STMicroelectronics STM8L101K3T6TR

Overview

STM8L101K3T6TR 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, infrared interface, and a beeper timer. 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 STM8L101K3T6TR datasheet, STM8L101K3T6TR pinout, STM8L101K3T6TR application, or STM8L101K3T6TR equivalent, key selection criteria include ultra-low power Halt mode (0.3 µA), SWIM debug interface, IR remote control capability, and UFQFPN32 package compatibility with space-constrained PCB layouts.

Technical Context

The STM8L101K3T6TR implements a CISC-based STM8 core delivering up to 16 MIPS at 16 MHz, supported by dual internal RC oscillators: a 16 MHz high-speed oscillator (HSI) with 4 µs wakeup and a 38 kHz low-power oscillator (LSI) for independent watchdog and auto-wakeup unit timing. Its nested interrupt controller supports 29 external sources with software-configurable priority.

Memory architecture includes ECC-protected Flash with in-application programming, 2 Kbytes of emulated data EEPROM, and 1.5 Kbytes of static RAM. Power management integrates three low-power modes (Wait, Active-halt, Halt), POR/PDR circuitry, and voltage regulator enabling stable operation down to 1.65 V.

Key Specifications

Pinout & Package

STM8L101K3T6TR is housed in a 32-pin UFQFPN (5 × 5 mm, 0.5 mm pitch) package with exposed thermal pad, optimized for compact, thermally efficient PCB layouts in wearables and IoT endpoints.

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, STM8L101K3T6TR offers double Flash, IR hardware, and beeper - critical for remote-centric designs; versus EFM8LB12F32ES1-QFP32, it trades memory headroom for lower active current and ST's long-term industrial support commitment.

Availability

STM8L101K3T6TR is available at Aetrix Electronics and suitable for battery-powered sensor nodes, portable medical monitors, infrared remote transmitters, and industrial panel indicators requiring stable component supply and long-lifecycle assurance.

Supply support for STM8L101K3T6TR 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 semiconductors since 1987.

The STM8L series targets ultra-low-power embedded applications where energy efficiency, small footprint, and robustness across wide temperature ranges are essential - especially in metering, wearables, and industrial monitoring.

FAQ

What is the maximum operating frequency of the STM8L101K3T6TR?

The STM8L101K3T6TR runs at up to 16 MHz using its internal 16 MHz RC oscillator (HSI), which achieves typical accuracy of ±1% over temperature and supply voltage. External crystal support is not provided - all timing derives from calibrated internal oscillators.

Does the STM8L101K3T6TR support hardware encryption or secure boot?

No. The STM8L101K3T6TR does not include hardware cryptographic accelerators, secure boot ROM, or tamper-detection circuitry. Security relies on software-implemented algorithms and option byte protection for Flash and EEPROM - suitable for basic authentication but not certified secure applications.

Can the STM8L101K3T6TR drive an infrared LED directly without external components?

Yes. Pin PA0 is specifically designed as a high-sink LED driver capable of sourcing up to 20 mA, enabling direct connection of standard IR LEDs (e.g., Vishay TSAL6100) with only a series resistor - no transistor or driver IC needed.

Is the UFQFPN32 package of the STM8L101K3T6TR RoHS and REACH compliant?

Yes. STM8L101K3T6TR is manufactured in STMicroelectronics' fully qualified green facilities and meets RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006, including SVHC screening. Full compliance documentation is available via ST's Quality & Reliability portal.