CP2103-GM USB 2.0 to UART Bridge | Silicon Labs
MPN： CP2103-GM ✓ 啟用中CP2103-GM 概覽
A USB-to-UART bridge controller is a class of USB interface controller that translates USB host transactions into a conventional UART serial stream. In the product hierarchy, CP2103-GM belongs to the USB interface-controller and USB-to-UART bridge category, which sits within broader interface semiconductors and embedded connectivity solutions. Its value is especially relevant when a modern computer has no native RS-232 port but an instrument, industrial controller, service tool, or data-acquisition product still exposes a serial interface.
Available verified data identifies the CP2103-GM as a 28-QFN USB bridge with USB 2.0 and UART interfaces. Search results also describe an integrated USB transceiver, integrated clock, and an integrated 1024-byte EEPROM for identifiers and device information. These features can reduce the number of discrete USB-interface components required in a design. The integrated clock is especially useful because it eliminates the need for an external crystal in applications that do not require a different clocking arrangement.
The device is suitable for RS-232 and RS-485 modernization, USB-to-serial adapters, test equipment, programming interfaces, and embedded data links. RS-232 designs generally need appropriate line-level voltage handling, while RS-485 designs require a compatible transceiver and termination strategy; CP2103-GM alone is not a complete external RS-232 or RS-485 physical-layer solution. The host-side USB connection, UART signal integrity, voltage levels, grounding, and firmware support should therefore be validated together.
Designers should verify the exact pinout, electrical limits, clocking configuration, USB enumeration behavior, and supported operating voltage from the manufacturer datasheet before layout or firmware release. A compact QFN footprint helps reduce board area, but exposed-pad thermal management and careful USB differential-pair routing remain important. Firmware should also handle the device identifier and serial-number configuration appropriate to the intended production process.
This page combines verified distributor metadata, manufacturer-linked documentation references, and engineering guidance focused on USB-to-UART integration. It does not invent missing electrical limits, package dimensions, or alternative-device specifications; unavailable values are marked in the specification section for follow-up against the manufacturer datasheet.
直接替換替代品，適用於 CP2103-GM — 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： CP2103-GM （相同外形與佔位） — 差異在於 Package, Driver Support, Integrated USB Transceiver, Product Type, UART Channels.
CP2103-GMR
✅ 直接替換聯絡詢價
查看資料表 →CP2103
✅ 直接替換📋 參考替代品（不在目錄中）
CP2103-GM 規格
| Product Type | USB 2.0 to UART bridge controller |
| USB Interface | USB 2.0 |
| UART Interface | UART |
| Operating Voltage | 1.8 V to 3.6 V |
| 封裝 | 28-QFN |
| Package Dimensions | 5 mm × 5 mm |
| Exposed Pad | Yes |
| Integrated USB Transceiver | Yes |
| Integrated Clock | Yes |
| External Crystal Required | No external crystal required |
| Integrated EEPROM | 1024 bytes |
| EEPROM Functions | Vendor ID, product ID, serial number, power descriptor, and release number |
| RS-232/RS-485 Design Support | USB bridge solution for updating RS-232 and RS-485 designs |
| 安裝類型 | Surface mount |
| Interface Category | USB interface controller |
CP2103-GM 5 mm × 5 mm 腳位配置指南
CP2103-GM（5 mm × 5 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： CP2103-GM.
請參閱 資料表 以查看完整腳位配置。
典型應用
CP2103-GM 適用於 6 應用s: USB-to-RS-232 Serial Adapter, USB-to-RS-485 Industrial Bridge, Embedded Test and Measurement Interface, USB Programming and Configuration Port, Data-Acquisition Front Panel, Industrial Configuration and Service Interface.
USB-to-RS-232 Serial Adapter
CP2103-GM fits a compact USB-to-RS-232 adapter because it provides a USB 2.0-to-UART bridge with an integrated USB transceiver and integrated clock. The 28-QFN 5 mm × 5 mm package helps reduce board area, while the 1.8 V to 3.6 V operating range supports compatible low-voltage logic. The adapter still needs an appropriate RS-232 line driver/receiver, protection network, connector, and signal-ground arrangement. The main design consideration is ensuring that the UART logic levels, line-driver supply, and USB host enumeration behavior match the target serial equipment.
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USB-to-RS-485 Industrial Bridge
The CP2103-GM can provide the USB and UART side of an RS-485 converter while an external RS-485 transceiver supplies the physical layer. Its integrated clock removes the need for a separate crystal in the verified design description, and the integrated EEPROM can hold device identifiers and release information. The 1.8 V to 3.6 V supply range makes rail planning important when the chosen transceiver and protection devices require a different operating voltage. Designers must also validate bus biasing, termination, isolation, surge protection, grounding, and cable-length behavior.
推薦
Embedded Test and Measurement Interface
CP2103-GM is useful when an instrument or test fixture needs a modern USB connection while retaining a UART command interface. The bridge combines USB 2.0, UART, and an integrated clock in one controller, reducing the number of discrete USB-interface blocks. The 28-QFN package also supports compact front panels and portable test equipment. In a measurement product, the designer should keep the USB differential pair away from sensitive analog and high-current paths, provide local decoupling, and verify how reset, suspend, enumeration, and device descriptors affect the instrument’s power-up sequence.
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USB Programming and Configuration Port
A CP2103-GM-based programming port can connect a controller board to a USB host without exposing a legacy serial connector. The integrated USB transceiver and clock simplify the fixed-function bridge portion of the design, while the 1024-byte EEPROM can support vendor and product identification. The application requires a host driver or supported operating system, stable enumeration, and firmware that manages command framing, timeouts, and recovery. The 1.8 V to 3.6 V range should be checked against the target controller’s supply and logic-level requirements before selecting the board-level implementation.
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Data-Acquisition Front Panel
CP2103-GM can bridge a data-acquisition controller’s UART commands to a USB host, simplifying front-panel connectivity for benchtop or portable systems. The compact 28-QFN package leaves more board area for analog, protection, and power-supply circuitry, while the integrated clock and EEPROM reduce bridge overhead. USB signal integrity is especially important beside high-gain analog and switching nodes, so route the USB pair as a controlled-impedance differential pair and keep return-path discontinuities away from the interface. Firmware should define reliable command framing and recover cleanly from host reconnection.
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Industrial Configuration and Service Interface
The CP2103-GM is suitable for bringing a service port on industrial equipment onto USB so technicians can configure, log, or update a controller without a legacy connector. Its integrated clock and EEPROM support a compact bridge implementation, while the 1.8 V to 3.6 V supply range can support compatible 3.3 V systems. For industrial environments, add appropriate transient protection and consider isolation if ground potential differences are possible. Validate the production USB driver, serial-number programming process, reconnect behavior, and access-control requirements before deployment.
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推薦產品摘要
工程參考資料，適用於 CP2103-GM — 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 | CP2103-GMR | CP2103 |
|---|---|---|---|
| Package | 28-QFN, 5 mm × 5 mm | 28-QFN; exact footprint details require confirmation | 28-QFN listing; exact suffix details require confirmation |
| Brand | Silicon Labs | Silicon Labs | Silicon Labs |
| Product Type | USB 2.0 to UART bridge controller | USB-to-UART bridge listing | CP2103 USB-to-UART family listing |
主要差異化特點
- Integrated clock reduces external timing-component count (對比CP2103-GMR)
- Compact 28-QFN implementation (對比CP2103)
- Integrated configuration memory (對比CP2103-GMR)
設計說明
Route the USB differential pair as a short, continuous pair with a controlled impedance and an uninterrupted reference plane. Keep the pair away from switching nodes, high-current return paths, and sensitive analog inputs. Place the CP2103-GM power bypass capacitors close to the device’s supply and ground pins, and follow the manufacturer’s land pattern and exposed-pad recommendation rather than substituting a generic QFN footprint.
Do not connect an RS-232 or RS-485 peripheral directly to the UART pins without the required line-level circuitry. For RS-232, add a suitable transceiver such as a MAX3232-family device; for RS-485, add a half-duplex transceiver and review biasing, termination, protection, and ground strategy. The CP2103-GM handles the USB-to-UART bridge function, not the full external serial physical layer.
The verified operating range is 1.8 V to 3.6 V. Check every connected transceiver, connector, level shifter, and USB power requirement against the selected rail, especially in designs that combine CP2103-GM with legacy RS-232 devices. Confirm whether the system bus-powered target supports the available current and whether a self-powered USB configuration changes the power-budget assumptions. The supplied data does not establish the exact USB current limit, so obtain that value from the manufacturer datasheet before finalizing the supply design.
合規資訊
The supplied CP2103-GM search results do not provide verified compliance values. Compliance claims must be confirmed from the current manufacturer documentation or authorized distributor records.
