CP2105 in Silicon Labs CP2102 / CP2104 Family
The CP2105 is a highly integrated USB-to-Dual-UART Bridge Controller manufactured by Silicon Labs. Designed to simplify the transition from legacy serial interfaces to USB, this device eliminates the need for complex firmware development or external timing components. It integrates a USB 2.0 full-speed function controller, a crystal-less oscillator, one-time programmable memory, and two asynchronous serial data buses with full modem control signals into a single compact QFN24 package for efficient PCB space utilization.
Variants in This Sub-Family
The CP2105 family is focused on the F01 revision, which provides the core dual-UART functionality. Differences within the ordering part numbers typically relate to packaging formats, such as bulk versus tape-and-reel (GM vs GMR). While the hardware remains consistent, the internal programmable ROM allows developers to create custom variants by modifying Vendor IDs, Product IDs, and power descriptors to suit specific branding or driver requirements.
