MK5814CMLF Equivalent & Substitute Parts

Part Overview

The MK5814CMLF is a Clock Generator IC manufactured by Renesas Electronics Corporation, designed for 128MHz clock generation in 8-SOIC surface mount packaging. This component features a Phase-Locked Loop (PLL) with multiplier capability, accepting clock or crystal inputs and delivering LVCMOS outputs. The part is classified as Obsolete, making identification of suitable alternatives essential for ongoing system support and new design implementations where legacy component availability is constrained.

Substiute Parts

MK5814CMLF

Renesas Electronics CorporationIn Stock: 716MK5814CMLF Datasheet

Current PartRFQ

5P35021B-000NDGI

Renesas Electronics CorporationIn Stock: 9075P35021B-000NDGI Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MK5814CMLF is determined by the following critical parameters:

• Functional Type: Clock Generator with PLL capability
• Output Signal Standard: LVCMOS compatibility
• Frequency Range: Maximum operating frequency of 128MHz or higher
• Supply Voltage Compatibility: Overlap with 3V ~ 3.63V range
• Mounting Technology: Surface mount configuration
• Manufacturer Support: Active product status preferred for long-term availability

The substitute part 5P35021B-000NDGI meets these functional requirements while offering enhanced capabilities including higher maximum frequency (500MHz), broader supply voltage options, and extended temperature range. The substitute maintains LVCMOS output capability alongside additional output formats, ensuring compatibility with existing LVCMOS-based designs.

Parameter Comparison

Engineering Selection Recommendations

The 5P35021B-000NDGI serves as a functional equivalent for the obsolete MK5814CMLF based on the following engineering criteria:

Compliance & Certification: Both parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1), ensuring equivalent environmental and regulatory standing.

Functional Compatibility: The substitute retains LVCMOS output capability required for existing designs while providing extended frequency range (500MHz vs. 128MHz) and broader supply voltage support. The 3.135V ~ 3.465V range encompasses the original 3V ~ 3.63V specification.

Product Status: The transition from Obsolete to Active status ensures long-term component availability, supply chain stability, and manufacturer support for the substitute part.

Design Considerations: PCB layout modifications are required due to package change from 8-SOIC to 20-VFQFN. The substitute's extended operating temperature range (-40°C to 85°C vs. 0°C to 85°C) provides additional thermal margin for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the 5P35021B-000NDGI directly replace the MK5814CMLF without circuit modifications?

A: Functional replacement is possible for LVCMOS output applications. However, the package change from 8-SOIC to 20-VFQFN requires PCB redesign. Pin configuration and signal routing must be verified against manufacturer datasheets before implementation.

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

A: The MK5814CMLF operates at 3V ~ 3.63V. The 5P35021B-000NDGI supports multiple voltage rails: 1.71V ~ 1.89V, 2.375V ~ 2.625V, and 3.135V ~ 3.465V. The 3.135V ~ 3.465V range overlaps with the original specification, enabling direct voltage compatibility for 3.3V systems.

Q: Does the substitute part support the same input types?

A: Both parts accept crystal inputs. The MK5814CMLF accepts generic clock inputs, while the 5P35021B-000NDGI specifies LVCMOS clock inputs. For crystal-based designs, both parts are compatible.

Q: What output signal standards does the substitute provide?

A: The 5P35021B-000NDGI offers LP-HCSL, LVCMOS, LVDS, and LVPECL outputs. Designs requiring LVCMOS output can utilize this standard on the substitute part, maintaining compatibility with existing receiver circuits.

Q: How does the frequency capability difference affect system design?

A: The substitute's 500MHz maximum frequency exceeds the original 128MHz specification. This provides headroom for future design iterations and supports higher-speed applications without component replacement.

Q: Are there packaging considerations for board assembly?

A: Yes. The 8-SOIC package (0.154" width) differs significantly from the 20-VFQFN (3x3mm) package. Assembly process parameters, solder reflow profiles, and inspection procedures must be updated accordingly. Consult assembly partner guidelines for the QFN package type.