Equivalent & Substitute Parts for 9DB633AFILFT

Part Overview

The 9DB633AFILFT is a PCI Express (PCIe) Fanout Buffer IC manufactured by Renesas Electronics Corporation, designed for clock distribution and zero-delay buffering applications. This device features a single output with a 1:6 input-to-output ratio, operating at a maximum frequency of 110MHz with differential HCSL output signaling. The part is classified as obsolete, necessitating identification of functionally compatible alternatives for ongoing system support and new designs requiring equivalent performance characteristics.

Substiute Parts

9DB633AFILFT

Renesas Electronics CorporationIn Stock: 8529DB633AFILFT Datasheet

Current PartRFQ

9ZXL0631EKILFT

Renesas Electronics CorporationIn Stock: 9379ZXL0631EKILFT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9DB633AFILFT is determined by the following critical parameters that must remain consistent or be compatible with the original design:

• Functional Architecture: Single-circuit fanout buffer with PLL capability for clock distribution
• Signal Characteristics: Differential input and HCSL differential output configuration
• Input-to-Output Ratio: 1:6 distribution ratio
• Supply Voltage Range: 3.135V ~ 3.465V compatibility
• Operating Temperature Range: -40°C ~ 85°C
• Mounting Technology: Surface mount configuration
• Regulatory Compliance: RoHS3 and REACH compliance status

The identified substitute part 9ZXL0631EKILFT maintains functional equivalence through matching signal architecture, voltage specifications, temperature range, and compliance certifications. While the substitute operates at a higher maximum frequency (400MHz versus 110MHz) and utilizes a different package form factor (40-VFQFPN versus 28-SSOP), these parameters represent enhanced or alternative specifications that do not compromise backward compatibility for PCIe clock distribution applications.

Parameter Comparison

Engineering Selection Recommendations

The 9ZXL0631EKILFT serves as a functional substitute for the obsolete 9DB633AFILFT based on the following engineering criteria:

Product Status Alignment: The substitute part maintains active production status with Renesas Electronics Corporation, ensuring long-term availability and supply chain continuity compared to the obsolete original part.

Regulatory Compliance: Both parts maintain REACH Unaffected status and EAR99 export classification, ensuring compliance with international regulatory frameworks. The substitute's RoHS compliance status aligns with the original part's ROHS3 designation.

Electrical Compatibility: Matching supply voltage range (3.135V ~ 3.465V), operating temperature range (-40°C ~ 85°C), and signal architecture (differential HCSL output with 1:6 ratio) ensure functional equivalence in PCIe clock distribution circuits.

Performance Enhancement: The substitute's maximum frequency specification of 400MHz exceeds the original part's 110MHz rating, providing operational margin for existing designs without introducing compatibility constraints.

Package Consideration: The transition from 28-SSOP to 40-VFQFPN package requires PCB layout modification and footprint redesign. This represents a physical change that must be evaluated within the context of available board space and manufacturing capabilities.

Frequently Asked Questions (FAQ)

Q: Can the 9ZXL0631EKILFT directly replace the 9DB633AFILFT without circuit modifications?

A: Electrical compatibility is maintained through identical supply voltage, operating temperature range, and signal characteristics. However, the package change from 28-SSOP to 40-VFQFPN requires PCB footprint redesign and layout modifications. Functional substitution is possible with physical redesign.

Q: What is the significance of the higher 400MHz maximum frequency in the substitute part?

A: The 400MHz specification in the 9ZXL0631EKILFT represents enhanced performance capability compared to the original part's 110MHz rating. For PCIe applications operating at or below 110MHz, this higher frequency rating provides operational margin without introducing compatibility issues.

Q: Are there differences in moisture sensitivity between the two parts?

A: The original part specifies MSL 1 (Unlimited), while the substitute part specifies MSL 3 (168 Hours). This indicates different moisture absorption characteristics and handling requirements during storage and assembly. The substitute part requires more controlled moisture exposure management.

Q: Does the substitute part support both Intel QPI and PCI Express applications?

A: The substitute part is specified for both Intel QPI and PCI Express applications, while the original part is specified for PCI Express only. This expanded application range does not affect PCIe compatibility.

Q: What packaging format is available for the substitute part?

A: The 9ZXL0631EKILFT is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. Verify packaging format compatibility with your manufacturing requirements.