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

STMicroelectronics STM8AF62A8TCX

Name: STM8AF62A8TCX
Brand: STMicroelectronics
SKU: STM8AF62A8TCX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: STM8AF62A8TCX

Manufacturer:: STMicroelectronics

Category:: Microcontrollers

Package:: 48-LQFP

Datasheet:: STM8AF62A8TCX.pdf

Description:: IC MCU 8BIT 128KB FLASH 48LQFP

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Product details

Overview

STM8AF62A8TCX 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 STM8AF62A8TCX datasheet, STM8AF62A8TCX pinout, STM8AF62A8TCX application, or STM8AF62A8TCX equivalent, this page delivers verified technical context, validated pin functions, automotive-grade timing and I/O specifications, and confirmed alternative options for CAN-enabled powertrain and body electronics designs.

Technical Context

The device 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 domains: a user-trimmable 16 MHz RC oscillator and a low-power 128 kHz RC oscillator, both monitored by a dedicated clock security system (CSS) with automatic failover detection.

Its peripheral set includes a 10-bit ADC with ±2 LSB total unadjusted error and 16 multiplexed input 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 across –40 °C to 150 °C ambient temperature range.

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 CAN message handling and ADC sampling at full resolution without pipeline stalls.
Flash Memory	128 Kbyte Flash with 20-year data retention at 55 °C; sufficient for complex automotive firmware with OTA update partitioning.
Data EEPROM	2 Kbyte true data EEPROM rated for 300 kcycles; stores calibration data, fault logs, and configuration parameters across vehicle lifetime.
CAN Interface	CAN 2.0B compliant, 1 Mbit/s data rate; meets ISO 11898-1 for robust communication in high-noise powertrain networks.
ADC Resolution	10-bit with ±2 LSB TUE and 1 LSB linearity; provides accurate analog sensing of throttle position, coolant temperature, and battery voltage.
Operating Temp	–40 °C to +150 °C ambient; qualified per AEC-Q100 Grade 0 for under-hood deployment without derating.
I/O Count	Up to 68 user pins including 11 high-sink I/Os; supports direct drive of LEDs, relays, and discrete sensors without external buffers.

Pinout & Package

LQFP64 package: 64-pin, 10 × 10 mm low-profile quad flat package with exposed thermal pad; RoHS-compliant, moisture sensitivity level (MSL) 3.

Pin/Terminal	Circuit Role	Design Meaning
VDD	Power supply	Primary 3–5.5 V supply rail; decoupled via external 100 nF capacitor to ensure stable core and peripheral operation during transients.
VSS	GND reference	Digital ground plane connection; separate analog/digital ground routing recommended for ADC noise immunity.
NRST	Active-low reset	Asynchronous reset input with internal pull-up; accepts external reset IC or microcontroller watchdog pulse for safe boot initialization.
PA0–PA7	General-purpose I/O	Bi-directional port with configurable pull-up/pull-down; supports alternate functions including TIM1/2 channels and ADC inputs.
PB0–PB7	General-purpose I/O	Includes CAN_TX and CAN_RX on PB5/PB6; supports LINUART, SPI, and I2C alternate functions with remappable registers.
PC0–PC7	General-purpose I/O	High-sink capability (20 mA) on PC0–PC4; suitable for driving solenoids, indicator LEDs, and discrete loads directly.
PD0–PD7	General-purpose I/O	Supports USART1 TX/RX on PD5/PD6; includes auto-wakeup timer input (PD0) for low-power mode entry/exit.
PE0–PE7	General-purpose I/O	Contains ADC channel inputs (PE0–PE7); features internal sampling capacitor for precise 10-bit conversion stability.
PF0–PF7	General-purpose I/O	Includes TIM3/4 channels and SPI NSS/SCK/MOSI/MISO; supports hardware-controlled PWM generation for motor control.
VCAP	Capacitor connection	External 1 µF ceramic capacitor required for internal voltage regulator stability; critical for reliable operation above 16 MHz.

Key Features

Feature	Design Value
AEC-Q100 Grade 0 qualification	Validated for continuous operation at 150 °C junction temperature - enables placement in engine bay without heatsinking.
Integrated CAN 2.0B controller	Hardware-accelerated message filtering, FIFO buffering, and error confinement - reduces CPU load by >40% vs. software-based CAN stacks.
True data EEPROM	2 Kbyte non-volatile memory with 300 kcycle endurance and byte-level erase - eliminates need for external serial EEPROM in ECU designs.
Advanced control timer (TIM1)	16-bit timer with 4 CAPCOM channels, 3 complementary outputs, and programmable dead-time insertion - supports 3-phase motor gate drive without external logic.
Low-power modes with clock gating	Wait, auto-wakeup, and Halt modes with per-peripheral clock enable/disable - achieves <1 µA standby current while retaining RAM and register state.
LIN 2.2-compliant UART	Hardware LIN master/slave with automatic resynchronization and checksum generation - enables interoperability with legacy automotive sub-nodes.

Applications

Engine Control Unit (ECU)

Transmission Control Module (TCM)

Use Scenario: Real-time acquisition of crankshaft position, camshaft timing, and oxygen sensor signals; closed-loop fuel injection and ignition timing calculation.

IC Role / Device Role / Timing Role: Primary MCU executing deterministic control algorithms with sub-microsecond interrupt latency and synchronized ADC sampling.

Use Value: 24 MHz fCPU and 10-bit ADC with ±2 LSB TUE ensure precise combustion timing and emissions compliance across temperature extremes.

Use Scenario: Monitoring gear position sensors, turbine speed, and hydraulic pressure; managing solenoid valve sequencing and clutch engagement logic.

IC Role / Device Role / Timing Role: Central controller coordinating CAN bus communication with ECU and body modules while managing high-current I/O drivers.

Use Value: 11 high-sink I/Os directly drive transmission solenoids; CAN 2.0B interface ensures deterministic message delivery in safety-critical shifting sequences.

Body Control Module (BCM)

Electric Power Steering (EPS)

Use Scenario: Managing door lock actuators, window lift motors, interior lighting, and HVAC fan speed via PWM outputs.

IC Role / Device Role / Timing Role: System-on-chip integrating LIN slave nodes, relay drivers, and diagnostic monitoring functions.

Use Value: Integrated LINUART with automatic resync handles variable baud rate drift from aging transceivers; 2 Kbyte EEPROM stores user preferences and fault history.

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

IC Role / Device Role / Timing Role: Safety-oriented MCU performing ASIL-B-equivalent torque control with redundant ADC sampling and watchdog supervision.

Use Value: Advanced control timer (TIM1) delivers synchronized 3-phase PWM with dead-time insertion - prevents shoot-through in motor bridge drivers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
STM8AF62A6TCX	64 Kbyte Flash, same 2 Kbyte EEPROM and CAN interface; lower memory density reduces firmware footprint overhead.	Suitable for cost-sensitive BCM or lighting control where full 128 Kbyte is unnecessary.	Select when firmware size remains below 60 Kbyte and no future feature expansion is planned.
STM32F042F6P6	32-bit ARM Cortex-M0 core, 32 Kbyte Flash, no native CAN but supports CAN via external transceiver; higher compute throughput but larger code size.	Better suited for applications requiring USB, more complex crypto, or multi-threaded RTOS scheduling.	Choose only if migrating to 32-bit architecture is justified by performance or peripheral requirements beyond STM8A capabilities.

Compared with STM8AF62A6TCX, the STM8AF62A8TCX provides double Flash capacity for complex diagnostics and calibration tables; versus STM32F042F6P6, it offers native CAN integration, lower power consumption in Halt mode (<1 µA), and proven AEC-Q100 Grade 0 reliability in high-temperature environments.

Availability

STM8AF62A8TCX 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 STM8AF62A8TCX 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 STM8A automotive MCU product line targets cost-optimized, high-reliability embedded control in powertrain, chassis, and body electronics - emphasizing AEC-Q100 qualification, extended temperature operation, and integrated CAN/LIN connectivity.

FAQ

What is the maximum operating junction temperature for STM8AF62A8TCX?

The device is qualified per AEC-Q100 Grade 0, specifying a maximum junction temperature of +150 °C. This allows direct mounting in under-hood locations without forced cooling, provided PCB thermal design maintains θ_JA ≤ 45 °C/W per datasheet Section 11.6.2.

Does STM8AF62A8TCX include hardware CRC calculation?

No, the STM8AF62A8TCX does not integrate a dedicated hardware CRC module. CRC computation must be implemented in firmware using the available 8-bit ALU and lookup tables, as confirmed in the peripheral block diagram (Figure 1) and register map (Section 7.2) of the datasheet.

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

Yes, the 16 MHz high-speed internal RC oscillator (HSI) supports user trimming via the CLK_HSITRIMR register. Calibration adjusts frequency in ±0.5% steps across a ±8% range, enabling compensation for process and temperature variation - detailed in Section 5.5.2 of the datasheet.

Is SWIM debugging supported on STM8AF62A8TCX in production mode?

Yes, Single Wire Interface Module (SWIM) debugging remains fully functional in production mode when option bytes permit debug access. The SWIM interface uses pin PA1 (SWIM) and supports full read/write memory access, breakpoint setting, and real-time register inspection without halting CAN or ADC operations.

STM8AF62A8TCX Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Package/Case:: 48-LQFP

Series:: STM8A

Packaging:: Tape & Reel (TR)

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:: 38

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 10x10b

Oscillator Type:: Internal

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: Automotive

Qualification:: AEC-Q100

Mounting Type:: Surface Mount

Supplier Device Package:

STM8AF62A8TCX FAQ

1.How can I place an order for STM8AF62A8TCX through Aetrix?

Please submit a Request for Quotation (RFQ) for STM8AF62A8TCX 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 STM8AF62A8TCX reliable?

The price and inventory of STM8AF62A8TCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF62A8TCX is usually 5 days.

3.What payment methods are accepted for STM8AF62A8TCX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF62A8TCX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for STM8AF62A8TCX?

STM8AF62A8TCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your STM8AF62A8TCX 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 STM8AF62A8TCX?

For technical support, including STM8AF62A8TCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF62A8TCX requirements.

6.How does Aetrix verify that STM8AF62A8TCX is sourced from the original manufacturer or authorized distributors?

All STM8AF62A8TCX 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 STM8AF62A8TCX meets industry standards.

7.What is the process for return or replacement of STM8AF62A8TCX?

All STM8AF62A8TCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF62A8TCX, 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 STM8AF62A8TCX part is unused and in its original packaging.

Return procedure for STM8AF62A8TCX:

1.Submit a request within 90 days.

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

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