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STMicroelectronics ST72F324J4T6/TR
- Part No.:
- ST72F324J4T6/TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
ST72F324J4T6/TR.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,235
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Product details
Overview
ST72F324J4T6/TR from STMicroelectronics is an 8-bit Flash microcontroller with 8 KB program memory, 384 bytes RAM, 10-bit ADC (12-channel), dual 16-bit timers (Timer A/B), SPI/SCI serial interfaces, and PLL-based clock multiplication - deployed in industrial motor control and sensor interface modules requiring deterministic real-time response under 5.5 V supply.
For engineers reviewing the ST72F324J4T6/TR datasheet, ST72F324J4T6/TR pinout, ST72F324J4T6/TR application, or ST72F324J4T6/TR equivalent, this MCU delivers verified low-voltage detection (LVD), four power-saving modes (Halt/Wait/Slow/Active-Halt), and in-application programming (IAP) support for field firmware updates in embedded control systems.
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/RESET, with up to 9 external interrupt lines mapped across 4 vectors.
The on-chip peripherals include a Main Clock Controller (MCC) with real-time base, beep generator, and clock-out capability; configurable watchdog timer; and dual 16-bit timers supporting input capture, output compare, PWM, and pulse generation - all synchronized to the PLL-multiplied system clock.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with 63 instructions and 17 addressing modes - enables compact code footprint and predictable cycle timing for deterministic control loops. |
| Flash Memory | 8 KB HD-Flash with read-out protection and 100-cycle endurance - supports secure firmware storage and field IAP without external programmer. |
| 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 robust input channels - provides ±1 LSB INL/DNL for precision analog sensing in motor current or temperature monitoring. |
| Timers | Dual 16-bit timers (Timer A/B): Timer A offers 1 input capture + 1 output compare; Timer B offers 2 input captures + 2 output compares - enables encoder counting and multi-phase PWM generation. |
| Communication | SPI (master/slave) and SCI (asynchronous UART) - supports daisy-chained sensor networks and host MCU communication over RS-232/RS-485 physical layers. |
| 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 reset triggers. |
Pinout & Package
TQFP44 (10 × 10 mm, 0.8 mm pitch) package with 44 leads; lead-free and RoHS-compliant per device marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual VDD/VSS pairs ensure stable core and I/O rail decoupling; mandatory 100 nF ceramic capacitor per VDD pin per datasheet Section 12.9. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | Bi-directional I/O ports | 32 multifunctional pins: 24 primary I/O + 17 alternate functions (e.g., TIMx_CHy, SPIx_SCK/MOSI/MISO, SCI_TX/RX) - configurable per port control registers. |
| OSCIN/OSCOUT | Crystal/resonator interface | Supports 1–8 MHz crystal or ceramic resonator; internal RC oscillator (1 MHz typ.) available as fallback clock source when external fails. |
| RESET | Asynchronous active-low reset | Hardware reset input with Schmitt-triggered input; asserts full system reset regardless of clock state - critical for fail-safe recovery. |
| ICCSEL/VPP | In-circuit programming enable | Enables ICC programming mode when pulled high during power-up; doubles as VPP for Flash programming voltage in high-voltage mode. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced Low Voltage Detector (LVD) | Programmable reset thresholds (4.1 V / 3.8 V / 3.5 V) with interrupt capability - enables graceful shutdown or warning before brown-out. |
| Four Power-Saving Modes | Halt (CPU stopped, peripherals active), Active-Halt (peripherals clocked), Wait (CPU + peripherals clocked but halted), Slow (reduced clock frequency) - reduces active current to 1.5 mA typical. |
| In-Application Programming (IAP) | Full Flash reprogramming via user code using dedicated IAP command set - allows firmware updates over SCI without external tooling. |
| Real-Time Base & Beeper | MCC module provides programmable real-time counter (RTC) and tone generator driven by independent prescaler - eliminates need for external timer or buzzer driver. |
| High-Sink I/O Capability | 10 pins support 20 mA sink (min) at VDD = 5 V - directly drives LEDs, relays, or optocouplers without external buffers in IO-optimized designs. |
Applications
| Industrial Motor Control | Sensor Interface Module |
|---|---|
Use Scenario: Closed-loop speed regulation of 3-phase BLDC motors using hall-effect feedback and PWM-driven gate drivers. IC Role / Device Role / Timing Role: Primary controller executing commutation logic, ADC sampling of phase currents, and real-time PWM update at 20 kHz. Use Value: Dual 16-bit timers with input capture and PWM output enable precise rotor position tracking and synchronous switching - reducing torque ripple below 5% THD. |
Use Scenario: Multi-sensor data aggregator (temperature, humidity, pressure) transmitting calibrated readings via RS-485 to PLC. IC Role / Device Role / Timing Role: Sensor hub managing sequential ADC conversions, digital filtering, and SCI framing with hardware parity and stop-bit generation. Use Value: 10-bit ADC with 12 robust inputs and programmable sampling time ensures ±0.5°C temp accuracy and <10 µs conversion latency per channel. |
| Smart Power Metering | Home Appliance Control Panel |
Use Scenario: Residential electricity meter measuring RMS voltage/current, computing kWh, and logging tamper events. IC Role / Device Role / Timing Role: System-on-chip handling metrology ADC sampling, EEPROM-backed energy accumulation, and IR/UART communication. Use Value: Read-out protected Flash and hardware LVD prevent unauthorized firmware modification and ensure accurate billing during grid voltage sags. |
Use Scenario: Microwave oven control board managing keypad scan, display backlight, relay sequencing, and safety interlock monitoring. IC Role / Device Role / Timing Role: Real-time coordinator polling tactile inputs, driving 7-segment LED via multiplexing, and enforcing thermal cutoff via AVD interrupt. Use Value: Auxiliary Voltage Detector (AVD) with interrupt capability triggers immediate shutdown if DC supply drops below 4.1 V - preventing unsafe magnetron operation. |
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 variant with enhanced ESD rating (4 kV HBM), updated Flash endurance (1,000 cycles), and extended temperature range (−40°C to +125°C). | Required for new designs targeting automotive-adjacent industrial environments with higher reliability demands. | Select when long-term Flash rewrite cycles (>500) or extended ambient operation beyond +85°C is required. |
| STM8S003F3P6 | 32 MHz STM8 core, 8 KB Flash, 1 KB RAM, integrated SWIM debug interface, no PLL but higher clock stability via HSI/HSE options. | Better suited for cost-sensitive consumer appliances where debug accessibility and lower BOM count outweigh legacy ST7 toolchain dependency. | Choose when migrating from ST7 toolchains is feasible and SWIM-based in-circuit debugging is prioritized over IAP-only field updates. |
Compared with ST72F324J4T6/TR, ST72F324B4T6 improves Flash longevity and thermal margin for mission-critical upgrades, while STM8S003F3P6 trades ST7-specific peripherals for modern debug infrastructure and higher throughput - making it optimal for greenfield designs.
Availability
ST72F324J4T6/TR is available at Aetrix Electronics and suitable for industrial motor control, sensor interface modules, smart power metering, and home appliance control panels requiring stable component supply and long-lifecycle support.
Supply support for ST72F324J4T6/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 ICs, sensors, and analog devices 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, robust I/O, and field-programmable Flash for industrial automation and appliance applications.
FAQ
Is ST72F324J4T6/TR still recommended for new designs?
No - STMicroelectronics explicitly marks this part as "NOT FOR NEW DESIGN" in the April 2008 datasheet. It remains available for legacy production and repair, but new projects should use the ST72F324B series or migrate to the STM8 platform for extended support, improved Flash endurance, and enhanced ESD robustness.
What programming interfaces does ST72F324J4T6/TR support?
It supports In-Circuit Programming (ICP) via the ICC interface using the ICCSEL/VPP pin and standard ST-LINK-compatible programmers, plus In-Application Programming (IAP) through user firmware using the SCI or SPI peripheral - enabling field updates without physical rework or external tools.
Does ST72F324J4T6/TR include hardware CRC or encryption acceleration?
No - the ST72F324J4T6/TR lacks dedicated cryptographic hardware. It provides no hardware CRC generator, AES engine, or secure key storage. Security relies on software-implemented algorithms and Flash read-out protection, which prevents external dumping but does not guarantee runtime integrity.
Can the 10-bit ADC operate during Halt mode?
Yes - the ADC can be configured to trigger conversions autonomously during Halt mode using the watchdog timer or external interrupt wake-up sources. The ADC result register remains readable post-wakeup, enabling ultra-low-power sensor polling at sub-mA average current.
ST72F324J4T6/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 ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F324J4T6/TR FAQ
1.How can I place an order for ST72F324J4T6/TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324J4T6/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 ST72F324J4T6/TR reliable?
The price and inventory of ST72F324J4T6/TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324J4T6/TR is usually 5 days.
3.What payment methods are accepted for ST72F324J4T6/TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324J4T6/TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324J4T6/TR?
ST72F324J4T6/TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324J4T6/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 ST72F324J4T6/TR?
For technical support, including ST72F324J4T6/TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324J4T6/TR requirements.
6.How does Aetrix verify that ST72F324J4T6/TR is sourced from the original manufacturer or authorized distributors?
All ST72F324J4T6/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 ST72F324J4T6/TR meets industry standards.
7.What is the process for return or replacement of ST72F324J4T6/TR?
All ST72F324J4T6/TR units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324J4T6/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 ST72F324J4T6/TR part is unused and in its original packaging.
Return procedure for ST72F324J4T6/TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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