STMicroelectronics ST72F324K6TA

Overview

ST72F324K6TA from STMicroelectronics is an 8-bit Flash microcontroller with 16KB program memory, 512 bytes RAM, 10-bit ADC (12 input channels), dual 16-bit timers (Timer A and Timer B), SPI and SCI serial interfaces, and four power-saving modes. It operates from 3.8V to 5.5V across –40°C to +125°C and targets industrial motor control, sensor interface, and embedded instrumentation systems.

For engineers reviewing the ST72F324K6TA datasheet, ST72F324K6TA pinout, ST72F324K6TA application, or ST72F324K6TA equivalent, this device supports in-application programming (IAP), configurable watchdog timer, real-time clock/beeper capability, and enhanced low-voltage detection with interrupt-enabled auxiliary voltage monitoring - critical for robust operation in harsh environments.

Technical Context

This MCU integrates a multi-oscillator system with internal RC, crystal/ceramic resonator, and external clock inputs, plus a 2× PLL for frequency multiplication. Its nested interrupt controller handles 10 vectors plus TRAP and RESET, with up to 9 external interrupt lines mapped across 4 vectors.

The peripheral set includes a main clock controller (MCC/RTC) delivering real-time base, beep generation, and clock-out signals; Timer A supports PWM, pulse generation, and input capture; Timer B adds dual input capture and dual output compare; and the 10-bit ADC features low-current coupling for noise-immune analog acquisition.

Key Specifications

Pinout & Package

TQFP44 (10 × 10 mm, 0.8 mm pitch) package with 44 leads; lead-free and RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ST72F324K6TA, ST72F324B6TA offers superior Flash longevity and thermal resilience without design changes, while STM8S105K4T6C delivers higher integration and speed at the cost of full hardware/software requalification.

Availability

ST72F324K6TA is available at Aetrix Electronics and suitable for industrial motor control, sensor interface modules, embedded instrumentation panels, and power supply supervision units requiring stable component supply and long-term lifecycle support.

Supply support for ST72F324K6TA 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 industrial, automotive, and consumer markets.

The ST7 family was engineered for cost-sensitive, high-reliability 8-bit embedded control applications demanding robustness, low power, and integrated peripherals - especially in harsh-temperature and electrically noisy environments.

FAQ

Is ST72F324K6TA still recommended for new designs?

No - STMicroelectronics explicitly marks ST72F324K6TA as "Not for New Design" in its official documentation. The ST72F324B6TA is the designated replacement, offering enhanced Flash endurance (1,000 vs. 100 cycles) and extended temperature range (–40°C to +150°C). For greenfield projects, ST72F324B6TA or the STM8S series should be evaluated instead.

What are the supported clock sources for ST72F324K6TA?

The MCU supports three clock sources: external crystal or ceramic resonator (1–8 MHz), internal RC oscillator (8 MHz ±20%), and external clock input (up to 8 MHz). A 2× PLL is available to double the selected source frequency, enabling up to 16 MHz CPU operation. Clock security system detects oscillator failure and triggers reset or interrupt.

Does ST72F324K6TA support JTAG or SWD debugging?

No - ST72F324K6TA does not include JTAG or SWD debug interfaces. It relies on single-wire ICC (In-Circuit Communication) via the ICCSEL/VPP pin for programming and limited debugging. This requires ST's专用 ICC-compatible programmers (e.g., STVP, ST-LINK with ICC adapter) and does not support real-time variable watch or step-through debugging like modern ARM cores.

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

Yes - the ADC can perform conversions in Wait mode (CPU halted, peripherals active) and Slow mode (reduced clock frequency). However, it is disabled in Halt and Active-Halt modes where the main clock is stopped. Wake-up from Wait mode via ADC end-of-conversion interrupt is supported, enabling event-driven sampling with minimal power overhead.