STMicroelectronics STM8L152R8T3

Overview

STM8L152R8T3 from STMicroelectronics is an 8-bit ultra-low-power microcontroller featuring 64 KB Flash, 2 KB data EEPROM, integrated RTC with ±0.5 ppm accuracy, 12-bit ADC (1 Msps, 28 channels), dual 12-bit DACs, LCD controller (8×40), and 67 I/Os in LQFP64 package. It operates from 1.65–3.6 V across –40 to +85 °C and targets battery-powered metering, portable medical devices, and smart sensors requiring long runtime and precise timing.

For engineers reviewing the STM8L152R8T3 datasheet, STM8L152R8T3 pinout, STM8L152R8T3 application, or STM8L152R8T3 equivalent, key selection criteria include ultra-low-power run mode (5.9 µA), Halt-mode current (400 nA), on-chip LCD driver support, dual DAC output buffering, and SWIM-based non-intrusive debugging capability.

Technical Context

The STM8L152R8T3 implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz. Its clock system integrates dual crystal oscillators (32 kHz LSE + 1–16 MHz HSE), factory-trimmed 16 MHz RC, and clock security system for fail-safe operation.

Power management includes five configurable low-power modes, programmable BOR thresholds, PVD, and ultra-low leakage I/Os (50 nA). The peripheral set features three 16-bit timers (including advanced control timer TIM1 for motor control), DMA with 4 channels, and three USARTs supporting ISO 7816 and IrDA protocols.

Key Specifications

Pinout & Package

LQFP64 (10 × 10 mm, 0.5 mm pitch) package with exposed thermal pad; RoHS-compliant, industrial-grade reflow profile.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8L152C8T6, the STM8L152R8T3 provides full LCD integration and 23 additional I/Os for expanded sensor/actuator interfacing; versus STM32L053R8T6, it delivers superior sub-µA deep-sleep efficiency and lower BOM cost for 8-bit deterministic control tasks.

Availability

STM8L152R8T3 is available at Aetrix Electronics and suitable for smart utility metering, portable medical sensors, and industrial wireless sensor nodes requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for STM8L152R8T3 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 8-bit MCU family targets battery-operated and energy-harvesting applications where nanowatt-level sleep current, integrated peripherals (RTC, LCD, touch), and cost-sensitive design are primary constraints.

FAQ

What is the maximum operating frequency and corresponding power consumption in active mode?

The STM8L152R8T3 achieves a maximum clock frequency of 16 MHz. At this speed and 3.0 V supply, typical active-mode current is 200 µA/MHz plus 330 µA base consumption - totaling approximately 3.53 mA. This value is confirmed in Section 9.3.3 of DS6948 Rev 11, Table 20, under VDD = 3.0 V and fCPU = 16 MHz conditions.

Does the device support hardware-accelerated capacitive touch sensing, and how many channels are available?

Yes, the STM8L152R8T3 integrates a dedicated capacitive sensing controller supporting up to 16 channels. It enables touchkey, proximity, linear slider, and rotary touch applications without external components or CPU intervention, as documented in Section 3.13 and Table 2 of DS6948 Rev 11.

Can the internal RTC operate independently during Halt mode, and what is its accuracy specification?

Yes, the RTC remains fully functional in Active-Halt mode with LSE crystal clocking, consuming just 1.4 µA. Its digital calibration achieves ±0.5 ppm accuracy over temperature and voltage ranges, as specified in Section 3.5 and Table 25 of DS6948 Rev 11 - eliminating need for external compensation.

Is SWIM debugging supported, and does it require additional pins beyond the standard programming interface?

Yes, SWIM (Single-Wire Interface Module) enables non-intrusive programming and real-time debugging using only the SWIM pin (PB4) and NRST - no dedicated debug port or extra pins required. This is verified in Section 3.19 and Figure 23 of DS6948 Rev 11, confirming full debug visibility without impacting GPIO count.