Vibration/temperature node on rotating machinery powered by primary cell, transmitting alerts via LoRaWAN. IC Role / Device Role / Timing Role: Low-power event processor triggering wake-up on comparator threshold crossing or timer expiry. Use Value: 29 external interrupt sources and comparator inputs allow direct connection of analog sensors - avoiding ADC power overhead. |
Use Scenario: Solar-powered soil moisture sensor using supercapacitor storage and duty-cycled measurement. IC Role / Device Role / Timing Role: Energy-aware scheduler coordinating sensor read, computation, and radio transmit windows. Use Value: Active-halt mode (0.8 µA) maintains RAM content while awaiting harvest event - enabling instant resume without reinitialization. |
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 data EEPROM, same 32-pin TSSOP/UFQFPN package - lacks IR beeper timer and comparator inputs | Suitable for simpler sensor polling without EEPROM logging or IR output | Select when Flash requirement <4 KB and IR/comparator features are unnecessary - lower cost, identical footprint |
| EFM8LB12F32ES1-QFP32 | Silicon Labs 8051 core, 32 Kbytes Flash, 2.25 Kbytes RAM, 0.5 µA deep sleep - adds USB and higher analog integration | Better suited for USB-connected diagnostics tools or mixed-signal applications requiring more precision ADC/DAC | Choose when migrating from legacy 8051 toolchains or requiring USB interface - not drop-in compatible due to different core/peripheral map |
Compared with STM8L101K3T6, STM8L051F3P6 reduces memory and peripheral count for cost-sensitive volume production, while EFM8LB12F32ES1 offers deeper sleep and richer analog resources at the expense of ecosystem divergence and higher unit cost.
Availability
STM8L101K3T6 is available at Aetrix Electronics and suitable for battery-powered sensor nodes, infrared remote transmitters, industrial asset monitors, and energy-harvesting environmental sensors requiring stable component supply over extended product lifecycles.
Supply support for STM8L101K3T6 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.
The STM8L series targets ultra-low-power embedded applications where energy efficiency, small footprint, and robustness in wide temperature ranges are critical - especially in metering, wearables, and wireless sensor networks.
FAQ
Does STM8L101K3T6 support in-application programming (IAP) of Flash memory?
Yes. The device supports full in-application programming of Flash and data EEPROM via its built-in bootloader, allowing firmware updates over USART or custom protocols without external programmer. IAP requires careful handling of interrupt masking and Flash wait states during write/erase operations per Section 3.5 of DocID15275 Rev 16.
What is the maximum sink current capability of PA0 in LED driver mode?
PA0 delivers up to 20 mA sink current at VDD = 3.0 V with VOL ≤ 0.4 V, verified per Table 29 and Figure 29 in the datasheet. This enables direct drive of standard infrared LEDs without external transistor, provided thermal limits (Tj ≤ 125 °C) are observed under continuous operation.
Can the 38 kHz LSI 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). System clock must derive from the 16 MHz HSI, external crystal, or PLL - confirmed in Section 3.8 "Clock control" and Table 23 of the datasheet.
Is the 96-bit unique ID accessible via standard memory-mapped registers?
Yes. The 96-bit unique ID is located at memory addresses 0x4865–0x486A and readable via standard LD/ST instructions without special unlock sequences. It is factory-programmed and immutable, intended for secure device identification and anti-cloning in firmware authentication schemes.
STM8L101K3T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- 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:
- 30
- 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:
STM8L101K3T6 FAQ
1.How can I place an order for STM8L101K3T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8L101K3T6 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 STM8L101K3T6 reliable?
The price and inventory of STM8L101K3T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8L101K3T6 is usually 5 days.
3.What payment methods are accepted for STM8L101K3T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8L101K3T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8L101K3T6?
STM8L101K3T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8L101K3T6 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 STM8L101K3T6?
For technical support, including STM8L101K3T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8L101K3T6 requirements.
6.How does Aetrix verify that STM8L101K3T6 is sourced from the original manufacturer or authorized distributors?
All STM8L101K3T6 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 STM8L101K3T6 meets industry standards.
7.What is the process for return or replacement of STM8L101K3T6?
All STM8L101K3T6 units undergo pre-shipment inspection (PSI). If there is an issue with STM8L101K3T6, 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 STM8L101K3T6 part is unused and in its original packaging.
Return procedure for STM8L101K3T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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