Equivalent & Substitute Parts for MK2761AS

Part Overview

The MK2761AS is a Clock/Frequency Synthesizer IC manufactured by Renesas Electronics Corporation, designed for 27MHz frequency synthesis applications in 16-SOIC surface mount packaging. This component integrates a Phase-Locked Loop (PLL) with bypass capability, accepting clock or crystal inputs and delivering CMOS-level outputs with a 2:7 input-to-output frequency ratio.

The MK2761AS carries an Obsolete product status, making it necessary to identify functionally equivalent alternatives for new designs and ongoing production requirements. The substitute part MK2761ASLF provides direct functional equivalence while maintaining Active product status and improved compliance certifications.

Substiute Parts

MK2761AS

Renesas Electronics CorporationIn Stock: 768MK2761AS Datasheet

Current PartRFQ

MK2761ASLF

Renesas Electronics CorporationIn Stock: 1114MK2761ASLF Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MK2761AS is determined by strict equivalence across the following critical parameters:

• Frequency Synthesis Capability: Maximum frequency of 27MHz with 2:7 input-to-output ratio
• PLL Architecture: Integrated PLL with bypass functionality
• Input/Output Specifications: Clock or crystal input acceptance; CMOS output delivery
• Electrical Characteristics: 4.5V to 5.5V supply voltage range; 0°C to 70°C operating temperature
• Physical Form Factor: 16-SOIC surface mount package with 0.154" (3.90mm) width

The MK2761ASLF meets all substitution criteria as a direct equivalent, with identical electrical performance and package specifications. The primary distinction lies in product lifecycle status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The MK2761ASLF is the direct functional equivalent for the obsolete MK2761AS. Selection between these parts is determined by product lifecycle and regulatory compliance requirements:

MK2761ASLF is the preferred choice for new designs and ongoing production. This part maintains Active product status, ensuring long-term availability and supply chain stability. The MK2761ASLF carries ROHS3 compliance certification, meeting current environmental and hazardous substance restrictions applicable to electronic components in regulated markets.

MK2761AS remains suitable only for legacy system maintenance where component-level compatibility with existing assemblies is the primary constraint. The Obsolete status indicates discontinued manufacturing, with availability limited to existing inventory stocks.

Both parts share identical electrical performance, package specifications, and moisture sensitivity ratings, ensuring direct pin-for-pin and functional compatibility in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can MK2761ASLF be used as a direct replacement for MK2761AS in existing designs?

A: Yes. The MK2761ASLF provides complete functional equivalence with identical electrical specifications, frequency synthesis capability, and 16-SOIC package form factor. No circuit modifications are required for substitution.

Q: What is the primary difference between MK2761AS and MK2761ASLF?

A: The MK2761ASLF is the current production variant with Active product status and ROHS3 compliance certification. The MK2761AS is Obsolete and RoHS non-compliant. Electrical performance and package specifications are identical.

Q: Are there any supply chain considerations for these parts?

A: The MK2761AS is Obsolete with limited inventory availability. The MK2761ASLF maintains Active status with established supply channels. For new projects and production continuity, MK2761ASLF is the recommended selection.

Q: Do both parts require identical PCB layout and thermal management?

A: Yes. Both parts use the 16-SOIC surface mount package with identical pin configuration, spacing, and thermal characteristics. PCB layouts are fully interchangeable.

Q: What compliance certifications apply to each part?

A: MK2761ASLF carries ROHS3 compliance and REACH Unaffected status. MK2761AS is RoHS non-compliant but also carries REACH Unaffected status. Both parts have MSL rating of 1 (Unlimited moisture sensitivity).