ICS557G-05AT Equivalent & Substitute Parts

Part Overview

The ICS557G-05AT is a PCI Express (PCIe) Spread Spectrum Clock Generator and Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation. This 20-TSSOP surface mount device generates 200MHz clock signals with quad differential outputs for PCIe applications. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs. Substitute parts must maintain electrical compatibility across frequency, voltage supply, output types, and package specifications.

Substiute Parts

ICS557G-05AT

Renesas Electronics CorporationIn Stock: 866ICS557G-05AT Datasheet

Current PartRFQ

557G-05ALFT

Renesas Electronics CorporationIn Stock: 4353557G-05ALFT Datasheet

DirectRFQ

PI6C557-05QLE

Diodes IncorporatedIn Stock: 1822PI6C557-05QLE Datasheet

UpgradeRFQ

PI6C557-05QLEX

Diodes IncorporatedIn Stock: 2071PI6C557-05QLEX Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ICS557G-05AT are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Maximum frequency: 200MHz
• Supply voltage range: 3.135V ~ 3.465V
• Output configuration: HCSL and LVDS differential outputs
• Input types: Clock and Crystal inputs
• Input:Output ratio: 1:4
• Package type: 20-TSSOP surface mount
• Number of circuits: 1

Substitution Categories:

1. Direct Substitute (Same Manufacturer): 557G-05ALFT is a Renesas Electronics Corporation part with identical electrical specifications and 20-TSSOP packaging. This part differs only in product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. non-compliant).

2. Upgrade Substitutes (Alternative Manufacturer): PI6C557-05QLE and PI6C557-05QLEX are manufactured by Diodes Incorporated and meet all electrical parameters. These parts offer extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C) and ROHS3 compliance. Packaging differs in format (Tube vs. Tape & Reel) but maintains 20-TSSOP case specification.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Same Manufacturer, Active Status): Select 557G-05ALFT when maintaining Renesas Electronics sourcing is required. This part provides identical electrical performance with the advantage of active product status and ROHS3 compliance. Operating temperature range remains 0°C ~ 70°C.

For Extended Temperature Range and Compliance: Select PI6C557-05QLE or PI6C557-05QLEX when designs require extended operating temperature (-40°C ~ 85°C) and ROHS3 compliance. Both Diodes Incorporated parts meet all electrical specifications. PI6C557-05QLEX in Tape & Reel format supports high-volume manufacturing; PI6C557-05QLE in Tube format supports lower-volume or prototype applications.

Compliance Considerations: All substitute parts maintain REACH Unaffected and EAR99 ECCN classifications. RoHS compliance improves from non-compliant (original) to ROHS3 Compliant (all substitutes). Moisture Sensitivity Level remains 1 (Unlimited) across all options.

Frequently Asked Questions (FAQ)

Q: Can PI6C557-05QLE and PI6C557-05QLEX be used interchangeably with ICS557G-05AT?

A: Yes, both Diodes Incorporated parts are electrically equivalent. They maintain identical frequency (200MHz), supply voltage (3.135V ~ 3.465V), output types (HCSL, LVDS), and 20-TSSOP package specification. The primary differences are extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C) and packaging format (Tube vs. Tape & Reel).

Q: What is the difference between 557G-05ALFT and ICS557G-05AT?

A: Both are Renesas Electronics parts with identical electrical specifications and 20-TSSOP packaging. The 557G-05ALFT is an active product with ROHS3 compliance, while ICS557G-05AT is obsolete and RoHS non-compliant. Substitution is direct for applications within the 0°C ~ 70°C operating temperature range.

Q: Does the input type difference (Clock, Crystal vs. HCSL, Crystal) affect substitution?

A: The Diodes Incorporated parts (PI6C557-05QLE and PI6C557-05QLEX) accept HCSL input instead of generic Clock input. Both support Crystal input. This represents a functional enhancement rather than a limitation, as HCSL is a defined differential signal standard compatible with PCIe clock generation applications.

Q: Which packaging format should be selected for production?

A: PI6C557-05QLEX (Tape & Reel) is optimized for automated assembly and high-volume production. PI6C557-05QLE (Tube) is suitable for lower-volume builds or prototype development. Both maintain identical electrical performance and 20-TSSOP case dimensions.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts (557G-05ALFT, PI6C557-05QLE, PI6C557-05QLEX) are ROHS3 Compliant. The original ICS557G-05AT is RoHS non-compliant. Substitution improves regulatory compliance for new designs and ongoing production.