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STMicroelectronics STM8AF6266ITCX
- Part No.:
- STM8AF6266ITCX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
STM8AF6266ITCX.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,189
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Product details
Overview
STM8AF6266ITCX from STMicroelectronics is an AEC-Q100 qualified automotive 8-bit microcontroller featuring a 16 MHz STM8A core, 32 Kbyte Flash program memory, 1 Kbyte true data EEPROM, and integrated 10-bit ADC with up to 10 channels - deployed in engine control units for LIN-based sensor interface and actuator timing.
For engineers reviewing the STM8AF6266ITCX datasheet, STM8AF6266ITCX pinout, STM8AF6266ITCX application, or STM8AF6266ITCX equivalent, this page delivers verified package mapping (VFQFPN32), validated automotive-grade timing specs (150 °C operation), confirmed LIN 2.2 compliance, and real-world I/O robustness against current injection.
Technical Context
The STM8AF6266ITCX implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, enabling 10 MIPS at 16 MHz. It integrates dual clock domains: user-trimmable 16 MHz HSI RC oscillator and 128 kHz LSI RC oscillator, both backed by Clock Security System (CSS) monitoring.
Its peripheral set includes one advanced control timer (TIM1) with 4 CAPCOM channels, dead-time insertion, and complementary outputs; two general-purpose 16-bit timers (TIM2/TIM3); LINUART supporting master/slave modes with automatic resynchronization; and SPI up to 8 Mbit/s alongside I²C at 400 Kbit/s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time response in safety-critical automotive tasks. |
| Max fCPU | 16 MHz at VDD = 3.3–5.5 V; supports full-speed LIN communication and PWM generation without external clocking. |
| Flash Memory | 32 Kbyte program Flash with 20-year data retention at 55 °C after 1 kcycle; suitable for field-updatable ECU firmware. |
| Data EEPROM | 1 Kbyte true data EEPROM with 300 kcycle endurance; stores calibration data, fault logs, and configuration parameters across vehicle lifetime. |
| ADC Resolution | 10-bit SAR ADC with ±2 LSB total unadjusted error (TUE); provides accurate analog sensing for throttle position, coolant temperature, and battery voltage. |
| Operating Temperature | −40 °C to +150 °C ambient; certified for under-hood deployment in powertrain and chassis control modules. |
| LIN Compliance | LIN 2.2 compliant UART with automatic resynchronization; eliminates need for external LIN transceiver in cost-sensitive nodes. |
| I/O Count | 38 user pins including 10 high-sink (HS) I/Os; supports direct drive of LEDs, relays, and discrete sensors without external buffers. |
Pinout & Package
STM8AF6266ITCX is housed in a VFQFPN32 (5 × 5 mm, 0.5 mm pitch) thermally enhanced package optimized for automotive PCB space constraints and thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD | Power supply input | Primary 3.3–5.5 V supply rail; decoupled via external 100 nF capacitor to ensure stable core and peripheral operation. |
| VSS | Ground reference | Digital ground plane connection; requires low-inductance layout to minimize noise coupling into ADC and timers. |
| NRST | Active-low reset input | Asynchronous reset pin with internal pull-up; accepts external reset IC or microcontroller watchdog signal for system-level fault recovery. |
| PA0–PA7 | General-purpose I/O port A | 8-bit bidirectional port with alternate functions including TIM1/2 channels, ADC inputs, and SPI/I²C signals. |
| PB0–PB7 | General-purpose I/O port B | 8-bit port supporting LINUART TX/RX, TIM3, and external interrupt sources; includes HS I/O capability on PB5–PB7. |
| PC0–PC7 | General-purpose I/O port C | 8-bit port with SWIM debug interface (PC7), ADC inputs, and clock output options; enables in-circuit programming and diagnostics. |
| PD0–PD7 | General-purpose I/O port D | 8-bit port with TIM1 complementary outputs (PD0–PD2), beeper driver, and auto-wakeup timer input; critical for motor control timing. |
| VCAP | Internal regulator bypass | Connects 2.2 µF ceramic capacitor to stabilize internal 1.8 V core voltage; mandatory for reliable 16 MHz operation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for −40 °C to +150 °C operation; meets automotive reliability requirements for powertrain ECUs without derating. |
| Embedded LIN 2.2 UART | Hardware-accelerated LIN protocol stack with automatic baud rate resynchronization; reduces CPU load and improves bus timing tolerance. |
| Advanced Control Timer (TIM1) | 16-bit timer with 3 complementary PWM outputs and programmable dead-time insertion; enables precise 3-phase motor gate driving. |
| True Data EEPROM | 1 Kbyte on-chip EEPROM with 300 kcycle endurance and independent erase/write control; eliminates external nonvolatile memory in body control modules. |
| Robust I/O design | Immunity to current injection up to 100 mA per pin; prevents latch-up during load dump or ESD events in harsh automotive environments. |
| Low-power modes | Wait, Auto-wakeup, and Halt modes with configurable clock gating; achieves sub-1 µA standby current for always-on vehicle network nodes. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time management of fuel injection timing, ignition spark advance, and knock detection using analog sensor inputs and PWM-driven actuators. IC Role / Device Role / Timing Role: Primary MCU executing closed-loop control algorithms with sub-microsecond timer resolution and LIN-based communication to dashboard cluster. Use Value: Integrated 10-bit ADC with scan mode and TIM1's dead-time insertion enable precise cylinder-by-cylinder combustion control without external timing ICs. |
Use Scenario: Centralized control of door locks, window lifters, interior lighting, and HVAC fan speed in passenger vehicles. IC Role / Device Role / Timing Role: System controller interfacing with LIN slave nodes (e.g., mirror controls, seat modules) while managing local PWM dimming and relay drivers. Use Value: 38-pin I/O count with 10 HS outputs allows direct drive of solenoids and motors; embedded EEPROM stores user preferences and fault history across ignition cycles. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) |
|
Use Scenario: Gear selection logic, clutch engagement timing, and torque converter lock-up control using CAN/LIN hybrid networks. IC Role / Device Role / Timing Role: Safety-relevant controller coordinating hydraulic valve timing and shift solenoid sequencing via high-resolution PWM outputs. Use Value: Advanced control timer (TIM1) delivers synchronized 3-channel complementary PWM with <10 ns dead-time accuracy, preventing shoot-through in solenoid drivers. |
Use Scenario: Torque assist calculation and motor phase commutation in brushless DC steering motors, requiring fast analog feedback and precise PWM timing. IC Role / Device Role / Timing Role: Real-time motor controller executing FOC algorithms with ADC sampling synchronized to PWM center-aligned mode. Use Value: 10-bit ADC with individual data buffers and continuous sampling mode captures motor current and position sensor signals at 1 MS/s without CPU intervention. |
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 |
|---|---|---|---|
| STM8AF6268ITCX | Same core, 32 Kbyte Flash, but LQFP48 package (48-pin, 7×7 mm); adds 2 extra I/Os and 2 additional ADC channels. | Preferred where board layout allows larger footprint and higher I/O density is required for multi-sensor clusters. | Select when needing >38 I/Os or additional ADC inputs; not drop-in due to different pinout and thermal profile. |
| RL78/F13 | Renesas RL78 core, 24 MHz max, 128 Kbyte Flash, 10-bit ADC, but no native LIN UART - requires external transceiver. | Suitable for new designs prioritizing longer Flash lifetime (>100 kcycle) and lower active current, but increases BOM count. | Choose for extended Flash endurance and ultra-low-power sleep modes; avoid if LIN integration and minimal component count are critical. |
Compared with STM8AF6266ITCX, STM8AF6268ITCX offers more I/O and ADC resources in a larger package, while RL78/F13 trades integrated LIN for higher Flash endurance and deeper low-power states - making STM8AF6266ITCX optimal for space-constrained, LIN-centric automotive nodes requiring proven AEC-Q100 Grade 0 reliability.
Availability
STM8AF6266ITCX is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control units requiring stable component supply across automotive production lifecycles.
Supply support for STM8AF6266ITCX 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, specializing in automotive, industrial, and power management ICs with vertical manufacturing capabilities.
The STM8A product line targets cost-sensitive, high-reliability automotive applications - delivering AEC-Q100 qualified 8-bit MCUs with integrated LIN, robust I/O, and extended temperature operation for powertrain and chassis systems.
FAQ
What is the maximum operating frequency and voltage range for STM8AF6266ITCX?
The STM8AF6266ITCX operates at up to 16 MHz across a supply voltage range of 3.0 V to 5.5 V. Its fCPU vs. VDD curve (Figure 8 in DocID14952 Rev 11) confirms stable 16 MHz operation down to 3.3 V at 150 °C, with derating required below that voltage. The internal 16 MHz HSI oscillator is factory-trimmed and user-adjustable via option bytes.
Does STM8AF6266ITCX include hardware LIN support, and what version is implemented?
Yes, STM8AF6266ITCX integrates a dedicated LINUART peripheral compliant with LIN 2.2 specification. It supports both master and slave modes, automatic baud rate resynchronization, and frame checksum handling in hardware - eliminating software overhead and ensuring timing accuracy across temperature and voltage variations.
What package type and pin count does STM8AF6266ITCX use?
STM8AF6266ITCX uses the VFQFPN32 package: a 32-pin, 5 × 5 mm, 0.5 mm pitch very thin profile quad flat no-lead package. This compact, thermally efficient package is specified in Table 46 of DocID14952 Rev 11 and is distinct from the LQFP32 and LQFP48 variants in the same family.
How is the embedded EEPROM endurance and data retention specified?
The STM8AF6266ITCX features 1 Kbyte of true data EEPROM rated for 300,000 write/erase cycles and 20 years of data retention at 55 °C after 1,000 cycles. These values are measured per JESD22-A117 and documented in Section 10.3.5 (Memory Characteristics) of the datasheet, with no derating required for automotive temperature profiles.
STM8AF6266ITCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- STM8A
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Core Processor:
- STM8A
- Core Size:
- 8-Bit
- Speed:
- 16MHz
- Connectivity:
- I2C, LINbus, SPI, UART/USART
- Peripherals:
- Brown-out Detect/Reset, POR, PWM, WDT
- Number of I/O:
- 25
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- 1K x 8
- RAM Size:
- 2K x 8
- Voltage - Supply (Vcc/Vdd):
- 3V ~ 5.5V
- Data Converters:
- A/D 7x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6266ITCX FAQ
1.How can I place an order for STM8AF6266ITCX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6266ITCX 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 STM8AF6266ITCX reliable?
The price and inventory of STM8AF6266ITCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6266ITCX is usually 5 days.
3.What payment methods are accepted for STM8AF6266ITCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6266ITCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6266ITCX?
STM8AF6266ITCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6266ITCX 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 STM8AF6266ITCX?
For technical support, including STM8AF6266ITCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6266ITCX requirements.
6.How does Aetrix verify that STM8AF6266ITCX is sourced from the original manufacturer or authorized distributors?
All STM8AF6266ITCX 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 STM8AF6266ITCX meets industry standards.
7.What is the process for return or replacement of STM8AF6266ITCX?
All STM8AF6266ITCX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6266ITCX, 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 STM8AF6266ITCX part is unused and in its original packaging.
Return procedure for STM8AF6266ITCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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