CP2102-GM

Controllers Overview

The CP2102-GM is a single-chip USB-to-UART bridge controller from Silicon Labs, housed in a 28-pin QFN (5x5 mm) package. It integrates a USB 2.0 full-speed function controller, transceiver, and a 48 MHz oscillator, eliminating the need for external components. The device features an internal 1024-byte EEPROM for storing VID, PID, and serial numbers. It supports UART baud rates up to 921,600 bps with configurable data formats. The on-chip voltage regulator provides a 3.3 V output, allowing operation from USB bus power (4.0–5.25 V) or self-powered configurations (3.0–3.6 V).

Controllers Feature Summary

• Integrates USB 2.0 full-speed controller and transceiver without external resistors.
• Includes internal 1024-byte EEPROM for customizable USB descriptors and serial numbers.
• Supports complete RS-232 modem control signals including RTS, CTS, DSR, DTR, DCD, and RI.
• Features an on-chip voltage regulator providing 3.3 V output for system power.

Controllers Applications

• Upgrading legacy RS-232 devices to USB interfaces.
• Creating cellular phone USB interface cables.
• Implementing USB to RS-232 serial adapters.
• General-purpose USB-to-UART data transfer solutions.

Controllers Procurement Notes

Verify the specific ordering suffix GM corresponds to the RoHS-compliant QFN-28 package variant. Confirm that the internal EEPROM requires programming via USB during manufacturing to set unique Vendor IDs, Product IDs, and serial numbers for OEM integration. Ensure design compatibility with the 5x5 mm footprint and check for recommended decoupling capacitance on the REGIN pin.

Controllers Selection Notes

Select this component when a compact solution is needed to replace RS-232 level translators with minimal PCB space. It is suitable for designs requiring full hardware handshaking signals. Consider the CP2102N series for newer designs offering compatible footprints. Ensure the application utilizes Windows, Mac OS-X, or Linux environments supported by the provided Virtual COM Port drivers.

Controllers Part Context

The CP2102-GM belongs to the CP2102/9 family of USB-to-UART bridge controllers. It is pin-compatible with the CP2101-GM and shares the same physical footprint as the CP2109, which differs only in having one-time programmable EPROM instead of EEPROM. This family is designed to simplify USB integration into existing serial-based systems.

Controllers Replacement Considerations

The CP2102N devices are recommended for new designs due to updated features while maintaining compatible footprints. The CP2109-A01-GM is a pin-compatible alternative featuring one-time programmable EPROM instead of EEPROM.