STMicroelectronics STM8L101G2U6A

Overview

STM8L101G2U6A from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 4 Kbytes Flash, 1.5 Kbytes RAM, and integrated peripherals including two 16-bit timers, USART, SPI, I²C, two comparators, infrared interface, and a beeper timer. 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 - ideal for battery-powered sensor nodes and portable medical devices.

For engineers reviewing the STM8L101G2U6A datasheet, STM8L101G2U6A pinout, STM8L101G2U6A application, or STM8L101G2U6A equivalent, key selection criteria include ultra-low-power sleep modes (Halt/Active-halt), integrated IR transmitter capability, high-sink LED driver on PA0, SWIM debug interface, and 28-pin UFQFPN (4 × 4 mm) package compatibility with space-constrained PCB layouts.

Technical Context

The STM8L101G2U6A implements the STM8 CISC core delivering up to 16 MIPS at 16 MHz, supported by dual internal oscillators: a 16 MHz high-speed RC (HSI) with 4 µs wakeup and a 38 kHz low-power RC (LSI) for independent watchdog and auto-wakeup unit timing. Its nested interrupt controller supports up to 29 external sources with software-configurable priority.

Memory architecture includes ECC-protected Flash (4 Kbytes), data EEPROM (up to 2 Kbytes), and 1.5 Kbytes of static RAM. Peripheral integration centers on low-power operation: all I/Os support programmable pull-ups, high sink/source drive (20 mA on PA0), and mapping to external interrupt vectors - enabling direct wake-from-Halt via GPIO events.

Key Specifications

Pinout & Package

STM8L101G2U6A is housed in a 28-pin UFQFPN package (4 × 4 mm, 0.5 mm pitch), optimized for high-density PCB layouts and automated assembly. Pin 1 marked by top-side dot; thermal pad exposed on underside for enhanced heat dissipation in sealed enclosures.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-power 8-bit microcontroller applications.

Compared with STM8L051F3P6, the STM8L101G2U6A delivers IR transmission and EEPROM persistence at identical voltage/power specs; versus EFM8LB12F32ES1, it trades USB and larger memory for smaller 28-pin footprint and lower system-level component count in cost-sensitive remote control designs.

Availability

STM8L101G2U6A is available at Aetrix Electronics and suitable for battery-powered remote controls, portable medical sensors, industrial wireless sensor nodes, and asset tracking beacons requiring stable component supply and long-term manufacturability.

Supply support for STM8L101G2U6A 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 STM8L ultra-low-power MCUs were developed specifically for energy-constrained applications demanding multi-year battery life, robust operation across extended temperature ranges, and minimal external component count - targeting wearables, metering, and industrial IoT endpoints.

FAQ

Does STM8L101G2U6A support in-application programming (IAP) of Flash memory?

Yes. The device supports full in-application programming via its embedded bootloader and SWIM interface. Flash sectors can be erased and rewritten while the application runs, enabling field firmware updates without external programmers. Write endurance is rated at 10,000 cycles with data retention exceeding 20 years at 85 °C.

What is the maximum clock frequency achievable with the internal 16 MHz RC oscillator?

The internal high-speed RC (HSI) oscillator is factory-trimmed to ±2% accuracy at 25 °C and 3.0 V, supporting sustained 16 MHz operation across the full 1.65–3.6 V supply range and –40 °C to +85 °C temperature range. No external crystal is required for timing-critical applications where ±2% tolerance is acceptable.

Can PA0 be used simultaneously as both a general-purpose I/O and an infrared output?

No. PA0 serves as the dedicated infrared output channel when the IR peripheral is enabled. In that mode, it is hardware-driven at 38 kHz and cannot be configured as a standard GPIO. When IR is disabled, PA0 reverts to a high-sink (20 mA) general-purpose I/O with programmable pull-up and interrupt capability.

Is the 28-pin UFQFPN package RoHS-compliant and lead-free?

Yes. STM8L101G2U6A is manufactured in full compliance with EU RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. The UFQFPN28 package uses lead-free matte tin finish on terminals and halogen-free molding compound, qualified for lead-free reflow soldering per JEDEC J-STD-020.