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STMicroelectronics ST72F324J6T6
- Part No.:
- ST72F324J6T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
ST72F324J6T6.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,506
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Product details
Overview
ST72F324J6T6 from STMicroelectronics is an 8-bit Flash microcontroller with 32KB HD-Flash, 1KB RAM, 10-bit ADC (12 input channels), four timers (including RTC/beeper), SPI and SCI interfaces, and programmable LVD/AVD supervision - deployed in industrial motor control and sensor interface modules requiring deterministic real-time response at 5V supply.
For engineers reviewing the ST72F324J6T6 datasheet, ST72F324J6T6 pinout, ST72F324J6T6 application, or ST72F324J6T6 equivalent, this MCU delivers verified 16-MHz operation via PLL multiplication, dual-voltage Flash with read-out protection, and hardware watchdog with halt-mode support - critical for embedded systems demanding code security, low-power wake-on-interrupt, and analog-digital co-processing.
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 and up to 9 external interrupt lines mapped across I/O ports.
The clock system integrates crystal/ceramic resonator oscillators, internal RC oscillator, clock security system, and a 2× PLL multiplier. Power management includes four modes - Halt, Active-Halt, Wait, and Slow - each with distinct peripheral retention and wake-up latency profiles confirmed in electrical characterization tables.
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 | 32KB High-Density Flash with read-out protection and 100-cycle endurance - supports secure field updates and 20-year data retention at 55°C. |
| RAM Size | 1024 bytes (256-byte stack) - sufficient for real-time task stacks, ADC buffer arrays, and SCI transmit/receive FIFOs. |
| ADC Resolution | 10-bit SAR ADC with up to 12 robust input channels - provides 1 LSB INL/DNL accuracy for precision sensor signal acquisition. |
| Timers | Four dedicated timers: Main Clock Controller (RTC/beeper), configurable WDG, 16-bit Timer A (PWM/capture), and 16-bit Timer B (dual capture/compare) - enables multi-rate timing without software overhead. |
| Communication | SPI (master/slave) and SCI (asynchronous UART) - supports daisy-chained sensor networks and RS-232/RS-485 host interfacing. |
| Supply Range | 3.8 V to 5.5 V - compatible with standard 5V industrial rails and tolerant of brown-out conditions down to 3.8V. |
| Operating Temp | −40°C to +125°C - qualified for under-hood automotive subsystems and factory-floor PLC I/O modules. |
Pinout & Package
TQFP44 package (10 mm × 10 mm, 0.8 mm pitch) with exposed thermal pad - optimized for high-density PCB layouts and thermal dissipation in enclosed enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power pins per side ensure low-impedance supply routing and reduce ground bounce during I/O switching. |
| OSCIN/OSCOUT | Crystal/resonator interface | Supports 1–8 MHz crystals or ceramic resonators; internal load capacitors eliminate external components for cost-sensitive designs. |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered input with internal pull-up - ensures reliable power-on and fault recovery without external RC network. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | Multi-function I/O ports | 32 bidirectional lines with 12 high-sink outputs (20 mA) - drive LEDs, relays, and optocouplers directly without external buffers. |
| ADC_IN0–ADC_IN11 | Analog input channels | 12 dedicated or multiplexed ADC inputs mapped across port pins - enable simultaneous sampling of temperature, current, and voltage sensors. |
| SCI_TX/SCI_RX | Asynchronous serial interface | Full-duplex UART signals with programmable baud rate generator - supports ISO 9141 diagnostics and Modbus RTU protocols. |
| SPI_MOSI/MISO/SCK/SS | Synchronous serial interface | Hardware SPI master/slave with frame synchronization - eliminates bit-banging overhead for EEPROM or display driver communication. |
Key Features
| Feature | Design Value |
|---|---|
| In-Application Programming (IAP) | Enables firmware updates over SCI or SPI without external programmer - critical for remote field upgrades in deployed equipment. |
| Enhanced Low-Voltage Detector (LVD) | Programmable reset thresholds (4.0 V / 4.3 V / 4.6 V) with interrupt capability - allows graceful shutdown before brown-out corruption. |
| Real-Time Clock & Beeper | Integrated RTC with calendar mode and programmable beep tone generation - eliminates external RTC IC and piezo driver circuitry. |
| Hardware Watchdog with HALT option | WDGHALT mode resets only on timeout while preserving RAM and registers during Halt - maintains state across ultra-low-power sleep cycles. |
| 16-bit Timer A with PWM | Single-shot or continuous PWM output with dead-time insertion support - drives brushed DC motors or LED dimming with <1% duty-cycle resolution. |
| Interrupt Nesting | Hardware-prioritized vector table with automatic context save/restore - guarantees sub-2 µs latency for time-critical events like encoder zero-crossing detection. |
Applications
| Industrial Motor Control | Smart Sensor Node |
|---|---|
Use Scenario: Closed-loop speed regulation of 24V DC brush motors in HVAC actuators using quadrature encoder feedback and PWM drive. IC Role / Device Role / Timing Role: Real-time controller executing PID loop at 1 kHz, managing ADC sampling, timer-based PWM, and SCI telemetry reporting. Use Value: Integrated 16-bit Timer A and 10-bit ADC eliminate external signal conditioning and timing ICs, reducing BOM count by 3 components. |
Use Scenario: Battery-powered environmental monitor measuring temperature, humidity, and CO₂ via analog and digital sensors in building automation. IC Role / Device Role / Timing Role: Low-power coordinator entering Wait mode between 10-second sensor reads, waking on ADC EOC or SCI command. Use Value: Four power-saving modes and AVD interrupt enable >1-year battery life on two AA cells with no external PMIC. |
| PLC Digital I/O Module | Automotive Body Control Unit |
Use Scenario: DIN-rail mounted I/O expansion module with 16-channel isolated digital input and 8-channel relay output for factory floor logic controllers. IC Role / Device Role / Timing Role: Deterministic I/O scanner polling inputs at 10 ms intervals, updating outputs via port latch writes and handling emergency stop interrupts. Use Value: 32 I/O lines with 12 high-sink outputs drive 24V industrial relays directly, removing 12 discrete transistor drivers. |
Use Scenario: Door module controlling window lift, mirror fold, and interior lighting in passenger vehicles with LIN bus coordination. IC Role / Device Role / Timing Role: LIN slave node processing switch inputs, driving DC motors via PWM, and communicating status over SCI-LIN transceiver. Use Value: −40°C to +125°C rating and LVD/AVD supervision meet AEC-Q100 Grade 2 requirements without derating. |
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 | Successor with enhanced ESD immunity (4 kV HBM), updated Flash programming algorithm, and extended debug interface. | Required for new designs per ST's "Not for New Design" notice on ST72F324Jx; identical pinout and register map. | Select when initiating new projects - offers full backward compatibility and improved manufacturing yield. |
| STM8S105K4T6 | 32 MHz STM8 core, 16 KB Flash, 2 KB RAM, integrated SWIM debug, but no beeper or RTC in main clock controller. | Lacks dedicated beeper and RTC hardware; requires software emulation for tone generation and calendar functions. | Choose for higher performance and modern toolchain support where beeper/RTC are not mandatory. |
Compared with ST72F324J6T6, ST72F324B6T6 provides drop-in replacement assurance and long-term supply continuity, while STM8S105K4T6 trades legacy peripherals for higher clock speed and debug flexibility - making the former ideal for maintenance, the latter for performance-led redesigns.
Availability
ST72F324J6T6 is available at Aetrix Electronics and suitable for industrial motor control, smart sensor nodes, PLC I/O modules, and automotive body electronics requiring stable component supply across extended product lifecycles.
Supply support for ST72F324J6T6 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, specializing in microcontrollers, power management, and automotive-grade ICs with vertical manufacturing capability.
The ST7 family was designed for cost-sensitive, real-time embedded applications in industrial automation and appliance control - emphasizing Flash security, analog integration, and low-voltage robustness without sacrificing code density.
FAQ
Is ST72F324J6T6 still recommended for new designs?
No - STMicroelectronics explicitly marks ST72F324Jx as "Not for New Design" in the April 2008 datasheet. The ST72F324Bx series is the designated successor with identical pinout, register compatibility, and enhanced ESD/programming reliability. Aetrix Electronics stocks both for legacy support and migration paths.
What debug interfaces does ST72F324J6T6 support?
It supports In-Circuit Programming (ICP) via the ICC interface using the STVP (ST Visual Programmer) tool and standard 5-pin connector. No on-chip debug wire (SWIM) or JTAG is present - debugging relies on ROM monitor or printf-style SCI logging with breakpoints set in Flash.
Can the 10-bit ADC operate during low-power modes?
Yes - the ADC remains functional in Wait and Active-Halt modes, enabling wake-up on analog threshold crossing. It is disabled in Halt and Slow modes. Conversion time is 13 µs per sample at 16 MHz CPU clock, with programmable sampling time control.
Does ST72F324J6T6 include hardware CRC or encryption engines?
No - it lacks dedicated cryptographic accelerators or hardware CRC generators. Security relies on Flash read-out protection bits and software-implemented checksums. For secure boot or data integrity, external co-processors or software libraries must be used.
ST72F324J6T6 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:
- 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 12x10b
- Oscillator Type:
- Internal
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F324J6T6 FAQ
1.How can I place an order for ST72F324J6T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324J6T6 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 ST72F324J6T6 reliable?
The price and inventory of ST72F324J6T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324J6T6 is usually 5 days.
3.What payment methods are accepted for ST72F324J6T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324J6T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324J6T6?
ST72F324J6T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324J6T6 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 ST72F324J6T6?
For technical support, including ST72F324J6T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324J6T6 requirements.
6.How does Aetrix verify that ST72F324J6T6 is sourced from the original manufacturer or authorized distributors?
All ST72F324J6T6 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 ST72F324J6T6 meets industry standards.
7.What is the process for return or replacement of ST72F324J6T6?
All ST72F324J6T6 units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324J6T6, 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 ST72F324J6T6 part is unused and in its original packaging.
Return procedure for ST72F324J6T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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