CP2102N-A01-GQFN20 USB 2.0 UART Bridge | Silicon Labs
料号： CP2102N-A01-GQFN20 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
CP2102N-A01-GQFN20 概述
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.
直接替换替代料： CP2102N-A01-GQFN20 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： CP2102N-A01-GQFN20 （相同外形与封装尺寸） ——差异在于 Package.
快速对比工具——选择替代料号进行并排对比：
CP2102N-A01-GQFN20R
✅ 直接替换📋 参考替代料（不在目录中）
CP2102N-A01-GQFN20 规格参数
| 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 |
| 封装 | 20-QFN, 3 mm x 3 mm |
| 安装类型 | 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 引脚配置指南
CP2102N-A01-GQFN20（20-qfn, 3 mm x 3 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： CP2102N-A01-GQFN20.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CP2102N-A01-GQFN20 适用于 6 应用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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
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.
推荐
推荐产品汇总
工程参考数据： CP2102N-A01-GQFN20 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | 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 |
关键差异点
- Integrated USB interface functions （对比 CP2102N-A01-GQFN20R)
- Low external-component implementation （对比 CP2102N-A01-GQFN20R)
- Configurable descriptor storage （对比 CP2102N-A01-GQFN20R)
- Compact board-area advantage （对比 CP2102N-A01-GQFN20R)
设计说明
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.
合规信息
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.
