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STMicroelectronics ST72F324BK6T6
- Part No.:
- ST72F324BK6T6
- Manufacturer:
- STMicroelectronics
- Category:
- Microcontrollers
- Package:
- 32-LQFP
- Datasheet:
-
ST72F324BK6T6.pdf
- Description:
- IC MCU 8BIT 32KB FLASH 32LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,349
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Product details
Overview
ST72F324BK6T6 from STMicroelectronics is an automotive-grade 8-bit MCU featuring 32 Kbyte HDFlash, 1024-byte RAM, 10-bit ADC with 12 input channels, dual 16-bit timers (Timer A and Timer B), SPI/SCI serial interfaces, and PLL-based clock multiplication - deployed in engine control units and body electronics requiring extended temperature operation up to 125°C.
For engineers reviewing the ST72F324BK6T6 datasheet, ST72F324BK6T6 pinout, ST72F324BK6T6 application, or ST72F324BK6T6 equivalent, key selection criteria include its -40°C to +125°C operating range, LQFP44 package with 32 I/O lines, programmable low-voltage detector (LVD), in-application programming (IAP) support, and automotive qualification per AEC-Q100.
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 integrates crystal/ceramic resonator oscillators, internal RC oscillator, and external clock input, augmented by a PLL for 2× frequency multiplication. Power management includes four low-power modes: Slow, Wait, Active Halt, and Halt - each with distinct wake-up sources and current consumption profiles.
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 High Density Flash (HDFlash) with readout protection and 100-cycle endurance |
| RAM | 1024 bytes (including 256-byte stack), SRAM with retention during low-power modes |
| ADC | 10-bit successive-approximation ADC with up to 12 analog input channels and configurable sampling rate |
| Timers | Two 16-bit timers: Timer A (1 capture/1 compare/PWM), Timer B (2 capture/2 compare/PWM) |
| Communication | SPI synchronous interface and SCI asynchronous serial interface (UART-compatible) |
| Operating Range | 3.8 V to 5.5 V supply voltage, -40°C to +125°C ambient temperature (AEC-Q100 qualified) |
Pinout & Package
LQFP44 (10 × 10 mm, 0.8 mm pitch) package with 32 multifunctional bidirectional I/O lines, 22 alternate function lines, and 12 high-sink outputs capable of 20 mA per pin.
| 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/resonator interface | Supports 1–8 MHz external crystal or ceramic resonator; internal load capacitors configurable via register |
| RESET | Asynchronous reset input | Active-low, Schmitt-triggered, compatible with open-drain or push-pull reset sources |
| PA0–PA7, PB0–PB7, PC0–PC7, PD0–PD7 | General-purpose I/O ports | 32 total I/O lines; individually configurable as input/output with pull-up, open-drain, or high-sink capability |
| ADC_IN0–ADC_IN11 | Analog input channels | 12 dedicated or multiplexed pins for 10-bit ADC conversion; share physical pins with PORTA/PORTC |
| CLKOUT, BEEP, RTC_OUT | Clock and timing outputs | Programmable clock-out signal, beeper driver output, and real-time clock pulse output for system timing verification |
Key Features
| Feature | Design Value |
|---|---|
| In-application programming (IAP) | Enables firmware updates over SCI or SPI without external programmer; critical for field calibration in automotive ECUs |
| Enhanced LVD with AVD | Programmable reset thresholds (2.8 V / 3.3 V / 3.8 V) plus auxiliary voltage detector with interrupt for brown-out monitoring |
| Real-time clock & beeper | Integrated RTC timer with calendar functions and dedicated beeper output for audible alerts in dashboard systems |
| High-sink I/O capability | 12 pins support 20 mA sink current - directly drive LEDs or small relays without external drivers |
| Automotive qualification | AEC-Q100 Grade 1 certified (-40°C to +125°C), meeting stringent EMC and reliability requirements for under-hood applications |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
|
Use Scenario: Real-time monitoring of throttle position, coolant temperature, and oxygen sensor signals in gasoline engine management. IC Role / Device Role / Timing Role: Central controller executing closed-loop fuel injection timing, spark advance calculation, and CAN message preprocessing. Use Value: 10-bit ADC resolution enables <1°C temperature accuracy; 16-bit timers provide microsecond-precision PWM for injector drivers. |
Use Scenario: Managing door locks, window lifts, interior lighting, and mirror controls in modern vehicle cabins. IC Role / Device Role / Timing Role: Local intelligence node handling switch debouncing, LED dimming via PWM, and LIN bus communication with master ECU. Use Value: High-sink I/O drives 20 mA LEDs directly; LQFP44 pin count supports 32 discrete I/Os for multi-function integration. |
| Instrument Cluster | Heating/Ventilation Control |
|
Use Scenario: Driving analog gauges, LCD segments, and warning indicators based on CAN bus data and local sensor inputs. IC Role / Device Role / Timing Role: Secondary microcontroller synchronizing display refresh, buzzer alerts, and EEPROM-backed trip data storage. Use Value: Integrated beeper output eliminates external driver; RTC supports odometer timestamping and service interval tracking. |
Use Scenario: Regulating blower motor speed, blend door actuation, and cabin temperature feedback in HVAC subsystems. IC Role / Device Role / Timing Role: Dedicated thermal management unit interfacing with NTC thermistors, PWM-controlled DC motors, and resistive heater elements. Use Value: 12-channel ADC accommodates multiple temperature sensors; 4 power-saving modes reduce standby current to <10 µA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit automotive MCU applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ST72F324BJ6T6 | LQFP44 package same; differs only in marking suffix (J vs K), indicating identical silicon and electrical specs | No functional difference; J-suffix denotes same automotive grade and flash configuration | Select when standard marking or legacy BOM alignment is required |
| STM8AF5269 | 32-bit enhanced ST8 core, 64 Kbyte Flash, higher clock speed (24 MHz), integrated CAN 2.0B controller | Supports CAN-based diagnostics and distributed control; requires updated toolchain and firmware architecture | Choose for new designs needing CAN connectivity or higher processing throughput while retaining footprint compatibility |
Compared with ST72F324BK6T6, ST72F324BJ6T6 offers identical functionality with minor marking variance, whereas STM8AF5269 provides CAN interface and doubled Flash capacity at the cost of architectural migration - making it suitable for next-generation automotive nodes requiring bus-level coordination.
Availability
ST72F324BK6T6 is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and HVAC controllers requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ST72F324BK6T6 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 analog ICs for automotive, industrial, and consumer markets.
The ST7 family was engineered specifically for cost-sensitive, high-reliability automotive applications - emphasizing robustness, extended temperature operation, and integrated peripherals to minimize external components in ECU and BCM designs.
FAQ
Is ST72F324BK6T6 pin-compatible with other ST72F324x variants?
Yes - ST72F324BK6T6 shares the LQFP44 package and identical pinout with all ST72F324BJx and ST72F324BKx variants. Differences are limited to Flash size (8/16/32 Kbyte), RAM allocation, and temperature grade markings; no PCB redesign is needed when scaling memory capacity.
Does ST72F324BK6T6 support in-circuit debugging?
Yes - it features full in-circuit testing (ICT) capability via the ICC (In-Circuit Communication) interface using the dedicated ICCSEL/VPP pin. This enables non-invasive read/write access to Flash and registers during development and production testing without halting CPU execution.
What is the maximum ADC sampling rate for ST72F324BK6T6?
The 10-bit ADC achieves up to 1 MSPS conversion rate when operating at maximum CPU clock (16 MHz) with minimal acquisition time. Actual throughput depends on prescaler settings, channel count, and trigger source - typical sustained rate is 200 kSPS in continuous scan mode across 8 channels.
Can ST72F324BK6T6 operate without an external crystal?
Yes - it includes an internal RC oscillator (8 MHz ±10%) usable for boot code execution and low-accuracy timing. However, automotive applications requiring precise timing (e.g., SCI baud generation or RTC) mandate external crystal/resonator on OSCIN/OSCOUT pins for stability across temperature and voltage.
ST72F324BK6T6 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:
- 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:
ST72F324BK6T6 FAQ
1.How can I place an order for ST72F324BK6T6 through Aetrix?
Please submit a Request for Quotation (RFQ) for ST72F324BK6T6 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 ST72F324BK6T6 reliable?
The price and inventory of ST72F324BK6T6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST72F324BK6T6 is usually 5 days.
3.What payment methods are accepted for ST72F324BK6T6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST72F324BK6T6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST72F324BK6T6?
ST72F324BK6T6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST72F324BK6T6 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 ST72F324BK6T6?
For technical support, including ST72F324BK6T6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST72F324BK6T6 requirements.
6.How does Aetrix verify that ST72F324BK6T6 is sourced from the original manufacturer or authorized distributors?
All ST72F324BK6T6 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 ST72F324BK6T6 meets industry standards.
7.What is the process for return or replacement of ST72F324BK6T6?
All ST72F324BK6T6 units undergo pre-shipment inspection (PSI). If there is an issue with ST72F324BK6T6, 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 ST72F324BK6T6 part is unused and in its original packaging.
Return procedure for ST72F324BK6T6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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