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ST72F321J9T6 from STM,ST Microelectronics

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ST72F321J9T6

Manufacturer: STM, ST

ST72321

Partnumber Manufacturer Quantity Availability
ST72F321J9T6 STM, ST 1113 In Stock

Description and Introduction

ST72321 The **ST72F321J9T6** is a microcontroller from **STMicroelectronics (STM)**. Below are its key specifications, descriptions, and features based on factual data:

### **Specifications:**
- **Core:** ST7 8-bit microcontroller  
- **Operating Frequency:** Up to **8 MHz**  
- **Program Memory (Flash):** **32 KB**  
- **RAM:** **1 KB**  
- **EEPROM:** **1 KB** (optional, depending on variant)  
- **Operating Voltage:** **4.5V to 5.5V**  
- **Package:** **LQFP-44**  
- **Temperature Range:** **-40°C to +85°C** (Industrial)  
- **I/O Pins:** **38** (multiplexed with other functions)  
- **Timers:**  
  - 2 × 16-bit timers with PWM  
  - 1 × 8-bit timer  
- **Communication Interfaces:**  
  - **SPI** (Serial Peripheral Interface)  
  - **I²C** (Inter-Integrated Circuit)  
  - **UART** (Universal Asynchronous Receiver-Transmitter)  
- **ADC:** **8-channel, 10-bit**  
- **Interrupts:** Multiple interrupt sources with priority levels  
- **Watchdog Timer:** Built-in  

### **Descriptions & Features:**
- **8-bit ST7 Core:** Optimized for cost-sensitive embedded applications.  
- **High Integration:** Combines Flash, RAM, EEPROM, and peripherals in a single chip.  
- **Low Power Modes:** Supports **Wait, Halt, and Active-Halt** modes for power efficiency.  
- **Robust Peripherals:** Includes timers, PWM, ADC, and communication interfaces.  
- **Industrial-Grade:** Designed for harsh environments with extended temperature support.  
- **Development Support:** Compatible with ST’s **ST7 Toolchain** and debuggers.  

This microcontroller is commonly used in **automotive, industrial control, and consumer electronics** applications.  

(Note: Always refer to the official **STMicroelectronics datasheet** for the most accurate and updated information.)

Application Scenarios & Design Considerations

ST72321

Alternative Part Number

  • STM8S208RBT6 --: STM8 series 8-bit MCU with 128KB flash in LQFP64, a natural migration path from the ST72F321J9T6 with similar core performance and peripheral set.
  • MC9S08DZ60MLH --: S08 8-bit MCU with 60KB flash in LQFP64, offering comparable I/O count and peripherals as a cross-vendor alternative.
  • PIC18F87K22-I/PT --: 8-bit MCU with 128KB flash in TQFP64, providing similar memory density and peripheral coverage for drop-in redesign consideration.
  • ATmega64A-AU --: 8-bit AVR MCU in 64-pin TQFP with similar flash, RAM, and I/O count; widely used drop-in functional replacement for legacy 8-bit designs.
  • PIC18F6520-I/PT --: 8-bit PIC MCU in 64-pin TQFP offering comparable memory and peripheral set; a well-supported alternative for ST7-based designs.

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