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STMicroelectronics ST72F324K6TC
- Part No.:
- ST72F324K6TC
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST72F324K6TC.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,547
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Product details
Overview
ST72F324K6TC from STMicroelectronics is an 8-bit Flash microcontroller with 16KB program memory, 512-byte RAM, 10-bit ADC (12 input channels), dual 16-bit timers (Timer A and Timer B), SPI and SCI serial interfaces, and PLL-based clock multiplication. It operates from 3.8V to 5.5V across –40°C to +125°C and targets industrial motor control and sensor interface modules requiring deterministic real-time response.
For engineers reviewing the ST72F324K6TC datasheet, ST72F324K6TC pinout, ST72F324K6TC application, or ST72F324K6TC equivalent, this MCU delivers verified in-application programming (IAP), programmable low-voltage detection (LVD) with interrupt capability, and four power-saving modes - Halt, Active-Halt, Wait, and Slow - for embedded systems with strict energy budgets.
Technical Context
The ST72F324K6TC implements the ST7 core with 63 basic instructions and 17 addressing modes, supporting 8×8 unsigned multiply. Its clock system integrates a programmable PLL (2× multiplication), internal RC oscillator, crystal/ceramic resonator support, and clock security system with bypass mode.
Interrupt handling uses a nested controller with 10 vectors plus TRAP and RESET, servicing up to 9 external interrupt lines across 4 vectors. Peripheral timing is managed via two independent 16-bit timers - Timer A (1 capture/1 compare/PWM) and Timer B (2 captures/2 compares/PWM) - both supporting pulse generation and external clock inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ST7 8-bit CISC CPU with 63 instructions and 17 addressing modes |
| Flash Memory | 16KB HD-Flash with read-out protection, 100 write/erase cycles, 20-year data retention at 55°C |
| RAM Size | 512 bytes (including 256-byte stack), volatile storage for variables and context |
| ADC Resolution | 10-bit successive approximation ADC with up to 12 robust analog input channels |
| Timers | Two 16-bit timers: Timer A (1 input capture, 1 output compare, PWM) and Timer B (2 input captures, 2 output compares, PWM) |
| Communication | SPI synchronous interface and SCI asynchronous serial interface (UART-like) |
| Supply Range | 3.8V to 5.5V operation, compatible with standard 5V industrial logic families |
| Temperature Range | –40°C to +125°C ambient, qualified for under-hood automotive and industrial environments |
Pinout & Package
TQFP44 (10 × 10 mm, 0.8 mm pitch) package with 44 leads; pin functions defined per STMicroelectronics datasheet Rev. 5 (April 2008), Section 2 "Pin Description".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power pins for noise isolation; VDD supports 3.8–5.5V operation |
| OSCIN, OSCOUT | Crystal/resonator interface | Connects to external 1–8 MHz crystal or ceramic resonator for main clock source |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered; initiates hardware reset on falling edge |
| PA0–PA7 | Port A I/O lines | 8-bit bidirectional port with alternate functions including ADC inputs and timer outputs |
| PB0–PB7 | Port B I/O lines | 8-bit bidirectional port supporting SPI (MOSI/MISO/SCK), SCI (TXD/RXD), and external interrupts |
| PC0–PC7 | Port C I/O lines | 8-bit bidirectional port with high-sink capability (up to 20 mA per pin) for LED/drivers |
| PD0–PD7 | Port D I/O lines | 8-bit bidirectional port; PD0–PD3 serve as ADC channel inputs (CH0–CH3) |
| PE0–PE3 | Port E I/O lines | 4-bit port with timer A/B capture/compare functions and beeper output |
Key Features
| Feature | Design Value |
|---|---|
| In-Application Programming (IAP) | Enables firmware updates over SCI or SPI without external programmer; critical for field-deployed devices |
| Programmable Low-Voltage Detector (LVD) | Configurable reset threshold with interrupt capability; prevents erratic operation during brown-out conditions |
| Dual 16-bit Timers with PWM | Timer A and Timer B independently support PWM generation, input capture for encoder signals, and pulse-width measurement |
| Four Power-Saving Modes | Halt (CPU off, peripherals active), Active-Halt (CPU off, RAM retained), Wait (clock gated), and Slow (reduced frequency) - each with wake-up on interrupt |
| Enhanced Interrupt Controller | Nested priority handling across 10 vectors; supports fast context switching for real-time task scheduling |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
|
Use Scenario: Closed-loop DC motor speed regulation using hall-effect feedback and PWM drive. IC Role / Device Role / Timing Role: Real-time execution of PID loop (≤100 µs cycle), ADC sampling of current/voltage, and precise PWM generation via Timer B. Use Value: Deterministic timing ensures consistent torque response; 125°C rating enables direct mounting on motor driver PCBs. |
Use Scenario: Battery-powered environmental sensor hub aggregating temperature, humidity, and pressure data. IC Role / Device Role / Timing Role: Low-power coordinator managing periodic ADC conversions, SCI UART transmission, and sleep/wake cycles. Use Value: Active-Halt mode draws <1 µA while retaining RAM; LVD interrupt triggers graceful shutdown before battery depletion. |
| Automotive Body Control Module | Industrial PLC I/O Expansion |
|
Use Scenario: Door lock actuator control with anti-pinch detection and CAN gateway interface (via external transceiver). IC Role / Device Role / Timing Role: GPIO management for solenoid drivers, ADC monitoring of current sense resistors, and SCI communication to main ECU. Use Value: High-sink I/O (20 mA) directly drives small relays; –40°C to +125°C range meets AEC-Q100 Grade 2 requirements. |
Use Scenario: DIN-rail mounted I/O module converting discrete 24V inputs to Modbus RTU over RS-485. IC Role / Device Role / Timing Role: Isolated digital input conditioning, SPI-driven isolated ADC for analog inputs, and SCI-to-RS485 protocol translation. Use Value: Dual timer capture modes measure pulse width of 24V input signals; 16KB Flash accommodates Modbus stack + application logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324B6T6 | Same ST7 core, 16KB Flash, but includes enhanced ESD protection (4kV HBM) and updated silicon revision (B-series) | Preferred for new designs targeting long-term availability and improved latch-up immunity | Select when qualifying for production release after 2008; not drop-in due to minor register mapping changes |
| STM8S105K4T6 | Successor 8-bit STM8 core, 16KB Flash, 2KB RAM, integrated SWIM debug, higher clock speed (16 MHz) | Supports modern toolchains (STVD/STVP), USB DFU, and advanced peripherals like CRC engine and window watchdog | Choose for new designs requiring debug flexibility, larger RAM, or extended lifecycle support beyond ST7 end-of-life |
Compared with ST72F324K6TC, ST72F324B6T6 offers improved robustness for harsh environments, while STM8S105K4T6 provides architectural modernization, larger RAM, and full production support - making it the recommended migration path for new projects.
Availability
ST72F324K6TC is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, automotive body electronics, and PLC I/O expansion requiring stable component supply amid legacy design continuity.
Supply support for ST72F324K6TC 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 analog components for industrial, automotive, and consumer markets.
The ST7 family was engineered for cost-sensitive, real-time embedded control applications demanding high reliability, low power, and seamless integration with analog peripherals - especially where deterministic timing and field-programmability are essential.
FAQ
Is ST72F324K6TC still in production?
No - ST72F324K6TC is marked "Not for New Design" per its April 2008 datasheet. STMicroelectronics discontinued the ST7 family in favor of the STM8 platform. Aetrix Electronics maintains limited legacy stock for repair and maintenance of existing equipment, with full traceability and date-code documentation.
What debugging interface does ST72F324K6TC support?
The device supports In-Circuit Testing (ICT) and In-Circuit Programming (ICP) via the ICC (In-Circuit Communication) interface using the dedicated ICCSEL/VPP pin. It does not include SWD, JTAG, or SWIM; debugging requires ST's proprietary ST-LINK-compatible ICC adapters and STVP software.
Can ST72F324K6TC operate at 3.3V?
No - the absolute minimum supply voltage is 3.8V per Section 12.3 of the datasheet. Operation below 3.8V risks undefined behavior, failed LVD detection, and unreliable Flash programming. For 3.3V systems, consider STM8L or STM32L series MCUs with true 1.65–3.6V operation.
Does ST72F324K6TC support CAN bus communication?
No - the device lacks native CAN controller or transceiver. It provides only SPI and SCI (UART) interfaces. CAN functionality requires external CAN controller (e.g., MCP2515) interfaced via SPI, or migration to STM8AF/STM32 automotive-grade MCUs with integrated CAN FD controllers.
ST72F324K6TC 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:
- 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F324K6TC FAQ
1.How can I place an order for ST72F324K6TC through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324K6TC 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 ST72F324K6TC reliable?
The price and inventory of ST72F324K6TC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324K6TC is usually 5 days.
3.What payment methods are accepted for ST72F324K6TC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324K6TC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324K6TC?
ST72F324K6TC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324K6TC 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 ST72F324K6TC?
For technical support, including ST72F324K6TC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324K6TC requirements.
6.How does Aetrix verify that ST72F324K6TC is sourced from the original manufacturer or authorized distributors?
All ST72F324K6TC 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 ST72F324K6TC meets industry standards.
7.What is the process for return or replacement of ST72F324K6TC?
All ST72F324K6TC units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324K6TC, 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 ST72F324K6TC part is unused and in its original packaging.
Return procedure for ST72F324K6TC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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