SL18860DCT Equivalent & Substitute Parts

Part Overview

The SL18860DCT is a Clock Fanout Buffer (Distribution) IC manufactured by Skyworks Solutions Inc., designed for 1:3 clock distribution at frequencies up to 52 MHz. This device features LVCMOS input and output, operates across a supply voltage range of 1.7V to 3.65V, and is housed in a 10-WFDFN package.

The SL18860DCT is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this component.

Substiute Parts

SL18860DCT

Skyworks Solutions Inc.In Stock: 4587SL18860DCT Datasheet

Current PartRFQ

SI53307-B-GMR

Skyworks Solutions Inc.In Stock: 3692SI53307-B-GMR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the SL18860DCT is evaluated based on the following critical parameters:

• Manufacturer: Skyworks Solutions Inc. (same manufacturer preferred for design consistency)
• Type: Fanout Buffer (Distribution) functionality
• Supply Voltage Compatibility: Operating range must encompass or overlap with 1.7V ~ 3.65V
• Operating Temperature Range: Must support -40°C ~ 85°C
• Mounting Type: Surface Mount
• Signal Compatibility: Input and output signal types must be compatible with LVCMOS

The SI53307-B-GMR qualifies as a substitute based on these criteria. While it offers enhanced specifications (higher frequency capability, additional signal format support, and increased circuit complexity), it maintains functional compatibility within the defined electrical and thermal operating parameters.

Parameter Comparison

Engineering Selection Recommendations

The SI53307-B-GMR is an active product from the same manufacturer, providing a viable substitute for the obsolete SL18860DCT. Key considerations for selection:

Product Status: The SI53307-B-GMR is actively manufactured and supported, ensuring long-term availability and supply chain stability compared to the obsolete SL18860DCT.

Compliance: The SI53307-B-GMR is ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic components in most markets.

Electrical Compatibility: Both devices operate within overlapping supply voltage ranges (-40°C ~ 85°C) and support LVCMOS signal levels. The SI53307-B-GMR's expanded input/output signal format support (CML, HCSL, LVCMOS, LVDS, LVPECL) provides design flexibility without compromising LVCMOS compatibility.

Package Consideration: The SI53307-B-GMR uses a 16-VFQFN package versus the SL18860DCT's 10-WFDFN package. PCB layout modifications are required to accommodate the larger footprint and pin count.

Frequently Asked Questions (FAQ)

Q: Can the SI53307-B-GMR directly replace the SL18860DCT without design changes?

A: Electrical substitution is feasible due to overlapping supply voltage ranges and LVCMOS compatibility. However, the different package footprint (16-VFQFN vs. 10-WFDFN) and increased pin count (16 vs. 10) require PCB layout redesign and firmware/hardware reconfiguration to map the 2:4 ratio outputs to the original 1:3 application.

Q: What are the key differences in functionality between these parts?

A: The SL18860DCT provides 1:3 clock distribution at up to 52 MHz with LVCMOS signaling. The SI53307-B-GMR offers 2:4 distribution at up to 725 MHz with support for multiple signal formats (CML, HCSL, LVCMOS, LVDS, LVPECL). The SI53307-B-GMR includes multiplexer functionality, providing additional design capabilities.

Q: Are there supply chain advantages to using the SI53307-B-GMR?

A: Yes. The SI53307-B-GMR is an active product with current manufacturing support, whereas the SL18860DCT is obsolete. Active products typically have better long-term availability, documented support, and predictable pricing.

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

A: The SL18860DCT has MSL 1 (unlimited shelf life), while the SI53307-B-GMR has MSL 2 (1-year shelf life). MSL 2 components require controlled storage conditions and have a defined reflow window. Inventory management and handling procedures must account for this difference.

Q: Does the higher frequency capability of the SI53307-B-GMR affect my 52 MHz application?

A: No. The SI53307-B-GMR operates reliably at frequencies below its maximum specification of 725 MHz. Operating at 52 MHz is well within the device's capability and does not introduce performance concerns.