Equivalent & Substitute Parts for 9DB633AFILF

Part Overview

The 9DB633AFILF is a PCI Express (PCIe) Fanout Buffer IC manufactured by Renesas Electronics Corporation. This zero-delay buffer device functions as a clock distribution component with a single output and 1:6 input-to-output ratio, designed for high-speed PCIe applications. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

9DB633AFILF

Renesas Electronics CorporationIn Stock: 7689DB633AFILF Datasheet

Current PartRFQ

9ZXL0631EKILF

Renesas Electronics CorporationIn Stock: 15309ZXL0631EKILF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9DB633AFILF is determined by the following critical parameters:

Electrical Compatibility Requirements:

• PLL functionality (Yes)
• Input/Output differential configuration (Yes/Yes)
• Output format (HCSL)
• Supply voltage range (3.135V ~ 3.465V)
• Operating temperature range (-40°C ~ 85°C)
• Input-to-output ratio (1:6)

Mechanical Compatibility Requirements:

• Surface mount mounting type
• Package footprint compatibility

The 9ZXL0631EKILF qualifies as a substitute based on matching all critical electrical parameters. While this substitute operates at a higher maximum frequency (400 MHz versus 110 MHz), this represents an enhancement rather than a limitation, as the substitute maintains full backward compatibility with the original part's electrical specifications and functional requirements.

Parameter Comparison

Engineering Selection Recommendations

The 9ZXL0631EKILF is the designated substitute for the obsolete 9DB633AFILF. Selection of this substitute is supported by the following factors:

Product Status: The original part is classified as obsolete, while the substitute maintains active product status with current manufacturing availability (1433 units in stock versus 678 units for the original).

Electrical Equivalence: All critical electrical parameters match the original specification, including supply voltage, operating temperature range, differential input/output configuration, and HCSL output format. The enhanced maximum frequency of the substitute (400 MHz) provides operational margin beyond the original 110 MHz specification.

Compliance: Both parts maintain REACH Unaffected status. The substitute's RoHS compliance status is not specified in the provided data.

Packaging Consideration: The substitute uses a 40-VFQFN package versus the original 28-SSOP package. This represents a physical footprint change requiring PCB layout modification.

Moisture Sensitivity: The substitute has MSL 3 (168 hours) compared to the original MSL 1 (unlimited). This requires adherence to moisture control procedures during storage and handling.

Frequently Asked Questions (FAQ)

Q: Can the 9ZXL0631EKILF directly replace the 9DB633AFILF without circuit modifications?

A: Electrical substitution is valid based on matching supply voltage, operating temperature, differential configuration, and HCSL output format. However, the package change from 28-SSOP to 40-VFQFN requires PCB layout redesign.

Q: Why does the substitute have a higher maximum frequency specification?

A: The 9ZXL0631EKILF operates at 400 MHz maximum versus 110 MHz for the original part. This enhanced specification maintains full backward compatibility and provides additional operational margin for PCIe applications.

Q: What is the impact of the different Moisture Sensitivity Levels?

A: The original part (MSL 1) has unlimited shelf life under standard conditions. The substitute (MSL 3) requires storage at controlled humidity levels and has a 168-hour floor life after moisture exposure. Proper moisture control procedures must be implemented during component handling and assembly.

Q: Are there any compliance differences between the two parts?

A: Both parts maintain REACH Unaffected status. The original part is ROHS3 compliant; the substitute's RoHS compliance status is not specified in the available data.

Q: What applications support this substitution?

A: Both parts are designed for PCI Express (PCIe) applications. The substitute additionally supports Intel QPI applications, expanding its functional scope while maintaining full PCIe compatibility.