CP2108-B02-GM USB 2.0 to Quad-UART Bridge | Silicon Labs
N.º de pieza: CP2108-B02-GM ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $0 | $0,00 |
| 10 | $0 | $0,00 |
| 100 | $0 | $0,00 |
| 500 | $0 | $0,00 |
| 1.000 | $0 | $0,00 |
CP2108-B02-GM Descripción general
A USB-to-UART bridge is an interface controller that translates USB traffic from a host into one or more UART streams and transfers UART data back to the host. The CP2108 belongs to the USB bridge controller category, within interface ICs and broader computer-interface semiconductors. It is intended for updating legacy RS-232 and RS-485 designs, industrial equipment, data acquisition systems, and multiport serial adapters.
The verified manufacturer data identifies USB 2.0 full-speed operation, four UART interfaces, full modem controls, 16 digital I/O pins, on-chip EEPROM customization, and a 64-QFN package. The EEPROM can store USB VID, PID, product-description strings, power-descriptor information, device release numbers, and interface strings, allowing one device design to support product-specific USB enumeration requirements. Royalty-free drivers are also identified on the manufacturer product-page result.
The bridge consolidates four UART channels and digital control lines behind one USB port, reducing connector count and PCB area compared with four discrete USB-to-serial devices. Its 9 mm x 9 mm QFN package supports compact embedded designs, but the exposed thermal and electrical layout must follow the manufacturer’s recommended footprint and decoupling requirements. Detailed voltage ranges, UART baud-rate limits, current limits, operating-temperature limits, and pin-level electrical thresholds are not present in the supplied verified excerpts and therefore are not inferred here.
Typical applications include industrial serial gateways, four-port RS-232 adapters, RS-485 equipment with external transceivers, programmable automation controllers, instrumentation, and USB-to-quad-UART test fixtures. The bridge is especially useful when legacy peripherals require independent UART channels but the enclosure must expose only one USB connector.
Designers should verify driver support for the target operating system, confirm that all required modem-control signals are externally reachable, and route USB differential pairs as a controlled-impedance pair. The 64-QFN footprint also demands careful assembly planning because lead spacing is too fine for conventional through-hole hand soldering; a reflow profile and land-pattern review should be validated before volume production.
This page consolidates the verified manufacturer and distributor facts, distinguishes documented functions from unavailable specifications, and adds practical guidance for USB layout, firmware compatibility, and four-UART system integration.
Alternativas directas para CP2108-B02-GM — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con CP2108-B02-GM (mismo factor de forma y huella) — difiere en Package, Driver Support, EEPROM Customization, Integrated Functions, Product Type.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
CP2108-B02-GMR
✅ Sustitución directa✓ En stock
$3.7827 / unidad
Ver hoja de datos →CP2108-B02-GM Especificaciones
| Product Type | USB-to-Quad-UART bridge controller |
| USB Specification | USB 2.0 full-speed |
| Number of UART Interfaces | 4 |
| Digital I/O Pins | 16 |
| UART Modem Control | Full modem-control signals |
| Integrated Functions | USB controller, USB transceiver, oscillator, EEPROM, and 4 UARTs |
| EEPPC | On-chip custom EEPROM |
| EEPROM Customization | USB VID, PID, product strings, power descriptor, release number, and interface strings |
| Encapsulado | 64-pin QFN, 9 mm x 9 mm |
| Tipo de montaje | Surface mount |
| Serial Bus Type | Asynchronous UART |
| Legacy Interface Support | RS-232 and RS-485 design migration |
| Driver Support | Royalty-free drivers |
Guía de configuración de pines de CP2108-B02-GM 64-pin qfn, 9 mm x 9 mm
Configuración de pines para CP2108-B02-GM (encapsulado 64-pin qfn, 9 mm x 9 mm). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para CP2108-B02-GM.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
CP2108-B02-GM es adecuado para 6 aplicacións: Four-Port USB-to-UART Adapter, Industrial Serial Gateway, RS-232 Legacy Interface Upgrade, RS-485 Multiport Controller, Programmable Automation Controller, Data-Acquisition and Test Fixture.
Four-Port USB-to-UART Adapter
The CP2108-B02-GM fits a compact adapter that exposes four independent UART channels through one USB connector. Its four asynchronous serial buses reduce the need for four separate USB-to-serial controllers, while the documented 16 digital I/O pins can support additional control functions. The integration of the USB controller, transceiver, oscillator, EEPROM, and UARTs can simplify the design and reduce PCB area. Firmware must enumerate four ports consistently, and the host driver must match the selected operating system and device configuration.
Recomendado
Industrial Serial Gateway
The CP2108-B02-GM is appropriate for an industrial gateway consolidating four UART-connected instruments behind one USB uplink. Its full modem-control signals and 16 digital I/O pins provide more capability than a basic one-port bridge, while the 9 mm x 9 mm QFN helps limit controller footprint. A production design still must verify temperature range, isolation, surge protection, grounding, and regulatory requirements from the complete data sheet. USB routing and exposed-pad layout should be reviewed before high-volume assembly.
Recomendado
RS-232 Legacy Interface Upgrade
The CP2108-B02-GM can modernize equipment that originally used several RS-232 ports by presenting four UART channels through USB. The bridge supplies the USB-side controller and UART logic with full modem-control signals, allowing legacy software and cabling concepts to be retained where suitable. Level translation and protection still depend on the external RS-232 transceiver arrangement. The design should enumerate ports deterministically, validate driver support, and test all modem-control transitions across operating-system updates.
Recomendado
RS-485 Multiport Controller
The CP2108-B02-GM can serve as the USB-to-UART controller in a four-channel RS-485 product. Its four asynchronous serial buses and full modem-control signals provide a compact USB interface, but external RS-485 drivers, receivers, isolation, termination, and surge protection remain necessary. The 16 digital I/O pins may assist with control or multiplexing where the system architecture permits. Firmware should manage bus turnaround and direction control carefully because the verified material does not specify internal timing limits.
Recomendado
Programmable Automation Controller
The CP2108-B02-GM fits compact automation equipment that needs one USB programming port and four channels of serial peripheral connectivity. The on-chip EEPROM can store customized USB identification and descriptor information, supporting product-specific enumeration without relying only on default host identifiers. Its 64-QFN package and 16 digital I/O pins make board integration efficient, but the fine-pitch footprint requires controlled assembly. Firmware should map each UART and digital line clearly to avoid conflicts during boot and peripheral updates.
Recomendado
Data-Acquisition and Test Fixture
The CP2108-B02-GM can connect four UART-based instruments, programmable instruments, or test modules to a host over one USB connection. Four UART channels reduce cable and bridge count compared with separate single-port adapters, while the compact 9 mm x 9 mm QFN preserves board area in dense fixtures. Port-mapping software must remain stable for automated test sequences, and the system should validate throughput, baud rate, cable behavior, and USB suspend or resume requirements from the complete manufacturer documentation.
Recomendado
Datos de referencia de ingeniería para CP2108-B02-GM — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | CP2108-B02-GMR |
|---|---|---|
| Package | 64-QFN (9x9) | 64-QFN (9x9) |
| Brand | Silicon Labs | Silicon Labs |
| Product Function | USB 2.0 to quad-UART bridge | USB 2.0 to quad-UART bridge |
| USB Speed | USB 2.0 full-speed | USB 2.0 full-speed |
| UART Channels | 4 | 4 |
| Digital I/O Pins | 16 | 16 |
| Integrated EEPROM | Yes | Yes |
| Modem Control | Full modem-control signals | Full modem-control signals |
| Driver Support | Royalty-free drivers | Royalty-free drivers |
| Unit Price as of 2026-10-22 | $0.00 placeholder; verified numeric price unavailable | $0.00 placeholder; verified numeric price unavailable |
Diferenciadores clave
- Four-channel consolidation behind one USB port (frente a Single-port USB-to-UART bridge)
- Integrated digital I/O and modem control (frente a Basic single-port USB-UART converter)
- Integrated configurable USB identity (frente a Bridge requiring separate identification storage)
Notas de diseño
Use the official CP2108 land pattern for the 64-pin 9 mm x 9 mm QFN and confirm the exposed-pad connection before schematic release. Route the USB differential pair as a continuous, impedance-controlled path with symmetrical geometry and no unnecessary stubs. Numerical trace dimensions are not present in the supplied verified excerpts, so they must be taken from the manufacturer layout guidance and the actual board stack-up rather than estimated.
Place all required bypass and support components at the locations specified in the complete Silicon Labs data sheet, observing polarity and effective capacitance requirements. Keep loop area small and separate noisy RS-485 transceiver regions from USB and UART routing where practical. The supplied data does not provide supply-voltage limits, current consumption, or capacitor values, so those values must not be inferred; verify them from the official electrical-characteristics and reference-design sections.
Do not assume that a UART bridge includes RS-232 or RS-485 physical-layer transceivers, surge protection, galvanic isolation, or level translation. Those functions may require external components and should be validated against the legacy interface’s voltage levels. Also confirm that royalty-free host drivers support the intended operating-system version and that the EEPROM VID, PID, and descriptor configuration are assigned correctly for production deployment.
Información de cumplimiento
The supplied verified excerpts do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. No compliance claim has been inferred.
