9DB104BGLFT Equivalent & Substitute Parts

Part Overview

The 9DB104BGLFT is a PCI Express (PCIe) Clock Buffer/Driver IC manufactured by Renesas Electronics Corporation. This device functions as a 1-to-4 differential clock distribution buffer operating at a maximum frequency of 220MHz in a 28-TSSOP surface mount package. The part is classified as obsolete, making identification of suitable substitute components necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical compatibility across supply voltage, frequency specifications, and differential signal characteristics while accommodating the same physical package footprint.

Substiute Parts

9DB104BGLFT

Renesas Electronics CorporationIn Stock: 23189DB104BGLFT Datasheet

Current PartRFQ

9DB403DGLFT

Renesas Electronics CorporationIn Stock: 57619DB403DGLFT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 9DB104BGLFT is determined by the following critical parameters:

Package Compatibility: The substitute must use the 28-TSSOP surface mount package with identical 0.173" (4.40mm) width to ensure PCB layout compatibility without redesign.

Electrical Interface: Both input and output must support differential signaling (Yes/Yes configuration) to maintain signal integrity in PCIe clock distribution applications.

Supply Voltage Range: The substitute must operate within the 3.135V to 3.465V supply voltage window to ensure compatibility with existing power delivery infrastructure.

Circuit Configuration: The substitute must provide 1 circuit with a 1:4 input-to-output ratio, delivering four differential clock outputs from a single differential input.

PLL Functionality: The substitute must include integrated PLL capability for clock generation and distribution.

Frequency Capability: The substitute must support the maximum frequency requirement of 220MHz or higher to accommodate the application's clock distribution needs.

The 9DB403DGLFT qualifies as a direct substitute by meeting all these criteria while offering enhanced frequency capability (400MHz) and active product status.

Parameter Comparison

Engineering Selection Recommendations

The 9DB403DGLFT is the qualified substitute for the obsolete 9DB104BGLFT. Selection is based on the following engineering criteria:

Product Status: The 9DB104BGLFT is classified as obsolete, creating supply chain risk. The 9DB403DGLFT maintains active product status with confirmed inventory availability, ensuring long-term procurement viability.

Regulatory Compliance: Both parts maintain identical REACH Unaffected and EAR99 export classification status, ensuring no change to regulatory documentation or compliance requirements.

Moisture Sensitivity: Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity constraints during storage, handling, or assembly.

Physical and Electrical Compatibility: The 9DB403DGLFT maintains identical package footprint, supply voltage range, operating temperature range, and differential signal architecture, enabling direct substitution without PCB redesign or power supply modification.

Enhanced Capability: The 9DB403DGLFT provides 400MHz maximum frequency operation, exceeding the 220MHz requirement of the original design. This enhanced capability provides additional performance margin for clock distribution applications.

Frequently Asked Questions (FAQ)

Q: Can the 9DB403DGLFT be used as a direct replacement for the 9DB104BGLFT without PCB modifications?

A: Yes. Both parts use the 28-TSSOP package with identical physical dimensions (0.173" width, 4.40mm). Pin-to-pin compatibility is maintained for the 1-to-4 differential clock buffer configuration. No PCB layout changes are required.

Q: Are the supply voltage requirements identical between the two parts?

A: Yes. Both the 9DB104BGLFT and 9DB403DGLFT operate within the 3.135V to 3.465V supply voltage range. Existing power delivery circuits require no modification.

Q: What is the significance of the 400MHz maximum frequency on the 9DB403DGLFT compared to the 220MHz specification of the 9DB104BGLFT?

A: The 9DB403DGLFT supports higher frequency operation, providing additional performance margin. Applications operating at or below 220MHz will function within the substitute's rated specifications with no adverse effects.

Q: Do both parts support the same differential input and output signal types?

A: Both parts provide differential input and differential output (Yes/Yes configuration) with integrated PLL functionality. The 9DB403DGLFT supports HCSL and LVDS output formats, maintaining compatibility with PCIe clock distribution requirements.

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

A: No. Both parts carry identical REACH Unaffected status, EAR99 export classification, and MSL 1 moisture sensitivity rating. Regulatory documentation and compliance requirements remain unchanged.

Q: What is the primary reason for substituting the 9DB104BGLFT?

A: The 9DB104BGLFT is classified as obsolete. The 9DB403DGLFT provides an active, in-stock alternative from the same manufacturer with identical electrical and physical specifications, ensuring design continuity and supply chain reliability.