TRM-868-DP1203 Equivalent & Substitute Parts

Part Overview

The TRM-868-DP1203 is a General ISM < 1GHz Transceiver Module manufactured by TE Connectivity Linx, operating at 868MHz with FSK modulation. This surface mount module integrates the XE1203F IC and provides SPI serial interface connectivity for wireless communication applications. The product is currently classified as Obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

TRM-868-DP1203

TE Connectivity LinxIn Stock: 1006TRM-868-DP1203 Datasheet

Current PartRFQ

RC1180-MBUS3

Radiocrafts ASIn Stock: 4173RC1180-MBUS3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TRM-868-DP1203 is determined by the following critical parameters:

Mandatory Matching Criteria:

• RF Family/Standard: General ISM < 1GHz
• Frequency: 868MHz
• Modulation: FSK
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C ~ 85°C

Functional Compatibility Criteria:

• Supply Voltage overlap within specified ranges
• Output power level sufficient for application requirements
• Receiver sensitivity adequate for link budget calculations
• Serial interface compatibility with system architecture

The RC1180-MBUS3 qualifies as a substitute based on alignment with mandatory criteria. However, differences in serial interface type (UART vs. SPI), data rate capability, and protocol implementation require engineering evaluation for specific applications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Substitution Consideration:

The RC1180-MBUS3 is suitable as a substitute when the following conditions are met:

1. System Interface Compatibility: The application architecture must accommodate UART serial interface in place of SPI, or an interface adapter must be implemented.

2. Data Rate Requirements: Applications requiring data rates above 100Kbps may experience limitations with the RC1180-MBUS3. The TRM-868-DP1203 supports 152.3kbps, providing higher throughput capability.

3. Link Budget Analysis: The 5dB sensitivity difference (-111dBm vs. -106dBm) and 1dB output power difference (11dBm vs. 10dBm) result in a 6dB net link budget reduction. This must be evaluated against system range and reliability requirements.

4. Power Consumption: The RC1180-MBUS3 draws 24mA in receive mode compared to 14mA for the TRM-868-DP1203, representing a 71% increase in receive current consumption.

5. Product Status and Support: The RC1180-MBUS3 is Active status with ongoing manufacturer support, whereas the TRM-868-DP1203 is Obsolete. Long-term availability and technical support favor the RC1180-MBUS3 for new designs.

6. Compliance: Both modules meet RoHS and REACH requirements. The RC1180-MBUS3 achieves ROHS3 compliance, representing current regulatory alignment.

Frequently Asked Questions (FAQ)

Q: Can the RC1180-MBUS3 directly replace the TRM-868-DP1203 without PCB modifications?

A: Direct replacement depends on serial interface implementation. If the host system uses SPI exclusively, interface conversion circuitry or firmware modification is required. If the host system supports UART, mechanical and electrical compatibility is achievable with proper antenna configuration for the RC1180-MBUS3.

Q: What is the impact of the 5dB sensitivity difference on system performance?

A: The TRM-868-DP1203 provides superior receiver sensitivity at -111dBm versus -106dBm for the RC1180-MBUS3. In applications with marginal link budgets or extended range requirements, this 5dB difference translates to approximately 1.8x reduction in maximum communication distance for the RC1180-MBUS3.

Q: Are there antenna considerations when substituting these modules?

A: The TRM-868-DP1203 uses castellation antenna integration. The RC1180-MBUS3 also features castellation but requires antenna not included in the module. Antenna selection and impedance matching must be verified for the RC1180-MBUS3 implementation.

Q: What are the power supply voltage compatibility requirements?

A: Both modules operate within overlapping voltage ranges. The TRM-868-DP1203 requires 2.4V to 3.6V, while the RC1180-MBUS3 operates from 2V to 3.6V. Systems designed for the TRM-868-DP1203 minimum of 2.4V are compatible with the RC1180-MBUS3.

Q: How does the data rate difference affect application compatibility?

A: The TRM-868-DP1203 supports 152.3kbps while the RC1180-MBUS3 operates at 100Kbps. Applications requiring higher throughput must evaluate whether the 33% reduction in data rate is acceptable for system requirements.

Q: What is the significance of the Wireless M-Bus protocol in the RC1180-MBUS3?

A: The RC1180-MBUS3 is optimized for Wireless M-Bus protocol implementation. The TRM-868-DP1203 operates as a general ISM module without protocol specification. Protocol compatibility must be verified if the application requires Wireless M-Bus compliance.