SI5347A-B-GMR Equivalent & Substitute Parts

Part Overview

The SI5347A-B-GMR is a Clock/Timing IC buffer with integrated PLL functionality, manufactured by Skyworks Solutions Inc. This device operates at frequencies up to 712.5MHz and supports multiple input and output signal standards including LVCMOS, LVDS, LVPECL, and CML. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

SI5347A-B-GMR

Skyworks Solutions Inc.In Stock: 2299SI5347A-B-GMR Datasheet

Current PartRFQ

SI5347A-D-GMR

Skyworks Solutions Inc.In Stock: 2119SI5347A-D-GMR Datasheet

DirectRFQ

SI5397A-D-GMR

Skyworks Solutions Inc.In Stock: 778SI5397A-D-GMR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SI5347A-B-GMR are identified based on strict alignment with the following critical parameters:

• Identical package form factor: 64-QFN (9x9) with exposed pad
• Compatible signal input/output standards: LVCMOS, LVDS, LVPECL, CML, HCSL support
• Matching PLL functionality and differential input/output capability
• Operating temperature range: -40°C ~ 85°C
• Supply voltage compatibility within specified ranges
• Surface mount technology
• Identical MSL rating and export compliance codes

The SI5347A-B-GMR has one direct substitute and one similar alternative based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

SI5347A-D-GMR (Direct Substitute)

The SI5347A-D-GMR shares the same base product number (SI5347) and is manufactured by Skyworks Solutions Inc. with active product status. This part is the primary direct substitute for the obsolete SI5347A-B-GMR. Both devices maintain identical MSL ratings and export compliance designations (EAR99, HTSUS 8542.39.0001). The SI5347A-D-GMR is available in Tape & Reel packaging format with 2040 units in current inventory.

SI5397A-D-GMR (Similar Alternative)

The SI5397A-D-GMR is a Clock Multiplier and Jitter Attenuator IC from the DSPLL® series, also manufactured by Skyworks Solutions Inc. with active product status. This device operates at 720MHz maximum frequency, marginally exceeding the SI5347A-B-GMR specification of 712.5MHz. The SI5397A-D-GMR maintains identical package form factor (64-QFN 9x9), differential input/output capability, and supports the same output signal standards (CML, HCSL, LVCMOS, LVDS, LVPECL). Operating temperature range and MSL rating are identical. The input standard support differs, with SI5397A-D-GMR limited to LVCMOS and Crystal inputs. Supply voltage ranges show two discrete bands (1.71V ~ 1.89V and 3.14V ~ 3.47V) compared to the continuous range of the original part. This device is suitable where input signal flexibility is not a primary requirement and the higher frequency capability is acceptable.

Frequently Asked Questions (FAQ)

Q: Can SI5347A-D-GMR be used as a direct replacement for SI5347A-B-GMR?

A: SI5347A-D-GMR is the designated direct substitute. Both parts share the same base product number and manufacturer. The SI5347A-D-GMR is active in production, addressing the obsolescence of the SI5347A-B-GMR. Verify that your application does not depend on specific parametric data not provided in the substitute documentation.

Q: What are the key differences between SI5347A-D-GMR and SI5397A-D-GMR?

A: SI5347A-D-GMR is a direct substitute with the same base product number. SI5397A-D-GMR is a similar alternative with different input standard support (LVCMOS and Crystal only versus LVCMOS, LVDS, LVPECL, and Crystal). The SI5397A-D-GMR operates at 720MHz versus 712.5MHz and includes jitter attenuation functionality. Supply voltage ranges differ between the two devices.

Q: Are the package dimensions identical between all three parts?

A: All three parts use the 64-QFN (9x9) package with exposed pad configuration. This ensures mechanical and thermal compatibility in existing PCB layouts.

Q: What is the significance of the MSL rating for these parts?

A: All three parts carry MSL rating 2 with a 1-year floor life. This indicates identical moisture sensitivity and storage requirements. Parts must be stored in controlled humidity environments and baked according to IPC standards before reflow soldering.

Q: Can SI5397A-D-GMR be used if my application requires LVDS or LVPECL inputs?

A: No. SI5397A-D-GMR supports only LVCMOS and Crystal inputs. If your design requires LVDS or LVPECL input capability, SI5347A-D-GMR is the appropriate substitute, as it maintains full input standard compatibility with the original SI5347A-B-GMR.

Q: Are there supply voltage compatibility concerns when substituting?

A: SI5347A-B-GMR operates across a continuous supply voltage range of 1.71V ~ 3.47V. SI5397A-D-GMR operates across two discrete bands: 1.71V ~ 1.89V and 3.14V ~ 3.47V. If your application uses supply voltages between 1.89V and 3.14V, SI5397A-D-GMR is not suitable. SI5347A-D-GMR is recommended for such applications.