STMicroelectronics STM8L151C6T6

Overview

STM8L151C6T6 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 32 KB Flash, 1 KB Data EEPROM with ECC, 2 KB RAM, 12-bit ADC (1 Msps, 25 channels), 12-bit DAC, two ultra-low-power comparators, RTC with BCD calendar, and up to 41 I/Os. It operates from 1.65 V to 3.6 V across –40 °C to +85 °C and targets battery-powered sensor nodes and portable medical devices requiring sub-µA halt-mode operation.

For engineers reviewing the STM8L151C6T6 datasheet, STM8L151C6T6 pinout, STM8L151C6T6 application, or STM8L151C6T6 equivalent, key selection criteria include active-halt current (1.3 µA), wakeup time from Halt (4.7 µs), 96-bit unique ID, SWIM debug interface, and support for capacitive touch sensing on up to 16 channels.

Technical Context

The STM8L151C6T6 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. It integrates dual clock domains: high-speed (1–16 MHz HSE or 16 MHz factory-trimmed HSI) and low-power (32 kHz LSE or 38 kHz LSI), managed by a clock security system with fail-safe detection.

Its power architecture supports five distinct low-power modes-Wait, Low Power Run (5.1 µA), Low Power Wait (3 µA), Active-Halt with RTC (1.3 µA), and Halt (350 nA)-with per-I/O leakage as low as 50 nA and fast wake-up via external interrupt, RTC alarm, or comparator event.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad. Pin count and function mapping align with STM8L151C4/C6 device family; no LCD controller included.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L052C6T6, the STM8L151C6T6 adds DAC, temperature sensor, and ECC memory-justifying its use in calibrated measurement systems. Against EFM8LB12F32ES1, it delivers superior RTC-integrated ultra-low-power operation essential for time-synchronized edge devices.

Availability

STM8L151C6T6 is available at Aetrix Electronics and suitable for smart utility metering, portable medical devices, industrial sensor nodes, and asset tracking beacons requiring stable component supply across extended product lifecycles.

Supply support for STM8L151C6T6 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 analog products for industrial, automotive, and consumer markets.

The STM8L ultra-low-power MCU product line targets energy-constrained applications such as battery-operated meters, wearables, and IoT edge nodes-prioritizing sub-µA sleep modes, fast wake-up, and integrated analog peripherals to minimize external components.

FAQ

What is the minimum operating voltage for STM8L151C6T6 in Halt mode?

The STM8L151C6T6 supports Halt mode operation down to 1.65 V, with specified 350 nA current consumption at that voltage. Below 1.65 V, the device enters power-down state and retains RAM contents only if VDD remains above the brown-out reset threshold (configurable from 1.62 V to 2.55 V).

Does STM8L151C6T6 support hardware-accelerated AES encryption?

No. The STM8L151C6T6 does not include cryptographic accelerators or hardware AES engines. It relies on software libraries for encryption; secure boot and memory protection are implemented via option bytes and read-out protection-not cryptographic acceleration.

Can the 12-bit DAC output drive a 1 kΩ load directly?

Yes. The integrated 12-bit DAC features an output buffer capable of sourcing/sinking ±5 mA, enabling direct driving of 1 kΩ loads with full-scale linearity maintained. Output is available on PB4, PB5, or PB6, configurable via DAC_CR register.

Is SWIM debugging compatible with production firmware updates in the field?

Yes. SWIM supports in-system programming (ISP) via USART bootloader or direct SWIM interface, allowing field firmware updates without removing the MCU. Production units retain SWIM functionality unless disabled via option byte configuration-enabling secure, post-deployment maintenance.