XT09-MI RF Transceiver Module Equivalent & Substitute Parts

Part Overview

The XT09-MI is a General ISM < 1GHz transceiver module manufactured by Digi as part of the XTend® series. This module operates at 900MHz with FHSS and FSK modulation, delivering 225kbps data rate and 30dBm output power. The XT09-MI features MMCX chassis mount antenna connector and UART serial interface, designed for ISM band wireless applications requiring low-power operation across extended temperature ranges.

The XT09-MI is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain system compatibility and ensure continued availability for applications currently deployed with this module or for new designs requiring equivalent performance characteristics.

Substiute Parts

XT09-MI

DigiIn Stock: 842XT09-MI Datasheet

Current PartRFQ

XTP9B-DPM-001

DigiIn Stock: 1060XTP9B-DPM-001 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The XTP9B-DPM-001 qualifies as a direct substitute for the XT09-MI 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 transmit power)
• Sensitivity: -110dBm (identical receive sensitivity)
• Serial Interface: UART (identical communication protocol)
• Antenna Connector: MMCX (identical connector type)
• Voltage Supply: 2.8V ~ 5.5V (identical supply range)
• Operating Temperature: -40°C ~ 85°C (identical temperature range)
• Package Type: Module (same form factor category)

Substitution-Determining Parameters: The XTP9B-DPM-001 operates within the 902MHz ~ 928MHz frequency range, which encompasses the XT09-MI's 900MHz center frequency within the same ISM band allocation. Both modules support FSK modulation and maintain equivalent RF performance specifications. The primary differences are mounting type (surface mount vs. chassis mount), data rate (125kbps vs. 225kbps), receiving current (35mA vs. 80mA), and product status (active vs. obsolete).

Parameter Comparison

Engineering Selection Recommendations

The XTP9B-DPM-001 is the designated active substitute for the obsolete XT09-MI. Selection of the XTP9B-DPM-001 is supported by the following engineering criteria:

Product Status: The XTP9B-DPM-001 maintains active manufacturing status with confirmed inventory availability (967 pcs), ensuring long-term supply continuity compared to the XT09-MI's obsolete classification.

Regulatory Compliance: The XTP9B-DPM-001 achieves RoHS compliance, whereas the XT09-MI is RoHS non-compliant. For applications subject to RoHS directives or environmental regulations, the XTP9B-DPM-001 provides compliant component selection.

Electrical Equivalence: Both modules maintain identical RF performance parameters (30dBm output, -110dBm sensitivity), identical supply voltage range (2.8V ~ 5.5V), and identical operating temperature range (-40°C ~ 85°C). UART serial interface compatibility ensures direct firmware and protocol compatibility.

Frequency Band Compatibility: The XTP9B-DPM-001's 902MHz ~ 928MHz operating range encompasses the XT09-MI's 900MHz center frequency within the same ISM band allocation, maintaining regulatory compliance and interoperability within the same frequency band.

Mechanical Considerations: The primary design difference is mounting type (surface mount vs. chassis mount). Applications currently using chassis-mount configurations require PCB redesign or mechanical adapter solutions to accommodate the XTP9B-DPM-001's surface-mount package. The MMCX antenna connector remains identical, eliminating antenna interface modifications.

Performance Trade-offs: The XTP9B-DPM-001 operates at 125kbps data rate compared to the XT09-MI's 225kbps. Applications requiring the higher 225kbps data rate must evaluate whether the reduced bandwidth is acceptable for system requirements. Receiving current consumption is reduced (35mA vs. 80mA), providing improved power efficiency in receive-mode operations.

Frequently Asked Questions (FAQ)

Q: Can the XTP9B-DPM-001 directly replace the XT09-MI without PCB modifications?

A: Direct replacement requires mechanical accommodation of the mounting type difference. The XT09-MI uses chassis mount configuration, while the XTP9B-DPM-001 uses surface mount. PCB redesign or mechanical adapter solutions are necessary for physical integration. All electrical interfaces (UART, power supply, antenna connector) are compatible.

Q: Are the XT09-MI and XTP9B-DPM-001 frequency-compatible for the same application?

A: Yes. Both modules operate within the General ISM < 1GHz band. The XT09-MI operates at 900MHz, while the XTP9B-DPM-001 operates across 902MHz ~ 928MHz. This frequency overlap ensures both modules can operate within the same ISM band allocation and maintain regulatory compliance in the same geographic regions.

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

A: The XTP9B-DPM-001 operates at 125kbps compared to the XT09-MI's 225kbps. Applications must verify that 125kbps throughput meets system bandwidth requirements. Lower data rate may extend transmission time for fixed data payloads, affecting system latency and power consumption profiles.

Q: Does the XTP9B-DPM-001 support FHSS modulation like the XT09-MI?

A: The XTP9B-DPM-001 specification indicates FSK modulation support. FHSS capability is not specified for the XTP9B-DPM-001. Applications dependent on FHSS frequency-hopping functionality must verify modulation support with Digi technical documentation before substitution.

Q: What are the power consumption implications of substituting the XTP9B-DPM-001?

A: The XTP9B-DPM-001 provides improved receive-mode efficiency (35mA vs. 80mA). Transmit current remains comparable (710mA vs. 90mA ~ 730mA range). Overall system power consumption depends on application duty cycle. Receive-heavy applications benefit from reduced idle current; transmit-heavy applications show minimal power difference.

Q: Is the XTP9B-DPM-001 suitable for applications requiring RoHS compliance?

A: Yes. The XTP9B-DPM-001 is RoHS compliant, whereas the XT09-MI is RoHS non-compliant. Applications subject to RoHS directives or customer environmental requirements must use the XTP9B-DPM-001 to achieve regulatory compliance.

Q: What packaging format is the XTP9B-DPM-001 supplied in?

A: The XTP9B-DPM-001 is supplied in tray packaging. Verify tray quantity and handling requirements for your procurement and assembly processes.