Professional IC Distribution & Technical Solutions

The STC90C54AD is a microcontroller manufactured by STC Micro. Below are its specifications, descriptions, and features:

Specifications:

• Core: 8051-based architecture
• Operating Voltage: 3.3V – 5.5V
• Clock Speed: Up to 40MHz (adjustable)
• Flash Memory: 16KB (for program storage)
• RAM: 1KB (data memory)
• EEPROM: 2KB (for data storage)
• I/O Pins: 32 (4 ports, 8 pins each)
• Timers/Counters: 3 (Timer 0, Timer 1, Timer 2)
• UART: 1 (serial communication)
• ADC: None (pure digital MCU)
• PWM: None (requires external modules)
• Interrupts: 8 sources (external, timer, UART, etc.)
• Watchdog Timer: Yes (for system reset)
• Power Modes: Idle and Power-down modes
• Package: PDIP-40, LQFP-44, PLCC-44

Descriptions:

The STC90C54AD is an enhanced 8051-compatible microcontroller with low power consumption and high performance. It is widely used in embedded systems, industrial control, and consumer electronics due to its reliability and cost-effectiveness. It supports ISP (In-System Programming), allowing firmware updates without removing the chip.

Features:

• High-Speed 8051 Core (1T mode available for faster execution)
• Wide Operating Voltage Range (3.3V – 5.5V)
• Built-in Power Management (Idle & Power-down modes)
• On-Chip EEPROM (for non-volatile data storage)
• Multiple Reset Sources (Power-on, watchdog, external reset)
• Strong Anti-Interference Design (for industrial environments)
• ISP/IAP (In-System/In-Application Programming)
• Wide Temperature Range (-40°C to +85°C)

This microcontroller is suitable for applications requiring moderate processing power, low power consumption, and high reliability.