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STMicroelectronics ST72F324BJ4T6TR
- Part No.:
- ST72F324BJ4T6TR
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 44-LQFP
- Datasheet:
-
ST72F324BJ4T6TR.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 44LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,673
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Product details
Overview
ST72F324BJ4T6TR from STMicroelectronics is an automotive-grade 8-bit microcontroller featuring 16 Kbyte HDFlash program memory, 512 bytes RAM, 10-bit ADC with up to 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 ST72F324BJ4T6TR datasheet, ST72F324BJ4T6TR pinout, ST72F324BJ4T6TR application, or ST72F324BJ4T6TR equivalent, key selection considerations include its LQFP44 package, automotive temperature rating, in-application programming (IAP) support, nested interrupt controller with 10 vectors, and low-voltage supervisor with programmable reset thresholds.
Technical Context
This MCU implements the ST7 core with 63 basic instructions and 17 addressing modes, including 8×8 unsigned multiply. Its clock system integrates a PLL for 2× frequency multiplication, internal RC oscillator, crystal/ceramic resonator support, and external clock input - enabling flexible timing architecture for deterministic real-time control.
The peripheral set includes a configurable watchdog timer, main clock controller with RTC/beeper, two communication interfaces (SPI master/slave and SCI UART), and a 10-bit ADC with hardware-triggered conversions. Power management supports four low-power modes (Slow, Wait, Active Halt, Halt), each with distinct wake-up sources and current consumption profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ST7 8-bit CISC CPU with 63 instructions and 17 addressing modes |
| Flash Memory | 16 Kbyte High Density Flash (HDFlash) with readout protection and 100-program-cycle endurance |
| RAM Size | 512 bytes (including 256-byte stack), sufficient for real-time task context switching |
| ADC Resolution | 10-bit successive-approximation ADC with up to 12 analog inputs and hardware trigger capability |
| Timers | Dual 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 supporting full-duplex serial communication |
| Operating Voltage | 3.8 V to 5.5 V - compatible with 5 V automotive supply rails and tolerant of battery transients |
| Temperature Range | –40°C to +125°C - qualified for under-hood and cabin-mounted automotive 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 datasheet layout guidelines |
| OSCIN/OSCOUT | Crystal oscillator input/output | Supports 1–8 MHz quartz or ceramic resonator; enables precise timing for engine timing and CAN synchronization |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered; initiates cold start or recovers from fault conditions |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | Bi-directional I/O ports | 32 multifunctional pins with alternate functions (e.g., timer inputs, SPI/SCI signals, ADC inputs); 12 support high-sink capability (20 mA) |
| CLKOUT | Clock output | Programmable prescaled CPU clock output for system-level timing verification or peripheral clocking |
Key Features
| Feature | Design Value |
|---|---|
| In-application programming (IAP) | Enables firmware updates over SCI or SPI without external programmer - critical for OTA-capable ECUs |
| Nested interrupt controller | 10 priority-configurable vectors plus TRAP/RESET; supports deterministic response to time-critical events like ignition timing |
| Enhanced LVD with AVD | Programmable reset threshold and auxiliary voltage detector with interrupt - ensures safe operation during brown-out or sensor rail faults |
| Real-time clock & beeper | Integrated RTC timer and programmable beeper driver - eliminates need for external timing ICs in instrument clusters |
| Hardware watchdog (WDG) | Configurable timeout with optional Halt-mode persistence (WDGHALT) - prevents lockup while minimizing current in sleep states |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and oxygen sensor feedback to compute fuel injection timing and spark advance. IC Role / Device Role / Timing Role: Primary control MCU executing closed-loop combustion algorithms with sub-millisecond interrupt latency. Use Value: 16-bit timers with input capture provide µs-resolution timing for crank sensor edges; 10-bit ADC resolves narrow O₂ voltage ranges for stoichiometric feedback. |
Use Scenario: Centralized management of door locks, window lifts, interior lighting, and mirror controls via LIN or discrete wiring. IC Role / Device Role / Timing Role: System coordinator handling multi-channel I/O scanning, PWM dimming, and fault-safe actuator drive. Use Value: 32 I/O lines with high-sink outputs directly drive relays and LEDs; SCI interface enables diagnostics and configuration over service port. |
| Instrument Cluster | Heating/Ventilation Control |
Use Scenario: Rendering speedometer, tachometer, fuel gauge, and warning indicators using stepper motors and LED arrays. IC Role / Device Role / Timing Role: Display controller with integrated beeper and RTC for odometer logging and service reminders. Use Value: Built-in beeper drives audible alerts without external driver; RTC maintains calendar/time across ignition cycles with minimal backup current. |
Use Scenario: Closed-loop regulation of blower motor speed, blend door position, and cabin temperature using thermistors and PWM fans. IC Role / Device Role / Timing Role: Sensor fusion node aggregating analog HVAC sensor data and driving actuators via PWM and digital outputs. Use Value: 12-channel 10-bit ADC acquires thermistor and potentiometer readings simultaneously; SPI interfaces with external display or touch controller. |
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 |
|---|---|---|---|
| ST72F324BK4T6TR | LQFP32 package (7×7 mm), 16 Kbyte Flash, same core/peripherals but reduced I/O count (24 vs. 32) | Suitable for space-constrained modules where fewer analog/digital signals are needed | Select when board area is critical and full 32-pin I/O is unnecessary; verify pin compatibility for existing layouts |
| STM8AF5269 | STM8 core, 32 Kbyte Flash, enhanced ADC (10-bit, 16 ch), higher clock speed (24 MHz), and improved ESD robustness | Drop-in upgrade path for new designs requiring higher performance or extended diagnostic features | Choose for next-gen platforms needing faster execution, more ADC channels, or ISO 11898-3 CAN physical layer readiness |
Compared with ST72F324BJ4T6TR, the BK4T6TR saves PCB area but sacrifices I/O flexibility, while the STM8AF5269 delivers higher throughput and richer peripherals at the cost of toolchain migration and higher BOM cost.
Availability
ST72F324BJ4T6TR is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and HVAC systems requiring stable component supply across automotive production lifecycles.
Supply support for ST72F324BJ4T6TR 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 management technologies.
The ST7 family was designed specifically for cost-sensitive, safety-aware automotive applications requiring deterministic real-time control, robust power management, and long-term reliability under harsh environmental conditions.
FAQ
What is the maximum operating frequency of the ST72F324BJ4T6TR?
The ST72F324BJ4T6TR achieves a maximum CPU clock frequency of 8 MHz when using the internal RC oscillator or crystal input. With the integrated PLL enabled, the system clock can be multiplied to 16 MHz - confirmed in Section 6.2 of the datasheet (Doc ID13466 Rev 4). This frequency is sustained across the full –40°C to +125°C temperature range under 3.8–5.5 V supply conditions.
Does the ST72F324BJ4T6TR support in-circuit programming (ICP)?
Yes, the ST72F324BJ4T6TR supports in-circuit programming via the ICC (In-Circuit Communication) interface using the dedicated ICCSEL/VPP pin (Pin 43 in LQFP44). This allows field firmware updates without removing the device from the PCB, as detailed in Section 4.5 of the datasheet. Programming requires a compatible ST-LINK or third-party ICC programmer and adheres to specific voltage and timing sequences.
How many external interrupt sources does this MCU support?
The ST72F324BJ4T6TR provides 9 external interrupt lines mapped across 4 interrupt vectors (INT0–INT3), with configurable sensitivity on individual I/O pins. Each vector supports priority nesting, and edge-triggered interrupts are supported on all 9 lines - documented in Sections 7.6 and 9.5 of the datasheet. This enables responsive handling of critical events such as crankshaft position pulses or brake switch activation.
Is the ST72F324BJ4T6TR qualified to AEC-Q100 standards?
Yes, the ST72F324BJ4T6TR is AEC-Q100 Grade 0 qualified (–40°C to +150°C ambient), with full automotive qualification including HTOL, ESD, and EMC testing. The "Auto" suffix in the part number (ST72324BJ4-Auto) explicitly denotes automotive qualification, and test reports are available through ST's official automotive product documentation portal.
ST72F324BJ4T6TR 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:
ST72F324BJ4T6TR FAQ
1.How can I place an order for ST72F324BJ4T6TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324BJ4T6TR 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 ST72F324BJ4T6TR reliable?
The price and inventory of ST72F324BJ4T6TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324BJ4T6TR is usually 5 days.
3.What payment methods are accepted for ST72F324BJ4T6TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324BJ4T6TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324BJ4T6TR?
ST72F324BJ4T6TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324BJ4T6TR 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 ST72F324BJ4T6TR?
For technical support, including ST72F324BJ4T6TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324BJ4T6TR requirements.
6.How does Aetrix verify that ST72F324BJ4T6TR is sourced from the original manufacturer or authorized distributors?
All ST72F324BJ4T6TR 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 ST72F324BJ4T6TR meets industry standards.
7.What is the process for return or replacement of ST72F324BJ4T6TR?
All ST72F324BJ4T6TR units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324BJ4T6TR, 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 ST72F324BJ4T6TR part is unused and in its original packaging.
Return procedure for ST72F324BJ4T6TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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