XT09-4II-RA RF Transceiver Modem Equivalent & Substitute Parts

Part Overview

The XT09-4II-RA is an RF transceiver modem manufactured by Digi, operating in the 902MHz to 928MHz frequency band with FSK modulation. It provides RS-232 and RS-485 serial interfaces for industrial communication applications. The product is classified as obsolete, making equivalent and substitute parts necessary for system maintenance, redesign, and procurement continuity. The CL4790-1000-232 from Laird Connectivity Inc. serves as a manufacturer-recommended substitute, offering comparable core functionality within the same frequency band.

Substiute Parts

XT09-4II-RA

DigiIn Stock: 1101XT09-4II-RA Datasheet

Current PartRFQ

CL4790-1000-232

Laird Connectivity Inc.In Stock: 1560CL4790-1000-232 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The CL4790-1000-232 qualifies as a substitute based on the following critical parameters:

• Frequency Compatibility: Both parts operate within the 902MHz to 928MHz ISM band, ensuring RF compatibility with existing antenna systems and network infrastructure.
• Modulation Support: Both support FSK modulation, maintaining protocol compatibility with legacy systems.
• Serial Interface: The CL4790-1000-232 provides RS-232 interface, compatible with the primary serial communication method of the XT09-4II-RA.
• Supply Voltage Range: The CL4790-1000-232 operates at 7V to 18V, which overlaps with the XT09-4II-RA range of 7V to 28V, allowing operation within common industrial power supplies.
• Moisture Sensitivity: Both parts have MSL 1 (Unlimited), indicating identical environmental handling requirements.
• Regulatory Compliance: Both are REACH Unaffected, ensuring equivalent regulatory standing.

Parameter Comparison

Engineering Selection Recommendations

The CL4790-1000-232 is the manufacturer-recommended substitute for the obsolete XT09-4II-RA. Selection of this substitute is appropriate when:

• Systems require RS-232 serial communication only (RS-485 interface is not required).
• Operating voltage does not exceed 18V DC.
• Maximum data rate requirements do not exceed 115.2kbps.
• The application can tolerate reduced receiver sensitivity (-99dBm versus -110dBm).
• Active product support and availability are required.

The CL4790-1000-232 carries RoHS Compliance certification, providing regulatory advantage over the obsolete XT09-4II-RA for new designs and system upgrades. Both parts maintain identical moisture sensitivity classification and REACH compliance status.

Frequently Asked Questions (FAQ)

Q: Can the CL4790-1000-232 replace the XT09-4II-RA in all applications?

A: The CL4790-1000-232 is suitable for applications using RS-232 interface only. Systems requiring RS-485 communication must evaluate alternative substitutes or implement interface conversion circuitry.

Q: What is the impact of the reduced data rate on system performance?

A: The CL4790-1000-232 supports 115.2kbps maximum data rate compared to 230kbps for the XT09-4II-RA. Applications operating below 115.2kbps will experience no performance degradation. Systems requiring higher throughput must identify alternative components.

Q: Are there voltage supply compatibility issues?

A: The CL4790-1000-232 operates at 7V to 18V, while the XT09-4II-RA supports 7V to 28V. Installations using supply voltages between 18V and 28V require voltage regulation or alternative substitutes.

Q: How does receiver sensitivity affect range and performance?

A: The XT09-4II-RA provides -110dBm sensitivity versus -99dBm for the CL4790-1000-232. This 11dB difference may reduce communication range in weak signal environments. Applications with marginal link budgets should evaluate this parameter carefully.

Q: What are the packaging and inventory considerations?

A: The XT09-4II-RA is obsolete with 994 pieces in stock. The CL4790-1000-232 is active production with 1508 pieces available. For long-term system support, the active product status of the CL4790-1000-232 provides superior supply chain continuity.

Q: Are there regulatory or compliance differences?

A: Both parts are REACH Unaffected. The CL4790-1000-232 carries RoHS Compliance certification, providing regulatory advantage for new system designs and markets with RoHS requirements.