PI6C20400HEX Equivalent & Substitute Parts

Part Overview

The PI6C20400HEX is a PCI Express (PCIe) clock buffer IC manufactured by Diodes Incorporated, designed to distribute differential clock signals in high-speed digital applications. This device features a 1:4 input-to-output ratio with HCSL (High-Speed Current Steering Logic) differential signaling at 100MHz maximum frequency. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

PI6C20400HEX

Diodes IncorporatedIn Stock: 9711PI6C20400HEX Datasheet

Current PartRFQ

9DB403DFLF

Renesas Electronics CorporationIn Stock: 11909DB403DFLF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PI6C20400HEX is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Package type: 28-SSOP form factor (0.209", 5.30mm Width)
• Mounting type: Surface Mount
• Input/Output signaling: HCSL differential (Yes/Yes)
• Number of circuits: 1
• Input-to-output ratio: 1:4
• Supply voltage range: 3.135V ~ 3.465V
• Operating temperature range: 0°C ~ 70°C
• Application category: PCI Express (PCIe) clock distribution

Acceptable Parameter Variations:

• Maximum frequency may exceed 100MHz (backward compatible)
• Output signaling may include additional standards (LVDS in addition to HCSL)
• Product status may be Active (preferred for new designs)
• Compliance certifications must maintain ROHS3 and REACH standards

The 9DB403DFLF from Renesas Electronics Corporation meets all mandatory criteria and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The 9DB403DFLF is qualified as a direct substitute for the PI6C20400HEX based on the following engineering criteria:

Electrical Compatibility: Both devices operate within identical supply voltage ranges (3.135V ~ 3.465V) and temperature specifications (0°C ~ 70°C). The 9DB403DFLF maintains full HCSL differential input/output compatibility while supporting the same 1:4 distribution ratio. The higher maximum frequency rating (400MHz vs. 100MHz) presents no compatibility risk in applications designed for 100MHz operation.

Mechanical Compatibility: Identical 28-SSOP package geometry and surface mount configuration ensure direct PCB layout compatibility without redesign requirements.

Regulatory Compliance: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying environmental and regulatory requirements.

Product Lifecycle: The 9DB403DFLF is in active production status, providing supply chain continuity and long-term availability advantages over the obsolete PI6C20400HEX.

Frequently Asked Questions (FAQ)

Q: Can the 9DB403DFLF be used as a direct replacement on existing PCBs designed for the PI6C20400HEX?

A: Yes. The 9DB403DFLF is pin-compatible and functionally equivalent. Identical package geometry (28-SSOP), supply voltage requirements, and operating temperature range permit direct substitution without PCB modifications.

Q: What is the significance of the higher 400MHz maximum frequency on the 9DB403DFLF compared to the 100MHz specification of the PI6C20400HEX?

A: The 400MHz rating indicates the device's maximum operational capability. In applications requiring 100MHz operation, the 9DB403DFLF operates well within its specifications, providing design margin and future upgrade flexibility without performance degradation.

Q: Are there differences in output signaling between these devices?

A: The PI6C20400HEX outputs HCSL differential signals exclusively. The 9DB403DFLF supports both HCSL and LVDS differential output modes. In applications requiring HCSL output only, the 9DB403DFLF operates in HCSL mode, maintaining full compatibility.

Q: Do both devices require identical PCB layout and termination considerations?

A: Yes. Both devices feature identical electrical characteristics for the common HCSL differential signaling standard. Existing PCB layout, termination schemes, and signal integrity designs remain valid for the substitute part.

Q: What is the inventory status for these parts?

A: The PI6C20400HEX (obsolete) has 9668 units in stock. The 9DB403DFLF (active production) has 1110 units in stock, with ongoing availability through standard distribution channels.

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

A: Both parts maintain identical ROHS3 compliance and REACH unaffected status. No additional certifications or compliance modifications are required when substituting the 9DB403DFLF for the PI6C20400HEX.