CP2102N-A01-GQFN20 USB 2.0 UART Bridge | Silicon Labs
MPN： CP2102N-A01-GQFN20 ✓ 啟用中CP2102N-A01-GQFN20 概覽
A USB-to-UART bridge is an interface controller that converts between USB connectivity and asynchronous serial data. It belongs to the broader hierarchy of interface ICs, USB controllers, USB interface bridges, and data-conversion semiconductors. This device is intended to simplify RS-232-to-USB modernization, firmware-free USB enumeration, and embedded serial connectivity by integrating the required USB and UART functions in one compact component.
The CP2102N-A01-GQFN20 combines a USB 2.0 full-speed function controller, USB transceiver, integrated clock, UART, programmable vendor and product identification, serial-number support, and four digital I/O pins. According to the manufacturer data sheet, no external USB components are required for development, and an internal 960-byte programmable ROM stores device identification and descriptor information. The compact package helps reduce board area in space-constrained USB-to-serial designs.
The integrated clock removes the need for an external crystal in the referenced USB design application, while the integrated transceiver supports direct USB connectivity. The four digital I/O pins provide additional control or status functions beyond the primary USB and UART interfaces. This integration is valuable when a design needs a small USB-to-UART bridge without implementing USB protocol firmware.
Typical applications include industrial control equipment, test and measurement instruments, data loggers, configuration interfaces, serial adapters, embedded development boards, and legacy RS-232 systems converted to USB. The 3 mm by 3 mm package is particularly useful where connector placement and board area are constrained.
When designing a board, route USB differential pairs as a controlled-impedance pair and keep the connector, protection components, and transceiver path physically compact. Confirm the exact package pinout and exposed-pad connection in the Silicon Labs data sheet before layout release. Commercial pricing and availability should be checked against distributor records as of 2026-10-22.
This page consolidates manufacturer specifications, verified distributor references, cross-reference findings, and practical design considerations for engineers evaluating the CP2102N-A01-GQFN20 USB-to-UART bridge.
直接替換替代品，適用於 CP2102N-A01-GQFN20 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： CP2102N-A01-GQFN20 （相同外形與佔位） — 差異在於 Package.
CP2102N-A01-GQFN20R
✅ 直接替換聯絡詢價
查看資料表 →CP2102N-A01-GQFN20 規格
| Product Type | USB 2.0 full-speed USB-to-UART bridge controller |
| USB Interface | USB 2.0 full-speed |
| UART Interface | Universal Asynchronous Receiver/Transmitter |
| Supply Voltage Range | 3 V to 3.6 V |
| Integrated Regulator Output | 3.3 V |
| Digital I/O Pins | 4 |
| 封裝 | 20-QFN, 3 mm x 3 mm |
| 安裝類型 | Surface mount |
| Programmable ROM | 960 bytes |
| Internal Functions | USB function controller, USB transceiver, oscillator, and UART |
| External USB Components | None required for development |
| External Crystal | No external crystal required |
| Power-on Reset | On-chip power-on reset circuit |
| Programmable Identification | Vendor ID, product ID, serial number, power descriptor, release number, and product description strings |
CP2102N-A01-GQFN20 20-qfn, 3 mm x 3 mm 腳位配置指南
CP2102N-A01-GQFN20（20-qfn, 3 mm x 3 mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： CP2102N-A01-GQFN20.
請參閱 資料表 以查看完整腳位配置。
典型應用
CP2102N-A01-GQFN20 適用於 6 應用s: Industrial Control and Data Acquisition, Test and Measurement Instrument Connectivity, Legacy RS-232 Equipment Modernization, Embedded Development and Configuration Port, USB-to-Serial Data Logger, Network and Communications Equipment.
Industrial Control and Data Acquisition
The CP2102N-A01-GQFN20 fits industrial control and data-acquisition products that expose a USB connection to a host while using an internal UART for a controller, sensor, or peripheral. Its USB 2.0 full-speed function controller, integrated USB transceiver, and integrated oscillator reduce the number of external interface components. The compact 3 mm x 3 mm QFN20 package is useful when the connector and controller must fit on a small board. Designers should route USB as a controlled-impedance pair, provide the manufacturer-recommended power network, and use UART protection appropriate to the connected equipment.
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Test and Measurement Instrument Connectivity
The CP2102N-A01-GQFN20 is suitable for test and measurement instruments that need a reliable USB-to-UART service or control port. The integrated oscillator removes the need for a separate crystal in the referenced design approach, while the integrated transceiver simplifies the USB device implementation. Four digital I/O pins can provide auxiliary control or status signaling beyond the serial channel. In a compact instrument, the 20-QFN package helps preserve board space around connectors and analog sections. Confirm the exact UART baud-rate support, electrical levels, and pin functions in the manufacturer data sheet before finalizing the interface.
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Legacy RS-232 Equipment Modernization
The CP2102N-A01-GQFN20 can provide the USB-side controller for a legacy RS-232 equipment upgrade, allowing a modern computer to communicate through UART without implementing USB protocol firmware. The device integrates USB 2.0 full-speed control, USB transceiver, oscillator, and UART functions. This is particularly useful where an instrument already has a UART interface and only needs a modern host connection added. The exact logic levels, reset behavior, flow-control arrangement, and connector protection must be designed around the manufacturer data sheet, especially if the legacy equipment uses non-3.3 V signaling.
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Embedded Development and Configuration Port
The CP2102N-A01-GQFN20 is appropriate for embedded development boards and configuration ports because it provides a USB-to-UART bridge without requiring a separate USB transceiver, crystal, or application firmware for basic USB enumeration. The integrated 960-byte programmable ROM supports customization of vendor and product descriptors, while four digital I/O pins can expose board-level control or status functions. Its small package is helpful in compact embedded systems, although the QFN20 footprint requires careful land-pattern and exposed-pad design. Firmware support for the host driver and the correct USB descriptor configuration should be validated during production design.
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USB-to-Serial Data Logger
The CP2102N-A01-GQFN20 can serve as the USB interface in a compact data logger that receives serial data from a sensor, controller, or embedded module and presents it to a host computer. USB 2.0 full-speed operation and the integrated UART reduce the interface complexity, while the four digital I/O pins can support logging-state indicators or control signals. The small 3 mm x 3 mm QFN20 package leaves board area for storage, sensing, and power circuitry. In a battery- or field-powered product, verify current consumption, suspend behavior, ESD protection, and the complete power configuration against the manufacturer documentation.
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Network and Communications Equipment
The CP2102N-A01-GQFN20 is useful in communications equipment that needs a local USB management or diagnostic port rather than a high-speed USB data path. The device’s full-speed USB interface and UART can bridge a host connection to a controller, module, or service processor, while the integrated clock and transceiver reduce external component count. A three-dimensional QFN20 footprint supports compact board designs, but USB signal integrity remains essential. Keep the D+ and D+ pair routed over a continuous reference plane, observe USB impedance guidance, and separate noisy power or high-current paths according to the manufacturer’s layout recommendations.
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推薦產品摘要
工程參考資料，適用於 CP2102N-A01-GQFN20 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | CP2102N-A01-GQFN20R |
|---|---|---|
| Package | 20-QFN, 3 mm x 3 mm | 20-QFN, 3 mm x 3 mm - same listed package |
| Brand | Silicon Labs | Silicon Labs |
主要差異化特點
- Integrated USB interface functions (對比CP2102N-A01-GQFN20R)
- Low external-component implementation (對比CP2102N-A01-GQFN20R)
- Configurable descriptor storage (對比CP2102N-A01-GQFN20R)
- Compact board-area advantage (對比CP2102N-A01-GQFN20R)
設計說明
Route the USB D+ and D- conductors as a short, coupled, continuous-impedance pair on the same board layer where practical. Keep the path from the USB connector through protection components to the CP2102N-A01-GQFN20 as short as possible, avoid stubs, and provide a continuous ground reference. The 3 mm x 3 mm QFN20 footprint leaves little room for excess routing, so USB geometry should be resolved before the surrounding circuitry is placed.
Use the manufacturer-recommended power configuration and decoupling arrangement for the CP2102N-A01-GQFN20. The device is specified from 3 V to 3.6 V and includes a 3.3 V regulator output in the referenced bus-powered design, but external capacitor selection, USB bus-powered behavior, and system-level voltage choices must follow the official data sheet. Avoid placing noisy switching paths directly beneath the USB interface or supply pins.
Treat the exposed pad and package thermal requirements as part of the footprint, not as optional copper. Confirm whether the manufacturer specifies a thermal-pad connection, via pattern, or solder-mask condition for the CP2102N-A01-GQFN20. Verify the 20-QFN land pattern against the package drawing and preserve clearances around the USB connector and protection network.
Do not treat the related CP2102N-A01-GQFN20R listing as an automatic substitute without checking the current ordering information and pin compatibility. The verified cross-reference search identifies it as related, but it does not quantify every electrical difference or provide a complete manufacturer drop-in statement. Also validate host-driver support, USB descriptors, UART levels, reset behavior, and UART baud-rate requirements before releasing production firmware.
合規資訊
The supplied verified snippets do not provide definitive RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Consult the current Silicon Labs product documentation and supplier declarations before making a compliance claim.
