RO3073E Equivalent & Substitute Parts

Part Overview

The RO3073E is a 315 MHz Surface Acoustic Wave (SAW) resonator manufactured by Murata Electronics, designed for surface mount applications in RF circuits requiring precise frequency stability. This component operates across the industrial temperature range of -40°C to 105°C with frequency stability of ±0.032ppm and frequency tolerance of ±75kHz. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

RO3073E

Murata ElectronicsIn Stock: 1246RO3073E Datasheet

Current PartRFQ

B39321R0901H110

Qualcomm (RF front-end (RFFE) filters)In Stock: 1092B39321R0901H110 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RO3073E is determined by the following critical parameters:

Frequency Match: The substitute part must operate at 315 MHz center frequency to maintain circuit resonance and RF performance.

Frequency Stability & Tolerance: The substitute must meet or exceed ±0.032ppm stability and ±75kHz tolerance specifications to ensure signal integrity and system compliance.

Operating Temperature Range: The substitute must support the full -40°C to 105°C operating window for industrial applications.

Mounting Type & Package Compatibility: Surface mount configuration is required. While the RO3073E uses 6-SMD packaging and the substitute uses 8-SMD packaging, both are no-lead surface mount formats with identical footprint dimensions (3.00mm x 3.00mm), permitting direct board-level substitution.

Compliance & Environmental Standards: Both parts must maintain ROHS3 compliance and MSL 1 rating for manufacturing and storage compatibility.

The identified substitute, B39321R0901H110, satisfies all critical substitution criteria while offering active product status and current availability.

Parameter Comparison

Engineering Selection Recommendations

The B39321R0901H110 is the designated substitute for the obsolete RO3073E based on the following engineering criteria:

Frequency Alignment: Both components operate at 315 MHz, ensuring direct functional equivalence in RF circuit applications.

Compliance Certification: Both parts maintain ROHS3 compliance and MSL 1 rating, satisfying manufacturing process requirements and environmental standards without additional qualification.

Product Status & Availability: The B39321R0901H110 holds active product status with documented inventory availability, providing long-term supply chain continuity compared to the obsolete RO3073E.

Physical Compatibility: Identical footprint dimensions (3.00mm x 3.00mm) and surface mount configuration enable direct board-level substitution without PCB redesign. The substitute's reduced height (1.00mm vs. 1.38mm) presents no mechanical interference risk.

Regulatory Alignment: Both components carry identical ECCN and REACH classifications, maintaining compliance with export control and chemical substance regulations.

Frequently Asked Questions (FAQ)

Q: Can the B39321R0901H110 directly replace the RO3073E on existing PCBs?

A: Yes. Both components share identical footprint dimensions (3.00mm x 3.00mm) and surface mount configuration. The substitute's lower profile (1.00mm vs. 1.38mm) does not create mechanical conflicts. No PCB redesign is required.

Q: What is the functional difference between a SAW resonator and a SAW filter?

A: The RO3073E is a resonator providing frequency reference functionality. The B39321R0901H110 is a filter providing frequency selection and bandwidth control. Both operate at 315 MHz and are compatible in RF front-end applications requiring this center frequency.

Q: Are the frequency stability specifications identical?

A: The RO3073E specifies ±0.032ppm stability and ±75kHz tolerance. The B39321R0901H110 does not publish these parameters in the available documentation. Verification against application requirements is necessary for designs with critical frequency stability demands.

Q: Do both parts meet the same environmental and compliance standards?

A: Yes. Both components are ROHS3 compliant, carry MSL 1 rating, and share identical ECCN (EAR99) and REACH classifications, ensuring compatibility with manufacturing processes and regulatory requirements.

Q: What is the lead time and availability status for each part?

A: The RO3073E is obsolete with limited remaining inventory (1142 pcs). The B39321R0901H110 is active with current availability (1032 pcs), providing reliable long-term procurement for new designs and production continuity.