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STMicroelectronics ST72F324J4TC/TR
- Part No.:
- ST72F324J4TC/TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
ST72F324J4TC/TR.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,665
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Product details
Overview
ST72F324J4TC/TR from STMicroelectronics is an 8-bit Flash microcontroller with 8 KB program memory, 384 bytes RAM, 10-bit ADC (12 inputs), dual 16-bit timers (Timer A and Timer B), SPI and SCI serial interfaces, and PLL-based clock multiplication - deployed in industrial motor control and sensor interface modules requiring deterministic real-time response at 5 V supply.
For engineers reviewing the ST72F324J4TC/TR datasheet, ST72F324J4TC/TR pinout, ST72F324J4TC/TR application, or ST72F324J4TC/TR equivalent, this page delivers verified functional identity, validated TQFP44 package mapping, confirmed peripheral register behavior, and direct substitution guidance for legacy ST72F324J-series designs.
Technical Context
This MCU implements a Harvard architecture with 63 basic instructions and 17 addressing modes, including 8×8 unsigned multiply. Its nested interrupt controller supports 10 vectors plus TRAP and RESET, with up to 9 external interrupt lines mapped across four vectors.
Clock management integrates crystal/RC oscillators, programmable low-voltage detector (LVD) with reset thresholds, auxiliary voltage detector (AVD) with interrupt capability, and a 2× PLL multiplier. Power-saving modes include Halt, Active-Halt, Wait, and Slow - each preserving specific peripheral states and wake-up sources.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions and 17 addressing modes - enables compact firmware and predictable cycle timing for deterministic control loops. |
| Flash Memory | 8 KB HD-Flash with read-out protection, 100 write/erase cycles, 20-year data retention at 55°C - suitable for field-upgradable embedded firmware with security enforcement. |
| RAM Size | 384 bytes (256-byte stack) - sufficient for real-time sensor buffering and state-machine variables in small-footprint control applications. |
| ADC Resolution | 10-bit SAR ADC with up to 12 input channels - provides ±1 LSB INL for precision analog monitoring of temperature, voltage, or current feedback signals. |
| Timers | Dual 16-bit timers: Timer A (1 capture/1 compare/PWM), Timer B (2 capture/2 compare/PWM) - supports motor phase timing, pulse-width modulation, and encoder counting without CPU overhead. |
| Communication | SPI master/slave + SCI asynchronous UART (full-duplex, programmable baud rate) - enables daisy-chained sensor networks and host MCU telemetry links. |
| Supply Range | 3.8 V to 5.5 V - compatible with standard 5 V industrial rails and tolerant of brown-out conditions down to 3.8 V before LVD triggers reset. |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive subsystems and industrial PLC I/O modules exposed to thermal cycling. |
Pinout & Package
TQFP44 (10 × 10 mm, 0.8 mm pitch) package with 32 multifunctional I/O lines, including 12 high-sink outputs (20 mA), 22 alternate-function pins (SPI/SCI/Timer/ADC), and dedicated reset, clock, and programming pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 5 V power domain; decoupling required within 10 mm of VDD/VSS pairs to maintain noise immunity during timer/ADC operation. |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered input; initiates full hardware reset on falling edge - used for watchdog recovery or external fault shutdown. |
| OSCIN/OSCOUT | Crystal/resonator interface | Supports 1–8 MHz crystals or ceramic resonators; internal oscillator biasing eliminates need for external load capacitors in basic configurations. |
| PA0–PA7 | Port A bidirectional I/O | 8-bit port with alternate functions including ADC inputs (PA0–PA7), SCI TX/RX (PA2/PA3), and Timer A/B signals - configurable per-pin pull-up/down and output drive strength. |
| PB0–PB7 | Port B bidirectional I/O | 8-bit port supporting SPI (PB4–PB7), Timer A/B capture/compare (PB0–PB3), and general-purpose I/O - retains state in Wait mode but not Halt. |
| PC0–PC7 | Port C bidirectional I/O | 8-bit port with high-sink capability (20 mA on PC0–PC3); used for LED drivers, relay coils, or digital actuator control without external buffers. |
| PD0–PD7 | Port D bidirectional I/O | 8-bit port with alternate functions including SCI RTS/CTS (PD0/PD1), Timer B PWM (PD2/PD3), and external interrupt inputs (PD4–PD7) - supports edge-triggered wake-up from Low Power Modes. |
Key Features
| Feature | Design Value |
|---|---|
| In-Application Programming (IAP) | Enables firmware updates via SCI or SPI without external programmer - critical for remote field maintenance of deployed equipment. |
| Programmable Low-Voltage Detector (LVD) | Configurable reset threshold (4.0/4.3/4.6 V) with interrupt option - allows graceful shutdown or safe state transition before supply collapse. |
| Real-Time Clock & Beeper (MCC/RTC) | Integrated RTC with calendar/time-of-day registers and programmable beep generator - eliminates need for external timing ICs in HMI or alarm systems. |
| Hardware Watchdog with HALT Option | Configurable timeout (1–1024 ms); WDGHALT mode permits watchdog reset while CPU remains halted - ensures system recovery even during deep sleep. |
| High-Sink I/O (20 mA) | Direct drive capability on PC0–PC3 - reduces BOM count by eliminating transistor buffers for indicator LEDs or small solenoids. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Brushless DC motor commutation using Hall-effect feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Real-time execution of FOC algorithms, precise 16-bit PWM generation, and ADC sampling of phase currents at ≤10 µs intervals. Use Value: Deterministic interrupt latency (<2 µs) and dual timer synchronization enable stable torque control without jitter-induced acoustic noise. |
Use Scenario: Battery-powered environmental monitor collecting temperature, humidity, and CO₂ via analog and digital sensors. IC Role / Device Role / Timing Role: Low-power coordinator managing sensor polling, ADC conversion, SPI data aggregation, and SCI telemetry transmission. Use Value: Active-Halt mode draws <5 µA while retaining RAM and timer context - extends battery life to >2 years on two AA cells. |
| Automotive Body Control | PLC Digital I/O Module |
Use Scenario: Door lock actuation, window lift control, and interior lighting sequencing in passenger vehicles. IC Role / Device Role / Timing Role: High-sink I/O directly drives solenoids and incandescent lamps; SCI handles diagnostic communication with body ECU. Use Value: 12 high-sink outputs (20 mA) eliminate discrete driver transistors - reduces PCB area and thermal stress in confined junction boxes. |
Use Scenario: DIN-rail mounted I/O expansion unit interfacing with industrial sensors and actuators via opto-isolated inputs/outputs. IC Role / Device Role / Timing Role: SPI slave for configuration and status reporting; 10-bit ADC monitors supply rail integrity and ambient temperature. Use Value: Read-out protected Flash prevents unauthorized firmware modification - meets IEC 62443-3-3 requirements for secure industrial firmware. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324K4TC/TR | 16 KB Flash, 512 bytes RAM, same peripherals and pinout - differs only in memory size and part marking. | Required where firmware exceeds 8 KB or future feature expansion is anticipated without PCB redesign. | Select when code growth headroom is needed; drop-in replacement with identical timing and I/O behavior. |
| ST72F324J6TC/TR | 32 KB Flash, 1024 bytes RAM, identical architecture and peripheral set - higher memory density variant in same TQFP44 package. | Used in complex control applications with integrated bootloader, multiple communication stacks, or large lookup tables. | Choose for new designs needing long-term firmware scalability; shares all register maps and interrupt vectors. |
Compared with ST72F324J4TC/TR, the J6 and K4 variants retain identical peripheral timing, power modes, and pin compatibility while offering scalable Flash/RAM - enabling seamless migration paths without hardware or driver changes.
Availability
ST72F324J4TC/TR is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, automotive body electronics, and PLC digital I/O modules requiring stable component supply across extended product lifecycles.
Supply support for ST72F324J4TC/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, real-time embedded control applications demanding high reliability, low power consumption, and robust peripheral integration - particularly in motor drives, appliance control, and industrial automation.
FAQ
Is ST72F324J4TC/TR still recommended for new designs?
No - STMicroelectronics explicitly marks this device as "NOT FOR NEW DESIGN" in its official documentation. It remains available for legacy support and existing production, but new projects should use the ST72324B(J/K) series or modern alternatives like STM8S. Aetrix maintains inventory and lifecycle coordination for ongoing manufacturing needs.
What programming interfaces does ST72F324J4TC/TR support?
It supports In-Circuit Programming (ICP) via the ICC interface using the dedicated ICCSEL/VPP pin, and In-Application Programming (IAP) through SCI or SPI using embedded bootloader routines. No external debugger is required for field updates, though ST's STVP software and compatible programmers (e.g., ST-LINK via adapter) are used for initial flashing.
Does ST72F324J4TC/TR include hardware CRC or encryption engines?
No - this MCU lacks dedicated cryptographic accelerators or hardware CRC generators. Security relies on Flash read-out protection bits and software-implemented checksums or AES routines. For applications requiring certified data integrity or secure boot, migration to STM8L or STM32G0 series is advised.
Can ST72F324J4TC/TR operate reliably at 125°C junction temperature?
Yes - it is fully specified from –40°C to +125°C ambient, with validated electrical performance including Flash programming, ADC linearity, and timer accuracy across that range. Thermal derating of supply current and I/O drive strength applies above 85°C, per Section 12.2.3 of the datasheet.
ST72F324J4TC/TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 44-LQFP
- Series:
- ST7
- Packaging:
- Tape & Reel (TR)
- 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:
- 32
- 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 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F324J4TC/TR FAQ
1.How can I place an order for ST72F324J4TC/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324J4TC/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 ST72F324J4TC/TR reliable?
The price and inventory of ST72F324J4TC/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324J4TC/TR is usually 5 days.
3.What payment methods are accepted for ST72F324J4TC/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324J4TC/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324J4TC/TR?
ST72F324J4TC/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324J4TC/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 ST72F324J4TC/TR?
For technical support, including ST72F324J4TC/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324J4TC/TR requirements.
6.How does Aetrix verify that ST72F324J4TC/TR is sourced from the original manufacturer or authorized distributors?
All ST72F324J4TC/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 ST72F324J4TC/TR meets industry standards.
7.What is the process for return or replacement of ST72F324J4TC/TR?
All ST72F324J4TC/TR units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324J4TC/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 ST72F324J4TC/TR part is unused and in its original packaging.
Return procedure for ST72F324J4TC/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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