Renesas Electronics 502MLF Clock Generator IC Equivalent & Substitute Parts

Part Overview

The Renesas Electronics 502MLF is a Clock Generator IC rated for 190MHz operation in an 8-SOIC surface mount package. This component is classified as Obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The 502MLF features a Phase-Locked Loop (PLL) with multiplier capability, accepting clock or crystal inputs and delivering CMOS outputs. With a 2:2 input-to-output ratio and supply voltage range of 3V to 5.5V, this IC serves applications requiring stable clock generation in compact form factors.

Key Parameters

Parameter	502MLF Specification
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Clock Generator
Frequency - Max	190MHz
PLL	Yes
Input Type	Clock, Crystal
Output Type	CMOS
Ratio - Input:Output	2:2
Voltage - Supply	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the 502MLF is determined by the following critical parameters: maximum frequency capability, PLL functionality, input/output signal types, supply voltage compatibility, package form factor, and product status. The 502MLF operates at 190MHz maximum with a 2:2 input-to-output ratio, accepts clock or crystal inputs, and outputs CMOS signals within a 3V to 5.5V supply range.

Two categories of substitutes are identified:

Direct Package Substitutes (Same 8-SOIC Form Factor): NB3N502DR2G and NB3N502DG from onsemi maintain the identical 8-SOIC package, 190MHz frequency rating, 3V to 5.5V supply voltage range, and PLL with bypass capability. These parts accept clock or crystal inputs and provide CMOS and TTL outputs. Both are Active status products with extended operating temperature ranges (-40°C to 85°C), offering improved reliability over the obsolete 502MLF.

Functional Upgrade (Different Package): The 5P35021B-000NDGI from Renesas Electronics represents a functional upgrade path with enhanced specifications. While it uses a different 20-VFQFN package, it provides higher frequency capability (500MHz), multiple output types (LP-HCSL, LVCMOS, LVDS, LVPECL), and multiple supply voltage options. This part is suitable for designs requiring higher performance and is Active status.

Parameter Comparison

Parameter	502MLF	NB3N502DR2G	NB3N502DG	5P35021B-000NDGI
Manufacturer	Renesas Electronics	onsemi	onsemi	Renesas Electronics
Type	Clock Generator	PLL Clock Multiplier	PLL Clock Multiplier	Clock Generator
Frequency - Max	190MHz	190MHz	190MHz	500MHz
PLL	Yes	Yes with Bypass	Yes with Bypass	Yes with Bypass
Input Type	Clock, Crystal	Clock, Crystal	Clock, Crystal	LVCMOS, Crystal
Output Type	CMOS	CMOS, TTL	CMOS, TTL	LP-HCSL, LVCMOS, LVDS, LVPECL
Voltage - Supply	3V ~ 5.5V	3V ~ 5.5V	3V ~ 5.5V	1.71V ~ 1.89V, 2.375V ~ 2.625V, 3.135V ~ 3.465V
Operating Temperature	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	20-VFQFN Exposed Pad (3x3)
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Package, Form Factor, and Frequency): Select NB3N502DR2G or NB3N502DG. Both parts maintain the 8-SOIC package footprint, 190MHz frequency specification, and 3V to 5.5V supply voltage compatibility with the 502MLF. The primary advantage of these onsemi alternatives is Active product status with extended operating temperature range (-40°C to 85°C versus 0°C to 70°C). NB3N502DR2G is supplied in Tape & Reel packaging, while NB3N502DG is supplied in Tube packaging. Both are ROHS3 compliant and carry identical ECCN and HTSUS classifications.

For Functional Upgrade (Higher Performance, Different Package): Select 5P35021B-000NDGI when design requirements permit package change. This Renesas VersaClock® part offers 500MHz maximum frequency, multiple output signal types (LP-HCSL, LVCMOS, LVDS, LVPECL), and flexible supply voltage options. The 20-VFQFN package requires PCB layout modification but provides superior performance and Active product status. This part is suitable for new designs or redesigns where higher clock frequencies are beneficial.

Compliance Considerations: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and EAR99 ECCN classification, matching the regulatory profile of the 502MLF.

Frequently Asked Questions (FAQ)

Q: Can NB3N502DR2G or NB3N502DG be used as direct drop-in replacements for the 502MLF?

A: Yes, for applications limited to 190MHz operation. Both onsemi parts use the identical 8-SOIC package and accept the same supply voltage range (3V to 5.5V). Pin-to-pin compatibility and functional equivalence are maintained. The extended operating temperature range (-40°C to 85°C) provides improved reliability compared to the 502MLF specification (0°C to 70°C).

Q: What is the difference between NB3N502DR2G and NB3N502DG?

A: Both parts are functionally identical PLL Clock Multipliers with 190MHz maximum frequency. The primary difference is packaging: NB3N502DR2G is supplied in Tape & Reel format (2978 pcs in stock), while NB3N502DG is supplied in Tube format (1502 pcs in stock). Select based on assembly process requirements and inventory availability.

Q: Why would I choose the 5P35021B-000NDGI over the onsemi alternatives?

A: The 5P35021B-000NDGI is selected when higher frequency operation (500MHz) or multiple output signal types (LP-HCSL, LVCMOS, LVDS, LVPECL) are required. This part supports flexible supply voltage configurations and is suitable for advanced clock distribution applications. PCB layout modification is required due to the 20-VFQFN package change.

Q: Are all substitute parts RoHS compliant?

A: Yes. The 502MLF and all listed substitutes (NB3N502DR2G, NB3N502DG, 5P35021B-000NDGI) are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: What is the input-to-output ratio difference between the 502MLF and substitutes?

A: The 502MLF specifies a 2:2 input-to-output ratio. The onsemi NB3N502 series (NB3N502DR2G and NB3N502DG) specify a 1:2 ratio. The 5P35021B-000NDGI specifies a 2:3 ratio. These differences reflect internal multiplier/divider configurations and do not affect functional compatibility for standard clock generation applications.

Q: Can the 5P35021B-000NDGI operate at the same supply voltages as the 502MLF?

A: Partial compatibility exists. The 502MLF operates at 3V to 5.5V. The 5P35021B-000NDGI supports multiple voltage ranges including 3.135V to 3.465V (compatible with 3.3V systems) but does not support the full 5.5V upper limit. Verify supply voltage requirements for your specific application before selection.

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