STMicroelectronics STM8AL3188TAY

Overview

STM8AL3188TAY 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 vehicle body control modules requiring extended sleep duration and precise timekeeping.

For engineers reviewing the STM8AL3188TAY datasheet, STM8AL3188TAY pinout, STM8AL3188TAY application, or STM8AL3188TAY equivalent, key selection criteria include low-power mode current (400 nA Halt, 1.4 µA Active-halt with RTC), 67 I/O count with interrupt mapping, LQFP48 package compatibility, and automotive-grade reset/supply management with 5 BOR thresholds.

Technical Context

The STM8AL3188TAY 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 RC, and clock security system for fault detection.

Power architecture includes five configurable low-power modes: Wait (200 µA/MHz + 330 µA), Low-power Run (5.9 µA), Low-power Wait (3 µA), Active-halt with full RTC (1.4 µA), and Halt (400 nA), with 4.7 µs wake-up latency from Halt. I/O leakage is specified at ≤50 nA per pin under power-down conditions.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), RoHS-compliant, with 48 leads arranged in quad flat configuration. Pin functions validated per STM8AL3188 48-pin pinout diagram (Figure 7, DocID027179 Rev 7).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8AL3L88TAY, the STM8AL3188TAY removes LCD hardware to reduce cost and power in non-display applications; versus RL78/F13-GB, it delivers 10× lower Halt current and integrated RTC calibration - critical for battery-backed telematics loggers and smart junction boxes.

Availability

STM8AL3188TAY is available at Aetrix Electronics and suitable for automotive body control modules, smart door lock systems, HVAC displays, and engine bay sensor hubs requiring stable component supply across extended product lifecycles.

Supply support for STM8AL3188TAY 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 STM8AL ultra-low-power 8-bit MCU family targets automotive body electronics and chassis applications demanding AEC-Q100 qualification, extended temperature operation, and multi-year battery life - with emphasis on minimizing active and standby current without sacrificing peripheral richness.

FAQ

What is the maximum operating frequency and core performance of the STM8AL3188TAY?

The STM8AL3188TAY operates at up to 16 MHz with its STM8 8-bit Harvard core, achieving 16 CISC MIPS peak performance. It uses a 3-stage pipeline and supports up to 40 external interrupt sources. The core is optimized for deterministic real-time execution in automotive control loops, with instruction cycle times directly tied to clock frequency - e.g., 62.5 ns per cycle at 16 MHz.

Does the STM8AL3188TAY support LIN 2.0 communication, and how is it implemented?

Yes, the STM8AL3188TAY supports LIN 2.0 via its three hardware USARTs, each with dedicated LIN break detection, sync field handling, and checksum calculation. The USARTs operate in LIN master or slave mode with automatic baud rate adaptation and wakeup-on-header detection - enabling seamless integration into vehicle body networks without external transceivers or software bit-banging.

What are the low-power mode current specifications, and how does Halt mode compare to Active-halt?

Halt mode draws 400 nA at VDD = 1.65–3.6 V with all clocks stopped except optional LSE for RTC backup; Active-halt draws 1.4 µA while maintaining full RTC functionality including calendar, alarm, and tamper detection. Both modes support 4.7 µs wake-up latency, but Active-halt retains real-time context essential for event-logged systems like telematics gateways.

Is the STM8AL3188TAY pin-compatible with other members of the STM8AL3x8x family?

No - the STM8AL3188TAY uses LQFP48 packaging (7×7 mm), while STM8AL3189 is LQFP64 and STM8AL318A is LQFP80. Pinouts differ across packages due to I/O count variation (48 vs. 64 vs. 80 pins) and functional allocation (e.g., LCD pins present only in LQFP64/LQFP80 variants). Migration requires PCB redesign and signal remapping.