CH554E USB microcontroller with 16KB ROM 256-bytes IRAM 1.25Kbytes XRAM and DMA MSOP10

Description

CH554E USB microcontroller with 16KB ROM 256-bytes IRAM 1.25Kbytes XRAM and DMA MSOP10

Specifications for the CH554E USB microcontroller:

📦 General Information

• Manufacturer: WCH (Jiangsu QinHeng Corp.)

• Part Number: CH554E

• Core: Enhanced 8051-compatible MCU

• Package: MSOP-10 (0.5 mm pitch, compact form)

• Clock Speed: Up to 24 MHz (internal PLL up to 48 MHz for USB)

• On-chip Oscillator: 12 MHz precision oscillator (calibrated, no external crystal required for USB)

💾 Memory

• Code ROM: 16 KB (Flash, reprogrammable)

• Internal RAM:

  • IRAM: 256 bytes (directly addressable)

  • XRAM: 1.25 KB (1280 bytes, expanded data memory)

• Bootloader: Built-in USB ISP (In-System Programming) – no external programmer needed

⚡ Electrical Characteristics

• Operating voltage: 3.3 V – 5.0 V

• I/O logic levels: TTL/CMOS compatible

• Current consumption: ~12 mA at 12 MHz (typical)

• Low-power modes: Idle, Power-down

📡 Peripherals & Interfaces

• USB:

  • USB 2.0 full-speed device (12 Mbps)

  • Integrated USB transceiver and Serial Interface Engine (SIE)

  • Supports multiple device classes: HID, CDC, MSC

• UART: 2 channels (independent baud generators)

• SPI: Master/slave modes

• PWM: Multiple channels for motor or LED control

• Timers: Enhanced 8051 timers

• DMA: Hardware DMA controller for fast transfers

🌡 Environmental Ratings

• Operating temperature: −40 °C to +85 °C (industrial grade)

• Storage temperature: −55 °C to +125 °C

📏 Package Details (MSOP-10)

• Body size: ~3.0 mm × 3.0 mm

• Lead pitch: 0.5 mm

• Pin count: 10 pins

• Ideal for: Space-constrained USB devices

🔧 Typical Applications

• Miniature USB-HID devices (e.g., dongles, remote controls)

• USB-UART bridge modules

• USB data loggers

• Compact IoT USB nodes

• Firmware-upgradable USB peripherals