ICS557G-05A Equivalent & Substitute Parts

Part Overview

The ICS557G-05A 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, supporting HCSL and LVDS output formats. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

ICS557G-05A

Renesas Electronics CorporationIn Stock: 864ICS557G-05A Datasheet

Current PartRFQ

557G-05ALF

Renesas Electronics CorporationIn Stock: 1505557G-05ALF 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-05A are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Maximum frequency: 200MHz
• Output format: HCSL and LVDS support
• Input:Output ratio: 1:4
• Package type: 20-TSSOP
• Supply voltage range: 3.135V ~ 3.465V
• Mounting type: Surface Mount
• PLL functionality: Yes
• Number of circuits: 1

Substitution Categories:

1. Direct Manufacturer Equivalent (557G-05ALF): Same base product number (557G) from Renesas Electronics Corporation with identical electrical specifications. Differs only in product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. non-compliant).

2. Cross-Manufacturer Upgrades (PI6C557-05QLE, PI6C557-05QLEX): Diodes Incorporated alternatives with identical electrical parameters and package specifications. These parts extend the operating temperature range to -40°C ~ 85°C and support both Ethernet and PCI Express applications. Packaging differs between tube (PI6C557-05QLE) and tape & reel (PI6C557-05QLEX) formats.

Parameter Comparison

Engineering Selection Recommendations

For Obsolete Part Replacement (ICS557G-05A):

The 557G-05ALF is the direct equivalent from Renesas Electronics Corporation. This part maintains identical electrical specifications and operating temperature range while offering the advantage of Active product status and ROHS3 compliance. Selection of this part is appropriate for applications requiring continuity with the original Renesas platform.

For Extended Temperature Range Applications:

The PI6C557-05QLE and PI6C557-05QLEX from Diodes Incorporated provide identical electrical functionality with an extended operating temperature range of -40°C ~ 85°C, compared to the 0°C ~ 70°C range of the original part. These parts are suitable for applications requiring broader temperature performance and are ROHS3 compliant. The PI6C557-05QLEX variant in tape & reel packaging is optimized for high-volume manufacturing environments, while the PI6C557-05QLE in tube packaging is suitable for lower-volume or prototype applications.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant and REACH unaffected, addressing regulatory requirements that may not be met by the obsolete ICS557G-05A.

Frequently Asked Questions (FAQ)

Q: Can the 557G-05ALF directly replace the ICS557G-05A in existing designs?

A: Yes. The 557G-05ALF maintains identical electrical specifications, supply voltage range, frequency output, and package configuration. The primary differences are product status (Active vs. Obsolete) and RoHS compliance. No circuit modifications are required.

Q: What is the advantage of using PI6C557-05QLE or PI6C557-05QLEX over the 557G-05ALF?

A: The Diodes Incorporated parts extend the operating temperature range to -40°C ~ 85°C, compared to 0°C ~ 70°C for the Renesas parts. This broader temperature specification is beneficial for applications operating in extreme thermal environments. Both are ROHS3 compliant and Active products.

Q: What is the difference between PI6C557-05QLE and PI6C557-05QLEX?

A: Both parts are electrically identical. The difference is packaging format: PI6C557-05QLE is supplied in tube packaging, while PI6C557-05QLEX is supplied in tape & reel format. Tape & reel packaging is standard for automated assembly processes in high-volume manufacturing.

Q: Are all substitute parts available in the same 20-TSSOP package?

A: Yes. All substitute parts use the 20-TSSOP (0.173", 4.40mm Width) package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

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

A: Yes. All substitute parts support Clock and Crystal inputs, with HCSL and LVDS outputs, maintaining functional compatibility with the original ICS557G-05A design.

Q: What is the significance of the 1:4 input:output ratio?

A: This ratio indicates that the device accepts a single clock input and generates four differential output pairs. All substitute parts maintain this 1:4 distribution ratio.

Q: Are there any differences in PLL functionality between the parts?

A: No. All parts listed include PLL (Phase-Locked Loop) functionality for clock generation and frequency synthesis.