STMicroelectronics ST72F324BK6T3

Overview

ST72F324BK6T3 from STMicroelectronics is an automotive-grade 8-bit microcontroller featuring 32 Kbyte HDFlash program memory, 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 sensor interface modules in passenger vehicles.

For engineers reviewing the ST72F324BK6T3 datasheet, ST72F324BK6T3 pinout, ST72F324BK6T3 application, or ST72F324BK6T3 equivalent, key selection considerations include its AEC-Q100 qualified operation, in-application programming (IAP) support, nested interrupt controller with 10 vectors, low-voltage supervisor with programmable thresholds, and LQFP44 package compatibility for automotive PCB layouts.

Technical Context

This MCU implements a Harvard architecture with 63 basic instructions and 17 addressing modes, including 8×8 unsigned multiply. Its clock system integrates crystal/RC/external sources plus a 2× PLL for CPU frequency scaling, enabling precise real-time base generation and clock-out functionality.

The peripheral set includes a configurable watchdog timer, main clock controller with RTC/beeper, two 16-bit timers supporting PWM, input capture, and pulse generation, and a 10-bit ADC with analog input multiplexing-each designed for deterministic timing and fault-tolerant operation in safety-critical automotive subsystems.

Key Specifications

Pinout & Package

LQFP44 (10 × 10 mm, 0.8 mm pitch) package with exposed thermal pad; RoHS-compliant, lead-free finish.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit automotive microcontroller applications.

Compared with ST72F324BK6T3, ST7FLITE2K4 offers reduced memory and clock capability but identical packaging and toolchain support, while MC9S08DZ60 provides CAN and larger memory at the cost of software incompatibility and absence of automotive-specific analog supervision features.

Availability

ST72F324BK6T3 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS sensor interface designs requiring stable component supply through extended automotive production lifecycles.

Supply support for ST72F324BK6T3 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 solutions with vertical manufacturing and AEC-Q100 qualification expertise.

The ST7 family was engineered specifically for cost-effective, robust 8-bit automotive control applications-emphasizing analog integration, flash reliability, and real-time determinism in harsh environments.

FAQ

Is ST72F324BK6T3 AEC-Q100 qualified?

Yes, ST72F324BK6T3 is AEC-Q100 Grade 2 qualified (–40°C to +105°C junction temperature), with full test documentation per Rev 4 of Doc ID13466. It meets stress testing requirements for automotive electronics including HTOL, TCT, and ESD (HBM ±2 kV, CDM ±1 kV).

Does it support in-circuit programming (ICP)?

Yes, ST72F324BK6T3 supports ICP via the ICC interface using the ICCSEL/VPP pin. Programming is performed with standard ST tools (e.g., STVP) and requires no external high-voltage supply-the VPP function is internally generated during programming mode.

What is the maximum operating frequency?

The maximum CPU frequency is 24 MHz, achieved using the internal PLL with 2× multiplication of an 8 MHz crystal or external clock. The PLL lock time is specified at 100 µs typical, and the system clock remains stable across the full automotive temperature and voltage range.

Can the 10-bit ADC operate during low-power modes?

Yes, the ADC can perform conversions in Slow and Wait modes, with automatic wakeup from Halt mode upon trigger event. Conversion results are accessible via memory-mapped registers, and ADC interrupts remain functional to notify firmware of completion without CPU polling.