STMicroelectronics STM8AL3LE88TAY

Overview

STM8AL3LE88TAY from STMicroelectronics is an AEC-Q100 Grade 1 qualified automotive 8-bit ultra-low-power MCU featuring 64 KB Flash, 2 KB data EEPROM with ECC, RTC with ±0.5 ppm digital calibration, LCD controller (8×40/4×44), dual 12-bit DACs, 12-bit ADC (1 Msps, 28 channels), and two ultra-low-power comparators - deployed in battery-powered instrument clusters and body control modules requiring extended sleep autonomy.

For engineers reviewing the STM8AL3LE88TAY datasheet, STM8AL3LE88TAY pinout, STM8AL3LE88TAY application, or STM8AL3LE88TAY equivalent, key selection criteria include low-power mode current (down to 400 nA in Halt), 1.65–3.6 V operating range, LQFP80 package compatibility, and integrated AES-128 for secure firmware updates in automotive ECUs.

Technical Context

The STM8AL3LE88TAY 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 RC, and clock security system for fail-safe operation.

Power management includes five programmable low-power modes - including Active-halt with full RTC (1.4 µA) and Halt (400 nA) - enabled by ultra-low-leakage I/Os (50 nA per pin) and fast wake-up (4.7 µs from Halt). The embedded reset block features 5-programmable BOR thresholds and PVD for robust supply monitoring.

Key Specifications

Pinout & Package

LQFP80 package (14 × 14 mm, 0.5 mm pitch), RoHS-compliant, rated for automotive temperature range (-40 to +125 °C).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8AL3LE88TAY, STM8AL31E88TAY removes LCD capability while retaining identical power, security, and analog features - making it optimal for non-display ECUs; RL78/F14 offers lower standby current but lacks AES, RTC calibration, and dual DACs needed for secure, high-precision automotive control.

Availability

STM8AL3LE88TAY is available at Aetrix Electronics and suitable for automotive instrument clusters, body control modules, and engine bay sensor nodes requiring stable component supply across extended product lifecycles.

Supply support for STM8AL3LE88TAY 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.

The STM8AL ultra-low-power family targets automotive body electronics and instrument clusters, emphasizing AEC-Q100 compliance, sub-microamp sleep modes, and integrated analog peripherals to reduce system-level BOM count and power consumption.

FAQ

What is the maximum operating frequency and core architecture of the STM8AL3LE88TAY?

The STM8AL3LE88TAY features an 8-bit STM8 core with Harvard architecture and 3-stage pipeline, achieving a maximum operating frequency of 16 MHz and peak performance of 16 CISC MIPS. It supports up to 40 external interrupt sources and includes dedicated hardware for AES-128 encryption acceleration, enabling deterministic real-time execution in automotive control loops.

Does the STM8AL3LE88TAY support hardware-based AES encryption?

Yes, the STM8AL3LE88TAY integrates a dedicated AES-128 hardware accelerator compliant with FIPS-197, enabling full encryption/decryption operations without CPU intervention. This reduces firmware update latency and improves security posture in OTA-capable ECUs, with key storage supported via protected option bytes and ECC-protected EEPROM.

What are the low-power mode current specifications and wake-up times?

The STM8AL3LE88TAY offers five low-power modes: Halt (400 nA), Active-halt with RTC (1.4 µA), Low-power wait (3 µA), Low-power run (5.9 µA), and Wait mode. Wake-up from Halt occurs in 4.7 µs, and all 67 GPIOs support wake-on-event with ultra-low leakage (50 nA per I/O), enabling decade-long battery operation in always-on vehicle subsystems.

Is the STM8AL3LE88TAY pin-compatible with other devices in the STM8AL3xE8x family?

The STM8AL3LE88TAY in LQFP80 package shares identical pinout with STM8AL31E88TAY and STM8AL3LE89TAY (LQFP64) for corresponding signal groups, but LCD segment pins are unique to the 'L' variant. Pin mapping must be verified per package variant using Figures 3–4 in DocID027180 Rev 5; no drop-in replacement is guaranteed without layout review due to LCD pin allocation differences.