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STMicroelectronics STM8AL31E88TAY — Microcontrollers & Processors (MCU / MPU / DSP)

ST STM8AL31E88TAY 8-bit MCU, 16 MHz, 64 KB Flash, AEC-Q100

MPNSTM8AL31E88TAY
NRND

ST STM8A series 8-bit MCU, STM8 core, 16 MHz, 64 KB Flash, 4K x 8 RAM, 2K x 8 EEPROM, 41 I/O, 25x12b ADC, 2x12b DAC, 1.65V–3.6V, -40°C to 85°C, 48-LQFP, AEC-Q100, Tray.

$2.5305Ref. price · indicative, final on quote
STMicroelectronics STM8AL31E88TAY datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM8AL31E88TAY specifications
ParameterValue
SeriesAutomotive, AEC-Q100, STM8A
MountingSurface Mount
Oscillator typeInternal
Program memory typeFLASH
Voltage - supply (Vcc (Vdd))1.65V ~ 3.6V
Operating temperature-40°C ~ 85°C (TA)
Speed16MHz
PackageTray
RAM size4K x 8
Core size8-Bit
EEPROM size2K x 8
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)41
Core processorSTM8
Case48-LQFP
Data convertersA/D 25x12b; D/A 2x12b
Program memory size64KB (64K x 8)

Product details

The STM8AL31E88TAY is an 8-bit automotive MCU with STM8 core at 16 MHz. It has 64 KB Flash, 4 KB RAM, and 2 KB EEPROM.

At 16 MHz the STM8 core executes most instructions in one or two clock cycles. The 64 KB Flash and 4 KB RAM support a single firmware image.

Analog integration saves board space

With 25 analog input channels on the 12-bit ADC and two 12-bit DAC outputs, this MCU can read a dozen temperature or pressure sensors and drive two analog actuators directly. The 48-LQFP package (7x7 mm) leaves room for the passives and protection diodes on a compact automotive PCB.

Frequently asked questions

Is STM8AL31E88TAY obsolete or NRND?

Yes, the STM8AL31E88TAY is listed as Not Recommended for New Designs (NRND). It is not yet fully discontinued, but ST is phasing it out. For new projects, select a current-production STM8A or STM8L alternative.

What is the replacement for STM8AL31E88TAY?

ST has not published a direct pin-compatible successor for the STM8AL31E88TAY. The closest current-production alternatives are other STM8A or STM8L devices in the 48-LQFP package with similar Flash and peripheral sets — verify pin compatibility against the target application's requirements.

What is the operating voltage of STM8AL31E88TAY?

The supply voltage range is 1.65 V to 3.6 V, covering single Li-ion cell operation and standard 1.8 V or 3.3 V rails.

What is the pinout of STM8AL31E88TAY?

The part is in a 48-LQFP package with 41 I/O pins. The exact pinout is in the STM8AL31xx datasheet — we recommend downloading it from ST's website for the full pin assignment and alternate-function mapping.