FXO-LC735RFC-212.5 Equivalent & Substitute Parts

Part Overview

The FXO-LC735RFC-212.5 is a 212.5 MHz XO (Standard) LVDS oscillator manufactured by Renesas Electronics Corporation. This surface mount crystal oscillator operates at 3.3V with enable/disable functionality, housed in a 6-SMD, No Lead package. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

FXO-LC735RFC-212.5

Renesas Electronics CorporationIn Stock: 1128FXO-LC735RFC-212.5 Datasheet

Current PartRFQ

637L21253I3T

CTS-Frequency ControlsIn Stock: 1189637L21253I3T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FXO-LC735RFC-212.5 is determined by strict equivalence across the following critical parameters:

• Frequency: 212.5 MHz (exact match required)
• Output: LVDS (electrical interface compatibility)
• Supply Voltage: 3.3V (power supply compatibility)
• Function: Enable/Disable (functional requirement)
• Frequency Stability: ±50ppm (timing accuracy specification)
• Operating Temperature: -40°C ~ 85°C (environmental operating range)
• Package: 6-SMD, No Lead (physical and electrical footprint compatibility)

The substitute part 637L21253I3T meets all these criteria and is therefore a direct functional equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 637L21253I3T from CTS-Frequency Controls is a direct substitute for the obsolete FXO-LC735RFC-212.5. Both parts share identical electrical specifications across all critical parameters: frequency, output type, supply voltage, function, frequency stability, and operating temperature range.

The substitute part offers the advantage of active product status, ensuring ongoing availability and manufacturer support. The CTS part demonstrates lower maximum supply current (65mA versus 100mA), which may provide improved power efficiency in applications. Physical dimensions differ slightly, with the CTS part measuring 7.00mm x 5.00mm versus 7.50mm x 5.20mm for the Renesas part, and a marginal height difference of 0.27mm. Both parts maintain identical MSL 1 moisture sensitivity classification and REACH compliance status.

Frequently Asked Questions (FAQ)

Q: Can the 637L21253I3T replace the FXO-LC735RFC-212.5 in existing designs?

A: Yes. Both parts are electrically equivalent across all specified parameters: 212.5 MHz frequency, LVDS output, 3.3V supply, enable/disable function, ±50ppm stability, and -40°C to 85°C operating range. Both use identical 6-SMD, No Lead packaging.

Q: What are the physical differences between these parts?

A: The CTS part (637L21253I3T) measures 7.00mm x 5.00mm with 1.70mm maximum seated height, while the Renesas part measures 7.50mm x 5.20mm with 1.40mm maximum seated height. These dimensional variations are within typical PCB layout tolerances for surface mount components.

Q: Does the lower supply current of the CTS part affect performance?

A: No. The maximum supply current specification (65mA for CTS versus 100mA for Renesas) indicates the CTS part operates more efficiently. Both parts meet the same frequency stability and output specifications.

Q: Are there any compliance or certification differences?

A: Both parts share identical REACH compliance status (REACH Unaffected), ECCN classification (EAR99), and MSL 1 moisture sensitivity rating. The CTS part includes RoHS3 compliance certification.

Q: Why is the Renesas part listed as obsolete?

A: Product obsolescence indicates the manufacturer has discontinued production. The CTS equivalent maintains active status, ensuring continued availability for new procurement and system support.