My Inquiry
My Account
STMicroelectronics STM8AF6266UDX
- Part No.:
- STM8AF6266UDX
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-UFQFN Exposed Pad
- Datasheet:
-
STM8AF6266UDX.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 32UFQFPN
- Quantity:
- Payment:
- Shipping:
Inventory:3,048
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
STM8AF6266UDX 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. It supports LIN 2.2, SPI (up to 8 Mbit/s), and I²C (up to 400 Kbit/s), and operates across -40 °C to 150 °C for engine control, body electronics, and powertrain sensor interfaces.
For engineers reviewing the STM8AF6266UDX datasheet, STM8AF6266UDX pinout, STM8AF6266UDX application, or STM8AF6266UDX equivalent, key selection criteria include AEC-Q100 Grade 0 qualification, 150 °C ambient operation, VFQFPN32 (5×5 mm) package compatibility, and LINUART with automatic resynchronization for automotive network nodes.
Technical Context
The STM8AF6266UDX implements a Harvard-architecture STM8A CPU with 3-stage pipeline and 1.6 cycles/instruction average, delivering 10 MIPS at 16 MHz. Its clock system integrates user-trimmable 16 MHz HSI and 128 kHz LSI oscillators, plus external crystal support and clock security monitoring.
Peripheral integration includes an advanced control timer (16-bit, 4 CAPCOM channels, dead-time insertion), two general-purpose 16-bit PWM timers, auto-wakeup timer, window/independent watchdogs, and LINUART with master/slave mode and hardware-level LIN frame handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | STM8A 8-bit Harvard core with 3-stage pipeline; enables deterministic real-time execution in safety-critical automotive firmware. |
| Max Clock Frequency | 16 MHz fCPU; supports 10 MIPS performance at full speed for timing-sensitive control loops. |
| 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; retains calibration data, odometer values, and fault logs without external NV memory. |
| ADC Resolution & Channels | 10-bit ADC with ±2 LSB TUE accuracy and up to 10 multiplexed inputs; meets ASIL-B sensor signal acquisition requirements. |
| Operating Temperature | -40 °C to +150 °C ambient; validated for under-hood applications including engine control modules and transmission controllers. |
| LIN Compliance | LIN 2.2 compliant UART with automatic resynchronization and hardware baud rate detection; reduces CPU overhead in LIN cluster nodes. |
Pinout & Package
STM8AF6266UDX is housed in a VFQFPN32 (5 × 5 mm, 0.5 mm pitch) package with exposed thermal pad. This compact, thermally enhanced footprint supports high-density automotive PCB layouts and meets reflow profile requirements for lead-free assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual 3–5.5 V supply rails; supports direct connection to automotive battery (via regulator) and robust noise immunity per ISO 11898-2. |
| NRST | Active-low reset input | Asynchronous reset with internal pull-up; meets automotive cold-cranking voltage dip tolerance down to 2.4 V. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/O ports | Up to 38 user pins including 10 high-speed I/Os; immune to current injection per AEC-Q100 stress test conditions. |
| OSC_IN / OSC_OUT | Crystal oscillator interface | Supports low-power crystal resonator (e.g., 4–20 MHz); enables precise timing for LIN synchronization and CAN/LIN coexistence. |
| SWIM | Single-wire interface module | On-chip debug and programming interface; allows in-system programming and real-time debugging without dedicated JTAG pins. |
| LIN_TX / LIN_RX | LIN bus transceiver interface | Dedicated LINUART signals; enable direct connection to LIN transceiver (e.g., TLE7259) with minimal external components. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 0 qualification | Validated for 150 °C ambient operation and automotive temperature cycling; eliminates need for derating in under-hood designs. |
| Advanced control timer with dead-time insertion | Enables safe driving of complementary MOSFET pairs in motor control and DC-DC converter applications without external logic. |
| True data EEPROM (1 Kbyte) | Persists critical runtime parameters across power cycles without external serial EEPROM, reducing BOM count and board area. |
| Low-power modes with clock gating | Wait/auto-wakeup/Halt modes reduce current to <1.5 µA (Halt), enabling always-on LIN node wake-up via bus activity. |
| Analog watchdog in ADC | Monitors sensor inputs for out-of-range conditions and triggers interrupt or reset autonomously-no CPU polling required. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of throttle position, coolant temperature, and crankshaft angle for fuel injection timing. IC Role / Device Role / Timing Role: Primary 8-bit controller executing closed-loop combustion control algorithms with sub-millisecond interrupt latency. Use Value: 16 MHz deterministic execution and 10-bit ADC with scan mode enable synchronized multi-sensor sampling within single instruction cycle budget. |
Use Scenario: Centralized management of door locks, interior lighting, and window lift motors in premium vehicle platforms. IC Role / Device Role / Timing Role: LIN master node coordinating slave actuators and aggregating status over LIN cluster. Use Value: Integrated LINUART with automatic resynchronization maintains communication integrity during battery voltage transients common in BCM power domains. |
| Transmission Control Unit (TCU) | Electric Power Steering (EPS) Sensor Interface |
Use Scenario: Gear selection logic, solenoid driver timing, and torque converter clutch control in 6-speed automatic transmissions. IC Role / Device Role / Timing Role: Safety-relevant controller interfacing with CAN for vehicle network coordination and local PWM-driven solenoid outputs. Use Value: Advanced control timer with dead-time insertion ensures glitch-free complementary PWM output to H-bridge drivers, preventing shoot-through faults. |
Use Scenario: Acquisition and preprocessing of torque and steering angle sensor signals before CAN transmission to EPS ECU. IC Role / Device Role / Timing Role: Dedicated analog front-end controller with ADC watchdog and continuous sampling mode for fail-safe sensor health monitoring. Use Value: 2 LSB TUE linearity and on-chip analog watchdog detect sensor drift or open-circuit faults within 100 µs-meeting ISO 26262 ASIL-B diagnostic coverage targets. |
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 |
|---|---|---|---|
| STM8AF6268UDX | Same core, package, and peripherals; differs only in Flash size (64 Kbyte vs. 32 Kbyte) and EEPROM (2 Kbyte vs. 1 Kbyte). | Required when firmware image exceeds 32 Kbyte or extended nonvolatile parameter storage is needed. | Select STM8AF6268UDX only if code growth or future feature expansion justifies higher cost and memory overhead. |
| RL78/F13-CD | Renesas RL78 core (16-bit), 32 Kbyte Flash, 2 Kbyte RAM, but no integrated LINPHY; requires external transceiver and lacks AEC-Q100 Grade 0 rating. | Suitable for lower-temperature cabin applications where LIN is implemented externally and 150 °C operation is not required. | Choose RL78/F13-CD only for cost-sensitive, non-under-hood applications where 16-bit processing margin offsets lack of integrated LIN and reduced temperature grade. |
Compared with STM8AF6266UDX, STM8AF6268UDX offers scalable memory for larger firmware while maintaining identical pinout and qualification; RL78/F13-CD trades automotive-grade thermal robustness and integrated LIN for broader 16-bit ecosystem support but demands additional external components and validation effort.
Availability
STM8AF6266UDX is available at Aetrix Electronics and suitable for engine control units, body control modules, and transmission control systems requiring stable component supply across extended automotive product lifecycles.
Supply support for STM8AF6266UDX 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 capability and AEC-Q100-aligned quality systems.
The STM8A automotive microcontroller family targets cost-optimized, high-reliability 8-bit control in engine management, chassis, and body electronics-designed specifically for functional safety compliance and harsh-environment resilience.
FAQ
What is the maximum junction temperature rating for STM8AF6266UDX?
The STM8AF6266UDX is rated for operation up to 150 °C ambient temperature and has a maximum junction temperature of 175 °C, verified per AEC-Q100 stress test conditions. Thermal design must maintain θJA ≤ 45 °C/W using the exposed thermal pad and appropriate PCB copper pour to meet this limit under full-load conditions.
Does STM8AF6266UDX support in-circuit debugging via SWIM without external hardware?
Yes-STM8AF6266UDX integrates a Single-Wire Interface Module (SWIM) that enables full in-circuit debugging and flash programming using only one dedicated pin (SWIM) and ground. No external debug adapter is required beyond a standard ST-LINK/V2 or compatible programmer supporting SWIM protocol.
Can the internal 16 MHz RC oscillator be calibrated for LIN timing accuracy?
Yes-the internal 16 MHz HSI oscillator is user-trimmable via the CLK_HSITRIMR register, allowing fine adjustment in ±1% steps. This enables LIN bit timing accuracy within ±1.5% over temperature and voltage, meeting LIN 2.2 master timing requirements without external crystal.
How many LIN nodes can STM8AF6266UDX manage as a master?
STM8AF6266UDX supports one LIN cluster as master via its integrated LINUART peripheral. It can address up to 16 slave nodes on a single LIN bus using standard identifier-based scheduling; multiple clusters require external LIN transceivers and software-managed time-division multiplexing.
STM8AF6266UDX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-UFQFN Exposed Pad
- 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 ~ 150°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
STM8AF6266UDX FAQ
1.How can I place an order for STM8AF6266UDX through Aetrix?
Please submit a Request for Quotation (RFQ) for STM8AF6266UDX 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 STM8AF6266UDX reliable?
The price and inventory of STM8AF6266UDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for STM8AF6266UDX is usually 5 days.
3.What payment methods are accepted for STM8AF6266UDX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for STM8AF6266UDX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for STM8AF6266UDX?
STM8AF6266UDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your STM8AF6266UDX 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 STM8AF6266UDX?
For technical support, including STM8AF6266UDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your STM8AF6266UDX requirements.
6.How does Aetrix verify that STM8AF6266UDX is sourced from the original manufacturer or authorized distributors?
All STM8AF6266UDX 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 STM8AF6266UDX meets industry standards.
7.What is the process for return or replacement of STM8AF6266UDX?
All STM8AF6266UDX units undergo pre-shipment inspection (PSI). If there is an issue with STM8AF6266UDX, 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 STM8AF6266UDX part is unused and in its original packaging.
Return procedure for STM8AF6266UDX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
STM8AF6266UDX Tags
-
ATTINY4-TSHR
Microchip Technology
-
ATTINY10-TSHR
Microchip Technology
-
ATTINY10-TS8R
Microchip Technology
-
ATTINY202-SSNR
Microchip Technology
-
ATTINY202-SSFR
Microchip Technology
-
ATTINY402-SSNR
Microchip Technology
-
PIC16F15213T-I/MF
Microchip Technology
-
PIC16F15213-E/MF
Microchip Technology
-
PIC10F200T-I/OT
Microchip Technology
-
ATTINY412-SSNR
Microchip Technology
-
PIC10F202T-I/OT
Microchip Technology
-
ATTINY404-SSNR
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
