STMicroelectronics STM8L101G3U6A

Overview

STM8L101G3U6A from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 8 Kbytes Flash, 1.5 Kbytes SRAM, and integrated peripherals including two 16-bit timers, USART, SPI, I²C, two comparators, and infrared (IR) 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 - deployed in battery-powered sensor nodes and portable medical devices.

For engineers reviewing the STM8L101G3U6A datasheet, STM8L101G3U6A pinout, STM8L101G3U6A application, or STM8L101G3U6A equivalent, key selection criteria include ultra-low-power Halt mode (0.3 µA), SWIM debug interface, IR remote control capability, and UFQFPN28 package compatibility with space-constrained PCB layouts.

Technical Context

The STM8L101G3U6A implements a CISC-based STM8 core delivering up to 16 MIPS at 16 MHz, with dual internal oscillators: a 16 MHz high-speed RC (HSI) for active operation and a 38 kHz low-speed RC (LSI) for independent watchdog and auto-wakeup unit timing. Its interrupt controller supports nested priority handling across up to 29 external sources.

Memory architecture includes ECC-protected Flash with in-application programming, 2 Kbytes of data EEPROM, and flexible read/write protection. Low-power modes - Wait, Active-halt, and Halt - are managed via dedicated voltage regulators and POR/PDR circuitry optimized for sub-1 µA quiescent current in deep sleep.

Key Specifications

Pinout & Package

STM8L101G3U6A is housed in a 28-pin Ultra Thin Fine Pitch Quad Flat No-lead (UFQFPN28) package, 4 × 4 mm body, 0.5 mm pitch, with exposed thermal pad. Pin mapping follows standard STM8L101x3 configuration per Figure 6 of DocID15275 Rev 16.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L101G3U6A, STM8L051F3P6 trades IR capability and EEPROM for lower BOM cost and simpler packaging, while EFM8LB12F32ES1-B-QFN24 offers greater memory and USB but requires external IR driver circuitry and consumes more power in active mode.

Availability

STM8L101G3U6A is available at Aetrix Electronics and suitable for battery-powered sensor nodes, portable medical monitors, and infrared remote controls requiring stable component supply and long-term manufacturability.

Supply support for STM8L101G3U6A 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 targets ultra-low-power embedded applications, emphasizing energy efficiency, robustness in harsh environments, and rapid time-to-market for battery-operated IoT endpoints and industrial controls.

FAQ

What debug interface does STM8L101G3U6A support?

STM8L101G3U6A uses the Single Wire Interface Module (SWIM), a proprietary ST protocol enabling full in-circuit programming and non-intrusive debugging over one dedicated pin. It supports breakpoints, register inspection, and flash erase/write operations without halting real-time peripherals.

Does STM8L101G3U6A include hardware CRC or ECC for memory?

Yes - the device integrates Error Correction Code (ECC) logic for Flash memory, detecting and correcting single-bit errors automatically during read operations. This feature enhances reliability in long-life deployments where radiation-induced bit flips or wear-out effects may occur.

Can PA0 drive an infrared LED directly without external components?

Yes - PA0 is specified as a high-sink LED driver capable of delivering up to 20 mA at VDD ≥ 2.4 V. When configured in IR mode, it generates the 38 kHz carrier and modulates NEC/RC5 data frames internally, eliminating the need for external transistor or driver IC.

What is the maximum operating frequency and corresponding current draw?

The STM8L101G3U6A runs at up to 16 MHz using its internal 16 MHz RC oscillator. At 16 MHz and 3.0 V, typical active current is 2.4 mA (150 µA/MHz × 16 MHz), verified in Table 18 of the datasheet under dynamic run conditions with all peripherals disabled.