CP2101-GM USB 2.0 to UART Bridge | Silicon Labs
料号： CP2101-GM ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $9.5004 | $9.50 |
| 10 | $7.43415 | $74.34 |
| 100 | $6.22991 | $622.99 |
| 500 | $5.91178 | $2,955.89 |
| 1,000 | $5.77834 | $5,778.34 |
CP2101-GM 概述
A USB-to-UART bridge, also called a USB serial interface adapter, converts between USB traffic and asynchronous serial data. It belongs to the interface-controller hierarchy and provides a bridge between a host computer and embedded equipment, industrial controllers, test systems, and legacy serial peripherals. The CP2101 family also includes full modem-control signals, allowing the integrated bridge to serve as a complete USB-to-serial interface rather than only a basic data adapter.
Verified distributor information identifies the CP2101-GM as a Silicon Labs USB bridge with a USB 2.0 UART interface in a 28-QFN package. The listed package is 5 mm by 5 mm, and the integrated USB 2.0 full-speed function controller operates without additional external USB components according to the manufacturer-linked Mouser datasheet source. The device is therefore suited to compact boards where a discrete USB transceiver and separate serial interface would increase component count and PCB area.
The CP2101 family is intended for updating RS-232 designs to USB with minimal components and PCB space. Typical engineering uses include programming and configuration ports, industrial equipment, instrumentation, data acquisition, and embedded control systems. The integrated oscillator and EEPROM are particularly useful when minimizing external support circuitry is a priority, while the asynchronous UART supports host-to-device serial communication through a standard bridge architecture.
The verified data confirms that the CP2101 is a mature product and is not recommended for new designs; the manufacturer-linked documentation identifies the CP2102 as a pin- and software-compatible alternative recommended for new designs. Existing CP2101-GM designs should therefore be evaluated for lifecycle, driver, and supply-chain considerations before committing to long-term production. A replacement must also be checked for exact footprint, electrical limits, firmware, and host-driver behavior rather than relying only on the USB-to-UART function label.
For layout, place the device and its supporting components close to the USB connector and keep high-speed USB traces short and continuous. USB differential routing, grounding, decoupling, and connector placement can materially affect signal integrity even though the CP2101 integrates the USB transceiver. The page consolidates verified distributor listings, official-linked documentation, alternative guidance, and design considerations into one procurement-oriented component record.
直接替换替代料： CP2101-GM ——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： CP2101-GM （相同外形与封装尺寸） ——差异在于 Package, RoHS Status, Supply Voltage, USB Interface, Serial Interface.
快速对比工具——选择替代料号进行并排对比：
CP2101-GM 规格参数
| Product Type | USB-to-UART bridge controller |
| USB Interface | USB 2.0 full-speed |
| Serial Interface | Asynchronous UART |
| 封装 | 28-QFN |
| Package Dimensions | 5 mm x 5 mm |
| External USB Components | None required |
| Integrated Functions | USB 2.0 full-speed function controller, USB transceiver, oscillator, EEPROM, UART |
| Modem Control | Full modem-control signals |
| Primary Use | Updating RS-232 designs to USB |
| Interface Category | USB bridge / USB-to-UART interface |
| Operating Supply | 3 V to 3.6 V |
| UART Protocol | Asynchronous serial data bus |
| Integration Level | Highly integrated single-chip bridge |
| External USB Transceiver | Not required |
| External Oscillator | Integrated on the CP2101 family per manufacturer-linked documentation |
| External EEPROM | Integrated on the CP2101 family per manufacturer-linked documentation |
| 安装类型 | Surface mount |
CP2101-GM 5 mm x 5 mm 引脚配置指南
CP2101-GM（5 mm x 5 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： CP2101-GM.
请参阅 数据手册 以查看完整引脚配置。
典型应用
CP2101-GM 适用于 6 应用s: RS-232-to-USB equipment interface, USB programming port, Industrial serial data acquisition, Test and measurement instrument connection, Embedded controller service interface, USB-to-serial adapter module.
RS-232-to-USB equipment interface
CP2101-GM fits legacy serial equipment that needs a compact USB connection. Its integrated USB 2.0 full-speed controller, transceiver, oscillator, EEPROM, UART, and modem-control signals reduce the support circuitry needed for an RS-232-style bridge. Place the bridge near the USB connector and preserve a controlled differential pair. The key trade-off is maturity: the supplied documentation describes the CP2101 as not recommended for new designs, so CP2102 is the preferred starting point for a fresh product.
推荐
USB programming port
CP2101-GM can provide a host-visible asynchronous serial port for programming embedded controllers, configuration tools, and service interfaces. Its single-chip integration means the USB side does not require a separate transceiver or oscillator, which is useful in compact programmer and debugger designs. Firmware and host-driver support must be verified for the target operating system, and the serial-level circuitry should match the equipment voltage and connector standard.
推荐
Industrial serial data acquisition
The CP2101-GM is suitable for connecting an industrial instrument or data-acquisition unit that originally exposes an asynchronous serial port. USB 2.0 full-speed operation and integrated modem-control signals support a compact bridge implementation, while the 5 mm by 5 mm QFN-28 package helps limit PCB area. For factory equipment, verify isolation requirements, surge protection, grounding, operating-temperature limits, and long-cable ESD strategy; the supplied data does not establish those detailed ratings.
推荐
Test and measurement instrument connection
CP2101-GM can bridge a USB host to serial-controlled test equipment, bench instruments, and laboratory peripherals that use an asynchronous UART. Integrating the USB controller and transceiver helps keep the adapter section compact while preserving modem-control capability for handshake-based protocols. Design the cable and grounding arrangement carefully, and confirm the instrument’s logic levels and connector pinout rather than assuming every serial port uses RS-232 voltage levels.
推荐
Embedded controller service interface
CP2101-GM is useful for adding a service, configuration, or diagnostic port to an embedded controller board. A single integrated bridge can replace a discrete USB-to-serial implementation, leaving more board area for the target MCU, power circuitry, and protection. Confirm whether the host software expects the CP2101 USB identifiers and driver behavior, and use the manufacturer datasheet to validate reset, suspend, and power-management implementation before release.
推荐
USB-to-serial adapter module
CP2101-GM can serve as the core of a compact USB-to-serial adapter module for legacy equipment, development boards, and field-service tools. Its integrated USB 2.0 full-speed function and transceiver reduce the component count for the USB side, while the UART and modem-control functions provide the serial connection. The board still needs connector mechanics, ESD protection, proper ground return, and validated driver or firmware support for a production module.
推荐
推荐产品汇总
工程参考数据： CP2101-GM ——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 | CP2102-GM |
|---|---|---|
| Package | 28-QFN, 5 mm x 5 mm | QFN-28; exact package dimensions not verified in supplied comparison data |
| Brand | Silicon Labs | Silicon Labs |
| Function | USB-to-UART bridge controller | USB-to-UART bridge; documented as pin- and software-compatible alternative |
| USB Speed | USB 2.0 full-speed | USB 2.0 full-speed |
| Serial Interface | Asynchronous UART | UART serial interface |
| Design Status | Mature product; not recommended for new designs | Recommended for new designs in supplied manufacturer-linked documentation |
关键差异点
- Highly integrated single-chip bridge （对比 CP2102-GM)
- No external USB components required （对比 CP2102-GM)
- Compact integrated package （对比 CP2102-GM)
- Mature-device status requires design review （对比 CP2102-GM)
设计说明
Keep the USB differential pair short, continuous, impedance-controlled, and free of unnecessary stubs. Place the CP2101-GM close to the USB connector, provide a continuous ground reference, and keep connector ESD protection close to the connector entry. The integrated USB transceiver reduces component count, but it does not remove the need to validate differential impedance, return paths, cable behavior, and host compliance in the finished board.
Follow the manufacturer QFN-28 land pattern and verify the exact pin numbering in the CP2101 datasheet before creating the PCB footprint. Pay particular attention to the exposed thermal pad, ground connection, solder-mask definition, and assembly clearances. Because the supplied data confirms a 28-QFN package but does not include the complete pin table, do not infer pin functions or pad dimensions from package name alone.
Do not treat every USB-to-UART IC as an RS-232 interface. USB and UART logic levels are not the same as RS-232 voltage levels, so verify whether the target equipment requires level translation, isolation, termination, or bias resistors. Also check host-driver compatibility, USB suspend and resume behavior, connector protection, cable length, and ground strategy before releasing a production design.
Use the supply range and decoupling requirements from the complete manufacturer datasheet rather than deriving them from the distributor snippets. Keep the CP2101-GM’s supply and ground connections short, place required bypass capacitors close to the device pins, and confirm the power source can support USB attachment and the target UART load. The supplied data confirms a 3 V to 3.6 V operating-supply description but does not provide all current or capacitor values.
合规信息
The supplied verified snippets do not establish RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than inferred. Check the current manufacturer regulatory and product documentation for the exact ordering code.
