SL28EB742ALI Equivalent & Substitute Parts

Part Overview

The SL28EB742ALI is an Intel CPU Servers Clock/Frequency Generator IC manufactured by Skyworks Solutions Inc. This device generates a 100MHz clock output from a crystal or clock input, designed specifically for Intel Cedarview CPU server applications. The part is packaged in a 56-QFN (8x8) surface mount configuration with an exposed pad.

This part is classified as Obsolete. Finding equivalent and substitute parts is necessary to support legacy system maintenance, design updates, and supply chain continuity when original inventory becomes unavailable.

Substiute Parts

SL28EB742ALI

Skyworks Solutions Inc.In Stock: 2012SL28EB742ALI Datasheet

Current PartRFQ

SI5332H-D-GM3

Skyworks Solutions Inc.In Stock: 1329SI5332H-D-GM3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL28EB742ALI is determined by the following critical parameters:

• Manufacturer: Skyworks Solutions Inc. (same manufacturer ensures design compatibility and support)
• Category: Clock/Timing (functional equivalence)
• PLL Capability: Yes (required for frequency generation)
• Input/Output Configuration: Clock or Crystal input with Clock output capability
• Number of Circuits: 1 (single channel operation)
• Frequency Range: Must support or exceed 100MHz maximum output
• Supply Voltage Compatibility: Operating range must overlap with 3.13V ~ 3.46V
• Operating Temperature Range: Must support -40°C ~ 85°C
• Mounting Type: Surface Mount (PCB integration compatibility)

The SI5332H-D-GM3 qualifies as a substitute based on these parameters. While it operates at a higher maximum frequency (200MHz) and uses a different package format (48-TFLGA vs. 56-VFQFN), it maintains functional equivalence through PLL-based clock generation, compatible supply voltage range, matching temperature specifications, and surface mount technology.

Parameter Comparison

Engineering Selection Recommendations

The SI5332H-D-GM3 is a functionally equivalent substitute for the obsolete SL28EB742ALI based on the following engineering criteria:

Compliance and Status: The SI5332H-D-GM3 is in Active production status, ensuring long-term availability and manufacturer support. Both parts carry identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications, maintaining regulatory compliance for export and tariff purposes.

Electrical Compatibility: The SI5332H-D-GM3 supply voltage range (1.71V ~ 3.63V) fully encompasses the SL28EB742ALI requirement (3.13V ~ 3.46V). Both devices operate across the identical temperature range (-40°C ~ 85°C), ensuring thermal compatibility in legacy server environments.

Functional Equivalence: Both parts feature PLL-based clock generation with single-circuit architecture. The SI5332H-D-GM3 supports crystal input, matching the primary input method of the original part. The substitute's maximum frequency of 200MHz exceeds the 100MHz requirement, providing operational margin.

Physical Integration Consideration: The SI5332H-D-GM3 uses a 48-TFLGA package versus the original 56-VFQFN package. This difference requires PCB layout modification and footprint redesign. Pin-to-pin functional mapping must be verified against device datasheets before implementation.

Handling Requirements: The SI5332H-D-GM3 has MSL 3 (168 hours) versus MSL 2 (1 year) for the original part. This requires more stringent moisture control during storage and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the SI5332H-D-GM3 directly replace the SL28EB742ALI without PCB modification?

A: No. The SI5332H-D-GM3 uses a 48-TFLGA package while the SL28EB742ALI uses a 56-VFQFN package. Different pin counts and footprints require PCB redesign. Pin function mapping must be verified against both device datasheets.

Q: Are the electrical specifications compatible?

A: Yes, within the specified operating parameters. The SI5332H-D-GM3 supply voltage range (1.71V ~ 3.63V) encompasses the SL28EB742ALI requirement (3.13V ~ 3.46V). Both operate across -40°C ~ 85°C. The substitute's 200MHz maximum frequency exceeds the 100MHz requirement.

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

A: The SI5332H-D-GM3 (MSL 3, 168 hours) requires stricter moisture control compared to the SL28EB742ALI (MSL 2, 1 year). Storage must maintain lower humidity levels, and the time window between package opening and soldering is reduced. Assembly processes must account for this requirement.

Q: Why is the SI5332H-D-GM3 considered a substitute if the packages differ?

A: Substitution is based on functional and electrical equivalence, not physical form factor. Both devices perform the same clock generation function with compatible electrical specifications. Package differences are a design consideration, not a disqualifier for substitution.

Q: Is the SI5332H-D-GM3 available in the same quantity as the SL28EB742ALI?

A: The SI5332H-D-GM3 has 1227 pieces in stock versus 2000 pieces for the SL28EB742ALI. Availability should be verified with the supplier for production volume requirements.

Q: What certifications apply to both parts?

A: Both parts carry ECCN EAR99 and HTSUS 8542.39.0001 classifications, maintaining identical regulatory compliance for export control and tariff purposes.