CYI9530ZXCT Equivalent & Substitute Parts

Part Overview

The CYI9530ZXCT is a clock generator IC manufactured by Skyworks Solutions Inc., designed for PCI Express (PCIe) buffering applications. This device generates a 133.3MHz output from a crystal input using a 1:11 input-to-output ratio with integrated phase-locked loop (PLL) and divider/multiplier functionality. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

CYI9530ZXCT

Skyworks Solutions Inc.In Stock: 2264CYI9530ZXCT Datasheet

Current PartRFQ

SI5338C-B-GMR

Skyworks Solutions Inc.In Stock: 3114SI5338C-B-GMR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CYI9530ZXCT is determined by the following critical parameters:

Functional Requirements:

• PLL-based clock generation capability
• Divider and multiplier functionality
• Crystal input support
• Output frequency generation in the 133.3MHz range or higher

Electrical Compatibility:

• Supply voltage range must encompass or overlap with 3.135V ~ 3.465V
• Output type must support LVCMOS or compatible logic levels
• Operating temperature range must cover or exceed 0°C ~ 70°C

Physical Constraints:

• Surface mount packaging
• Pin count and footprint compatibility with system design

The SI5338C-B-GMR qualifies as a substitute based on its PLL architecture, programmable divider/multiplier functionality, support for crystal inputs, and output capability exceeding the required 133.3MHz maximum frequency. The wider supply voltage range (1.71V ~ 3.63V) and extended operating temperature (-40°C ~ 85°C) provide additional design margin.

Parameter Comparison

Engineering Selection Recommendations

The SI5338C-B-GMR is an active product from the same manufacturer, eliminating obsolescence risk associated with the CYI9530ZXCT. Both devices share identical manufacturer lineage and equivalent regulatory compliance (ECCN: EAR99, HTSUS: 8542.39.0001).

The SI5338C-B-GMR provides superior performance margins: maximum frequency of 200MHz exceeds the CYI9530ZXCT requirement of 133.3MHz, and the extended supply voltage range (1.71V ~ 3.63V) accommodates the original specification of 3.135V ~ 3.465V. The wider operating temperature range (-40°C ~ 85°C) supports applications beyond the original 0°C ~ 70°C specification.

Package differences require PCB layout modification. The SI5338C-B-GMR uses a 24-pin QFN package versus the 48-pin TFSOP of the original part. This reduction in pin count reflects the programmable architecture of the substitute, which consolidates functionality through I2C configuration rather than fixed pin-strapping.

Frequently Asked Questions (FAQ)

Q: Can the SI5338C-B-GMR directly replace the CYI9530ZXCT without PCB modification?

A: No. The SI5338C-B-GMR uses a 24-VFQFN package while the CYI9530ZXCT uses a 48-TFSOP package. PCB layout redesign is required. However, the functional capability of the SI5338C-B-GMR supports the original application requirements.

Q: What are the key functional differences between these parts?

A: Both devices provide PLL-based clock generation with divider/multiplier capability and crystal input support. The SI5338C-B-GMR adds programmability via I2C interface and supports multiple input/output formats (LVDS, LVPECL, HSTL, HCSL, SSTL) beyond the LVCMOS output of the CYI9530ZXCT. The SI5338C-B-GMR maximum frequency of 200MHz exceeds the CYI9530ZXCT specification of 133.3MHz.

Q: Are there supply voltage compatibility concerns?

A: The SI5338C-B-GMR supply voltage range (1.71V ~ 3.63V) fully encompasses the CYI9530ZXCT range (3.135V ~ 3.465V). No voltage compatibility issues exist for applications operating within the original specification.

Q: What is the impact of the different Moisture Sensitivity Levels (MSL)?

A: The CYI9530ZXCT has MSL 1 (unlimited shelf life), while the SI5338C-B-GMR has MSL 2 (1-year shelf life). MSL 2 components require controlled storage conditions and have a defined floor life. Procurement and inventory management procedures must account for this difference.

Q: Does the extended operating temperature range of the SI5338C-B-GMR affect compatibility?

A: The SI5338C-B-GMR operating range (-40°C ~ 85°C) exceeds the CYI9530ZXCT range (0°C ~ 70°C). This provides additional design margin and supports applications with wider temperature requirements. No compatibility issues arise from this specification difference.