ICS557M-01 Equivalent & Substitute Parts

Part Overview

The ICS557M-01 is a PCI Express (PCIe) Clock/Frequency Generator IC manufactured by Renesas Electronics Corporation. This 8-SOIC surface mount device generates a 100MHz clock output with HCSL and LVDS output options, designed for PCIe applications requiring precise timing signals. The ICS557M-01 is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

ICS557M-01

Renesas Electronics CorporationIn Stock: 1041ICS557M-01 Datasheet

Current PartRFQ

557M-01LF

Renesas Electronics CorporationIn Stock: 3849557M-01LF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ICS557M-01 is determined by strict alignment with the following electrical and mechanical parameters:

• Frequency Output: 100MHz maximum frequency
• Output Signaling: HCSL and LVDS output compatibility
• Supply Voltage Range: 3.135V ~ 3.465V
• Package Type: 8-SOIC form factor with 0.154" (3.90mm) width
• Circuit Configuration: Single circuit with 1:1 input-to-output ratio
• PLL Functionality: Integrated Phase-Locked Loop required
• Application Domain: PCI Express (PCIe) clock generation

The substitute part 557M-01LF meets all specified electrical and mechanical parameters, maintaining functional equivalence with the obsolete ICS557M-01.

Parameter Comparison

Engineering Selection Recommendations

The 557M-01LF serves as the direct functional equivalent to the obsolete ICS557M-01. Selection of the 557M-01LF is supported by the following engineering considerations:

Product Status: The ICS557M-01 is obsolete, while the 557M-01LF maintains active product status with current manufacturing availability (3774 units in stock versus 993 units for the obsolete variant).

Regulatory Compliance: The 557M-01LF achieves ROHS3 compliance, whereas the ICS557M-01 is RoHS non-compliant. Both parts maintain REACH Unaffected status and EAR99 export classification.

Electrical and Mechanical Equivalence: All critical parameters—frequency output, supply voltage, operating temperature range, package geometry, and signaling standards—are identical between the two parts.

Packaging: The 557M-01LF is supplied in tube packaging, whereas the ICS557M-01 packaging specification was not provided. Both utilize the same 8-SOIC form factor suitable for surface mount assembly.

Frequently Asked Questions (FAQ)

Q: Can the 557M-01LF directly replace the ICS557M-01 in existing PCB designs?

A: Yes. The 557M-01LF is electrically and mechanically equivalent to the ICS557M-01. Both devices share identical pin configurations, package dimensions (8-SOIC, 0.154" width), supply voltage requirements (3.135V ~ 3.465V), and output specifications (HCSL and LVDS at 100MHz). Direct substitution on the PCB is feasible without design modification.

Q: What is the primary reason for substituting the ICS557M-01?

A: The ICS557M-01 is classified as obsolete. The 557M-01LF is the active equivalent part from Renesas Electronics Corporation, ensuring continued component availability and manufacturing support.

Q: Are there compliance differences between these parts?

A: Yes. The 557M-01LF is ROHS3 compliant, while the ICS557M-01 is RoHS non-compliant. For applications subject to RoHS regulations, the 557M-01LF is the required selection. Both parts maintain identical REACH and export classification status.

Q: Do the output signaling standards differ between these parts?

A: No. Both the ICS557M-01 and 557M-01LF provide identical HCSL and LVDS output options at 100MHz, maintaining full compatibility with PCIe clock distribution requirements.

Q: Is the 557M-01LF available in the same packaging format?

A: Both parts use the 8-SOIC surface mount package with identical dimensions. The 557M-01LF is supplied in tube packaging. Verify packaging requirements for your procurement and assembly processes.