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STMicroelectronics ST72F324BK4TAE
- Part No.:
- ST72F324BK4TAE
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST72F324BK4TAE.pdf
- Description:
- IC MCU 8BIT 16KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,194
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Product details
Overview
ST72F324BK4TAE from STMicroelectronics is an automotive-grade 8-bit microcontroller featuring 16 Kbyte HDFlash program memory, 512 bytes RAM, 10-bit ADC with 12 input 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 low-voltage detection (LVD), and four power-saving modes for engine control unit (ECU) and body electronics applications.
For engineers reviewing the ST72F324BK4TAE datasheet, ST72F324BK4TAE pinout, ST72F324BK4TAE application, or ST72F324BK4TAE equivalent, key selection considerations include its AEC-Q100 qualified LQFP44 package, in-application programming (IAP) support, nested interrupt controller with 10 vectors, and automotive-optimized supply management with auxiliary voltage detector (AVD) interrupt capability.
Technical Context
This MCU implements the ST7 core architecture with 63 basic instructions and 17 addressing modes, including 8×8 unsigned multiply. Its clock system combines crystal/RC oscillators, external clock input, and a 2× PLL for flexible timing generation - critical for synchronized sensor sampling and actuator control in automotive subsystems.
The peripheral set is tightly integrated for real-time embedded control: Timer A supports PWM and pulse generation with 1 capture/1 compare channel; Timer B adds dual capture/dual compare; the 10-bit ADC achieves ±2 LSB INL with configurable sampling time; SPI operates up to 4 MHz master mode; SCI supports full-duplex asynchronous communication with programmable baud rate generation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Architecture | ST7 8-bit CISC CPU with 63 instructions and 17 addressing modes - enables compact firmware for resource-constrained automotive nodes. |
| Flash Memory | 16 Kbyte High Density Flash (HDFlash) with readout protection and 100-cycle endurance - supports field firmware updates via IAP/ICP. |
| RAM Size | 512 bytes (including 256-byte stack) - sufficient for real-time task context storage in multi-interrupt ECU routines. |
| ADC Resolution | 10-bit SAR ADC with up to 12 input channels and ±2 LSB integral nonlinearity - meets precision requirements for throttle position and temperature sensing. |
| Timers | Dual 16-bit timers: Timer A (1 capture/1 compare/PWM) and Timer B (2 capture/2 compare/PWM) - enables simultaneous motor phase control and watchdog supervision. |
| Communication | SPI (master/slave, up to 4 MHz) and SCI (asynchronous, programmable baud rate) - provides robust connectivity to sensors, LIN transceivers, and diagnostic tools. |
| Operating Range | 3.8 V to 5.5 V supply, -40°C to +125°C ambient - certified for under-hood automotive environments per AEC-Q100 Grade 1. |
Pinout & Package
LQFP44 (10 × 10 mm, 0.8 mm pitch) package with exposed thermal pad - optimized for thermal dissipation in sealed automotive modules and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD, VSS | Power supply and ground | Dual power domains: VDD powers core/peripherals; VSS provides low-noise reference for ADC and analog comparators. |
| OSCIN/OSCOUT | Crystal oscillator interface | Supports 1–8 MHz quartz crystals or ceramic resonators - enables precise timing for CAN/LIN synchronization when used with PLL. |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7, PE0–PE3 | Multi-function I/O ports | 32 bidirectional pins with alternate functions (e.g., timer inputs, SPI/SCI signals, ADC inputs) - allows flexible board routing without external logic. |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered input with internal pull-up - ensures reliable cold-start and brown-out recovery in noisy vehicle electrical systems. |
| ICCSEL/VPP | In-circuit programming control | Selects ICC programming mode or serves as high-voltage programming input - enables factory and field firmware reprogramming without dedicated debug headers. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced Low-Voltage Detector (LVD) | Programmable reset thresholds (e.g., 4.2 V/3.9 V/3.6 V) with interrupt capability - prevents erratic operation during battery dip events in start-stop systems. |
| In-Application Programming (IAP) | Enables firmware update while running application code - supports OTA-like updates in telematics gateways without halting vehicle subsystems. |
| Nested Interrupt Controller | 10 priority-configurable interrupt vectors plus TRAP/RESET - guarantees deterministic response to safety-critical events like airbag deployment signals. |
| Four Power-Saving Modes | Slow, Wait, Active Halt, and Halt - reduces current to <1 μA in Halt mode with wake-up on external interrupt or RTC alarm, extending battery life in always-on modules. |
| Real-Time Clock & Beeper | Integrated RTC timer with programmable beeper output - eliminates need for external timing ICs in dashboard warning systems and service interval reminders. |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Real-time monitoring of crankshaft position, throttle angle, and coolant temperature in gasoline direct injection systems. IC Role / Device Role / Timing Role: Primary control MCU executing closed-loop fuel injection timing and spark advance algorithms with sub-millisecond jitter tolerance. Use Value: 16-bit timers with PWM output and 10-bit ADC enable precise actuator drive and sensor fusion without external signal conditioning. |
Use Scenario: Centralized management of door locks, window lifts, interior lighting, and mirror adjustment in premium vehicles. IC Role / Device Role / Timing Role: System coordinator interfacing with LIN slaves and driving high-sink outputs (12 mA per pin) for relay and LED loads. Use Value: 32 I/O lines with configurable pull-ups/downs and interrupt-on-change reduce BOM count by eliminating discrete GPIO expanders. |
| Instrument Cluster | Heating/Ventilation Control |
Use Scenario: Driving analog gauges, LCD segments, and audible alerts in digital dashboards compliant with UNECE R151. IC Role / Device Role / Timing Role: Mixed-signal controller generating PWM for stepper motor gauge drives and beeper tones using integrated MCC/RTC resources. Use Value: On-chip beeper and real-time clock eliminate external tone generators and RTC ICs, lowering system cost and PCB area. |
Use Scenario: Closed-loop regulation of HVAC blower speed, blend door position, and cabin temperature via PWM fan control and thermistor readings. IC Role / Device Role / Timing Role: Sensor hub aggregating 10-bit ADC inputs from NTC thermistors and potentiometers while managing SPI-connected display drivers. Use Value: 12-channel ADC with hardware averaging and programmable sampling time improves temperature measurement stability across wide operating ranges. |
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 |
|---|---|---|---|
| ST72F324BJ4T6 | LQFP44 package, same 16 Kbyte Flash/RAM, but rated for -40°C to +85°C industrial range - lacks AEC-Q100 qualification. | Suitable for non-safety-critical cabin modules (e.g., infotainment front-end) where extended temperature is not required. | Select when automotive qualification is unnecessary and cost optimization is prioritized over environmental ruggedness. |
| STM8AF5269 | STM8 core, 32 Kbyte Flash, enhanced ADC (10-bit, 16 ch), higher clock speed (24 MHz), and improved ESD immunity (±8 kV HBM). | Better suited for next-generation ECUs requiring higher computational throughput and stricter EMC performance per ISO 11452-4. | Choose for new designs targeting long-term roadmap alignment and superior analog performance, accepting higher toolchain migration effort. |
Compared with ST72F324BK4TAE, ST72F324BJ4T6 trades automotive qualification for lower cost in benign environments, while STM8AF5269 delivers higher integration and future-proofing at the expense of legacy ST7 code compatibility.
Availability
ST72F324BK4TAE 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 ST72F324BK4TAE 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, with design centers and manufacturing facilities across Europe, Asia, and the Americas.
The ST7 family was engineered specifically for cost-sensitive, high-reliability automotive applications - emphasizing robustness, in-field programmability, and seamless integration of analog/mixed-signal peripherals with minimal external components.
FAQ
Is ST72F324BK4TAE AEC-Q100 qualified?
Yes, ST72F324BK4TAE is qualified to AEC-Q100 Grade 1 (−40°C to +125°C), with test reports covering stress testing, reliability validation, and failure analysis per automotive standards. This qualification is documented in ST's official product change notifications and supported by full PPAP documentation packages.
What programming interfaces does ST72F324BK4TAE support?
It supports In-Circuit Programming (ICP) via the ICC interface using the ICCSEL/VPP pin, and In-Application Programming (IAP) through user firmware executing from RAM. No JTAG or SWIM debug interface is present - programming relies on UART-based bootloader or dedicated ICC programmers such as ST's STVP toolset.
Does ST72F324BK4TAE include hardware CRC or memory protection?
No, ST72F324BK4TAE does not integrate hardware CRC calculation or MPU-based memory protection. Security relies on Flash readout protection bits and software-implemented checksums. For applications requiring certified integrity checking, external co-processors or software libraries must be used.
Can the 10-bit ADC operate during low-power modes?
Yes, the ADC can perform conversions in Slow and Wait modes, with automatic wake-up from Halt mode triggered by ADC end-of-conversion interrupt. However, conversion accuracy degrades slightly in Slow mode due to reduced clock frequency, and full-spec performance requires active CPU clock ≥ 1 MHz.
ST72F324BK4TAE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- 32-LQFP
- Series:
- ST7
- Packaging:
- Tray
- Product Status:
- Obsolete
- Programmable:
- Verified
- Core Processor:
- ST7
- Core Size:
- 8-Bit
- Speed:
- 8MHz
- Connectivity:
- SCI, SPI
- Peripherals:
- LVD, POR, PWM, WDT
- Number of I/O:
- 24
- 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:
ST72F324BK4TAE FAQ
1.How can I place an order for ST72F324BK4TAE through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324BK4TAE 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 ST72F324BK4TAE reliable?
The price and inventory of ST72F324BK4TAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324BK4TAE is usually 5 days.
3.What payment methods are accepted for ST72F324BK4TAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324BK4TAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324BK4TAE?
ST72F324BK4TAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324BK4TAE 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 ST72F324BK4TAE?
For technical support, including ST72F324BK4TAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324BK4TAE requirements.
6.How does Aetrix verify that ST72F324BK4TAE is sourced from the original manufacturer or authorized distributors?
All ST72F324BK4TAE 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 ST72F324BK4TAE meets industry standards.
7.What is the process for return or replacement of ST72F324BK4TAE?
All ST72F324BK4TAE units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324BK4TAE, 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 ST72F324BK4TAE part is unused and in its original packaging.
Return procedure for ST72F324BK4TAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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