RO3102A SAW Resonator Equivalent & Substitute Parts

Part Overview

The RO3102A is a 433.92 MHz Surface Acoustic Wave (SAW) resonator manufactured by Murata Electronics, designed for RF applications requiring precise frequency stability in the 433 MHz ISM band. This component operates across the industrial temperature range of -40°C to 85°C with a frequency stability of 32 ppb and an impedance of 1 MOhms.

The RO3102A is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance of systems utilizing this resonator.

Substiute Parts

RO3102A

Murata ElectronicsIn Stock: 1106RO3102A Datasheet

Current PartRFQ

ASR423.22E-T

Abracon LLCIn Stock: 1205ASR423.22E-T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of SAW resonators is determined by the following critical parameters:

• Frequency Compatibility: The operating frequency must align with the application's RF requirements. The RO3102A operates at 433.92 MHz within the 433 MHz ISM band.
• Operating Temperature Range: The component must support the full industrial temperature range of -40°C to 85°C.
• Mounting Type and Package: Surface mount compatibility and physical dimensions must accommodate existing PCB layouts.
• Impedance and Electrical Characteristics: The 1 MOhms impedance and frequency stability specifications define the electrical performance envelope.

The ASR423.22E-T is identified as a manufacturer-recommended substitute. This part maintains surface mount compatibility and operates within the same industrial temperature range. However, the frequency differs at 423.22 MHz, which represents a shift from the original 433.92 MHz specification. This frequency difference must be evaluated against application requirements and RF circuit design parameters.

Parameter Comparison

Engineering Selection Recommendations

The RO3102A is obsolete, making the ASR423.22E-T the manufacturer-recommended alternative. Selection of this substitute requires consideration of the following factors based on provided specifications:

Product Status: The ASR423.22E-T is active and currently in production, ensuring ongoing availability and supply chain support compared to the obsolete RO3102A.

Compliance and Certifications: The ASR423.22E-T is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components in industrial and consumer applications.

Package and Footprint Differences: The ASR423.22E-T uses an 8-SMD package versus the 4-SMD package of the RO3102A, with a larger footprint (5.00 mm × 5.00 mm versus 5.00 mm × 4.60 mm). PCB layout modifications may be required to accommodate this dimensional change.

Frequency Specification: The ASR423.22E-T operates at 423.22 MHz, which differs from the RO3102A's 433.92 MHz specification. This frequency offset must be evaluated within the context of the application's RF circuit design, filtering, and tuning requirements.

Frequently Asked Questions (FAQ)

Q: Can the ASR423.22E-T directly replace the RO3102A without circuit modifications?

A: Direct replacement requires evaluation of the frequency difference and package footprint change. The 423.22 MHz frequency of the ASR423.22E-T differs from the 433.92 MHz specification of the RO3102A. RF circuit tuning and impedance matching networks may require adjustment. The larger package footprint (5.00 mm × 5.00 mm) must be accommodated within the PCB layout.

Q: What is the significance of the frequency tolerance specification?

A: The RO3102A specifies a frequency tolerance of ±75 kHz, defining the acceptable deviation from the nominal 433.92 MHz frequency. This tolerance is critical for applications requiring precise frequency control within the 433 MHz ISM band. The ASR423.22E-T does not provide frequency tolerance data in the available specifications.

Q: Are there differences in frequency stability between these parts?

A: The RO3102A specifies a frequency stability of 32 ppb (parts per billion), which defines the frequency drift over temperature and time. The ASR423.22E-T does not provide frequency stability specifications in the available data. This parameter difference must be considered for applications requiring tight frequency control.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: Moisture Sensitivity Level 1 indicates the lowest moisture sensitivity classification. Both the RO3102A and ASR423.22E-T are rated MSL 1, meaning they have unlimited shelf life and do not require special moisture control during storage or handling.

Q: How do the package differences affect PCB design?

A: The RO3102A uses a 4-SMD package with dimensions of 5.00 mm × 4.60 mm and a height of 1.60 mm. The ASR423.22E-T uses an 8-SMD package with dimensions of 5.00 mm × 5.00 mm and a height of 1.35 mm. The larger footprint and different pin configuration require PCB layout redesign and potential modifications to surrounding component placement.