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STMicroelectronics ST7FMC2S6T3
- Part No.:
- ST7FMC2S6T3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
ST7FMC2S6T3.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,113
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Product details
Overview
ST7FMC2S6T3 from STMicroelectronics is an 8-bit motor control MCU with nested interrupts, 32KB Flash, 1024B RAM, 10-bit ADC (16-channel), and integrated brushless DC (BLDC) motor controller (MTC) supporting trapezoidal/sine-wave commutation. It features five timers-including 16-bit Timer A/B, 8-bit PWM auto-reload timer (ART), and main clock controller-and dual communication interfaces: SPI and LINSCI™. Used in industrial BLDC drives for HVAC blowers and power tools.
For engineers reviewing the ST7FMC2S6T3 datasheet, ST7FMC2S6T3 pinout, ST7FMC2S6T3 application, or ST7FMC2S6T3 equivalent, key selection criteria include MTC peripheral integration, 20mA high-sink PWM outputs (6 channels), LIN bus master/slave capability, 4.5–5.5V operation at ≤8MHz, and -40°C to +125°C extended temperature grade.
Technical Context
The ST7FMC2S6T3 implements a dedicated Motor Control Peripheral (MTC) with permanent magnet motor coprocessor logic, including multiplier, programmable filters, blanking windows, and event counters. Its MTC supports sensorless and Hall-based rotor position detection via four analog inputs and provides six high-sink PWM outputs with asynchronous emergency stop and write-once safety registers.
It integrates a LINSCI™ interface compliant with LIN 2.0/2.1, supporting both master and slave modes with automatic checksum and frame synchronization. The 10-bit ADC includes dedicated input routing for current/voltage sensing in motor phase legs, synchronized with PWM timing for precise current sampling.
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 - enables compact, deterministic motor control firmware. |
| Flash Memory | 32KB dual-voltage Flash with IAP/ICP support - allows field firmware updates and secure code protection via read-out protection. |
| RAM | 1024 bytes (including 256-byte stack) - sufficient for real-time BLDC FOC or trapezoidal commutation state variables and buffers. |
| ADC | 10-bit SAR ADC with 16 input channels and hardware-triggered sampling - supports simultaneous current sensing across multiple phases with minimal CPU overhead. |
| MTC Outputs | 6 high-sink PWM outputs (20mA each) with dead-time insertion and emergency stop - directly drives gate drivers in 3-phase inverter without external logic. |
| Operating Voltage | 4.5V to 5.5V at fCPU ≤ 8MHz - compatible with standard 5V industrial power rails and simplifies supply design. |
| Temperature Range | -40°C to +125°C - qualified for under-hood automotive auxiliary motors and industrial motor drives in harsh thermal environments. |
Pinout & Package
LQFP64 (14 × 14 mm, 0.5 mm pitch) package with 60 usable I/O pins, including 41 alternate function lines and 12 high-sink outputs. Pin functions validated per ST document RM0013 (Rev 13, April 2009), Figures 3 and 7.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PA0–PA6 (PWM0–PWM3, ARTIC1/2) | Motor phase PWM outputs & ART input capture | Drive upper/lower inverter switches; ARTIC1/2 synchronize ADC sampling to PWM zero-crossing for current reconstruction. |
| PC0–PC6 (MCPWMU/V/W, MCCFI0/1, OAZ) | MTC dedicated outputs & analog feedback inputs | Direct connection to 3-phase gate driver enable/control; OAZ provides zero-crossing detection output for sensorless commutation. |
| PE0–PE5, PD0–PD3, PF0–PF1 | External interrupt & Hall/sensor inputs | Support 16 external interrupt lines across 3 vectors - configured for Hall sensor edges or encoder quadrature signals. |
| PB0–PB7 | SPI, LINSCI™, and motor current sense interface | PB4–PB7 implement full-duplex SPI (MISO/MOSI/SCK/SS); PB0–PB3 route MCIA/B/C for analog current sensing amplifiers. |
| PH0–PH7, PG0–PG7 | General-purpose I/O with high-sink capability | 12 pins marked (HS) support 20mA sink - used for LED status, brake control, or auxiliary digital outputs in motor subsystems. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated BLDC Motor Controller (MTC) | Dedicated hardware for trapezoidal/sine-wave commutation, eliminating need for external FPGA or discrete logic in cost-sensitive drives. |
| LINSCI™ Interface | Fully autonomous LIN 2.x master/slave with automatic header detection, checksum generation, and error recovery - reduces host MCU software load in distributed motor nodes. |
| Operational Amplifier & Comparator | On-chip OA and comparator with rail-to-rail input - enables direct current sensing and overcurrent protection without external op-amps. |
| In-Circuit Debug (ICD) | Hardware debug module supporting breakpoint, step-execution, and memory inspection - accelerates BLDC algorithm validation and field calibration. |
| Enhanced Power Management | Four low-power modes (Halt, Active-halt, Wait, Slow) with fast wake-up (<2µs from Halt) - extends battery life in portable power tools and cordless appliances. |
Applications
| Industrial HVAC Blowers | Power Tool Motor Drives |
|---|---|
|
Use Scenario: Variable-speed centrifugal blower in commercial HVAC systems requiring quiet, energy-efficient airflow control. IC Role / Device Role / Timing Role: Primary motor controller executing closed-loop speed regulation using Hall sensor feedback and PWM-modulated 3-phase inverter. Use Value: Integrated MTC and 6-channel high-sink PWM eliminate external gate driver logic; LINSCI™ enables centralized system-level diagnostics via building management network. |
Use Scenario: Cordless drill/driver with torque-limited start-up and electronic braking. IC Role / Device Role / Timing Role: Real-time commutation controller managing 3-phase BLDC motor, battery voltage monitoring, and user interface via LIN-connected display. Use Value: On-chip operational amplifier and comparator provide analog current limiting; 20mA high-sink outputs drive MOSFET gates directly, reducing BOM count and PCB area. |
| Automotive Auxiliary Pumps | Home Appliance Fan Controllers |
|
Use Scenario: Electric coolant pump in 12V mild-hybrid vehicles operating under engine bay thermal stress. IC Role / Device Role / Timing Role: Safety-critical motor controller implementing ASIL-B–compatible emergency stop, write-once configuration registers, and temperature-compensated PWM. Use Value: -40°C to +125°C rating and asynchronous emergency stop ensure fail-safe shutdown during overtemperature or stall conditions. |
Use Scenario: Smart ceiling fan with multi-speed profiles, soft-start, and noise-optimized commutation. IC Role / Device Role / Timing Role: Sensorless BLDC controller using ADC-sampled back-EMF zero-crossing detection and ART-timed PWM modulation. Use Value: Dedicated blanking windows and event counters in MTC suppress false zero-crossing triggers during PWM switching transients, improving low-speed stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar BLDC motor control applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STSPIN32F0A | Integrated 3-phase gate driver + ARM Cortex-M0 core; no LINSCI™; 64KB Flash | Targeted at higher-power (>300W) inverter designs requiring embedded gate driving and advanced FOC algorithms | Select when needing integrated gate drivers and modern ARM toolchain support; not drop-in compatible due to architecture and pinout differences. |
| Infineon XMC4200-F64K256 | 32-bit ARM Cortex-M4; 256KB Flash; CCU8 timer unit for advanced PWM; no on-chip LINPHY | Used in vector-controlled PMSM drives requiring floating-point math and Ethernet/USB connectivity | Choose for complex field-oriented control or multi-axis coordination; requires external LIN transceiver and additional power stage components. |
Compared with ST7FMC2S6T3, STSPIN32F0A reduces external component count but lacks LIN bus integration, while XMC4200-F64K256 offers superior computational performance at the cost of higher BOM complexity and no native LIN protocol handling.
Availability
ST7FMC2S6T3 is available at Aetrix Electronics and suitable for industrial HVAC blowers, power tool motor drives, and automotive auxiliary pumps requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ST7FMC2S6T3 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 ICs, sensors, and automotive-grade components since 1987.
The ST7MC family was engineered specifically for cost-optimized, high-reliability BLDC motor control in industrial and automotive auxiliary systems - prioritizing integrated peripherals, robust fault handling, and simplified PCB layout over general-purpose computing features.
FAQ
What is the maximum operating frequency of the ST7FMC2S6T3?
The ST7FMC2S6T3 operates at up to 8 MHz CPU frequency when supplied with 4.5–5.5 V. This limit is defined by its internal oscillator architecture and electrical characteristics in the -40°C to +125°C range. Higher frequencies are not supported - exceeding 8 MHz risks timing violation in critical peripherals like the MTC and ADC.
Does the ST7FMC2S6T3 support sensorless BLDC commutation?
Yes. The MTC peripheral includes dedicated circuitry for sensorless operation: four analog inputs for back-EMF sampling, programmable blanking windows to suppress PWM noise, and event counters for zero-crossing detection. The OAZ output provides a hardware-generated commutation trigger signal synchronized to rotor position.
Can the LINSCI™ interface operate as both master and slave?
Yes. The LINSCI™ peripheral supports full LIN 2.0/2.1 protocol in both master and slave modes, including automatic header detection, checksum calculation (classic/enhanced), and frame synchronization. No external LIN transceiver is required - only a single-pin connection to the LIN bus via an external pull-up resistor.
What debug capabilities does the ST7FMC2S6T3 provide?
The device includes an on-chip Debug Module (DM) supporting in-circuit debugging (ICD) via the ICC interface. It enables non-intrusive breakpoints, single-stepping, register/memory inspection, and real-time variable monitoring - all accessible through ST's STVP or third-party tools compliant with the ST7 ICC Protocol Reference Manual.
ST7FMC2S6T3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 44-LQFP
- Series:
- ST7
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- LINbusSCI, SPI
- Peripherals:
- LVD, Motor Control PWM, POR, PWM, WDT
- Number of I/O:
- 26
- Program Memory Size:
- 32KB (32K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 1K x 8
- Voltage - Supply (Vcc/Vdd):
- 3.8V ~ 5.5V
- Data Converters:
- A/D 11x10b
- Oscillator Type:
- External
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST7FMC2S6T3 FAQ
1.How can I place an order for ST7FMC2S6T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST7FMC2S6T3 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 ST7FMC2S6T3 reliable?
The price and inventory of ST7FMC2S6T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST7FMC2S6T3 is usually 5 days.
3.What payment methods are accepted for ST7FMC2S6T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST7FMC2S6T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST7FMC2S6T3?
ST7FMC2S6T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST7FMC2S6T3 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 ST7FMC2S6T3?
For technical support, including ST7FMC2S6T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST7FMC2S6T3 requirements.
6.How does Aetrix verify that ST7FMC2S6T3 is sourced from the original manufacturer or authorized distributors?
All ST7FMC2S6T3 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 ST7FMC2S6T3 meets industry standards.
7.What is the process for return or replacement of ST7FMC2S6T3?
All ST7FMC2S6T3 units undergo pre-shipment inspection (PSI). If there is an issue with ST7FMC2S6T3, 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 ST7FMC2S6T3 part is unused and in its original packaging.
Return procedure for ST7FMC2S6T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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