PI6C20400HE Equivalent & Substitute Parts

Part Overview

The PI6C20400HE is a PCI Express (PCIe) Clock Buffer/Driver IC manufactured by Diodes Incorporated, designed to distribute differential clock signals in high-speed digital systems. This device operates at up to 100MHz with a 1:4 input-to-output ratio, featuring HCSL differential input and output signaling. The product is currently obsolete, making identification of compatible substitute parts essential for system redesign, legacy system maintenance, and component procurement planning.

Substiute Parts

PI6C20400HE

Diodes IncorporatedIn Stock: 2994PI6C20400HE Datasheet

Current PartRFQ

9DB403DFLF

Renesas Electronics CorporationIn Stock: 11909DB403DFLF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI6C20400HE is determined by the following critical parameters:

Mechanical Compatibility:

• Package type: 28-SSOP with identical 0.209" (5.30mm) width
• Surface mount configuration
• Pin count and footprint alignment

Electrical Compatibility:

• Supply voltage range: 3.135V ~ 3.465V (must overlap or be contained within this range)
• Differential input signaling: HCSL
• Differential output signaling: HCSL or HCSL-compatible
• Input-to-output ratio: 1:4
• PLL functionality: Required
• PCIe application support

Regulatory & Environmental:

• RoHS3 compliance
• Operating temperature range: 0°C ~ 70°C minimum
• Moisture sensitivity level: 1 (Unlimited)

The 9DB403DFLF qualifies as a direct substitute based on these parameters, with the additional capability of supporting higher frequency operation (400MHz vs. 100MHz).

Parameter Comparison

Engineering Selection Recommendations

The 9DB403DFLF is a qualified substitute for the PI6C20400HE based on the following engineering criteria:

Mechanical Fit: Both devices use identical 28-SSOP packaging with matching footprints, enabling direct PCB layout compatibility without redesign.

Electrical Equivalence: The substitute maintains identical supply voltage range (3.135V ~ 3.465V), operating temperature range (0°C ~ 70°C), input/output signaling (HCSL differential), and 1:4 multiplexing ratio. The PLL functionality is preserved in both devices.

Performance Enhancement: The 9DB403DFLF operates at 400MHz maximum frequency, exceeding the PI6C20400HE specification of 100MHz. This provides additional performance margin for PCIe clock distribution applications without introducing compatibility issues.

Regulatory Compliance: Both devices maintain ROHS3 compliance and identical moisture sensitivity levels, ensuring equivalent environmental and regulatory standing.

Product Availability: The 9DB403DFLF is in active production status with confirmed inventory availability, addressing the obsolescence of the original part.

Frequently Asked Questions (FAQ)

Q: Can the 9DB403DFLF directly replace the PI6C20400HE without PCB modifications?

A: Yes. Both devices use the 28-SSOP package with identical 0.209" (5.30mm) width and pin configuration, enabling direct footprint compatibility. No PCB layout changes are required.

Q: Are the supply voltage requirements identical?

A: Yes. Both the PI6C20400HE and 9DB403DFLF operate within the same supply voltage range of 3.135V ~ 3.465V. Existing power supply designs require no modification.

Q: What is the significance of the higher 400MHz frequency rating on the 9DB403DFLF?

A: The 9DB403DFLF's 400MHz maximum frequency specification exceeds the PI6C20400HE's 100MHz rating. This provides additional performance headroom for PCIe clock distribution. At the PI6C20400HE's original operating frequency, the substitute operates well within its rated specifications.

Q: Are the differential input and output signaling formats compatible?

A: Yes. Both devices support HCSL differential input signaling. The PI6C20400HE outputs HCSL differential signals, while the 9DB403DFLF supports both HCSL and LVDS differential output formats. HCSL output mode ensures full compatibility.

Q: Do both devices include PLL functionality?

A: Yes. Both the PI6C20400HE and 9DB403DFLF include integrated PLL circuits for clock distribution and signal conditioning in PCIe applications.

Q: What is the operating temperature range for both devices?

A: Both devices operate across the identical temperature range of 0°C to 70°C, ensuring equivalent thermal performance characteristics.

Q: Is the 1:4 input-to-output ratio maintained in the substitute?

A: Yes. The 9DB403DFLF maintains the 1:4 multiplexing ratio, distributing one differential input clock to four differential outputs, matching the PI6C20400HE functionality.

Q: Are there any compliance or certification differences?

A: No. Both devices are ROHS3 compliant with identical moisture sensitivity levels (MSL 1 - Unlimited), ensuring equivalent regulatory and environmental standing.