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STMicroelectronics ST72F324J2TA
- Part No.:
- ST72F324J2TA
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
ST72F324J2TA.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,248
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Product details
Overview
ST72F324J2TA 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 and Timer B), SPI/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 ST72F324J2TA datasheet, ST72F324J2TA pinout, ST72F324J2TA application, or ST72F324J2TA equivalent, this MCU delivers verified low-voltage detection (LVD), in-application programming (IAP), four power-saving modes (Halt/Active-Halt/Wait/Slow), and robust I/O with high-sink capability for direct LED/relay drive in cost-sensitive embedded 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 and 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; a configurable watchdog timer; and dual 16-bit timers supporting input capture, output compare, PWM, and pulse generation - all synchronized to the same system clock domain derived from internal RC, crystal, or external clock sources.
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 (256-byte stack), volatile storage for variables and context during execution |
| ADC Resolution | 10-bit successive approximation ADC with up to 12 analog inputs, low-current coupling for noise immunity |
| Timers | Two 16-bit timers: Timer A (1 IC/1 OC/PWM), Timer B (2 IC/2 OC/PWM), both support pulse generation |
| Communication | SPI synchronous master/slave interface + SCI asynchronous UART with programmable baud rate generator |
| Supply Range | 3.8 V to 5.5 V operation, with enhanced LVD and auxiliary voltage detector (AVD) with interrupt capability |
Pinout & Package
TQFP32 (7 × 7 mm, 0.8 mm pitch) package with 32-pin layout optimized for compact industrial control PCBs; includes dedicated reset, clock, programming (ICCSEL/VPP), and dual serial interface pins.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Primary 5 V supply rails; decoupling required within 10 mm of pins |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered, supports external pull-up and debounced reset button |
| OSCIN/OSCOUT | Crystal/resonator interface | Supports 1–16 MHz crystals or ceramic resonators; internal oscillator selectable via configuration bits |
| ICCSEL/VPP | In-circuit programming control | Enables ICP mode when pulled high during reset; also serves as programming voltage input |
| PA0–PA7 | Port A bidirectional I/O | 8-bit port with alternate functions including SCI TX/RX, SPI SCK/MOSI/MISO, Timer A/B signals |
| PB0–PB7 | Port B bidirectional I/O | 8-bit port supporting external interrupts, ADC channel selection, and high-sink outputs (20 mA) |
| PC0–PC7 | Port C bidirectional I/O | 8-bit port with Timer A/B capture/compare, PWM outputs, and clock-out capability |
| PD0–PD7 | Port D bidirectional I/O | 8-bit port with additional SCI/ADC functions; PD0–PD3 support external interrupt sensitivity |
Key Features
| Feature | Design Value |
|---|---|
| In-Application Programming (IAP) | Enables firmware updates over SCI or SPI without external programmer, critical for field-deployed devices |
| Dual 16-bit Timers with PWM | Timer A and Timer B independently generate precise PWM waveforms for motor speed control or LED dimming |
| Enhanced Low-Voltage Detector (LVD) | Programmable reset thresholds (e.g., 4.0 V/4.3 V/4.6 V) with interrupt capability for graceful shutdown before brownout |
| Four Power-Saving Modes | Halt (CPU stopped, peripherals active), Active-Halt (peripherals clocked), Wait (all clocks gated), Slow (RC oscillator only) |
| 12-Channel 10-bit ADC | Configurable sampling time and trigger sources (timer, software, external event); supports differential input mode on select channels |
Applications
| Industrial Motor Control | Smart Sensor Interface |
|---|---|
Use Scenario: Brushless DC motor commutation in HVAC blowers and pump controllers. IC Role / Device Role / Timing Role: Real-time PWM generation, ADC-based current sensing, and SCI-based status reporting to host MCU. Use Value: Precise 16-bit timer synchronization ensures <1 µs phase alignment between PWM edges and current sampling windows. |
Use Scenario: Multi-sensor node aggregating temperature, pressure, and humidity readings for building automation. IC Role / Device Role / Timing Role: Central sensor hub with 10-bit ADC scanning 12 channels, SPI-connected transducers, and SCI telemetry to gateway. Use Value: Integrated LVD and AVD enable reliable operation across wide supply fluctuations common in battery-backed sensor nodes. |
| Embedded Power Supply Monitor | Legacy Industrial PLC I/O Module |
Use Scenario: Monitoring rail voltages and fan tachometer signals in telecom power shelves. IC Role / Device Role / Timing Role: Voltage supervision via LVD/AVD, timer-based pulse counting for RPM, and SPI communication to management ASIC. Use Value: Dual interrupt-capable voltage detectors allow independent fault handling for main and auxiliary supplies without software polling. |
Use Scenario: Discrete I/O expansion module for legacy PLC backplanes using 24 V digital inputs and relay outputs. IC Role / Device Role / Timing Role: GPIO manager with 12 high-sink outputs (20 mA), external interrupt-driven input capture, and SCI diagnostics link. Use Value: 12 high-sink outputs eliminate need for external driver transistors, reducing BOM count and board area in space-constrained modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324B2TA | Successor part with improved 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-grade reliability or extended thermal environments | Select if long-term availability, higher ESD immunity, or wider temp range is mandatory; not drop-in due to minor register mapping changes |
| STM8S003F3P6 | 32 MHz STM8 core, 8 KB Flash, 1 KB RAM, integrated EEPROM, no PLL but faster max clock (16 MHz internal RC) | Better suited for applications needing higher throughput or non-volatile parameter storage without external EEPROM | Prefer when migrating from ST7 toolchain is acceptable and higher code density or EEPROM integration adds value |
Compared with ST72F324J2TA, ST72F324B2TA offers enhanced lifecycle support and ruggedness for new deployments, while STM8S003F3P6 provides superior computational throughput and embedded EEPROM - making the latter preferable where firmware complexity or data logging outweighs legacy ST7 ecosystem dependency.
Availability
ST72F324J2TA is available at Aetrix Electronics and suitable for industrial motor control, smart sensor interface, and embedded power supply monitoring requiring stable component supply through extended product lifecycles.
Supply support for ST72F324J2TA 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-effective, deterministic real-time control in resource-constrained industrial equipment - emphasizing low-power operation, robust I/O, and field-programmability without external debug hardware.
FAQ
Is ST72F324J2TA still recommended for new designs?
No - STMicroelectronics explicitly marks ST72F324J2TA as "NOT FOR NEW DESIGN" in its official documentation. The ST72F324B series (e.g., ST72F324B2TA) is the designated replacement, offering improved ESD performance, flash endurance, and extended temperature range. Legacy design refreshes should verify register compatibility and update development tools accordingly.
What programming interfaces does ST72F324J2TA support?
ST72F324J2TA supports In-Circuit Programming (ICP) via the ICCSEL/VPP pin and standard SWIM (Single Wire Interface Module) protocol using ST's ST-LINK-compatible debuggers. It also enables In-Application Programming (IAP) over SCI or SPI, allowing firmware updates without halting system operation or requiring physical reprogramming access.
Does ST72F324J2TA include hardware UART support?
Yes - it integrates a full-duplex Serial Communications Interface (SCI) compatible with standard UART protocols, supporting programmable baud rates, framing (start/stop bits), parity, and 8-bit data. The SCI peripheral uses dedicated PA2 (TX) and PA3 (RX) pins and generates interrupts on transmit complete, receive ready, and error conditions.
Can ST72F324J2TA operate from a 3.3 V supply?
No - ST72F324J2TA is specified only for 3.8 V to 5.5 V operation per its absolute maximum ratings and electrical characteristics. Attempting 3.3 V operation risks unreliable reset behavior, insufficient I/O drive strength, and undefined ADC performance. For 3.3 V systems, consider the STM8L or STM32L series with true low-voltage operation.
ST72F324J2TA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 44-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:
- 32
- Program Memory Size:
- 8KB (8K x 8)
- Program Memory Type:
- FLASH
- EEPROM Size:
- -
- RAM Size:
- 384 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:
ST72F324J2TA FAQ
1.How can I place an order for ST72F324J2TA through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324J2TA 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 ST72F324J2TA reliable?
The price and inventory of ST72F324J2TA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324J2TA is usually 5 days.
3.What payment methods are accepted for ST72F324J2TA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324J2TA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324J2TA?
ST72F324J2TA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324J2TA 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 ST72F324J2TA?
For technical support, including ST72F324J2TA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324J2TA requirements.
6.How does Aetrix verify that ST72F324J2TA is sourced from the original manufacturer or authorized distributors?
All ST72F324J2TA 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 ST72F324J2TA meets industry standards.
7.What is the process for return or replacement of ST72F324J2TA?
All ST72F324J2TA units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324J2TA, 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 ST72F324J2TA part is unused and in its original packaging.
Return procedure for ST72F324J2TA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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