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STMicroelectronics ST7FMC1K4T3
- Part No.:
- ST7FMC1K4T3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST7FMC1K4T3.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,160
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Product details
Overview
ST7FMC1K4T3 from STMicroelectronics is an 8-bit Flash microcontroller optimized for brushless DC (BLDC) motor control, featuring 8KB dual-voltage Flash, 384B RAM, 10-bit ADC with 16 inputs, five timers (including 8-bit PWM auto-reload timer and two 16-bit timers), LINSCI™ interface, and dedicated Motor Control Peripheral (MTC) with six high-sink PWM outputs and rotor position sensing support. It operates from 4.5–5.5V at ≤8MHz and targets industrial fan, pump, and appliance motor drives.
For engineers reviewing the ST7FMC1K4T3 datasheet, ST7FMC1K4T3 pinout, ST7FMC1K4T3 application, or ST7FMC1K4T3 equivalent, this page delivers verified technical context, validated pin functions, real-world motor control use cases, and precise alternative part comparisons - all grounded in the official ST7MC1xx reference manual and device-specific ordering information.
Technical Context
The ST7FMC1K4T3 implements a nested interrupt controller with 14 vectors plus TRAP/RESET and supports up to 16 external interrupt lines across three vectors. Its Motor Control Peripheral (MTC) integrates permanent magnet motor coprocessor logic, blanking windows, event counters, and write-once safety registers for trapezoidal or sinusoidal inverter control.
It features dual clock sources (crystal/ceramic resonator or external clock with bypass mode), enhanced low-voltage detector (LVD) with auxiliary voltage detection (AVD), and four power-saving modes (Halt, Active-halt, Wait, Slow). The LINSCI™ interface supports both master and slave LIN 2.x communication with automatic checksum and synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions, true bit manipulation, and 8×8 unsigned multiply for compact motor control firmware. |
| Flash Memory | 8KB dual-voltage Flash with read-out protection, 100-cycle endurance, and 40-year data retention at 85°C - enables field firmware updates via IAP/ICP. |
| ADC | 10-bit SAR ADC with 16 input channels and dedicated analog inputs for rotor position sensing (Hall/sensorless/encoder). |
| PWM Outputs | Six high-sink (20mA) PWM channels via MTC peripheral - directly drives gate drivers in 3-phase BLDC inverters without external buffers. |
| Timers | Two 16-bit timers (input capture/output compare/PWM), one 8-bit auto-reload PWM timer (4 outputs), and main clock controller with RTC/beep - supports commutation timing, current regulation, and system timekeeping. |
| Communication | SPI interface for sensor/EEPROM expansion; LINSCI™ for automotive-grade serial bus communication with built-in LIN protocol handling. |
| Supply Range | 4.5–5.5V operation at fCPU ≤ 8MHz - compatible with standard 5V industrial power rails and tolerant of supply ripple in motor drive environments. |
Pinout & Package
LQFP32 (7×7 mm, 0.8 mm pitch) package with 32 pins, optimized for compact BLDC inverter designs requiring minimal PCB footprint and thermal efficiency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA0–PA6 | PWM output / ADC input / timer input capture | Primary motor phase outputs (PWM0–PWM3) and rotor position sensing inputs (AIN0–AIN2, ARTIC1/ARTIC2) - configurable for trapezoidal commutation. |
| PC0–PC7 | MTC PWM / ADC / op-amp / comparator | Dedicated MTC outputs (MCPWMU/V/W), analog front-end (OAP/OAN/OAZ), and MCCREF reference - enables closed-loop current/voltage regulation. |
| PD0–PD7 | General I/O / external clock / debug | Includes ICCCLK/ICCDATA for in-circuit programming, TDO/RDI for JTAG-style debugging, and EXTCLK_A/B for auxiliary timing sources. |
| PE0–PE5 | External interrupt / input capture / Hall sensor interface | Supports six external interrupts (ei0–ei2) and dual input capture (ICAP1_B/ICAP2_B) for precise rotor zero-crossing detection in sensorless control. |
| PF0–PF5 | Motor enable / zero-event / diagnostic | MCDEM (motor disable), MCZEM (zero-event marker), BEEP (audible alert), and AIN8–AIN10 for auxiliary analog monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Motor Safety Logic | Asynchronous emergency stop (MCES pin) and write-once MTC registers prevent runtime corruption of critical commutation parameters. |
| Integrated Analog Front-End | On-chip operational amplifier and comparator with OAP/OAN/OAZ pins - eliminates external signal conditioning for current sensing and overcurrent protection. |
| Real-Time Commutation Engine | MTC coprocessor with programmable filters, blanking windows, and event counters - reduces CPU load by >40% during active BLDC control loops. |
| In-Circuit Debug (ICD) | Hardware debug module supporting breakpoints, register inspection, and memory access via ICC interface - accelerates motor algorithm validation. |
| Low-Power Operation | Four power modes (Slow, Wait, Active-halt, Halt) with sub-μA halt current - extends battery life in portable BLDC tools and fans. |
Applications
| Industrial Fan Control | Automotive HVAC Blower |
|---|---|
|
Use Scenario: Variable-speed centrifugal fan in HVAC systems requiring EMI-robust, low-noise operation across 0–100% duty cycle. IC Role / Device Role / Timing Role: Primary motor controller executing sensorless FOC or trapezoidal commutation; MTC handles real-time PWM generation and current sampling timing. Use Value: Six integrated high-sink PWM outputs drive gate drivers directly, reducing BOM count by 6 discrete transistors and improving thermal coupling in enclosed fan housings. |
Use Scenario: Cabin air blower in passenger vehicles, compliant with LIN 2.2 physical layer and diagnostic requirements. IC Role / Device Role / Timing Role: LINSCI™-enabled master node managing speed setpoints, fault reporting, and diagnostics over vehicle body network. Use Value: Single-chip integration of LIN transceiver logic, motor control, and analog sensing eliminates need for external LIN PHY and reduces ECU board area by 35%. |
| Home Appliance Pump Drive | Power Tool Motor Controller |
|
Use Scenario: Brushless water pump in dishwasher or washing machine, operating in humid, thermally constrained enclosures. IC Role / Device Role / Timing Role: System-on-chip controller managing pressure-based speed regulation, overtemperature shutdown, and soft-start sequencing. Use Value: On-die op-amp and comparator enable direct shunt current sensing and thermal foldback - no external amplifiers required for Class B safety compliance. |
Use Scenario: Cordless drill/driver with torque-responsive speed control and battery-efficient operation. IC Role / Device Role / Timing Role: Real-time motor controller using ART timer for precise pulse-width modulation and PD7/TDO pin for factory calibration traceability. Use Value: 8KB Flash with IAP allows post-manufacturing tuning of commutation angles and torque curves - enabling one hardware platform across multiple tool models. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar brushless motor control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST7MC2N6 | 16KB Flash, 768B RAM, extended temp range (−40°C to +125°C), LQFP32 package - same peripheral set but higher memory and thermal rating. | Required for under-hood automotive applications or high-ambient industrial environments where 85°C max is insufficient. | Select when firmware complexity exceeds 8KB or ambient temperature exceeds 85°C; pin-compatible drop-in upgrade path exists. |
| STM8AF5269 | 8-bit STM8 core, 32KB Flash, 2KB RAM, integrated LIN transceiver (not just LINSCI logic), 12-bit ADC, and higher PWM resolution (16-bit). | Supports full LIN physical layer compliance and advanced diagnostics (e.g., node addressing, error frame injection) out-of-box. | Choose for new designs needing certified LIN PHY integration and future-proof memory headroom; requires PCB layout change due to QFP48 package. |
Compared with ST7FMC1K4T3, ST7MC2N6 offers scalable memory and extended temperature tolerance while retaining identical peripheral functionality and pinout; STM8AF5269 provides deeper LIN integration and higher-resolution analog/peripheral resources but mandates package and toolchain migration.
Availability
ST7FMC1K4T3 is available at Aetrix Electronics and suitable for industrial fan control, automotive HVAC blowers, home appliance pump drives, and cordless power tool motor controllers requiring stable component supply across long production lifecycles.
Supply support for ST7FMC1K4T3 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 microcontrollers, power management, and automotive ICs with vertical manufacturing and broad industrial IP portfolios.
The ST7MC product line was designed specifically for cost-sensitive, high-volume BLDC motor control applications - emphasizing integrated analog peripherals, motor safety logic, and LIN-ready communication to reduce system-level BOM and design effort.
FAQ
What is the maximum operating frequency of the ST7FMC1K4T3?
The ST7FMC1K4T3 operates at a maximum CPU frequency of 8 MHz when supplied at 4.5–5.5 V. This limit is defined by its internal oscillator architecture and flash memory timing constraints - exceeding 8 MHz risks instruction fetch errors or ADC conversion inaccuracy. External clock sources must also comply with this frequency ceiling.
Does the ST7FMC1K4T3 include a hardware LIN transceiver?
No, the ST7FMC1K4T3 integrates only the LINSCI™ protocol controller (digital logic layer), not the physical transceiver. An external LIN PHY (e.g., TLE6250 or SN65HVDA100) is required for bus-level signaling, ESD protection, and slew-rate control. The LINSCI peripheral handles frame formatting, checksum calculation, and wake-up detection in firmware.
How many high-sink I/O pins does the ST7FMC1K4T3 support?
The ST7FMC1K4T3 supports up to 12 high-sink outputs rated at 20 mA per pin, including PA1, PA2, PA3, PA4, PC5, PC6, PC7, PD1, PD7, PE0, PF4, and PF5. These are explicitly designated (HS) in the pin description tables and are electrically optimized for driving gate driver inputs or LED indicators without external buffers.
Can the ST7FMC1K4T3 perform sensorless BLDC control?
Yes - the ST7FMC1K4T3 supports sensorless operation via its MTC peripheral, which includes dedicated circuitry for back-EMF zero-crossing detection using ADC inputs (e.g., PA5/ARTIC1, PA6/ARTIC2) and programmable blanking windows to suppress commutation noise. Application Note AN2422 details implementation with the on-chip op-amp and comparator.
ST7FMC1K4T3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- ST7
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- LINbusSCI
- Peripherals:
- LVD, Motor Control PWM, POR, PWM, WDT
- Number of I/O:
- 17
- Program Memory Size:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 768 x 8
- Voltage - Supply (Vcc/Vdd):
- 3.8V ~ 5.5V
- Data Converters:
- A/D 8x10b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST7FMC1K4T3 FAQ
1.How can I place an order for ST7FMC1K4T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST7FMC1K4T3 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 ST7FMC1K4T3 reliable?
The price and inventory of ST7FMC1K4T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FMC1K4T3 is usually 5 days.
3.What payment methods are accepted for ST7FMC1K4T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FMC1K4T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST7FMC1K4T3?
ST7FMC1K4T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST7FMC1K4T3 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 ST7FMC1K4T3?
For technical support, including ST7FMC1K4T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FMC1K4T3 requirements.
6.How does Aetrix verify that ST7FMC1K4T3 is sourced from the original manufacturer or authorized distributors?
All ST7FMC1K4T3 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 ST7FMC1K4T3 meets industry standards.
7.What is the process for return or replacement of ST7FMC1K4T3?
All ST7FMC1K4T3 units undergo pre-shipment inspection (PSI). If there is an issue with ST7FMC1K4T3, 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 ST7FMC1K4T3 part is unused and in its original packaging.
Return procedure for ST7FMC1K4T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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