STC15F101W-35I Microcontroller IC SOP-8

STC15F101W-35I Microcontroller IC (SOP-8) is a compact and high-performance microcontroller designed for efficient embedded control. Built on an enhanced 8051 architecture with a single-clock-per-instruction (1T) core, it delivers impressive speed while maintaining compatibility with standard 8051 instructions. Its SOP-8 package makes it ideal for space-limited projects, offering both cost efficiency and dependable performance for designers seeking a simple yet powerful solution.

Key Features:

• 1T Enhanced 8051 Core: Executes most instructions in a single clock cycle—up to 12x faster than conventional 8051 MCUs.
• Wide Frequency Range: Operates from 0 to 35 MHz, providing flexibility for both low-power and high-speed designs.
• Integrated Oscillator: Includes a precise internal R/C oscillator (±0.3% accuracy) that eliminates the need for an external crystal.
• Built-in Reset Circuit: Provides automatic power-on reset and multiple threshold options for improved system stability.
• Low Power Operation: Supports Idle, Stop, and Slow-Down modes to minimize current draw in battery-powered systems.
• ISP/IAP Functionality: Allows firmware updates directly through serial interface—no external programmer required.
• Firmware Protection: Utilizes STC’s security features to protect proprietary software from unauthorized access.
• Compact 8-Pin Package: Offers up to 6 programmable I/O pins for maximum flexibility in small designs.

Technical Specifications:

• CPU Architecture: Enhanced 8051 (1T single-cycle)
• Operating Frequency: 0 – 35 MHz
• Flash Memory: 1 KB program memory with ISP/IAP support
• SRAM: 128 bytes on-chip
• EEPROM: Built-in data EEPROM with 100K write/erase cycles
• I/O Ports: 6 configurable general-purpose I/O lines
• Timers/Counters: Two 16-bit timers (T0 and T2)
• Operating Voltage: 3.8V – 5.5V
• Package Type: SOP-8 (Surface Mount)

Mechanical Specifications:

• Package: SOP-8 (Small Outline Package)
• Mounting Type: Surface Mount Technology (SMT)
• Pin Count: 8 pins total
• Moisture Sensitivity Level (MSL): Level 3 (verify with supplier)

Dimensions:

The SOP-8 package features a slim, rectangular footprint optimized for compact PCB layouts. Consult the manufacturer’s datasheet for precise mechanical details, typically measuring about 4.9 mm × 3.9 mm with a standard 1.27 mm pin pitch.

Pinout and Wiring:

This 8-pin MCU dedicates pins to power, ground, and multifunction I/O. Basic operation requires VCC and GND connections, while remaining pins act as configurable I/O lines (P3.0–P3.5) supporting digital I/O, interrupts, and timers. A UART interface can be used for programming and serial communication.

• VCC & GND: Power and ground connections for MCU operation.
• P3.x Pins: Multipurpose I/O pins capable of digital input/output and interrupt/timer functions.
• Note: The device integrates its own oscillator and reset circuit, reducing external component needs to just a decoupling capacitor.

Datasheet Reference:

• Download Datasheet (STC15F101W-35I Microcontroller Overview)

Commonly Used in:

• Compact Embedded Devices: Ideal for simple, space-limited designs requiring reliable performance.
• Home Automation: Powers control logic in smart lighting and appliance interfaces.
• IoT Nodes: Fits battery-powered sensor nodes and portable data loggers.

Applications:

• LED Control: Handles timing and brightness control in LED drivers and lamps.
• Motor Control: Supports basic speed or directional control for small DC motors.
• Data Acquisition: Reads and processes sensor signals in monitoring applications.
• Security Systems: Implements logic control for access panels and alarm triggers.

Equivalent Models:

• STC15W101-35I: A DIP-8 version of the same core for breadboard prototyping.
• AT89C2051: Classic 8051-compatible MCU with slower execution but similar pinout.
• CS51 Series: Comparable 8051-compatible microcontrollers from other manufacturers.

Package Includes:

• 1 x STC15F101W-35I Microcontroller IC (SOP-8)