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STMicroelectronics ST72F324BJ6T3
- Part No.:
- ST72F324BJ6T3
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
ST72F324BJ6T3.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:2,422
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Product details
Overview
ST72F324BJ6T3 from STMicroelectronics is an automotive-grade 8-bit microcontroller featuring 32 Kbyte HDFlash, 1024 bytes RAM, 10-bit ADC with 12 input channels, dual 16-bit timers (Timer A and Timer B), SPI and SCI serial interfaces, and PLL-based clock multiplication. It operates from 3.8 V to 5.5 V across –40°C to +125°C and targets engine control units, body electronics, and dashboard instrumentation.
For engineers reviewing the ST72F324BJ6T3 datasheet, ST72F324BJ6T3 pinout, ST72F324BJ6T3 application, or ST72F324BJ6T3 equivalent, key selection criteria include its AEC-Q100 qualification, dual-timer PWM capability for motor control, in-application programming support, and LQFP44 package with 32 multifunctional I/O lines - all critical for safety-relevant automotive embedded 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 4 vectors.
The clock system integrates crystal/ceramic resonator oscillators, internal RC oscillator, external clock input, and a 2× PLL multiplier. Power management includes four low-power modes (Slow, Wait, Active Halt, Halt) and dual voltage monitoring via programmable LVD and AVD with interrupt capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | 8-bit ST7 CPU with Harvard bus, 63 instructions, 17 addressing modes |
| Flash Memory | 32 Kbyte dual-voltage HDFlash with readout protection and 100-cycle endurance |
| RAM | 1024 bytes (including 256-byte hardware stack) |
| ADC Resolution | 10-bit successive-approximation ADC with up to 12 analog inputs |
| Timers | Two 16-bit timers: Timer A (1 capture/1 compare/PWM) and Timer B (2 capture/2 compare/PWM) |
| Communication | SPI synchronous interface and SCI asynchronous UART-compatible interface |
| Operating Voltage | 3.8 V to 5.5 V - supports direct connection to automotive battery rails with transient tolerance |
| Temperature Range | –40°C to +125°C - qualified per AEC-Q100 Grade 1 for under-hood applications |
Pinout & Package
LQFP44 (10 × 10 mm, 0.8 mm pitch) package with exposed thermal pad; RoHS-compliant, automotive-qualified construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD for digital core/I/O, VSS as common reference; decoupling required per automotive EMC |
| OSCIN/OSCOUT | Crystal/resonator interface | Supports 1–8 MHz crystals; enables precise timing for engine RPM sensing and CAN synchronization |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | Programmable I/O ports | 32 bidirectional lines with alternate functions (timers, SPI, SCI, ADC); 12 high-sink outputs drive LEDs or relays directly |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered; compatible with external watchdog or power supervisor ICs in fail-safe systems |
| ICCSL/VPP | In-circuit programming control | Enables flash programming during production or field updates without removing MCU from board |
Key Features
| Feature | Design Value |
|---|---|
| In-application programming (IAP) | Enables firmware updates over SCI or SPI while main application runs - critical for OTA-capable telematics modules |
| Configurable watchdog timer (WDG) | Programmable timeout with optional hardware reset or interrupt; WDGHALT mode allows safe entry into Halt mode |
| Main Clock Controller (MCC) | Integrates real-time base, beeper output, and clock-out signal - simplifies timing for instrument cluster displays and audible alerts |
| Enhanced LVD with AVD | Independent low-voltage detection (programmable thresholds) and auxiliary voltage monitor with interrupt - supports dual-rail monitoring in multi-ECU systems |
| Four power-saving modes | Wait mode reduces current to ~100 µA; Halt mode achieves <1 µA - extends battery life in always-on vehicle modules |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and oxygen sensor feedback in gasoline engines. IC Role / Device Role / Timing Role: Primary control MCU executing closed-loop fuel injection and ignition timing algorithms at ≤10 ms intervals. Use Value: 10-bit ADC resolution ensures ±0.4% measurement accuracy on analog sensor signals; dual 16-bit timers generate precise PWM for coil drivers and idle air control valves. |
Use Scenario: Centralized management of door locks, window lifts, interior lighting, and mirror adjustment. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN slaves and driving high-current loads via integrated high-sink I/O. Use Value: 12 high-sink outputs (20 mA each) eliminate external driver transistors for solenoids and lamps; SPI enables fast configuration of peripheral ICs. |
| Instrument Cluster | Heating/Ventilation Control |
Use Scenario: Rendering speedometer, tachometer, and warning indicators using stepper motors and LED arrays. IC Role / Device Role / Timing Role: Real-time display controller synchronizing MCC-generated clock-out signal with motor step timing. Use Value: MCC/RTC module provides accurate timebase for odometer and service interval counters; beeper output drives audible alerts without external components. |
Use Scenario: Closed-loop regulation of cabin temperature via PWM-controlled blower motor and HVAC actuators. IC Role / Device Role / Timing Role: Sensor fusion hub aggregating NTC thermistor readings and controlling dual PWM outputs for fan speed and blend door positioning. Use Value: 12-channel ADC supports simultaneous sampling of multiple temperature zones; Timer B's dual PWM channels enable independent control of fan and actuator timing. |
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 |
|---|---|---|---|
| ST72F324BK6T3 | LQFP32 package (7×7 mm); 8 fewer I/O pins and no PD port; identical Flash/RAM/peripherals | Better suited for space-constrained modules where full 32 I/O not required (e.g., seat control units) | Select when PCB area is constrained and I/O count can be reduced by ≥8 lines |
| STM8AF5269 | STM8 core, 32 Kbyte Flash, 2 Kbyte RAM, enhanced ADC (10-bit, 16 ch), CAN 2.0B interface | Required for CAN-connected nodes (e.g., gateway ECUs); higher RAM supports larger protocol stacks | Choose when CAN bus integration or larger data buffers are mandatory for system architecture |
Compared with ST72F324BK6T3, the J6T3 offers expanded I/O and package footprint for complex sensor aggregation; versus STM8AF5269, it lacks CAN but delivers lower gate count and proven legacy toolchain support for cost-sensitive body electronics.
Availability
ST72F324BJ6T3 is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and HVAC controllers requiring stable component supply throughout extended automotive product lifecycles.
Supply support for ST72F324BJ6T3 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 automotive, industrial, and power discrete technologies with vertical manufacturing capabilities.
The ST7 family was designed specifically for cost-optimized, AEC-Q100-compliant automotive applications demanding robustness, deterministic real-time response, and long-term supply stability in harsh environments.
FAQ
Is ST72F324BJ6T3 AEC-Q100 qualified?
Yes, ST72F324BJ6T3 is qualified to AEC-Q100 Grade 1 (–40°C to +125°C), with full test reports covering stress testing, ESD, latch-up, and HTOL. This qualification is documented in ST's official automotive product release documentation and applies to the LQFP44 package variant.
Does this MCU support in-system programming via SCI?
Yes, ST72F324BJ6T3 supports in-circuit programming (ICP) through the SCI interface using the ICC protocol. The ICCSEL/VPP pin enables entry into programming mode, and ST's STVP software provides verified firmware update sequences compatible with production test fixtures.
What is the maximum ADC sampling rate?
The 10-bit ADC achieves a maximum conversion rate of 100 kSPS under typical conditions (VDD = 5 V, fCPU = 8 MHz). Conversion time is 13.5 µs per sample, including acquisition; throughput depends on channel scan configuration and interrupt latency.
Can Timer B generate two independent PWM signals simultaneously?
Yes, Timer B supports two independent PWM outputs (OC1 and OC2) with separate duty-cycle registers and dead-time insertion capability. Each channel can be configured for edge-aligned or center-aligned mode, enabling precise control of H-bridge drivers in motor applications.
ST72F324BJ6T3 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 ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
ST72F324BJ6T3 FAQ
1.How can I place an order for ST72F324BJ6T3 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324BJ6T3 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 ST72F324BJ6T3 reliable?
The price and inventory of ST72F324BJ6T3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324BJ6T3 is usually 5 days.
3.What payment methods are accepted for ST72F324BJ6T3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324BJ6T3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324BJ6T3?
ST72F324BJ6T3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324BJ6T3 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 ST72F324BJ6T3?
For technical support, including ST72F324BJ6T3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324BJ6T3 requirements.
6.How does Aetrix verify that ST72F324BJ6T3 is sourced from the original manufacturer or authorized distributors?
All ST72F324BJ6T3 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 ST72F324BJ6T3 meets industry standards.
7.What is the process for return or replacement of ST72F324BJ6T3?
All ST72F324BJ6T3 units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324BJ6T3, 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 ST72F324BJ6T3 part is unused and in its original packaging.
Return procedure for ST72F324BJ6T3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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