RabbitCore RCM4300 Embedded Module (20-101-1139) Equivalent & Substitute Parts

Part Overview

The RabbitCore RCM4300 (20-101-1139) is an embedded module featuring a Rabbit 4000 processor operating at 58.98MHz with 1MB internal flash memory and 1MB RAM. This module is classified as obsolete and is no longer recommended for new designs. Finding equivalent or substitute parts is necessary for legacy system maintenance, field replacements, and ongoing support of existing deployments using this embedded platform.

Substiute Parts

20-101-1139

DigiIn Stock: 106820-101-1139 Datasheet

Current PartRFQ

20-101-1138

DigiIn Stock: 225920-101-1138 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The RabbitCore RCM4300 series allows substitution based on the following critical parameters that maintain functional compatibility:

• Processor Architecture: Rabbit 4000 core required
• Operating Frequency: 58.98MHz fixed specification
• Connector Configuration: IDC Header 2x25, 2x5, and microSD Card slot must match
• Physical Dimensions: 1.840" L x 2.850" W (47.00mm x 72.00mm) maintained
• Environmental Compliance: RoHS Compliant and MSL 1 rating preserved
• Memory Flexibility: Internal flash and RAM configurations may vary within the RCM4300 series while maintaining the same processor and connector interface

The substitute part 20-101-1138 maintains identical processor, frequency, connector type, dimensions, and compliance specifications while offering increased internal flash (2MB) and RAM (1.5MB) capacity.

Parameter Comparison

Engineering Selection Recommendations

The RabbitCore RCM4300 (20-101-1138) serves as a direct substitute for the obsolete 20-101-1139 model. Both parts maintain identical processor architecture, operating frequency, connector interface, physical dimensions, and environmental compliance specifications. The substitute part provides increased memory capacity (2MB flash and 1.5MB RAM versus 1MB each), which represents an enhancement without introducing incompatibility.

Selection between these parts should be based on application memory requirements. The 20-101-1138 is classified as "Not For New Designs," indicating it remains available for legacy system support and field replacements but is not recommended for new product development. Both parts carry RoHS Compliant certification and MSL 1 rating, ensuring equivalent environmental and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the 20-101-1138 directly replace the 20-101-1139 in existing applications?

A: Yes. Both modules share identical processor, frequency, connector configuration, and physical dimensions. The 20-101-1138 provides additional memory capacity, which is backward compatible with applications designed for the 1MB configuration.

Q: What is the primary difference between these two parts?

A: The main difference is memory capacity. The 20-101-1139 provides 1MB internal flash and 1MB RAM, while the 20-101-1138 provides 2MB internal flash and 1.5MB RAM. All other specifications remain identical.

Q: Are the connector pinouts identical between these modules?

A: Yes. Both modules use the same connector configuration: IDC Header 2x25, 2x5, and 1xmicroSD Card slot. Physical and electrical compatibility is maintained.

Q: What does "Obsolete" product status mean for the 20-101-1139?

A: Obsolete status indicates the part is no longer manufactured and is no longer recommended for new designs. The 20-101-1138 (Not For New Designs) remains available for legacy support and field replacements.

Q: Are both parts RoHS compliant?

A: Yes. Both the 20-101-1139 and 20-101-1138 are RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: Can I use the 20-101-1138 in a design originally specified for the 20-101-1139?

A: Yes. The increased memory in the 20-101-1138 does not introduce incompatibility. Applications designed for the 1MB configuration will function with the additional memory available.