Equivalent & Substitute Parts for 87993AYILFT

Part Overview

The 87993AYILFT is a PLL Clock Driver IC manufactured by Renesas Electronics Corporation, designed for 250MHz clock distribution applications. This device features PLL functionality with bypass capability, supporting multiple input standards (HCSL, LVDS, LVHSTL, LVPECL, SSTL) and LVPECL output in a 32-LQFP package.

The 87993AYILFT has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this clock driver architecture.

Substiute Parts

87993AYILFT

Renesas Electronics CorporationIn Stock: 91087993AYILFT Datasheet

Current PartRFQ

8T49N241-998NLGI

Renesas Electronics CorporationIn Stock: 35878T49N241-998NLGI Datasheet

MFR RecommendedRFQ

8T49N242-998NLGI

Renesas Electronics CorporationIn Stock: 12428T49N242-998NLGI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 87993AYILFT is based on the following critical parameters that determine functional compatibility:

Core Substitution Criteria:

• PLL functionality with bypass capability
• Support for differential input and output signaling
• Operating temperature range: -40°C to 85°C
• Supply voltage compatibility within specified ranges
• Surface mount packaging with equivalent pin density and signal integrity
• REACH and export compliance alignment

The substitute parts 8T49N241-998NLGI and 8T49N242-998NLGI are Renesas Electronics FemtoClock® NG series devices that maintain PLL architecture with bypass, differential input/output capability, and compatible operating conditions. Both substitutes are active products with current manufacturing status, addressing the obsolescence of the 87993AYILFT while preserving core clock distribution functionality.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The 87993AYILFT is obsolete, while both 8T49N241-998NLGI and 8T49N242-998NLGI are active products with current manufacturing support from Renesas Electronics Corporation. Active product status ensures ongoing availability, technical support, and compliance with current regulatory requirements.

Compliance and Certifications: Both substitute parts maintain REACH Unaffected and EAR99 export classification alignment with the original part. The substitute parts additionally carry ROHS3 Compliant certification, meeting current environmental and hazardous substance restrictions.

Supply Chain Availability: Current inventory levels for substitute parts (3570 units for 8T49N241-998NLGI and 1211 units for 8T49N242-998NLGI) provide immediate availability compared to the obsolete 87993AYILFT.

Functional Capability: Both substitutes exceed the frequency specification of the original part (1GHz versus 250MHz maximum), supporting applications requiring higher clock distribution speeds. The substitutes maintain PLL with bypass architecture and differential signaling capability essential for clock driver applications.

Package Consideration: Substitution requires PCB layout modification due to package change from 32-LQFP (7x7mm) to 40-VFQFN (6x6mm) with exposed pad. Pin count increases from 32 to 40, necessitating schematic and layout redesign.

Frequently Asked Questions (FAQ)

Q: Can 8T49N241-998NLGI and 8T49N242-998NLGI be used interchangeably as substitutes for 87993AYILFT?

A: Both parts are functionally equivalent substitutes for the obsolete 87993AYILFT. Selection between the two should be based on specific application requirements and design constraints, as both maintain identical electrical specifications and package form factors.

Q: What are the key differences between the original part and the substitutes?

A: The primary differences are product status (obsolete versus active), maximum frequency capability (250MHz versus 1GHz), package type (32-LQFP versus 40-VFQFN), and output standard flexibility. The substitutes provide expanded output standard options (HCSL, LVCMOS, LVDS, LVPECL) compared to the original LVPECL-only output.

Q: Are there input standard compatibility considerations?

A: The original part supports HCSL, LVDS, LVHSTL, LVPECL, and SSTL inputs. The substitutes support LVCMOS, LVDS, LVHSTL, LVPECL, and Crystal inputs. Applications requiring HCSL or SSTL input must verify compatibility with the substitute's supported input standards.

Q: What supply voltage range considerations apply to substitution?

A: The original part operates at 3.135V to 3.465V. The substitutes operate at 2.375V to 3.465V, providing wider supply voltage tolerance. Existing 3.3V supply designs are compatible with both substitutes.

Q: Does package change affect design implementation?

A: Yes. The package change from 32-LQFP to 40-VFQFN requires PCB layout modification, including increased pin count accommodation and thermal management considerations for the exposed pad design. Schematic redesign is necessary to route additional signal paths.

Q: Are moisture sensitivity levels equivalent?

A: Yes. Both the original part and substitutes carry MSL 3 (168 Hours) classification, maintaining identical moisture handling and storage requirements.