SY898535LKY Clock Fanout Buffer Equivalent & Substitute Parts

Part Overview

The SY898535LKY is a Clock Fanout Buffer (Distribution) Multiplexer IC manufactured by Microchip Technology, designed for 2:4 clock distribution at frequencies up to 235 MHz. This active product operates with LVCMOS/LVTTL inputs and LVPECL outputs in a 20-TSSOP surface mount package. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1).

Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter range, enabling direct replacement in applications where the main part becomes unavailable or inventory constraints require alternative sourcing.

Substiute Parts

SY898535LKY

Microchip TechnologyIn Stock: 784SY898535LKY Datasheet

Current PartRFQ

NB3N853501EDTG

onsemiIn Stock: 888NB3N853501EDTG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SY898535LKY is determined by strict equivalence across the following critical parameters:

• Functional Type: Fanout Buffer (Distribution), Multiplexer with 2:4 ratio
• Package Compatibility: 20-TSSOP (0.173", 4.40mm Width) surface mount
• Signal Interface: LVCMOS/LVTTL input to LVPECL output
• Supply Voltage Range: 3.135V ~ 3.465V
• Operating Temperature Range: -40°C ~ 85°C
• Regulatory Compliance: ROHS3 Compliant, REACH Unaffected

The substitute part NB3N853501EDTG meets all mechanical and electrical compatibility requirements. The maximum frequency specification of the substitute (266 MHz) exceeds the main part requirement (235 MHz), maintaining full functional compatibility within the application's frequency envelope.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: SY898535LKY (Microchip Technology) is the recommended choice for new designs. The part maintains active product status, ensuring long-term availability and manufacturing support. ROHS3 compliance and unlimited MSL rating provide regulatory assurance and simplified handling requirements.

Substitute Selection: NB3N853501EDTG (onsemi) provides functional and mechanical equivalence for applications requiring immediate component sourcing or inventory supplementation. The substitute meets all electrical specifications and package requirements. However, the obsolete product status indicates limited future availability; this part is suitable for legacy system maintenance or short-term production runs only.

Compliance Basis: Both parts carry ROHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements. Selection between active and obsolete status should be driven by application lifecycle requirements and supply chain strategy.

Frequently Asked Questions (FAQ)

Q: Can NB3N853501EDTG directly replace SY898535LKY in existing designs?

A: Yes. Both parts share identical package geometry (20-TSSOP), supply voltage range (3.135V ~ 3.465V), operating temperature range (-40°C ~ 85°C), and signal interface specifications (LVCMOS/LVTTL input, LVPECL output). The 2:4 fanout ratio and functional topology are equivalent. No circuit modifications are required.

Q: What is the significance of the higher maximum frequency on the substitute part?

A: The NB3N853501EDTG specifies 266 MHz maximum frequency compared to 235 MHz for the SY898535LKY. This represents a performance margin above the main part specification. Applications operating at or below 235 MHz experience no functional difference; the substitute operates within its rated envelope with additional frequency headroom.

Q: Why is the substitute part listed as obsolete?

A: Obsolete status indicates the manufacturer (onsemi) has discontinued active production and support for the NB3N853501EDTG. Existing inventory may be available through authorized distributors, but long-term availability cannot be assured. For new designs or extended production runs, the active SY898535LKY is the appropriate selection.

Q: Are there any handling or storage differences between these parts?

A: No. Both parts carry MSL 1 (Unlimited) moisture sensitivity rating, eliminating special moisture control requirements during storage, handling, or assembly. Standard ESD precautions apply to both parts.

Q: What compliance certifications apply to both parts?

A: Both SY898535LKY and NB3N853501EDTG are ROHS3 compliant and REACH Unaffected. Both carry EAR99 export classification and HTSUS code 8542.39.0001. No additional compliance documentation is required for substitution.