STMicroelectronics ST72F345C4T6TR

Overview

ST72F345C4T6TR from STMicroelectronics is an 8-bit Flash microcontroller featuring 16 KB XFlash program memory, 1 KB RAM, 256-byte data EEPROM, 10-bit ADC with 12 input channels, dual 16-bit timers (Timer A and B), two I²C interfaces (including triple-slave I²C3S with DMA), SPI, SCI (LIN-compatible), and PLL-based clock management. It targets embedded control in automotive body electronics, industrial sensor nodes, and appliance motor control.

For engineers reviewing the ST72F345C4T6TR datasheet, ST72F345C4T6TR pinout, ST72F345C4T6TR application, or ST72F345C4T6TR equivalent, key selection considerations include its 48-pin LQFP package, 5 power-saving modes (Halt, Wait, Active-halt, Slow, Auto-wakeup), integrated window watchdog, and support for in-application programming (IAP) and readout protection.

Technical Context

This MCU implements a Harvard-architecture 8-bit ST7 core with nested interrupt controller (10 vectors + TRAP/RESET), supporting up to 34 multifunctional I/O lines - including 12 high-sink outputs - and configurable clock sources: crystal/resonator, internal RC oscillator (±1% accuracy at 25 °C), or external clock, with PLL multiplication (4× or 8×). Its real-time base and MCC/RTC module enable precise timing and beeper control.

The peripheral set includes a window watchdog timer with Halt-mode compatibility (WDGHALT), two independent I²C controllers (one supporting triple-slave addressing and byte-pair coherency on reads), and a 10-bit ADC with programmable sampling time and scan mode. All peripherals integrate low-power mode awareness and interrupt generation capability.

Key Specifications

Pinout & Package

LQFP48 package (7 × 7 mm, 0.5 mm pitch), thermally enhanced for industrial ambient operation up to 85 °C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM8S003F3P6 and ST7FLITE2K4M6, the ST72F345C4T6TR delivers higher I/O count, triple-slave I²C for sensor arbitration, and LIN-compliant SCI - making it uniquely suited for automotive body electronics and multi-peripheral industrial nodes where protocol flexibility and peripheral density are critical.

Availability

ST72F345C4T6TR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, home appliance motor control, and smart power outlets requiring stable component supply and long-term manufacturing continuity.

Supply support for ST72F345C4T6TR 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 for cost-sensitive, reliability-critical embedded control applications demanding robust flash memory, integrated peripherals, and low-power operation - particularly in automotive body electronics and industrial automation.

FAQ

Does ST72F345C4T6TR support in-application programming (IAP)?

Yes, the ST72F345C4T6TR supports full in-application programming via its built-in ICC interface, allowing firmware updates while the application runs. IAP is enabled through dedicated Flash control registers (FCSR) and requires no external programming hardware - ideal for field upgrades in deployed automotive or industrial units.

What is the maximum operating frequency and clock source flexibility?

The ST72F345C4T6TR operates up to 24 MHz CPU frequency using its internal PLL (4× or 8× multiplication) fed by crystal (1–16 MHz), ceramic resonator, or external clock. The internal RC oscillator runs at 8 MHz ±1% at 25 °C and can serve as primary clock source, eliminating external timing components in cost-sensitive designs.

How many I²C interfaces does this MCU provide, and what are their capabilities?

The ST72F345C4T6TR integrates two physically separate I²C interfaces: one standard multimaster/slave I²C and one triple-slave I²C3S with DMA access and byte-pair coherency on reads. The I²C3S supports three independent slave addresses and is optimized for low-CPU-overhead sensor polling in multi-node systems.

Is there hardware support for LIN communication?

Yes, the SCI peripheral is explicitly LIN 2.0 compliant, supporting automatic sync-break detection, checksum generation/verification, and configurable baud rates down to 1 kbps. This enables direct integration into automotive body networks without external LIN transceivers beyond the physical layer driver.