ICS9FG108DFLF Equivalent & Substitute Parts

Part Overview

The ICS9FG108DFLF is a Clock/Frequency Synthesizer IC manufactured by Renesas Electronics Corporation, designed for Intel CPU Server, PCI Express (PCIe), and SATA applications. This device generates a 400MHz spread spectrum clock output from crystal or clock inputs using a phase-locked loop (PLL) architecture. The part is classified as obsolete, making identification of active equivalent substitutes essential for ongoing system support and new design implementations.

Substiute Parts

ICS9FG108DFLF

Renesas Electronics CorporationIn Stock: 1615ICS9FG108DFLF Datasheet

Current PartRFQ

9FG108EFLF

Renesas Electronics CorporationIn Stock: 11199FG108EFLF Datasheet

MFR RecommendedRFQ

9FG108EFLFT

Renesas Electronics CorporationIn Stock: 16109FG108EFLFT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ICS9FG108DFLF is determined by strict equivalence across the following critical parameters:

• Package / Case: 48-BSSOP (0.295", 7.50mm Width) — physical and electrical compatibility
• Frequency - Max: 400MHz — output frequency specification
• Voltage - Supply: 3.135V ~ 3.465V — power supply range
• Operating Temperature: 0°C ~ 70°C — thermal operating range
• Output Type: HCSL — signal output standard
• Input Type: Clock, Crystal — input signal compatibility
• Ratio - Input:Output: 1:9 — frequency multiplication factor
• Differential - Input:Output: No/Yes — differential signaling configuration
• Number of Circuits: 1 — single circuit architecture
• PLL: Yes — phase-locked loop functionality

The identified substitutes (9FG108EFLF and 9FG108EFLFT) maintain identical electrical and functional specifications across all critical parameters. Both parts are manufactured by Renesas Electronics Corporation and are classified as active products, providing long-term availability compared to the obsolete ICS9FG108DFLF.

Parameter Comparison

Engineering Selection Recommendations

Both 9FG108EFLF and 9FG108EFLFT are direct functional equivalents to the ICS9FG108DFLF, with identical electrical specifications and performance characteristics. The primary distinctions are product status and compliance certifications:

Product Status: The ICS9FG108DFLF is obsolete, while both substitute parts are active products with confirmed current inventory availability. Active product status ensures continued manufacturing support and supply chain reliability.

Compliance: Both substitute parts carry ROHS3 compliance certification, meeting current environmental and regulatory requirements. The original ICS9FG108DFLF does not specify RoHS status.

Moisture Sensitivity: The substitute parts are rated MSL 3 (168 Hours), compared to MSL 1 (Unlimited) for the original part. This difference reflects standard handling and storage requirements for active production parts.

Packaging: Selection between 9FG108EFLF (Tube) and 9FG108EFLFT (Tape & Reel) depends on assembly process requirements and volume considerations. Both maintain identical electrical and mechanical specifications.

Frequently Asked Questions (FAQ)

Q: Are 9FG108EFLF and 9FG108EFLFT electrically identical to ICS9FG108DFLF?

A: Yes. Both substitute parts maintain identical specifications across all critical electrical parameters: 400MHz maximum frequency, 3.135V–3.465V supply voltage, 0°C–70°C operating temperature range, HCSL output type, 1:9 input-to-output ratio, and PLL architecture.

Q: What is the difference between 9FG108EFLF and 9FG108EFLFT?

A: The parts are electrically and functionally identical. The difference is packaging format: 9FG108EFLF is supplied in Tube packaging, while 9FG108EFLFT is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements and volume needs.

Q: Why is the ICS9FG108DFLF classified as obsolete?

A: The ICS9FG108DFLF has been superseded by the active 9FG108EFLF and 9FG108EFLFT variants. Renesas Electronics Corporation continues to manufacture and support the newer part numbers, which offer improved compliance certifications and active product status.

Q: Can I use these substitutes in existing designs without modification?

A: The substitute parts are pin-compatible and functionally equivalent within the specified electrical parameters. PCB layout and design considerations remain unchanged. Verify that your application operates within the specified voltage range (3.135V–3.465V) and temperature range (0°C–70°C).

Q: What is the Moisture Sensitivity Level (MSL) difference, and does it affect my application?

A: The original part is MSL 1 (Unlimited), while substitutes are MSL 3 (168 Hours). MSL 3 requires standard moisture control during storage and handling. For most applications with standard manufacturing practices, this difference has no functional impact. Consult your assembly process specifications if moisture sensitivity is a critical concern.

Q: Are both substitute parts currently in stock?

A: Yes. 9FG108EFLF has 1037 pieces in stock, and 9FG108EFLFT has 1526 pieces in stock, both classified as new original inventory.