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STMicroelectronics STM8AL3146TCY — Microcontrollers & Processors (MCU / MPU / DSP)

STM8AL3146TCY 8-bit MCU, AEC-Q100, 16 MHz, 16 KB Flash

MPNSTM8AL3146TCY
NRND

STMicroelectronics STM8AL3146TCY, Automotive AEC-Q100 STM8A series, 8-bit MCU, 16 MHz, 16 KB Flash, 2K x 8 RAM, 1K x 8 EEPROM, 22x12b A/D + 1x12b D/A, 1.65 V to 3.6 V, -40 to 125 °C, 32-LQFP (7x7 mm), Tray.

$2.0069Ref. price · indicative, final on quote
STMicroelectronics STM8AL3146TCY datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

STM8AL3146TCY 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~125°C(TA)
Speed16MHz
PackageTray
RAM size2K x 8
Core size8-Bit
EEPROM size1K x 8
PeripheralsBrown-out Detect/Reset, DMA, POR, PWM, WDT
ConnectivityI²C, IrDA, LINbus, SPI, UART/USART
Number of i (O)30
Core processorSTM8
Case32-LQFP
Data convertersA/D 22x12b; D/A 1x12b
Program memory size16KB (16K x 8)

Product details

What this 8-bit MCU brings to an automotive ECU

The STMicroelectronics STM8AL3146TCY is an 8-bit MCU, AEC-Q100 qualified and specified across -40 to 125 °C. It runs at 16 MHz from an internal oscillator, carries 16 KB Flash and 1 KB EEPROM, and integrates a 22-channel 12-bit ADC plus one 12-bit DAC.

This is not an immediate EOL — ST still supports existing production — but the part is no longer targeted for new program wins. For a BOM freeze on an existing ECU, this means the last-time-buy window is open; secure the volume you need for the remaining production run.

16 MHz core and 16 KB Flash — sizing the node

16 MHz on an 8-bit core is adequate for LIN-bus polling, window-lift logic, or seat-position memory — not for high-rate sensor fusion or motor-field control. The 16 KB Flash and 2 KB RAM suit a compact firmware image with a small RTOS or a state-machine loop. The 1 KB EEPROM holds calibration constants or fault codes without external storage.

32-LQFP footprint and supply range

Housed in a 32-LQFP (7x7 mm), surface-mount.

Frequently asked questions

What compliance documentation does ST provide for STM8AL3146TCY?

As an AEC-Q100 qualified automotive part, ST provides a PPAP (Production Part Approval Process) package and AEC-Q100 qualification report through their standard automotive documentation channel. RoHS and REACH compliance declarations are available from ST's compliance portal. Confirm the specific PPAP level with your ST field application engineer.