CP2102N-A01-GQFN24 USB-to-UART Bridge | Silicon Labs
MPN： CP2102N-A01-GQFN24 ✗ 停產CP2102N-A01-GQFN24 概覽
A USB-to-UART bridge is an interface IC that connects a USB host to a serial UART peripheral while handling USB packetization, enumeration, control transfers, and serial data transmission. This device is useful when an existing embedded design needs a compact USB-to-serial path for firmware updates, configuration, diagnostics, logging, or manufacturing test. Its position in the hierarchy is USB interface bridge, then USB-to-UART interface IC, then broader interface IC and semiconductor.
The verified ordering information identifies four GPIOs, separate VDD and VIO pins, and a -40 °C to +85 °C temperature range. The package is QFN24, and the product is specified for a 3 V to 3.6 V supply according to the available distributor and datasheet data. The separate VDD and VIO arrangement allows the USB and UART sides to use independently selected supply domains when the host circuit requires voltage-domain flexibility. The four GPIOs add simple control or status functions beyond basic UART communication.
Typical uses include industrial control equipment, USB-to-RS-232 design updates, serial adapters, embedded development boards, programmable controllers, and factory test equipment. Because the CP2102N integrates the USB function controller, transceiver, oscillator, and UART, the circuit can be designed with fewer external USB components than a discrete USB implementation. The manufacturer datasheet should be consulted for the exact pin names, exposed-pad connection, capacitor values, voltage sequencing, and USB routing requirements.
For PCB implementation, place the device close to the USB connector and maintain short, controlled-impedance USB differential traces. Decouple each applicable supply domain near its pins and follow the datasheet’s recommended footprint and exposed-pad thermal design. Confirm host-driver support, UART voltage levels, cable orientation, and regulatory requirements before releasing a production design.
This page combines the verified manufacturer and distributor data with same-package replacement research, application guidance, comparison parameters, and practical implementation notes. It does not infer undocumented specifications or treat functionally similar bridges as pin-compatible replacements.
直接替換替代品，適用於 CP2102N-A01-GQFN24 — 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-GQFN24 （相同外形與佔位） — 差異在於 Product Type, RoHS Status.
CP2102N-A02-GQFN24
✅ 直接替換聯絡詢價
查看資料表 →CP2102N-A01-GQFN24R
✅ 直接替換聯絡詢價
查看資料表 →CP2102N-A02-GQFN24R
✅ 直接替換聯絡詢價
查看資料表 →CP2102N-A01-GQFN24 規格
| Product Type | USB 2.0 full-speed to UART interface bridge |
| Product Family | USBXpress |
| USB Standard | USB 2.0 full-speed |
| 供應電壓 | 3 V to 3.6 V |
| 介面 | USB-to-UART |
| General-Purpose I/O Count | 4 GPIOs |
| Power Supply Arrangement | Separate VDD and VIO pins |
| 工作溫度 | -40 °C to +85 °C |
| Package Type | QFN24 |
| Package Dimensions | 4 mm x 4 mm |
| Integrated Functions | USB function controller, USB transceiver, oscillator, and UART |
| External USB Components | No other external USB components required, according to the verified source |
| 安裝類型 | Surface mount |
| RoHS 狀態 | Pb-free and RoHS compliant, according to the verified ordering table |
| Lead-Free Status | Yes, according to the verified ordering table |
CP2102N-A01-GQFN24 4 mm x 4 mm 腳位配置指南
CP2102N-A01-GQFN24（4 mm x 4 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-GQFN24.
請參閱 資料表 以查看完整腳位配置。
典型應用
CP2102N-A01-GQFN24 適用於 6 應用s: USB-to-UART Embedded Controller, Industrial USB-to-RS-232 Upgrade, Programmable Logic and Test Equipment, USB Serial Adapter for Accessory Devices, Data Logging and Diagnostics Interface, Development Board and Prototype Interface.
USB-to-UART Embedded Controller
CP2102N-A01-GQFN24 fits embedded controllers that need a compact USB path for firmware download, configuration, diagnostics, and runtime logging. Its integrated USB 2.0 full-speed controller, transceiver, oscillator, and UART reduce the number of external USB interface components, while four GPIOs provide basic status or control functions. The 3 V to 3.6 V supply range and QFN24 4 mm by 4 mm package support dense controller layouts. Designers should match VDD and VIO to the system rails, place decoupling capacitors near the device, and route the USB differential pair away from noisy UART and switching-regulator paths.
推薦
Industrial USB-to-RS-232 Upgrade
The CP2102N-A01-GQFN24 is suitable for modernizing legacy RS-232 equipment by placing a USB interface beside an existing UART-based controller. It provides USB 2.0 full-speed connectivity and a UART interface in one compact package, helping designers retain an established serial protocol while replacing the legacy host port. The four GPIOs can support ancillary control signals where the system permits. A production design must add the appropriate RS-232 line driver or receiver, cable protection, grounding, and isolation as required by the application. The official datasheet should control USB and supply layout.
推薦
Programmable Logic and Test Equipment
CP2102N-A01-GQFN24 can provide a USB service port for programmable logic, instrumentation, and factory-test products. The host can use UART commands to configure registers, retrieve measurements, load test vectors, or collect production data without exposing a proprietary connector. The integrated USB-to-UART bridge reduces firmware complexity on the USB host side, while the four GPIOs support auxiliary handshake or status signaling. For test equipment, isolate the USB connector and UART interface from high-energy circuits, use controlled-impedance routing, and verify ground and shield behavior according to the enclosure and EMC requirements.
推薦
USB Serial Adapter for Accessory Devices
The CP2102N-A01-GQFN24 is appropriate for a compact USB serial adapter that connects an accessory or control board to a computer. Its QFN24 4 mm by 4 mm package helps reduce board area, and its separate VDD and VIO pins provide flexibility when the accessory UART operates from a different voltage domain. The design must include the USB connector, required passive components, firmware or host-driver support, and the correct UART logic-level interface. Designers should verify whether the target operating system already supports the required CP210x driver or whether a custom driver is necessary.
推薦
Data Logging and Diagnostics Interface
CP2102N-A01-GQFN24 can add a low-component-count USB diagnostics channel to equipment that records operating data or accepts service commands. A host computer can receive serial logs, request calibration values, or trigger maintenance operations through the UART link. The integrated USB function controller and transceiver avoid a separate USB controller implementation, while the four GPIOs can indicate status or assist with flow control. Place the bridge near the USB connector, keep the differential pair continuous, and isolate noisy motor, relay, or power-converter switching nodes from the communication area.
推薦
Development Board and Prototype Interface
The CP2102N-A01-GQFN24 is useful on development boards that need a compact USB console for a microcontroller or programmable device. It lets engineers program, bootload, monitor serial output, and run interactive diagnostics from a standard USB cable. The 24-QFN package is small, but its fine pitch requires careful assembly and land-pattern review. Developers should confirm the USB host driver, UART baud-rate configuration, GPIO use, and supply domains before populating the part. The verified manufacturer documentation and application notes provide the appropriate starting point for the final reference circuit.
推薦
推薦產品摘要
工程參考資料，適用於 CP2102N-A01-GQFN24 — 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-A02-GQFN24 | CP2102N-A01-GQFN24R | CP2102N-A02-GQFN24R | FT232RL |
|---|---|---|---|---|---|
| Brand | Silicon Labs | Silicon Labs | Silicon Labs | Silicon Labs | FTDI |
| Package | QFN24 | QFN24 | QFN24 | QFN24 | QFN32 |
主要差異化特點
- Same-package revision path (對比CP2102N-A02-GQFN24)
- Integrated USB bridge (對比FT232RL)
- Separate VDD and VIO architecture (對比Generic USB-UART bridge)
設計說明
Place the CP2102N-A01-GQFN24 close to the USB connector and route the USB differential pair as a short, continuous, impedance-controlled pair. Keep the pair away from switching nodes, high-current return paths, and unshielded UART edges. Use the manufacturer’s recommended footprint and verify the exposed-pad treatment in the official package drawing. The supplied data does not provide a complete reference layout, so do not release a footprint solely from the generic QFN24 name.
Decouple the VDD and VIO supply domains separately according to the manufacturer application guidance. The verified ordering information confirms separate VDD and VIO pins, but it does not provide every recommended capacitor value or rail-sequencing limit. Check the current datasheet before placing decoupling parts and before connecting an externally powered UART interface. Ensure the USB-side and UART-side voltage domains remain within their specified operating limits.
Do not assume that a functionally similar USB-UART bridge is pin-compatible. The verified cross-reference results identify CP2102N-A02-GQFN24 as the relevant successor, while FT232RL and other alternatives may use different packages or pinouts. Compare the exact pin table, exposed pad, UART voltage levels, firmware behavior, and USB power requirements before replacing the target. Also confirm that the host operating system has the required CP210x driver.
Keep the USB connector, protection network, and bridge in the same controlled USB channel region. Separate the UART traces from sensitive analog or high-speed switching paths where possible, and use a solid ground reference. If the board includes a metal enclosure or chassis, define the chassis-to-digital-ground connection according to EMC and ESD requirements. The verified data confirms an integrated USB transceiver but does not specify the final protection component selection.
合規資訊
The verified ordering table identifies CP2102N-A01-GQFN24 as Pb-free and RoHS compliant. REACH, AEC-Q100, halogen-free, and conflict-minerals status were not explicitly established in the supplied data.
