Equivalent & Substitute Parts for Renesas 514MLFT Clock Generator

Part Overview

The Renesas 514MLFT is a Clock Generator Fanout Distribution IC operating at 140MHz maximum frequency in an 8-SOIC package. This component is classified as Obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The 514MLFT provides clock generation and distribution functionality with PLL bypass capability, accepting clock or crystal inputs and delivering CMOS outputs at a 1:2 input-to-output ratio.

Key Parameters

Parameter	514MLFT
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Clock Generator, Fanout Distribution
Package	8-SOIC (0.154", 3.90mm Width)
Frequency - Max	140MHz
Voltage Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
PLL	Yes with Bypass
Input Type	Clock, Crystal
Output Type	CMOS
Ratio - Input:Output	1:2
Number of Circuits	1
Product Status	Obsolete
Mounting Type	Surface Mount
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 514MLFT are selected based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Package type: 8-SOIC form factor for direct PCB footprint compatibility
Voltage supply range: 3V ~ 5.5V operation
PLL with bypass capability
Input acceptance: Clock and/or Crystal inputs
Output format: CMOS or TTL compatible
Input-to-output ratio: 1:2 multiplication capability
Frequency capability: Minimum 140MHz operation

Substitute Categories:

Category 1 - Direct Package & Electrical Match (8-SOIC): NB3N502DR2G and NB3N502DG from onsemi maintain identical 8-SOIC packaging, matching voltage supply range (3V ~ 5.5V), PLL with bypass, 1:2 input-to-output ratio, and support both clock and crystal inputs with CMOS/TTL outputs. These parts exceed the 140MHz requirement at 190MHz maximum frequency.

Category 2 - Functional Equivalent (Different Package): 5L2503-000NVGI8 from Renesas provides clock generation with PLL and divider/multiplier capability in a 12-UFDFN package. This part operates at lower frequency (32.768kHz) and reduced voltage range (1.71V ~ 1.89V), requiring design-level evaluation for application suitability.

Parameter Comparison

Parameter	514MLFT	NB3N502DR2G	NB3N502DG	5L2503-000NVGI8
Manufacturer	Renesas	onsemi	onsemi	Renesas
Package	8-SOIC	8-SOIC	8-SOIC	12-UFDFN
Frequency - Max	140MHz	190MHz	190MHz	32.768kHz
Voltage Supply	3V ~ 5.5V	3V ~ 5.5V	3V ~ 5.5V	1.71V ~ 1.89V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
PLL	Yes with Bypass	Yes with Bypass	Yes with Bypass	Yes
Input Type	Clock, Crystal	Clock, Crystal	Clock, Crystal	Crystal
Output Type	CMOS	CMOS, TTL	CMOS, TTL	LVCMOS
Ratio - Input:Output	1:2	1:2	1:2	1:3
Number of Circuits	1	1	1	3
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Type	Cut Tape	Tape & Reel	Tube	Tape & Reel

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Footprint): NB3N502DR2G and NB3N502DG are the primary substitutes for the 514MLFT. Both parts are Active status products with ROHS3 compliance, providing superior frequency capability (190MHz vs. 140MHz) within the identical 8-SOIC package. The onsemi NB3N502 series maintains voltage supply compatibility (3V ~ 5.5V), PLL with bypass functionality, and 1:2 input-to-output ratio. NB3N502DR2G in Tape & Reel packaging is preferred for production volumes, while NB3N502DG in Tube packaging suits lower-volume or prototype applications.

For Alternative Designs (Different Package): The Renesas 5L2503-000NVGI8 provides clock generation functionality but operates at significantly lower frequency (32.768kHz) and reduced voltage range (1.71V ~ 1.89V). This part is suitable only for applications where the lower frequency and voltage specifications align with system requirements. The 12-UFDFN package requires PCB redesign and is not a direct footprint replacement.

Compliance Considerations: All active substitute parts (NB3N502DR2G, NB3N502DG, 5L2503-000NVGI8) carry ROHS3 compliance certification, meeting current environmental and regulatory requirements. The 514MLFT obsolete status necessitates transition to compliant alternatives for new production.

Frequently Asked Questions (FAQ)

Q: Can NB3N502DR2G and NB3N502DG be used interchangeably with the 514MLFT? A: Yes, both onsemi parts are direct substitutes for the 514MLFT in terms of electrical function and PCB footprint. The 8-SOIC package is identical, voltage supply range matches (3V ~ 5.5V), and both support clock and crystal inputs with 1:2 multiplication. The primary difference is packaging format: NB3N502DR2G is supplied in Tape & Reel, while NB3N502DG is supplied in Tube.

Q: What is the difference between NB3N502DR2G and NB3N502DG? A: Both parts are electrically identical with 190MHz maximum frequency, 1:2 input-to-output ratio, and identical 8-SOIC packaging. The difference is in supply packaging: NB3N502DR2G is Tape & Reel format for automated assembly, while NB3N502DG is Tube format for manual handling or lower-volume applications.

Q: Why is the 5L2503-000NVGI8 listed as a substitute if it operates at 32.768kHz? A: The 5L2503-000NVGI8 is a functional equivalent for clock generation applications but operates at a significantly lower frequency and reduced voltage range. It is suitable only for applications where 32.768kHz frequency and 1.71V ~ 1.89V supply voltage are acceptable. This part requires design-level evaluation and is not a direct replacement for 140MHz applications.

Q: Are all substitute parts ROHS3 compliant? A: Yes, all active substitute parts (NB3N502DR2G, NB3N502DG, and 5L2503-000NVGI8) are ROHS3 compliant. The 514MLFT obsolete status and lack of specified RoHS certification make transition to compliant alternatives necessary for current production standards.

Q: What is the operating temperature range difference between the 514MLFT and its substitutes? A: The 514MLFT operates from 0°C to 70°C, while NB3N502DR2G and NB3N502DG operate from -40°C to 85°C. The extended temperature range of the onsemi parts provides greater operational flexibility for industrial and automotive applications. The 5L2503-000NVGI8 also operates from -40°C to 85°C.

Q: Can the 514MLFT be used in new designs? A: No. The 514MLFT is classified as Obsolete, making it unsuitable for new designs. NB3N502DR2G or NB3N502DG are the recommended substitutes for new development, offering Active product status, ROHS3 compliance, and superior frequency capability.

Q: What inventory status should I consider when selecting a substitute? A: NB3N502DR2G has 2978 pieces in stock, NB3N502DG has 1502 pieces in stock, and 5L2503-000NVGI8 has 5066 pieces in stock. For applications requiring the 8-SOIC package and 140MHz+ frequency, NB3N502DR2G or NB3N502DG are the appropriate choices based on packaging format and inventory availability.

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