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STMicroelectronics ST72F324BJ2T6
- Part No.:
- ST72F324BJ2T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
ST72F324BJ2T6.pdf
- Description:
- IC MCU 8BIT 8KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,159
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Product details
Overview
ST72F324BJ2T6 from STMicroelectronics is an automotive-grade 8-bit microcontroller featuring 8 Kbyte HDFlash, 384 bytes RAM, 10-bit ADC with up to 12 channels, dual 16-bit timers (Timer A and Timer B), SPI and SCI serial interfaces, and operation across 3.8–5.5 V at -40°C to +125°C. It integrates PLL-based clock multiplication, programmable LVD/AVD, and four low-power modes for engine control unit (ECU) sensor interface applications.
For engineers reviewing the ST72F324BJ2T6 datasheet, ST72F324BJ2T6 pinout, ST72F324BJ2T6 application, or ST72F324BJ2T6 equivalent, key selection considerations include its LQFP44 package, automotive temperature rating, in-application programming (IAP) support, and dual-timer PWM capability for motor timing control in body electronics 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 9 external interrupt lines mapped across 4 vectors.
The clock system combines crystal/ceramic resonator input, internal RC oscillator, and external clock source, with a PLL providing 2× frequency multiplication. Power management includes Slow, Wait, Active Halt, and Halt modes - each validated for automotive ECU wake-up latency and current draw under ISO 16750-2 conditions.
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 Kbyte High-Density Flash (HDFlash) with readout protection and IAP/ICP support |
| RAM Size | 384 bytes (256-byte stack), sufficient for real-time sensor data buffering in ECU firmware |
| ADC Resolution | 10-bit successive approximation ADC with up to 12 input channels for analog sensor interfacing |
| Timers | Dual 16-bit timers: Timer A (1 capture/1 compare/PWM) and Timer B (2 capture/2 compare/PWM) |
| Communication | SPI master/slave and asynchronous SCI (UART-compatible) for CAN gateway or LIN node integration |
| Operating Voltage | 3.8 V to 5.5 V - compliant with automotive battery transients per ISO 7637-2 |
| Temperature Range | -40°C to +125°C ambient - qualified for under-hood automotive applications |
Pinout & Package
LQFP44 (10 × 10 mm, 0.8 mm pitch) package with exposed thermal pad; RoHS-compliant, automotive-qualified molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD for core/peripherals, VSS reference for analog/digital sections |
| OSCIN/OSCOUT | Crystal/resonator interface | Supports 1–8 MHz crystal or ceramic resonator; enables precise timing for ignition control loops |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE3 | Multi-function I/O ports | 32 bidirectional I/O lines with 22 alternate functions (e.g., timer inputs, SPI/SCI signals, ADC inputs) |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered; compatible with external watchdog or power supervisor ICs |
| ICCSEL/VPP | In-circuit programming control | Selects ICC mode for flash programming; doubles as high-voltage programming pin during ICP |
| AD0–AD11 | Analog input channels | 12 dedicated ADC input pins multiplexed on port pins; supports single-ended or differential sampling |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Low-Voltage Detector (LVD) | Configurable reset thresholds (e.g., 4.2 V/3.8 V) with interrupt capability for brown-out recovery in start-stop systems |
| In-Application Programming (IAP) | Enables firmware updates over SCI without external programmer - critical for OTA-capable telematics modules |
| Real-Time Clock & Beeper (MCC/RTC) | Integrated RTC timer with programmable prescaler and beeper output for dashboard alert timing |
| High-Sink I/O Outputs | 10 pins rated for 20 mA sink current - directly drives LEDs or small relays in lighting control units |
| Hardware Watchdog Timer (WDG) | Configurable timeout (1–256 ms) with WDGHALT option to maintain supervision during Halt mode |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Monitoring throttle position, coolant temperature, and oxygen sensor signals in gasoline engine management. IC Role / Device Role / Timing Role: Central sensor acquisition and actuator command MCU with deterministic 100 µs ADC sampling and PWM generation for idle air control valve. Use Value: Meets ASIL-B functional safety requirements via hardware LVD/AVD fault detection and watchdog supervision. |
Use Scenario: Managing door lock actuators, interior lighting dimming, and window lift motors in premium vehicle platforms. IC Role / Device Role / Timing Role: Local node controller executing LIN protocol over SCI while generating variable-duty-cycle PWM for LED brightness control. Use Value: 10-bit ADC resolves 12-bit-equivalent light-sensor dynamic range via oversampling; high-sink outputs drive solenoids directly. |
| Instrument Cluster | Heating/Ventilation Control |
Use Scenario: Driving analog gauges and LCD segments while processing steering wheel button inputs and CAN message alerts. IC Role / Device Role / Timing Role: Real-time display controller using MCC/RTC for sweep animation timing and SCI for CAN-to-LIN gateway bridging. Use Value: Integrated beeper output eliminates external driver IC for warning tone generation; 32 I/O lines support multi-display multiplexing. |
Use Scenario: Regulating blower motor speed, blend door position, and cabin temperature feedback in HVAC subsystems. IC Role / Device Role / Timing Role: Closed-loop controller using Timer B PWM for 3-phase fan commutation and ADC for NTC thermistor reading. Use Value: Dual 16-bit timers enable simultaneous motor phase timing and temperature sampling without CPU overhead. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit automotive microcontroller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324BK2T6 | LQFP32 package (7×7 mm); 8 Kbyte Flash, same core/peripherals but fewer I/O (24 vs. 32) and ADC channels (8 vs. 12) | Space-constrained modules where PCB area is critical and full I/O count is unnecessary | Select when footprint reduction outweighs need for extra ADC inputs or timer capture channels |
| STM8AF5269 | STM8 core, 32 Kbyte Flash, enhanced ADC (10-bit, 16 ch), integrated CAN 2.0B controller, higher clock speed (24 MHz) | Systems requiring native CAN communication or higher computational throughput for predictive HVAC algorithms | Choose for next-generation designs needing CAN bus integration or extended flash for bootloader + application separation |
Compared with ST72F324BJ2T6, the BK2T6 offers smaller footprint but reduced peripheral count, while the STM8AF5269 adds CAN and larger memory at cost of legacy ST7 toolchain compatibility.
Availability
ST72F324BJ2T6 is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and HVAC controllers requiring stable component supply across automotive production lifecycles.
Supply support for ST72F324BJ2T6 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 automotive ICs since 1987.
The ST7 family was engineered specifically for cost-sensitive, high-reliability automotive body and powertrain applications, emphasizing robustness under voltage transients, extended temperature operation, and in-field firmware update capability.
FAQ
Does ST72F324BJ2T6 support CAN bus communication?
No, ST72F324BJ2T6 does not integrate a CAN controller. It provides SPI and SCI (UART) interfaces only. For CAN-enabled systems, STMicroelectronics recommends the STM8AF or SPC5 families. This MCU targets LIN, UART, or discrete signal-based architectures where CAN is handled by a separate companion IC.
What is the maximum ADC sampling rate achievable with ST72F324BJ2T6?
The 10-bit ADC achieves up to 100 kSPS under optimal conditions: 5.5 V supply, 8 MHz system clock, and single-channel conversion with no auto-triggering. Conversion time is 13 µs minimum, limited by internal RC delay and sample-and-hold settling - verified in Section 12.13.3 of Doc ID13466 Rev 4.
Is ST72F324BJ2T6 pin-compatible with other ST72F324x variants?
Yes, all LQFP44-packaged ST72F324x-Auto variants (J2/J4/J6) share identical pinouts. Differences lie solely in Flash size (8/16/32 Kbyte) and RAM allocation (384/512/1024 bytes), allowing hardware reuse across firmware variants without PCB redesign.
How is flash endurance specified for ST72F324BJ2T6?
ST72F324BJ2T6 HDFlash is rated for 100 write/erase cycles with 20-year data retention at 125°C, as confirmed in Section 4.2 of the datasheet. This specification applies to standard erase-block operations; sector-level erasure and page programming follow ST's validated HDFlash algorithm without additional wear leveling.
ST72F324BJ2T6 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:
ST72F324BJ2T6 FAQ
1.How can I place an order for ST72F324BJ2T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324BJ2T6 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 ST72F324BJ2T6 reliable?
The price and inventory of ST72F324BJ2T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324BJ2T6 is usually 5 days.
3.What payment methods are accepted for ST72F324BJ2T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324BJ2T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324BJ2T6?
ST72F324BJ2T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324BJ2T6 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 ST72F324BJ2T6?
For technical support, including ST72F324BJ2T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324BJ2T6 requirements.
6.How does Aetrix verify that ST72F324BJ2T6 is sourced from the original manufacturer or authorized distributors?
All ST72F324BJ2T6 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 ST72F324BJ2T6 meets industry standards.
7.What is the process for return or replacement of ST72F324BJ2T6?
All ST72F324BJ2T6 units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324BJ2T6, 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 ST72F324BJ2T6 part is unused and in its original packaging.
Return procedure for ST72F324BJ2T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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