MPC9239FN Equivalent & Substitute Parts

Part Overview

The MPC9239FN is a Clock/Frequency Synthesizer and Clock Generator Multiplexer IC manufactured by NXP Semiconductors, designed for 900MHz applications in a 28-LCC (J-Lead) surface mount package. This part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations. The device integrates a Phase-Locked Loop (PLL) with bypass capability, supporting LVCMOS input and dual output formats (LVCMOS and LVPECL), with a 1:1 input-to-output ratio and integrated divider/multiplier functionality.

Substiute Parts

MPC9239FN

NXP SemiconductorsIn Stock: 1220MPC9239FN Datasheet

Current PartRFQ

CDCVF111FN

Texas InstrumentsIn Stock: 1475CDCVF111FN Datasheet

MFR RecommendedRFQ

MPC9239EI

Renesas Electronics CorporationIn Stock: 3095MPC9239EI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MPC9239FN is determined by the following critical parameters: package compatibility (28-LCC J-Lead form factor), maximum frequency capability (900 MHz or higher), supply voltage range overlap (3.0V to 3.6V nominal), functional classification (clock synthesis or distribution), and output signal format compatibility (LVPECL capability). The identified substitutes meet these core electrical and mechanical criteria while maintaining the same physical footprint for direct board-level replacement.

The MPC9239EI represents a direct functional equivalent within the same base product family (MPC9239), offering active product status and improved compliance certifications. The CDCVF111FN provides an alternative approach through fanout buffer distribution architecture, suitable for applications where the 1:9 output ratio and 650 MHz maximum frequency align with system requirements.

Parameter Comparison

Engineering Selection Recommendations

The MPC9239EI is the primary substitute for direct replacement applications. It maintains identical package geometry (28-LCC J-Lead), matching supply voltage range (3.135V ~ 3.465V), and equivalent maximum frequency (900 MHz). The MPC9239EI offers superior product status (active versus obsolete) and achieves ROHS3 compliance, addressing regulatory requirements for new designs and long-term availability. The extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) provides additional margin for industrial applications.

The CDCVF111FN serves applications where fanout buffer distribution is the primary function. This substitute is suitable only when the 1:9 output ratio and 650 MHz maximum frequency satisfy system architecture requirements. The CDCVF111FN requires LVPECL input signals and delivers LVPECL outputs, differing from the MPC9239FN's LVCMOS input capability. Selection of the CDCVF111FN necessitates verification that downstream signal distribution requirements align with its 1:9 fanout architecture.

Both substitute parts maintain identical physical footprint compatibility and moisture sensitivity level (MSL 1 - Unlimited), enabling direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the MPC9239EI replace the MPC9239FN in existing designs without circuit modification?

A: The MPC9239EI is pin-compatible and functionally equivalent for applications operating within the 0°C ~ 70°C temperature range of the original MPC9239FN. The identical 28-LCC package, matching supply voltage range, and equivalent frequency specifications support direct substitution. Designs utilizing the extended temperature capability of the MPC9239EI (-40°C ~ 85°C) require no additional circuit changes.

Q: What are the key differences between the MPC9239EI and CDCVF111FN substitutes?

A: The MPC9239EI is a clock/frequency synthesizer with 1:1 input-to-output ratio and integrated divider/multiplier functionality, maintaining the original MPC9239FN architecture. The CDCVF111FN is a fanout buffer with 1:9 output distribution and 650 MHz maximum frequency. The MPC9239EI accepts LVCMOS input signals, while the CDCVF111FN requires LVPECL input. Selection depends on whether the application requires synthesis/multiplication capability (MPC9239EI) or simple signal distribution (CDCVF111FN).

Q: Are there temperature range considerations when substituting the MPC9239FN?

A: The MPC9239FN operates from 0°C ~ 70°C. Both substitute parts (MPC9239EI and CDCVF111FN) extend the operating range to -40°C ~ 85°C. Applications operating exclusively within the original 0°C ~ 70°C window face no thermal constraints with either substitute. Applications requiring operation below 0°C or above 70°C benefit from the extended range of the substitutes.

Q: Is the CDCVF111FN suitable for all MPC9239FN applications?

A: The CDCVF111FN is suitable only for applications where the 1:9 fanout buffer function and 650 MHz maximum frequency align with system requirements. Applications requiring clock synthesis, frequency multiplication, or operation above 650 MHz must use the MPC9239EI. The CDCVF111FN's LVPECL input requirement differs from the MPC9239FN's LVCMOS input, necessitating signal conditioning verification.

Q: What compliance advantages do the substitute parts offer?

A: Both the MPC9239EI and CDCVF111FN achieve ROHS3 compliance, compared to the MPC9239FN's RoHS non-compliant status. This compliance improvement supports regulatory requirements for new product designs and procurement in regions with RoHS mandates. All three parts maintain identical REACH Unaffected and EAR99 ECCN classifications.

Q: Can the MPC9239FN be used interchangeably with the MPC9239EI in new designs?

A: The MPC9239EI is the recommended choice for new designs due to its active product status, ROHS3 compliance, and extended operating temperature range. The MPC9239FN's obsolete status makes it unsuitable for new development. The MPC9239EI provides equivalent functionality with superior long-term availability and regulatory compliance.