STMicroelectronics ST72F344K4T6TR

Overview

ST72F344K4T6TR from STMicroelectronics is an 8-bit Flash microcontroller featuring 16 Kbytes XFlash program memory, 1 Kbyte RAM, 256 bytes data EEPROM, 10-bit ADC with 12 input channels, two 16-bit timers (Timer A and Timer B), dual I²C interfaces (including triple-slave I²C with DMA), SPI, SCI (LIN-compatible), and integrated PLL for 4×/8× clock multiplication. It targets embedded control in industrial sensors and motor-driven appliances requiring nonvolatile parameter storage and low-power operation.

For engineers reviewing the ST72F344K4T6TR datasheet, ST72F344K4T6TR pinout, ST72F344K4T6TR application, or ST72F344K4T6TR equivalent, key selection considerations include its 32-pin LQFP package, 10,000 Flash write/erase cycles, 300,000 EEPROM endurance, nested interrupt controller with 10 vectors, and support for five power-saving modes including Auto-wakeup from Halt.

Technical Context

This MCU implements the ST7 core with 63 basic instructions, 17 addressing modes, and illegal opcode detection. Its clock system integrates a programmable PLL, internal RC oscillator (±1% accuracy at 25 °C), crystal/ceramic resonator support, and auxiliary voltage detector (AVD) for supply monitoring.

The peripheral set includes a configurable window watchdog timer, real-time base, I²C multimaster/slave with byte-pair coherency on reads, SCI with LIN physical layer compliance, and 16-bit timers supporting PWM, input capture, output compare, and pulse generation - all operable across multiple low-power modes.

Key Specifications

Pinout & Package

LQFP32 package (7 × 7 mm, 0.8 mm pitch), 32-pin quad flat pack with exposed thermal pad - optimized for compact industrial PCB layouts and thermal dissipation in enclosed enclosures.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8S003F3P6 and EFM8BB10F8G-A-QSOP24, the ST72F344K4T6TR delivers superior I²C concurrency via hardware triple-slave support, guaranteed LIN-compatible SCI timing, and higher EEPROM endurance - making it optimal for industrial nodes requiring long-term reliability and bus efficiency.

Availability

ST72F344K4T6TR is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance control units, energy metering modules, and building automation controllers requiring stable component supply across extended product lifecycles.

Supply support for ST72F344K4T6TR 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 management ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The ST7 family was engineered for cost-sensitive, resource-constrained embedded control applications demanding high reliability, low power, and integrated peripherals - particularly in white goods, industrial instrumentation, and metering.

FAQ

What is the maximum operating frequency of the ST72F344K4T6TR?

The ST72F344K4T6TR achieves a maximum CPU frequency of 8 MHz using its internal RC oscillator or external crystal. With the integrated PLL enabled, the system clock can be multiplied to 32 MHz (4×) or 64 MHz (8×), though the core remains limited to 8 MHz operation - the higher frequencies drive peripheral clocks such as ADC and timers for improved sampling resolution and PWM granularity.

Does the ST72F344K4T6TR support in-circuit debugging?

Yes, the ST72F344K4T6TR includes an on-chip debug module compatible with ST's ST-LINK and third-party ICE tools. It supports full-speed execution, breakpoint setting, register and memory inspection, and single-stepping via the dedicated SWIM (Single Wire Interface Module) pin - enabling real-time firmware validation without requiring dedicated debug headers or trace pins.

How many I²C interfaces does the ST72F344K4T6TR have, and what are their capabilities?

The ST72F344K4T6TR features two physically separate I²C interfaces: one standard multimaster/slave I²C and one enhanced triple-slave I²C (I2C3S) with DMA access. The triple-slave interface supports three independent 7-bit addresses, maintains byte-pair coherency during read sequences, and offloads bus transactions from the CPU - enabling concurrent sensor polling without interrupt latency penalties.

Is the ST72F344K4T6TR RoHS compliant and qualified for industrial temperature range?

Yes, the ST72F344K4T6TR is RoHS compliant and specified for operation across the industrial temperature range of −40 °C to +85 °C. Its electrical characteristics - including Flash endurance, EEPROM retention, and supply current - are fully characterized and guaranteed over this range, per STMicroelectronics' production data sheet Doc ID 12321 Rev 6.