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Home > Products > Integrated Circuits (ICs) > Embedded > Microcontrollers

STMicroelectronics STM8AF62A6UDX

Name: STM8AF62A6UDX
Brand: STMicroelectronics
SKU: STM8AF62A6UDX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM8AF62A6UDX

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 32-VFQFN Exposed Pad

Datasheet:: STM8AF62A6UDX.pdf

Description:: IC MCU 8BIT 128KB FLASH 32VFQFPN

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Product details

Overview

STM8AF62A6UDX from STMicroelectronics is an AEC-Q100 Grade 0 qualified automotive 8-bit microcontroller featuring a 24 MHz STM8A core, 128 Kbyte Flash program memory with 20-year data retention at 55 °C, 2 Kbyte true data EEPROM (300 kcycle endurance), and integrated CAN 2.0B interface operating up to 1 Mbit/s - deployed in engine control units for real-time sensor signal acquisition and actuator command execution.

For engineers reviewing the STM8AF62A6UDX datasheet, STM8AF62A6UDX pinout, STM8AF62A6UDX application, or STM8AF62A6UDX equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and power specifications, and confirmed alternative MCU options for ECU and body control module design.

Technical Context

The STM8AF62A6UDX implements a Harvard-architecture STM8A CPU with 3-stage pipeline and average 1.6 cycles/instruction throughput, enabling 10 MIPS at 16 MHz. It integrates dual clock sources: user-trimmable 16 MHz RC oscillator and low-power 128 kHz RC oscillator, both monitored by a dedicated clock security system (CSS) with failover detection.

Its peripheral set includes a 10-bit ADC with ±2 LSB total unadjusted error and 1 LSB linearity across up to 16 channels, two 16-bit general-purpose timers (each with up to 3 CAPCOM channels), and an advanced control timer supporting dead-time insertion, complementary outputs, and flexible synchronization - all operating reliably across −40 °C to +150 °C ambient.

Key Specifications

Parameter	Value and Actual Design Meaning
Core Architecture	STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic 1.6-cycle avg. instruction execution for hard real-time control loops.
Max fCPU	24 MHz; supports time-critical automotive functions such as spark timing and fuel injection pulse width modulation.
Flash Memory	128 Kbyte Flash with 20-year data retention at 55 °C; sufficient for complex ECU firmware with OTA update partitioning.
Data EEPROM	2 Kbyte true data EEPROM rated for 300 kcycles; stores calibration parameters and fault logs without external NV memory.
CAN Interface	CAN 2.0B compliant, 1 Mbit/s operation; meets ISO 11898-1 for robust in-vehicle network communication.
ADC Resolution	10-bit SAR ADC with ±2 LSB TUE and 1 LSB linearity; provides accurate analog sensor readings (e.g., throttle position, coolant temp).
Operating Temp	−40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0 for under-hood deployment without derating.

Pinout & Package

LQFP64 package (10 × 10 mm, 0.5 mm pitch), RoHS-compliant, with exposed thermal pad for enhanced heat dissipation in high-temperature automotive environments.

Pin/Terminal	Circuit Role	Design Meaning
VDD, VSS	Power supply and ground	Dual 3–5.5 V supply rails; supports wide-input automotive battery voltage range with internal voltage regulation.
NRST	Active-low reset input	Asynchronous reset with internal pull-up; compatible with external watchdog or power monitor ICs.
PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE7, PF0–PF7	General-purpose I/O ports	Up to 68 user pins including 11 high-sink I/Os; immune to current injection per ISO 10605 for EMC robustness.
CAN_RX / CAN_TX	CAN physical layer interface	Differential bus signals compliant with ISO 11898-2; require external transceiver (e.g., TJA1042) for full node implementation.
OSC_IN / OSC_OUT	External crystal oscillator connection	Supports 1–24 MHz crystal or ceramic resonator; enables precise timing for LIN/CAN baud rate generation.
SWIM	Single-wire interface for programming/debug	Enables in-system programming and real-time debugging using ST-LINK/V2 or compatible tools.

Key Features

Feature	Design Value
AEC-Q100 Grade 0 qualification	Validated for continuous operation at 150 °C junction temperature - suitable for direct-mount engine compartment applications.
Integrated clock security system (CSS)	Dedicated hardware monitor detects HSE oscillator failure and triggers safe state entry within ≤4 µs.
Low-power modes with clock gating	Wait, auto-wakeup, and Halt modes reduce active current to <1.5 µA (Halt); enables battery-conscious always-on functions.
LIN 2.2-compliant UART (LINUART)	Hardware LIN master/slave support with automatic resynchronization; eliminates software bit-banging overhead.
Advanced control timer (TIM1)	16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time - ideal for 3-phase motor gate drive.

Applications

Engine Control Unit (ECU)

Body Control Module (BCM)

Use Scenario: Real-time acquisition of crankshaft position, oxygen sensor, and manifold pressure signals; closed-loop control of fuel injectors and ignition coils.

IC Role / Device Role / Timing Role: Primary MCU executing safety-critical control algorithms with deterministic interrupt latency and CAN-based diagnostics.

Use Value: 24 MHz fCPU and 10-bit ADC with 1 LSB linearity ensure sub-degree spark timing accuracy and <1% air-fuel ratio deviation.

Use Scenario: Centralized management of door locks, window lifts, lighting sequences, and HVAC fan speed via LIN and CAN networks.

IC Role / Device Role / Timing Role: System coordinator interfacing with multiple LIN slaves and gateway CAN nodes using hardware LINUART and beCAN peripherals.

Use Value: Integrated LIN 2.2 master mode and 300 kcycle EEPROM enable reliable seat position memory and adaptive lighting profiles without external components.

Transmission Control Unit (TCU)

Electric Power Steering (EPS)

Use Scenario: Monitoring gear selector position, turbine speed, and solenoid valve feedback; executing shift logic with torque interruption coordination.

IC Role / Device Role / Timing Role: Safety-relevant controller with ASIL-B capable peripherals (watchdog, CSS, memory protection) and CAN diagnostics.

Use Value: Window watchdog timer and independent watchdog provide dual-layer fault detection; 150 °C rating ensures reliability near transmission housing.

Use Scenario: Torque assist calculation using steering angle, vehicle speed, and motor current feedback; PWM generation for 3-phase brushless motor drive.

IC Role / Device Role / Timing Role: Motor control MCU leveraging TIM1's dead-time insertion and complementary outputs for gate driver signal conditioning.

Use Value: Advanced control timer supports <50 ns dead-time resolution and synchronous PWM updates - critical for reducing motor torque ripple.

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive 8-bit microcontroller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM8AF6269TDTR	64 Kbyte Flash, same LQFP64 package, identical peripheral set except reduced Flash size and no data EEPROM.	Suitable for cost-sensitive BCMs with smaller firmware footprint and no field-updatable calibration storage.	Select when firmware size ≤64 KB and EEPROM persistence is not required for runtime parameter storage.
RL78/F13-BS	Renesas RL78 core, 32 Kbyte Flash, 2 Kbyte RAM, CAN 2.0B, but no integrated data EEPROM; operates up to 125 °C.	Used in mid-tier automotive clusters where lower temperature grade suffices and toolchain ecosystem favors Renesas.	Choose if existing RL78 development infrastructure exists and 150 °C operation is not mandatory.

Compared with STM8AF62A6UDX, STM8AF6269TDTR trades Flash and EEPROM capacity for BOM cost reduction, while RL78/F13-BS offers different toolchain and lifecycle support but lacks Grade 0 thermal qualification and embedded EEPROM - impacting long-term calibration integrity in harsh environments.

Availability

STM8AF62A6UDX is available at Aetrix Electronics and suitable for engine control units, transmission control modules, body control modules, and electric power steering systems requiring stable component supply across extended automotive product lifecycles.

Supply support for STM8AF62A6UDX 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 devices, sensors, and analog ICs for automotive, industrial, and consumer markets.

The STM8AF series targets automotive body, chassis, and powertrain applications with AEC-Q100 qualification, extended temperature operation, and integrated CAN/LIN interfaces - engineered specifically for functional safety-aware embedded control.

FAQ

What is the maximum junction temperature specification for STM8AF62A6UDX?

The device is qualified per AEC-Q100 Grade 0 with a maximum junction temperature of +150 °C. Electrical characteristics are guaranteed over −40 °C to +150 °C ambient, and thermal design must maintain T_J ≤ 150 °C under worst-case power dissipation and airflow conditions.

Does STM8AF62A6UDX include hardware support for LIN communication?

Yes - it integrates a LINUART peripheral compliant with LIN 2.2 specification, supporting both master and slave modes with automatic resynchronization, break detection, and checksum handling in hardware, eliminating software overhead for LIN protocol stack implementation.

Can the internal 16 MHz RC oscillator be calibrated for improved accuracy?

Yes - the HSI oscillator features user-trimmable calibration via the CLK_HSITRIMR register, allowing adjustment in ±16 steps (±0.5% typical step size) to compensate for process and temperature variation, achieving ±1% accuracy across temperature when trimmed.

Is SWIM debug interface supported on STM8AF62A6UDX?

Yes - the Single Wire Interface Module (SWIM) is fully implemented, enabling non-intrusive in-circuit debugging and programming via a single pin (SWIM) using ST-LINK/V2 or compatible debug probes, with full access to registers, memory, and real-time variable monitoring.

STM8AF62A6UDX Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 32-VFQFN Exposed Pad

Series:: STM8A

Packaging:: Tube

Product Status:: Active

Programmable:: Not Verified

Core Processor:: STM8A

Core Size:: 8-Bit

Speed:: 24MHz

Connectivity:: I2C, LINbus, SPI, UART/USART

Peripherals:: Brown-out Detect/Reset, POR, PWM, WDT

Number of I/O:: 25

Program Memory Size:: 128KB (128K x 8)

Program Memory Type:: FLASH

EEPROM Size:: 2K x 8

RAM Size:: 6K x 8

Voltage - Supply (Vcc/Vdd):: 3V ~ 5.5V

Data Converters:: A/D 7x10b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 150°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:

STM8AF62A6UDX FAQ

1.How can I place an order for STM8AF62A6UDX through Aetrix?

Please submit a Request for Quotation (RFQ) for STM8AF62A6UDX on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for STM8AF62A6UDX reliable?

The price and inventory of STM8AF62A6UDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF62A6UDX is usually 5 days.

3.What payment methods are accepted for STM8AF62A6UDX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF62A6UDX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM8AF62A6UDX?

STM8AF62A6UDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM8AF62A6UDX order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for STM8AF62A6UDX?

For technical support, including STM8AF62A6UDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF62A6UDX requirements.

6.How does Aetrix verify that STM8AF62A6UDX is sourced from the original manufacturer or authorized distributors?

All STM8AF62A6UDX products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that STM8AF62A6UDX meets industry standards.

7.What is the process for return or replacement of STM8AF62A6UDX?

All STM8AF62A6UDX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF62A6UDX, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The STM8AF62A6UDX part is unused and in its original packaging.

Return procedure for STM8AF62A6UDX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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