Renesas 9DB401CGLF PCIe Fanout Buffer - Equivalent & Substitute Parts

Part Overview

The Renesas 9DB401CGLF is a PCI Express (PCIe) fanout buffer IC designed for zero-delay clock distribution in high-speed digital applications. This device functions as a 1:4 differential buffer with HCSL input and HCSL/LVDS output capability, operating at frequencies up to 400MHz. The 9DB401CGLF is classified as obsolete, making identification of active equivalent parts essential for new designs and production continuity. Substitute parts must maintain identical electrical performance, package compatibility, and functional specifications to ensure seamless integration into existing PCB layouts and signal integrity requirements.

Substiute Parts

9DB401CGLF

Renesas Electronics CorporationIn Stock: 35019DB401CGLF Datasheet

Current PartRFQ

9DB403DGLF

Renesas Electronics CorporationIn Stock: 21849DB403DGLF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 9DB401CGLF is determined by strict equivalence across the following critical parameters:

• Package Compatibility: Both parts must use 28-TSSOP surface mount packaging with identical physical dimensions (0.173", 4.40mm Width) to ensure PCB layout compatibility without redesign.
• Signal Architecture: Input/output ratio of 1:4 with differential signaling on both input and output paths is mandatory.
• Signal Levels: HCSL input and HCSL/LVDS output capability must be maintained for signal integrity and system compatibility.
• Frequency Performance: Maximum operating frequency of 400MHz must be met or exceeded.
• Electrical Specifications: Supply voltage range (3.135V ~ 3.465V), operating temperature range (0°C ~ 70°C), and PLL functionality must be identical.
• Regulatory Compliance: RoHS3 compliance, MSL 1 rating, and REACH unaffected status ensure environmental and regulatory alignment.

The 9DB403DGLF qualifies as a manufacturer-recommended substitute based on complete parameter equivalence across all electrical, mechanical, and regulatory criteria.

Parameter Comparison

Engineering Selection Recommendations

The 9DB403DGLF is the direct substitute for the obsolete 9DB401CGLF. Both parts are manufactured by Renesas Electronics Corporation and maintain complete electrical and mechanical equivalence. The 9DB403DGLF carries active product status, ensuring ongoing availability and manufacturing support.

Selection of the 9DB403DGLF for new designs or production replacement is based on:

• Product Status Alignment: The 9DB403DGLF is actively manufactured and supported, eliminating obsolescence risk associated with the 9DB401CGLF.
• Regulatory Compliance: Both parts maintain identical RoHS3 compliance, MSL 1 rating, and REACH unaffected status, satisfying environmental and regulatory requirements without modification.
• Functional Equivalence: All electrical parameters, signal types, frequency performance, and supply specifications are identical, enabling direct substitution without circuit redesign or signal integrity concerns.
• Package Compatibility: Identical 28-TSSOP packaging ensures PCB layout compatibility and eliminates mechanical redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can the 9DB403DGLF be used as a direct replacement for the 9DB401CGLF in existing designs?

A: Yes. The 9DB403DGLF is electrically and mechanically equivalent to the 9DB401CGLF across all specified parameters. No circuit modifications, PCB layout changes, or signal integrity re-evaluation are required for substitution.

Q: Are there any differences in package dimensions between these parts?

A: No. Both the 9DB401CGLF and 9DB403DGLF use identical 28-TSSOP packaging with 0.173" width and 4.40mm dimensions. PCB footprints are fully compatible.

Q: What is the significance of the product status difference?

A: The 9DB401CGLF is classified as obsolete, indicating discontinued manufacturing and limited availability. The 9DB403DGLF is actively produced by Renesas Electronics Corporation, ensuring reliable supply for current and future production requirements.

Q: Do both parts support the same signal types and frequency ranges?

A: Yes. Both parts support HCSL input and HCSL/LVDS output with 1:4 differential buffering at frequencies up to 400MHz. Supply voltage ranges (3.135V ~ 3.465V) and operating temperature ranges (0°C ~ 70°C) are identical.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts maintain identical RoHS3 compliance, MSL 1 moisture sensitivity rating, and REACH unaffected status. No additional compliance documentation or testing is required for substitution.

Q: What inventory status should be considered when selecting between these parts?

A: The 9DB401CGLF has 3,478 pieces in stock but is obsolete. The 9DB403DGLF has 2,154 pieces in stock and is actively manufactured. For new designs and long-term production, the 9DB403DGLF is the appropriate selection.