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STMicroelectronics ST72F324K4T6
- Part No.:
- ST72F324K4T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST72F324K4T6.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,444
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Product details
Overview
ST72F324K4T6 from STMicroelectronics is an 8-bit microcontroller featuring 8 KB Flash memory, 384 bytes RAM, 10-bit ADC with up to 12 input channels, dual 16-bit timers (Timer A and Timer B), SPI and SCI serial interfaces, and four power-saving modes. It operates across 3.8 V to 5.5 V and supports industrial temperature range (−40°C to +125°C), targeting embedded control in motor drives and sensor interface modules.
For engineers reviewing the ST72F324K4T6 datasheet, ST72F324K4T6 pinout, ST72F324K4T6 application, or ST72F324K4T6 equivalent, this MCU delivers deterministic real-time control with nested interrupts, programmable low-voltage detection, and in-application programming-critical for cost-sensitive industrial firmware updates and battery-aware system design.
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 internal RC, crystal/ceramic resonator, and PLL-based 2× frequency multiplication for flexible timing control.
Interrupt handling uses a nested controller with 10 vectors plus TRAP and RESET, supporting 9 external interrupt lines mapped across 4 vectors. Peripheral control is register-mapped with dedicated I/O port configuration registers enabling bidirectional operation, alternate function selection, and high-sink output capability (12 lines).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with Harvard bus, 63 instructions, 17 addressing modes |
| Flash Memory | 8 KB HD-Flash with read-out protection, 100 write/erase cycles, 20-year data retention at 55°C |
| RAM Size | 384 bytes (including 256-byte stack), volatile storage for variables and context |
| ADC Resolution | 10-bit successive approximation ADC with up to 12 robust analog inputs |
| Timers | Two 16-bit timers: Timer A (1 capture/1 compare/PWM), Timer B (2 capture/2 compare/PWM) |
| Communication | SPI synchronous interface and SCI asynchronous UART-compatible interface |
| Supply Range | 3.8 V to 5.5 V - compatible with standard 5 V logic systems and tolerant of rail droop |
| Temperature Range | −40°C to +125°C - qualified for under-hood automotive and industrial ambient conditions |
Pinout & Package
TQFP32 (7 × 7 mm, 0.8 mm pitch) package with 32-pin layout optimized for compact industrial control PCBs. All I/O pins support multifunctional configuration including alternate peripheral mapping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power pins ensure stable core voltage delivery and noise decoupling |
| PA0–PA7 | Port A I/O lines | Bidirectional with alternate functions: ADC inputs, timer inputs/outputs, SCI TX/RX |
| PB0–PB7 | Port B I/O lines | Includes high-sink outputs (12 mA), external interrupt sources, and SPI signals |
| PC0–PC7 | Port C I/O lines | Supports timer A/B channels, beeper output, and clock-out functionality |
| RESET | Active-low reset input | Asynchronous external reset with internal LVD/AVD supervision and watchdog integration |
| OSCIN/OSCOUT | Crystal/resonator interface | Supports 1–8 MHz crystals or ceramic resonators; bypass mode accepts external clock |
| ICCSEL/VPP | In-circuit programming control | Selects ICC programming mode; doubles as VPP during Flash programming |
Key Features
| Feature | Design Value |
|---|---|
| In-Application Programming (IAP) | Enables field firmware updates without removing MCU; uses dedicated Flash sector and boot loader |
| Enhanced Low-Voltage Detector (LVD) | Programmable reset thresholds with interrupt capability-prevents erratic operation during brownout |
| Four Power-Saving Modes | Halt, Active-Halt, Wait, Slow-reducing current to ≤1.5 µA (Halt) while retaining RAM and register state |
| Nested Interrupt Controller | Hardware prioritization across 10 vectors ensures deterministic response to time-critical events |
| Main Clock Controller (MCC) | Integrates real-time base, beep generator, and clock-out signal-eliminates need for external timing ICs |
Applications
| Motor Control Interface | Sensor Signal Acquisition |
|---|---|
Use Scenario: Brushless DC motor commutation using Hall-effect feedback and PWM drive signals. IC Role / Device Role / Timing Role: Real-time execution of commutation logic, ADC sampling of current/voltage, and precise PWM generation via Timer B. Use Value: 10-bit ADC resolution enables accurate current sensing; dual 16-bit timers provide independent phase timing with <1 µs jitter. |
Use Scenario: Industrial temperature and pressure monitoring with analog sensor front-end. IC Role / Device Role / Timing Role: Analog signal digitization, digital filtering, and RS-232/SCI transmission to host PLC. Use Value: 12-channel ADC input flexibility supports multi-sensor configurations; LVD/AVD supervision ensures reliable operation during supply transients. |
| Smart Power Supply Monitoring | Legacy Industrial Communication Node |
Use Scenario: AC/DC power supply with overvoltage, overtemperature, and fan-failure detection. IC Role / Device Role / Timing Role: Supervisory controller managing fault detection, relay actuation, and status LED sequencing. Use Value: High-sink I/O (12 mA) directly drives indicator LEDs and small relays; four power modes extend uptime in standby states. |
Use Scenario: Protocol translation between legacy 4–20 mA field devices and Modbus RTU master. IC Role / Device Role / Timing Role: SCI-based UART bridging with configurable baud rate and parity; SPI used for local EEPROM configuration storage. Use Value: SCI supports full-duplex asynchronous communication at up to 115.2 kbps; SPI clock polarity/phase configurability ensures interoperability with diverse peripherals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324B4T6 | Successor device with enhanced ESD immunity (4 kV HBM), updated Flash endurance (1,000 cycles), and extended qualification per AEC-Q100 Grade 2 | Required for new designs targeting automotive under-hood use or higher reliability standards | Select when long-term program retention, automotive qualification, or improved latch-up immunity is mandatory |
| STM8S003F3P6 | 32 MHz STM8 core, 8 KB Flash, 1 KB RAM, integrated SWIM debug interface, no LVD interrupt capability | Better suited for high-throughput control loops but lacks auxiliary voltage detector (AVD) and programmable LVD thresholds | Prefer for cost-sensitive consumer applications where debug accessibility and raw speed outweigh precision supply monitoring needs |
Compared with ST72F324K4T6, the ST72F324B4T6 offers higher Flash endurance and automotive qualification, while the STM8S003F3P6 trades AVD/LVD flexibility for faster clocking and modern debug-but requires redesign due to non-pin-compatible packaging and register map differences.
Availability
ST72F324K4T6 is available at Aetrix Electronics and suitable for motor control interface, sensor signal acquisition, smart power supply monitoring, and legacy industrial communication node applications requiring stable component supply and long-lifecycle support.
Supply support for ST72F324K4T6 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 management ICs, sensors, and discrete components for industrial, automotive, and consumer markets.
The ST7 family was engineered for cost-effective, deterministic 8-bit control in resource-constrained embedded systems-emphasizing low-power operation, on-chip analog integration, and robust in-field programmability for industrial automation and appliance control.
FAQ
Is ST72F324K4T6 still recommended for new designs?
No. STMicroelectronics explicitly marks ST72F324K4T6 as "NOT FOR NEW DESIGN" in its official documentation. The ST72F324Bx series replaces it with improved Flash endurance, ESD performance, and qualification scope. Aetrix Electronics maintains legacy supply for existing production but advises migration paths for new projects.
What programming interfaces does ST72F324K4T6 support?
It supports In-Circuit Programming (ICP) via the ICC interface using the ICCSEL/VPP pin and standard 5-wire connection (VDD, VSS, ICCCLK, ICCDAT, RESET). In-Application Programming (IAP) is also supported through a bootloader residing in protected Flash, enabling firmware updates over SCI or SPI without external programmers.
Does ST72F324K4T6 include hardware debugging capabilities?
No. Unlike later STMicro families (e.g., STM8, STM32), the ST72F324K4T6 lacks on-chip debug circuitry such as SWIM or JTAG. Development relies on in-circuit emulators (ICE) or ROM-based debug monitors; real-time tracing and breakpoint control require external tools like ST's ST7 ICE or third-party compatible adapters.
Can ST72F324K4T6 operate reliably at 5.5 V and 125°C?
Yes. Electrical characterization in the datasheet confirms full functionality across 3.8 V–5.5 V supply and −40°C to +125°C ambient temperature. Key parameters-including Flash access time, ADC accuracy, and I/O sink current-are specified and tested at these extremes, making it suitable for under-hood automotive and high-temperature industrial enclosures.
ST72F324K4T6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- ST7
- Packaging:
- Tray
- 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:
- 16KB (16K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 512 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:
ST72F324K4T6 FAQ
1.How can I place an order for ST72F324K4T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324K4T6 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 ST72F324K4T6 reliable?
The price and inventory of ST72F324K4T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324K4T6 is usually 5 days.
3.What payment methods are accepted for ST72F324K4T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324K4T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324K4T6?
ST72F324K4T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324K4T6 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 ST72F324K4T6?
For technical support, including ST72F324K4T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324K4T6 requirements.
6.How does Aetrix verify that ST72F324K4T6 is sourced from the original manufacturer or authorized distributors?
All ST72F324K4T6 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 ST72F324K4T6 meets industry standards.
7.What is the process for return or replacement of ST72F324K4T6?
All ST72F324K4T6 units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324K4T6, 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 ST72F324K4T6 part is unused and in its original packaging.
Return procedure for ST72F324K4T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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