XT09-SI-MESH Equivalent & Substitute Parts

Part Overview

The XT09-SI-MESH is a General ISM < 1GHz transceiver module manufactured by Digi as part of the XTend® series. This chassis mount RF module operates at 900MHz with FHSS and FSK modulation, delivering 225kbps data rate and 30dBm output power. The module features RP-SMA antenna connectivity and UART serial interface for system integration.

The XT09-SI-MESH is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system continuity, ensure supply chain reliability, and support legacy system maintenance where direct replacement or functional equivalents are required.

Substiute Parts

XT09-SI-MESH

DigiIn Stock: 905XT09-SI-MESH Datasheet

Current PartRFQ

XTP9B-DMS-001

DigiIn Stock: 1071XTP9B-DMS-001 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The XTP9B-DMS-001 qualifies as a substitute for the XT09-SI-MESH based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Manufacturer: Digi (same manufacturer, XTend® series continuity)
• RF Family/Standard: General ISM < 1GHz (identical frequency band classification)
• Power - Output: 30dBm (identical output power)
• Sensitivity: -110dBm (identical receiver sensitivity)
• Voltage - Supply: 2.8V ~ 5.5V (identical supply voltage range)
• Serial Interfaces: UART (identical communication interface)
• Antenna Type: Antenna Not Included, RP-SMA (identical connector type)
• Operating Temperature: -40°C ~ 85°C (identical temperature range)
• Package / Case: Module (same form factor classification)
• Moisture Sensitivity Level (MSL): 1 (Unlimited) (identical moisture rating)

Differences:

• Frequency: 902MHz ~ 928MHz (XTP9B-DMS-001) vs. 900MHz (XT09-SI-MESH) — within ISM band compatibility
• Modulation: FSK (XTP9B-DMS-001) vs. FHSS, FSK (XT09-SI-MESH) — FSK subset compatibility
• Data Rate: 125kbps (XTP9B-DMS-001) vs. 225kbps (XT09-SI-MESH) — lower throughput
• Current - Receiving: 35mA (XTP9B-DMS-001) vs. 80mA (XT09-SI-MESH) — improved efficiency
• Current - Transmitting: 710mA (XTP9B-DMS-001) vs. 90mA ~ 730mA (XT09-SI-MESH) — within range
• Mounting Type: Surface Mount (XTP9B-DMS-001) vs. Chassis Mount (XT09-SI-MESH) — different PCB integration method
• Product Status: Active (XTP9B-DMS-001) vs. Obsolete (XT09-SI-MESH) — ongoing availability

Parameter Comparison

Engineering Selection Recommendations

The XTP9B-DMS-001 is the designated substitute for the obsolete XT09-SI-MESH. Selection of this substitute is supported by the following engineering criteria:

Product Status & Availability: The XTP9B-DMS-001 maintains active production status with confirmed inventory availability (961 Pcs New Original In Stock), ensuring reliable supply chain access compared to the obsolete XT09-SI-MESH.

Electrical Compatibility: Both modules operate within identical supply voltage ranges (2.8V ~ 5.5V), output power (30dBm), and receiver sensitivity (-110dBm). UART serial interface compatibility ensures direct integration with existing host systems without firmware modification.

Frequency Band & Modulation: The XTP9B-DMS-001 operates within the overlapping ISM frequency band (902MHz ~ 928MHz) with FSK modulation support. While the original XT09-SI-MESH supports both FHSS and FSK, the substitute's FSK capability maintains core modulation compatibility for most ISM applications.

Regulatory & Compliance: Both modules share identical REACH status (REACH Unaffected), ECCN classification (5A992C), and HTSUS codes (8517.62.0090), confirming equivalent regulatory standing. The XTP9B-DMS-001 is RoHS Compliant, providing enhanced environmental compliance.

Mechanical Integration: The primary design consideration is the mounting type difference. The XT09-SI-MESH uses chassis mount configuration, while the XTP9B-DMS-001 uses surface mount. PCB layout redesign is required to accommodate this transition. Both modules maintain identical RP-SMA antenna connector type, eliminating antenna compatibility concerns.

Power Consumption: The XTP9B-DMS-001 demonstrates improved power efficiency in receive mode (35mA vs. 80mA), reducing overall system power budget requirements.

Frequently Asked Questions (FAQ)

Q: Can the XTP9B-DMS-001 directly replace the XT09-SI-MESH without PCB modifications?

A: No. The primary constraint is the mounting type difference. The XT09-SI-MESH is chassis mount, while the XTP9B-DMS-001 is surface mount. PCB layout redesign is required to accommodate the different mounting footprint. All electrical interfaces (UART, power supply, antenna connector) are compatible.

Q: What is the frequency band difference between these modules?

A: The XT09-SI-MESH operates at 900MHz, while the XTP9B-DMS-001 operates across 902MHz ~ 928MHz. Both fall within the General ISM < 1GHz band. The XTP9B-DMS-001's frequency range provides broader ISM band coverage within North American and international ISM allocations.

Q: Does the lower data rate of the XTP9B-DMS-001 (125kbps vs. 225kbps) affect system compatibility?

A: Data rate compatibility depends on application requirements. If the system requires 225kbps throughput, the XTP9B-DMS-001's 125kbps maximum rate is insufficient. If the application operates below 125kbps, the substitute is compatible. This must be evaluated against specific system bandwidth requirements.

Q: Are the antenna connectors identical between these modules?

A: Yes. Both modules use RP-SMA connectors with antenna not included. Existing antenna assemblies are mechanically and electrically compatible with the substitute module.

Q: What is the impact of the FHSS modulation difference?

A: The XT09-SI-MESH supports both FHSS and FSK modulation. The XTP9B-DMS-001 supports FSK only. If the system uses FHSS frequency hopping, the substitute cannot replicate this capability. FSK-only systems are fully compatible.

Q: Are power supply requirements identical?

A: Yes. Both modules operate within 2.8V ~ 5.5V supply voltage range. Existing power supply designs require no modification.

Q: What are the compliance and regulatory implications of substitution?

A: Both modules share identical REACH status, ECCN classification, and HTSUS codes. The XTP9B-DMS-001 adds RoHS Compliance certification, providing enhanced environmental compliance. No regulatory barriers exist for substitution.

Q: How does the improved power efficiency of the XTP9B-DMS-001 affect system design?

A: The substitute consumes 35mA in receive mode compared to 80mA for the original, reducing receive-mode power budget by approximately 56%. This improvement may allow extended battery life or reduced power supply capacity in battery-powered or power-constrained applications.