CH552G 8-Bit ADC 8051 24MHz 16KB Flash USB Microcontroller IC SOP-16

CH552G 8-Bit ADC 8051 24MHz 16KB Flash USB Microcontroller IC SOP-16 is a highly integrated, cost-effective E8051 core microcontroller designed for modern USB-based embedded applications. This versatile chip operates at a 24MHz system clock, delivering significant processing power while maintaining backward compatibility with the classic 8051 instruction set. Consequently, developers can easily migrate legacy code to a more powerful, modern hardware platform. Furthermore, the IC integrates a full-speed USB 2.0 controller and transceiver, enabling direct communication with PCs and other USB hosts without requiring external interface chips. Therefore, you should choose the CH552G to build compact, low-cost custom USB peripherals, automated testing equipment, and smart consumer electronics.

Key Features:

• Enhanced E8051 Core: The microcontroller executes instructions significantly faster than traditional 8051 devices, boosting overall system performance.
• Integrated USB 2.0: It includes a built-in USB device controller that supports full-speed (12 Mbps) and low-speed (1.5 Mbps) data transfers.
• Capacitive Touch Detection: The chip features dedicated hardware to support up to 6 channels of capacitive touch sensing.
• Rich Peripherals: The device packs multiple hardware interfaces, including dual timers, UART, SPI, and dual-channel PWM outputs.
• Built-in ADC: It provides a 4-channel, 8-bit Analog-to-Digital Converter to facilitate direct sensor reading and analog signal processing.

Technical Specifications:

• Core Architecture: Enhanced 8-bit E8051
• Maximum Clock Frequency: 24 MHz (Internal oscillator)
• Program Memory (Flash): 16 KB
• Data Memory (RAM): 256 Bytes Internal + 1 KB xRAM
• Operating Voltage (VCC): 3.3 V or 5.0 V (±5%)
• ADC Resolution: 8-Bit (4 Multiplexed Channels)
• Operating Temperature: −40°C to +85°C

Mechanical Specifications:

• Package Type: SOP-16 (Small Outline Package)
• Mounting Style: Surface Mount Device (SMD)
• Pin Count: 16 Pins
• Lead Frame Material: Copper Alloy

Dimensions:

• Body Length: ≈ 9.9 mm
• Body Width: ≈ 3.9 mm
• Total Width (with leads): ≈ 6.0 mm
• Pin Pitch: 1.27 mm

Pinout and Wiring:

• Pin 12 (VCC): Connect this pin to your 3.3V or 5.0V positive power supply.
• Pin 11 (GND): Connect this pin to the common ground of your circuit.
• Pin 14 (UDP) & Pin 15 (UDM): Route these pins directly to the D+ and D- lines of your USB connector for reliable data communication.
• Pin 4 (P1.4/RXD) & Pin 5 (P1.5/TXD): Utilize these pins for standard UART serial communication.
• Wiring Note: Moreover, you must place a 0.1μF decoupling capacitor as close to the VCC and GND pins as possible to ensure stable operation.

Datasheet Reference:

• Download WCH CH552G Microcontroller Datasheet

Commonly Used in:

• Custom HID Devices: Engineers widely use it to design custom mechanical keyboards, programmable mice, and specialized game controllers.
• USB to Serial Converters: It forms the processing core for compact, cost-effective communication bridges.
• Consumer Electronics: Manufacturers deploy it in LED controllers and small home automation modules.

Applications:

• Macro Keypads: Creating custom shortcut keypads for video editing, streaming, and productivity software.
• Capacitive Touch Panels: Managing touch-sensitive interfaces on modern appliance control boards.
• Hardware Dongles: Building portable USB security tokens or licensing keys for software protection.

Equivalent Models:

• CH554G: A slightly more advanced model in the same family that adds USB Host capabilities alongside the device controller.
• CH551G: A lower-cost variant with reduced memory (10KB Flash); however, it maintains the exact same core USB functionality.
• ATmega32U4: A popular AVR alternative for USB HID projects, although it costs more and requires a significantly larger physical footprint.

Package Includes:

• 1 x CH552G 8-Bit ADC 8051 24MHz 16KB Flash USB Microcontroller IC SOP-16