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STMicroelectronics ST72F324K6T6/TR
- Part No.:
- ST72F324K6T6/TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST72F324K6T6/TR.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,897
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Product details
Overview
ST72F324K6T6/TR from STMicroelectronics is an 8-bit Flash microcontroller with 32KB HD-Flash, 1KB RAM, 10-bit ADC (12-channel), four timers (including RTC/beeper), SPI/SCI interfaces, and programmable LVD/AVD supervision - deployed in industrial motor control and sensor interface modules operating from 3.8V to 5.5V across –40°C to +125°C.
For engineers reviewing the ST72F324K6T6/TR datasheet, ST72F324K6T6/TR pinout, ST72F324K6T6/TR application, or ST72F324K6T6/TR equivalent, this MCU supports in-application programming, PLL-based clock multiplication, nested interrupts with 10 vectors, and low-power modes (Halt/Wait/Slow) for embedded control systems requiring deterministic timing and robust analog integration.
Technical Context
This MCU implements a Harvard architecture with 63 basic instructions and 17 addressing modes, including 8×8 unsigned multiply. Its clock system integrates crystal/resonator oscillators, internal RC, PLL (2× multiplication), and clock security with bypass capability.
Interrupt handling uses a nested controller supporting 9 external interrupt lines on 4 vectors, TRAP, RESET, and priority-based servicing. Peripheral integration includes two independent 16-bit timers (Timer A/B) with input capture, output compare, PWM, and pulse generation - all synchronized to the main clock controller featuring real-time base, beep, and clock-out functions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core | 8-bit ST7 CPU with 63 instructions and 17 addressing modes - enables compact firmware and deterministic cycle-counted control loops. |
| Flash Memory | 32KB High-Density Flash with read-out protection and 100-cycle endurance - supports field firmware updates via IAP/ICP. |
| RAM | 1024 bytes (256-byte stack) - sufficient for real-time control state variables and small buffers in sensor/motor applications. |
| ADC | 10-bit SAR ADC with up to 12 input channels - provides precision analog sensing for temperature, current, or position feedback. |
| Timers | Four timers: Main Clock Controller (RTC/beep/clock-out), configurable WDG, Timer A (1 IC/1 OC), Timer B (2 IC/2 OC) - enables multi-rate timing, PWM generation, and watchdog safety. |
| Communication | SPI (synchronous master/slave) and SCI (asynchronous UART-like) - supports daisy-chain sensor networks and host MCU communication. |
| Supply Range | 3.8V to 5.5V operation with enhanced LVD (programmable reset thresholds) and AVD (interrupt-capable voltage monitoring) - ensures reliable startup and brown-out recovery in noisy industrial rails. |
Pinout & Package
TQFP44 (10 × 10 mm, 0.8 mm pitch) package with 44 leads; lead-free and RoHS-compliant per device marking and packaging specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains support stable core/peripheral operation; decoupling required per layout guidelines. |
| OSCIN/OSCOUT | Crystal/resonator interface | Supports 1–8 MHz external crystals or ceramic resonators; internal oscillator available as fallback. |
| RESET | Asynchronous active-low reset | Hardware-initiated system restart; compatible with push-button or supervisor IC assertion. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | Multi-function I/O ports | 32 bidirectional lines with alternate functions (SPI/SCI/timer I/O); 12 support high-sink (20 mA) for direct LED/relay drive. |
| CLKOUT | Clock output | Programmable division of CPU clock - used for trace debugging, synchronization, or driving secondary logic. |
Key Features
| Feature | Design Value |
|---|---|
| In-Application Programming (IAP) | Enables firmware updates without external programmer - critical for remote field maintenance and OTA-like deployments. |
| Enhanced Low Voltage Detector (LVD) | Programmable reset threshold with interrupt capability - allows graceful shutdown or safe state entry before brown-out. |
| Real-Time Clock & Beeper (MCC/RTC) | Integrated timekeeping and audible alert generation - eliminates need for external RTC or buzzer drivers in HMI or alarm systems. |
| Four Power Saving Modes | Halt, Active-Halt, Wait, Slow - reduce current to µA range while retaining RAM and interrupt wake-up capability for battery-backed nodes. |
| 16-bit Timer B with dual input capture | Simultaneous edge detection on two inputs - enables precise measurement of pulse width, period, or phase difference in motor encoder interfaces. |
Applications
| Industrial Motor Control | Sensor Interface Module |
|---|---|
Use Scenario: Closed-loop speed regulation of BLDC motors using hall-effect encoder feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Central controller executing commutation logic, ADC sampling of current/voltage, and real-time PWM update at 20 kHz. Use Value: Integrated 16-bit timers with input capture and 10-bit ADC enable precise rotor position tracking and current loop control without external timing ICs. | Use Scenario: Multi-sensor data acquisition node aggregating temperature, humidity, and analog pressure readings for industrial IoT gateway. IC Role / Device Role / Timing Role: Sensor hub managing sequential ADC conversions, SPI communication with local sensors, and SCI transmission to host MCU. Use Value: 12-channel ADC input multiplexing and hardware SPI/SCI peripherals reduce external component count and PCB footprint. |
| Smart Power Metering | Embedded HMI Panel |
Use Scenario: Residential electricity meter with tamper detection, energy accumulation, and optical IR communication. IC Role / Device Role / Timing Role: System-on-chip managing metrology ADC interface (via external sigma-delta), LVD supervision, and IR modulation timing. Use Value: Programmable LVD and AVD provide dual-rail monitoring for anti-tampering; RTC enables accurate billing interval timestamping. | Use Scenario: Local operator panel with keypad scan, LED status indicators, buzzer alerts, and serial display interface. IC Role / Device Role / Timing Role: Human-machine interface controller handling debounced key inputs, driving 12 high-sink outputs, and generating beeper tones. Use Value: On-chip beeper generator and 20 mA sink capability eliminate external driver transistors and tone generators. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324B6T6 | Successor part with improved ESD performance, updated flash endurance (1,000 cycles), and extended qualification for industrial temp range. | Designed for new designs; supports same pinout and peripheral register map but requires updated toolchain configuration. | Select when initiating new product development requiring long-term supply assurance and enhanced reliability. |
| STM8S105K4T6C | 32MHz STM8 core, 16KB Flash, 2KB RAM, integrated EEPROM, higher ADC throughput (1.2 MSPS), and enhanced debug interface (SWIM). | Offers superior processing bandwidth and non-volatile data storage - suitable where firmware complexity or data logging exceeds ST7 limits. | Choose when migrating legacy ST7 code to modern toolchains or requiring EEPROM-backed configuration storage. |
Compared with ST72F324K6T6/TR, ST72F324B6T6 delivers higher flash endurance and qualification rigor for new production, while STM8S105K4T6C provides greater memory, speed, and integrated EEPROM - making it preferable for feature-rich HMI or data-logging upgrades.
Availability
ST72F324K6T6/TR is available at Aetrix Electronics and suitable for industrial motor control, smart metering, sensor interface modules, and embedded HMI panels requiring stable component supply across extended temperature ranges and long lifecycle commitments.
Supply support for ST72F324K6T6/TR 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 industrial, automotive, and consumer markets.
The ST7 family was engineered for cost-sensitive, resource-constrained embedded control applications demanding high analog integration, low-power operation, and robust flash programmability - particularly in white goods, industrial automation, and utility metering.
FAQ
Is ST72F324K6T6/TR still recommended for new designs?
No - STMicroelectronics explicitly marks this device as "NOT FOR NEW DESIGN" in its official documentation. The ST72F324B6T6 is the designated successor with enhanced reliability, flash endurance, and qualification. For new projects, migration to the ST72F324B series or STM8S platform is advised to ensure long-term supply and technical support.
What debug and programming interfaces does ST72F324K6T6/TR support?
It supports In-Circuit Programming (ICP) via the ICC interface using the dedicated ICCSEL/VPP pin and standard SWIM-compatible programmers. In-Application Programming (IAP) is also supported through user firmware, enabling field updates without physical reprogramming hardware. No JTAG or SWD interface is present.
Does ST72F324K6T6/TR include hardware EEPROM?
No - it does not integrate dedicated EEPROM memory. Data retention relies on Flash memory sectors configured for pseudo-EEPROM emulation using ST-provided IAP routines. This approach trades write endurance (100 cycles) and latency for cost and die size reduction versus true EEPROM.
Can ST72F324K6T6/TR operate reliably at 125°C ambient temperature?
Yes - it is fully specified for operation from –40°C to +125°C ambient, with validated electrical characteristics and timing margins across that range. The enhanced LVD and AVD circuits remain functional at max temperature, and Flash data retention is guaranteed for 20 years at 55°C (derated per JEDEC JESD22-A108).
ST72F324K6T6/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- ST7
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 24
- 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 8x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F324K6T6/TR FAQ
1.How can I place an order for ST72F324K6T6/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324K6T6/TR 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 ST72F324K6T6/TR reliable?
The price and inventory of ST72F324K6T6/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324K6T6/TR is usually 5 days.
3.What payment methods are accepted for ST72F324K6T6/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324K6T6/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324K6T6/TR?
ST72F324K6T6/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324K6T6/TR 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 ST72F324K6T6/TR?
For technical support, including ST72F324K6T6/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324K6T6/TR requirements.
6.How does Aetrix verify that ST72F324K6T6/TR is sourced from the original manufacturer or authorized distributors?
All ST72F324K6T6/TR 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 ST72F324K6T6/TR meets industry standards.
7.What is the process for return or replacement of ST72F324K6T6/TR?
All ST72F324K6T6/TR units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324K6T6/TR, 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 ST72F324K6T6/TR part is unused and in its original packaging.
Return procedure for ST72F324K6T6/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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