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ST72F621L4M1 from ST,ST Microelectronics

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ST72F621L4M1

Manufacturer: ST, STM

LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS, FLASH OR ROM MEMORY, LVD, WDG, 10-BIT ADC, 2 TIMERS, SCI, SPI

Partnumber Manufacturer Quantity Availability
ST72F621L4M1 ST, STM 37040 In Stock

Description and Introduction

LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS, FLASH OR ROM MEMORY, LVD, WDG, 10-BIT ADC, 2 TIMERS, SCI, SPI The **ST72F621L4M1** is a microcontroller from STMicroelectronics (STM) based on the **ST7** 8-bit core. Below are its key specifications, descriptions, and features:

### **Manufacturer:**  
- **STM (STMicroelectronics)**  

### **Specifications:**  
- **Core:** 8-bit ST7  
- **Operating Frequency:** Up to **8 MHz**  
- **Flash Memory:** **8 KB**  
- **RAM:** **384 bytes**  
- **EEPROM:** **256 bytes**  
- **I/O Pins:** **26** (multiplexed with other functions)  
- **Timers:**  
  - 1 × **16-bit timer** with PWM and input capture  
  - 1 × **8-bit timer**  
- **ADC:** **8-channel, 10-bit**  
- **Communication Interfaces:**  
  - **SPI** (Serial Peripheral Interface)  
  - **I²C** (Inter-Integrated Circuit)  
  - **UART** (Universal Asynchronous Receiver-Transmitter)  
- **Operating Voltage:** **3.0V to 5.5V**  
- **Package:** **SO-28** (Small Outline, 28 pins)  
- **Operating Temperature Range:** **-40°C to +85°C**  

### **Features:**  
- **Low-power modes** (Wait, Halt)  
- **Watchdog Timer (WDT)** for system reliability  
- **On-chip oscillator** with optional external clock  
- **Robust reset circuitry** (Power-On Reset, Low-Voltage Detector)  
- **Industrial-grade reliability** with high noise immunity  

### **Applications:**  
- Industrial control systems  
- Consumer electronics  
- Automotive applications (non-safety critical)  
- Home appliances  

This microcontroller is designed for cost-sensitive embedded applications requiring moderate processing power and peripheral integration.

Application Scenarios & Design Considerations

LOW SPEED USB 8-BIT MCU WITH 3 ENDPOINTS, FLASH OR ROM MEMORY, LVD, WDG, 10-BIT ADC, 2 TIMERS, SCI, SPI

Alternative Part Number

  • STM8S003F3P6 --: Pin-compatible 8-bit MCU from ST's STM8 family with similar Flash/RAM and peripherals; a common migration path for ST7 designs.
  • PIC16F877A-I/P --: Widely available 8-bit MCU with comparable I/O, timers, and memory; suitable functional replacement when firmware is ported.
  • ATmega328P-PU --: Popular 8-bit MCU with similar resource class and broad toolchain support; viable alternative for redesigned or recompiled applications.
  • MC68HC908JL3ECDW --: 8-bit HC08 core MCU with comparable flash and I/O, widely available and pin-compatible in many legacy designs.
  • AT89C51RC-24PU --: 8051-compatible 8-bit MCU with flash memory and similar I/O count, a common alternative for legacy ST7 designs.

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