ICS557M-01T PCI Express Clock Generator - Equivalent & Substitute Parts

Part Overview

The ICS557M-01T is a PCI Express (PCIe) Clock/Frequency Generator IC manufactured by Renesas Electronics Corporation. This 100MHz single-output clock source operates in the 8-SOIC package and generates HCSL and LVDS differential outputs from clock or crystal inputs. The device is classified as obsolete, making identification of active substitute parts essential for ongoing system design and procurement. Locating functionally equivalent alternatives ensures design continuity and supply chain reliability for applications requiring PCIe clock generation at 100MHz with identical electrical and mechanical specifications.

Substiute Parts

ICS557M-01T

Renesas Electronics CorporationIn Stock: 982ICS557M-01T Datasheet

Current PartRFQ

557M-01LFT

Renesas Electronics CorporationIn Stock: 8640557M-01LFT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ICS557M-01T is determined by strict equivalence across the following critical parameters:

• Frequency specification: Maximum 100MHz output frequency
• Output configuration: Single output with HCSL and LVDS differential capability
• Input interface: Clock or crystal input support
• Electrical characteristics: Supply voltage range 3.135V ~ 3.465V and operating temperature 0°C ~ 70°C
• Package format: 8-SOIC surface mount package with 3.90mm width
• Functional architecture: PLL-based clock generation with 1:1 input:output ratio and No/Yes differential input:output capability

The substitute part 557M-01LFT maintains identical electrical and mechanical specifications while offering improved product status and compliance certifications. Both parts share the same base product number (557M) and are manufactured by Renesas Electronics Corporation, confirming functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

The 557M-01LFT is the direct functional equivalent of the ICS557M-01T. Selection between these parts is determined by product lifecycle and regulatory requirements:

ICS557M-01T is classified as obsolete and carries RoHS non-compliant status. This part is suitable only for legacy system maintenance or applications where existing inventory is available and regulatory compliance is not required.

557M-01LFT is an active product with ROHS3 compliance certification. This part is the appropriate selection for new designs, production systems, and applications subject to environmental or regulatory compliance mandates. The Tape & Reel packaging format supports high-volume manufacturing workflows. Inventory availability (8538 pieces) ensures supply chain continuity.

Both parts are REACH Unaffected and classified under ECCN EAR99 with identical HTSUS coding (8542.39.0001), confirming regulatory equivalence.

Frequently Asked Questions (FAQ)

Q: Can the 557M-01LFT directly replace the ICS557M-01T in existing designs?

A: Yes. Both parts are electrically and mechanically identical across all specified parameters: 100MHz frequency, HCSL/LVDS output, 8-SOIC package, 3.135V ~ 3.465V supply range, and 0°C ~ 70°C operating temperature. Pin-for-pin compatibility and functional equivalence are confirmed.

Q: What is the difference between the tube and Tape & Reel packaging formats?

A: Tube packaging (ICS557M-01T) is used for lower-volume or manual assembly applications. Tape & Reel packaging (557M-01LFT) is designed for automated pick-and-place manufacturing and high-volume production. Both formats contain identical die and electrical specifications.

Q: Why is the ICS557M-01T classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued active production and support. The 557M-01LFT represents the current active product line from Renesas Electronics Corporation for this clock generator function.

Q: Does RoHS3 compliance affect electrical performance?

A: No. RoHS3 compliance relates to material composition and environmental standards, not electrical characteristics. The 557M-01LFT maintains identical electrical performance to the ICS557M-01T while meeting modern environmental regulations.

Q: Are both parts suitable for PCIe applications?

A: Yes. Both the ICS557M-01T and 557M-01LFT are specified for PCI Express (PCIe) clock generation with 100MHz output frequency, HCSL and LVDS differential outputs, and PLL-based frequency synthesis.