CP2108 in Silicon Labs CP2102 / CP2104 Family
The CP2108 is a highly integrated USB-to-Quad-UART bridge controller manufactured by Silicon Labs. Designed to simplify the migration from legacy RS-232/RS-485 interfaces to USB, this family provides a single-chip solution that includes a USB 2.0 full-speed function controller, USB transceiver, oscillator, and four asynchronous serial data buses (UART). By eliminating the need for external timing components and complex firmware development, the CP2108 allows engineers to add multi-port serial connectivity to embedded systems with minimal PCB footprint and design effort.
Variants in This Sub-Family
Variants within the CP2108 sub-family, such as the B02 and B03 revisions, primarily differ in their internal firmware optimizations and support for specific power management states. The B03 revision is the most current, offering improved compatibility with modern host controllers and refined GPIO behavior during suspend modes. All variants maintain the 64-QFN package footprint to ensure pin-to-pin compatibility across hardware iterations.
