STMicroelectronics STM8AL3188TCY

Overview

STM8AL3188TCY from STMicroelectronics is an AEC-Q100 Grade 1 qualified automotive 8-bit ultra-low-power microcontroller featuring 64 Kbytes Flash, 4 Kbytes RAM, RTC with ±0.5 ppm digital calibration, 12-bit ADC (1 Msps, 28 channels), dual 12-bit DACs, two ultra-low-power comparators, LCD controller (8×40), and three USARTs supporting LIN 2.0 and IrDA - deployed in battery-powered instrument clusters and body control modules.

For engineers reviewing the STM8AL3188TCY datasheet, STM8AL3188TCY pinout, STM8AL3188TCY application, or STM8AL3188TCY equivalent, this page delivers verified technical context, low-power mode timing, RTC accuracy, ADC/DAC performance specs, and automotive-grade supply management details critical for functional safety and energy-constrained designs.

Technical Context

The STM8AL3188TCY implements a Harvard-architecture STM8 core with 3-stage pipeline, delivering 16 CISC MIPS at 16 MHz max frequency and supporting up to 40 external interrupt sources. Its clock system integrates dual crystal oscillators (32 kHz LSE + 1–16 MHz HSE), factory-trimmed 16 MHz HSI and 38 kHz LSI RC sources, plus clock security system for fault detection.

Power architecture includes five configurable low-power modes: Low-power run (5.9 µA), Low-power wait (3 µA), Active-halt with full RTC (1.4 µA), Halt (400 nA), and Wait - all enabled by programmable BOR with five thresholds, ultra-low-power POR/PDR, and PVD. RTC operates independently in Active-halt with BCD calendar, alarm, anti-tamper detection, and digital calibration.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, with 48 pins including 42 I/Os (all mappable to interrupt vectors), dedicated SWIM debug interface, and NRST with Schmitt-trigger input.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive microcontroller applications.

Compared with STM8AL3L88TCY, the STM8AL3188TCY omits LCD driver circuitry - reducing die size and cost for non-display applications; versus RL78/F13, it delivers certified automotive timing precision and ultra-low standby leakage critical for battery-backed systems.

Availability

STM8AL3188TCY is available at Aetrix Electronics and suitable for automotive instrument clusters, body control modules, and tire pressure monitoring systems requiring stable component supply across extended product lifecycles.

Supply support for STM8AL3188TCY 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 silicon for industrial and transportation markets.

The STM8AL3x8x product line targets ultra-low-power automotive applications demanding AEC-Q100 qualification, extended temperature operation, and integrated analog peripherals - optimized for battery-backed and thermally constrained environments.

FAQ

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

The STM8AL3188TCY operates up to 16 MHz with typical current consumption of 200 µA/MHz + 330 µA at VDD = 3.3 V and 25 °C. At full speed, total active current is approximately 3.53 mA - measured with all peripherals disabled and code executing from Flash. This value scales linearly with frequency and increases with peripheral activation (e.g., +120 µA for active USART).

Does the device support hardware-based LIN 2.0 communication without external transceivers?

No - the STM8AL3188TCY integrates LIN protocol framing and checksum generation in its USART peripherals but requires an external LIN transceiver (e.g., TLE7259-3GE) for physical layer signaling. The USARTs provide break detection, sync field handling, and identifier filtering per LIN 2.0 specification, enabling full protocol stack offload in software.

How is RTC accuracy maintained during voltage brownout or temperature variation?

RTC accuracy is preserved via digital calibration against the 32.768 kHz LSE crystal, achieving ±0.5 ppm stability across −40 °C to +85 °C. During brownout, the independent power domain (VDDA) and backup register retention ensure RTC continues running; calibration coefficients remain valid because LSE frequency drift is compensated in firmware using stored trim values.

Can the dual DAC outputs drive external loads directly, and what is their output impedance?

Yes - both 12-bit DACs include integrated rail-to-rail output buffers capable of sourcing/sinking ±5 mA at VDD = 3.3 V. Output impedance is <1 Ω (typical) within 100 mV of supply rails, enabling direct connection to LED anodes, op-amp inputs, or low-impedance actuators without external buffering. Maximum load capacitance is 100 pF for stable settling.