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The STC89LE52RC is a microcontroller manufactured by STC Microelectronics.

Specifications:

• Core: 8051 (MCS-51 compatible)
• Operating Voltage: 3.3V – 5.5V (Low-voltage operation)
• Clock Speed: Up to 80 MHz (adjustable via software)
• Flash Memory: 8 KB (for program storage)
• RAM: 512 bytes
• EEPROM: None (but supports in-system programming for Flash)
• I/O Pins: 32 (4 ports: P0, P1, P2, P3)
• Timers/Counters: 3 (Timer 0, Timer 1, and Timer 2)
• Serial Communication: 1 UART
• Interrupt Sources: 8
• Power Modes: Idle and Power-down modes for low power consumption
• Watchdog Timer: Yes (WDT for system reset)
• Operating Temperature: -40°C to +85°C
• Package: 40-pin PDIP, PLCC, or LQFP

Descriptions:

• Fully compatible with the 8051 instruction set.
• Supports ISP (In-System Programming) via serial port (UART).
• Low-power design suitable for battery-powered applications.
• High noise immunity and strong anti-interference capabilities.

Features:

• Low-voltage operation (3.3V – 5.5V).
• High-speed execution (1 clock per machine cycle, 6-12 times faster than traditional 8051).
• On-chip RC oscillator (no external crystal required for basic operation).
• Multiple power-saving modes (Idle and Power-down).
• Wide operating temperature range for industrial applications.
• High reliability with watchdog timer and reset circuit.

This microcontroller is commonly used in embedded systems, industrial control, home appliances, and consumer electronics.