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-constra