Equivalent & Substitute Parts for 87993AYILF

Part Overview

The 87993AYILF 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 87993AYILF has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure availability for new production runs, repairs, and system upgrades.

Substiute Parts

87993AYILF

Renesas Electronics CorporationIn Stock: 103187993AYILF 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

Substitute parts for the 87993AYILF are identified based on the following critical parameters that determine functional compatibility:

Core Substitution Criteria:

• PLL functionality with bypass capability
• Support for differential input and output
• Operating temperature range: -40°C ~ 85°C
• Supply voltage compatibility within specified range
• Surface mount technology
• Renesas Electronics Corporation manufacture

Substitute Parts Identified:

• 8T49N241-998NLGI
• 8T49N242-998NLGI

Both substitute parts are active-status devices from Renesas Electronics Corporation's FemtoClock® NG series, providing enhanced frequency capability (1GHz maximum) while maintaining PLL with bypass functionality and differential signal support required for clock distribution applications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The 87993AYILF is obsolete. The substitute parts 8T49N241-998NLGI and 8T49N242-998NLGI are active-status devices, ensuring long-term availability and continued manufacturing support from Renesas Electronics Corporation.

Compliance and Certifications: Both substitute parts carry ROHS3 compliance certification, meeting current environmental and regulatory requirements. The original 87993AYILF does not specify RoHS status. All three parts maintain REACH Unaffected status and EAR99 ECCN classification.

Functional Capability: The substitute parts provide enhanced maximum frequency capability (1GHz versus 250MHz), broader input standard support (addition of LVCMOS and Crystal input options), and expanded output standard options (HCSL, LVCMOS, LVDS, LVPECL versus LVPECL only). These enhancements provide design flexibility for current and future applications.

Package Consideration: Substitution requires PCB layout modification. The 87993AYILF uses 32-LQFP (7x7mm) packaging, while substitute parts use 40-VFQFN (6x6mm) with exposed pad. Pin count increases from 32 to 40, and footprint dimensions differ. Design review and PCB re-layout are necessary.

Supply Voltage Range: The substitute parts support a wider supply voltage range (2.375V ~ 3.465V) compared to the original part (3.135V ~ 3.465V), providing additional design margin in lower voltage applications.

Frequently Asked Questions (FAQ)

Q: Can 8T49N241-998NLGI and 8T49N242-998NLGI be used interchangeably with 87993AYILF?

A: Both parts meet the core functional requirements: PLL with bypass, differential input/output capability, -40°C ~ 85°C operating temperature, and surface mount technology. However, package differences (32-LQFP versus 40-VFQFN) require PCB re-design. Pin assignments and signal routing must be verified against device datasheets before implementation.

Q: What are the key differences between 8T49N241-998NLGI and 8T49N242-998NLGI?

A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is the base product number designation (8T49N241 versus 8T49N242). Inventory availability differs: 8T49N241-998NLGI has 3570 units in stock, while 8T49N242-998NLGI has 1211 units in stock.

Q: Does the higher maximum frequency (1GHz) of substitute parts affect compatibility?

A: The substitute parts' 1GHz maximum frequency capability exceeds the 87993AYILF's 250MHz specification. For applications operating at or below 250MHz, this enhanced capability does not introduce incompatibility. Circuit design must remain within the original 250MHz operating frequency to maintain system performance characteristics.

Q: Are there input standard compatibility concerns?

A: The 87993AYILF supports HCSL, LVDS, LVHSTL, LVPECL, and SSTL inputs. Substitute parts support LVCMOS, LVDS, LVHSTL, LVPECL, and Crystal inputs. LVDS, LVHSTL, and LVPECL are common to both. If the original design uses HCSL or SSTL input exclusively, input signal conditioning may be required for substitute parts.

Q: What is the impact of package change on design implementation?

A: The 87993AYILF uses 32-pin LQFP packaging (7x7mm). Substitute parts use 40-pin VFQFN packaging (6x6mm) with exposed pad. This requires: PCB footprint redesign, signal routing modification, thermal management review for the exposed pad, and verification of pin assignments against device datasheets. Full schematic and layout review is mandatory.

Q: Are moisture sensitivity levels compatible?

A: All three parts carry MSL 3 (168 Hours) rating, indicating identical moisture sensitivity handling requirements. Storage, handling, and reflow procedures remain consistent across parts.