CP2103-GM USB to UART Bridge Controller

Part Overview

The CP2103-GM is a USB Bridge controller manufactured by Silicon Labs that provides USB to UART interface functionality. This device integrates USB 2.0 protocol support with UART communication, enabling serial communication over USB connections. The part is classified as "Not For New Designs," indicating it has been superseded in Silicon Labs' product roadmap. Finding equivalent or substitute parts is necessary for applications requiring continued supply, design flexibility, or alternative sourcing options while maintaining functional compatibility.

Substiute Parts

CP2103-GM

Silicon LabsIn Stock: 8736CP2103-GM Datasheet

Current PartRFQ

CP2102-GM

Silicon LabsIn Stock: 1487CP2102-GM Datasheet

Parametric EquivalentRFQ

XR21B1420IL28-F

MaxLinear, Inc.In Stock: 1293XR21B1420IL28-F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CP2103-GM are identified based on strict parameter alignment in the following categories:

Critical Matching Parameters:

• Function: Bridge, USB to UART
• Protocol: USB
• Interface: UART
• Standards: USB 2.0
• Package / Case: 28-VFQFN Exposed Pad
• Supplier Device Package: 28-QFN (5x5)
• Operating Temperature Range: -40°C ~ 85°C

Allowable Variation Parameters:

• Voltage - Supply: Must support minimum 3V operation
• Current - Supply: Variation acceptable within design margins
• Moisture Sensitivity Level: Higher MSL values acceptable for controlled environments
• Product Status: Active status preferred for new applications

The CP2102-GM qualifies as a parametric equivalent, sharing identical electrical specifications and package configuration with the CP2103-GM. The XR21B1420IL28-F qualifies as a similar substitute, maintaining core USB-to-UART bridge functionality with compatible packaging but featuring extended voltage supply range and different product lifecycle status.

Parameter Comparison

Engineering Selection Recommendations

CP2102-GM (Silicon Labs): This part is a direct parametric equivalent to the CP2103-GM, offering identical electrical specifications, package configuration, and compliance certifications. Both parts share "Not For New Designs" status, indicating they are in the same product lifecycle phase. Selection between CP2103-GM and CP2102-GM depends on inventory availability and existing design documentation rather than technical differentiation.

XR21B1420IL28-F (MaxLinear, Inc.): This part provides functional substitution with extended voltage supply range (3V ~ 5.25V) and lower supply current (15mA). The XR21B1420IL28-F maintains identical package geometry and operating temperature range. This part carries "Active" product status, making it suitable for new designs requiring long-term supply assurance. The higher Moisture Sensitivity Level (MSL 2) requires controlled storage conditions compared to the CP2103-GM (MSL 1). All three parts maintain ROHS3 compliance and identical USB 2.0 standards support.

Frequently Asked Questions (FAQ)

Q: Can CP2102-GM be used as a direct replacement for CP2103-GM? A: Yes. The CP2102-GM and CP2103-GM share identical electrical parameters, package configuration (28-QFN 5x5), voltage supply range (3V ~ 3.6V), current consumption (20mA), and operating temperature range (-40°C ~ 85°C). Both are ROHS3 compliant with MSL 1 rating. Substitution requires no design modifications.

Q: What are the key differences between CP2103-GM and XR21B1420IL28-F? A: The primary differences are manufacturer (Silicon Labs vs. MaxLinear), product status (Not For New Designs vs. Active), voltage supply range (3V ~ 3.6V vs. 3V ~ 5.25V), supply current (20mA vs. 15mA), and moisture sensitivity level (MSL 1 vs. MSL 2). All other parameters including package, interface standards, and operating temperature are identical.

Q: Is the XR21B1420IL28-F suitable for designs currently using CP2103-GM? A: The XR21B1420IL28-F provides functional compatibility with identical package geometry and USB 2.0 UART bridge functionality. The extended voltage supply range (up to 5.25V) offers design flexibility. However, the higher MSL rating (2 vs. 1) requires appropriate moisture control during storage and handling. No PCB layout modifications are required due to identical 28-QFN (5x5) packaging.

Q: Why is CP2103-GM marked "Not For New Designs"? A: This designation indicates the part has been superseded in the manufacturer's product roadmap. Existing designs may continue using this part, but new designs should consider alternatives such as CP2102-GM or XR21B1420IL28-F for improved long-term supply availability.

Q: Are all three parts ROHS3 compliant? A: Yes. CP2103-GM, CP2102-GM, and XR21B1420IL28-F are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of MSL rating differences? A: Moisture Sensitivity Level (MSL) indicates the maximum time a component can be exposed to ambient conditions before soldering. CP2103-GM and CP2102-GM have MSL 1 (unlimited exposure time). XR21B1420IL28-F has MSL 2 (1 year maximum). Higher MSL ratings require controlled storage environments and shorter shelf life management.