Equivalent & Substitute Parts for 502MILFT Clock Generator IC

Part Overview

The 502MILFT is a Clock Generator IC manufactured by Renesas Electronics Corporation, designed for timing and clock distribution applications. This device operates at frequencies up to 140MHz and is housed in an 8-SOIC package. The product is currently classified as obsolete, making identification of functionally equivalent alternatives essential for design continuity and component procurement in legacy system maintenance and new designs requiring compatible timing solutions.

Key Parameters

Parameter	Value
Manufacturer Part Number	502MILFT
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Clock Generator
Package / Case	8-SOIC (0.154", 3.90mm Width)
Frequency - Max	140MHz
Voltage - Supply	3V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
PLL	Yes
Input	Clock, Crystal
Output	CMOS
Number of Circuits	1
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 502MILFT are qualified based on the following critical parameters that determine functional compatibility:

Primary Compatibility Criteria:

Package type: 8-SOIC (0.154", 3.90mm Width) for direct PCB footprint compatibility
Supply voltage range: 3V ~ 5.5V for circuit integration without redesign
Operating temperature range: -40°C ~ 85°C for environmental specification alignment
PLL functionality: Required for clock generation and multiplication capability
Input support: Clock and/or Crystal input capability
Output type: CMOS or TTL output compatibility with downstream logic
Mounting type: Surface Mount for manufacturing process consistency

Substitution Logic: The 502MILFT can be replaced by components that maintain identical or superior electrical and mechanical specifications within these parameters. Substitute parts may exceed the original frequency specification (140MHz maximum) while maintaining backward compatibility. Output type expansion (CMOS to CMOS/TTL) represents functional enhancement without degradation.

Parameter Comparison

Parameter	502MILFT (Main)	NB3N502DR2G	NB3N502DG	5P35021B-000NDGI8
Manufacturer	Renesas Electronics	onsemi	onsemi	Renesas Electronics
Type	Clock Generator	PLL Clock Multiplier	PLL Clock Multiplier	Clock Generator
Package / Case	8-SOIC	8-SOIC	8-SOIC	20QFN
Frequency - Max	140MHz	190MHz	190MHz	Not Specified
Voltage - Supply	3V ~ 5.5V	3V ~ 5.5V	3V ~ 5.5V	Not Specified
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	Not Specified
PLL	Yes	Yes with Bypass	Yes with Bypass	Not Specified
Input	Clock, Crystal	Clock, Crystal	Clock, Crystal	Not Specified
Output	CMOS	CMOS, TTL	CMOS, TTL	Not Specified
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not Specified
Product Status	Obsolete	Active	Active	Active

Engineering Selection Recommendations

NB3N502DR2G and NB3N502DG (onsemi): These PLL Clock Multiplier ICs provide direct functional replacement for the 502MILFT with identical 8-SOIC packaging and electrical specifications. Both devices maintain the 3V ~ 5.5V supply voltage range and -40°C ~ 85°C operating temperature window. The maximum frequency specification of 190MHz exceeds the original 140MHz requirement, ensuring compatibility with existing designs. Both parts are ROHS3 compliant and currently in active production status. The NB3N502DR2G is supplied in Tape & Reel packaging, while the NB3N502DG is supplied in Tube packaging. Selection between these variants depends on procurement and assembly requirements.

5P35021B-000NDGI8 (Renesas Electronics): This Clock Generator IC from the original manufacturer represents an alternative within the Renesas product line. The device is supplied in 20QFN packaging, which differs from the 8-SOIC footprint of the main part. This package change requires PCB layout modification and is suitable only for new designs or redesign scenarios where footprint flexibility exists. The part is currently in active production status and maintains REACH compliance. Detailed electrical specifications for this alternative are not provided in the available data.

Selection Basis:

For direct PCB compatibility without layout modification: NB3N502DR2G or NB3N502DG
For Renesas product line continuity with package redesign capability: 5P35021B-000NDGI8
For high-volume procurement: NB3N502DR2G (Tape & Reel packaging, 2978 Pcs inventory)

Frequently Asked Questions (FAQ)

Q: Can NB3N502DR2G and NB3N502DG be used interchangeably with 502MILFT? A: Yes. Both onsemi parts maintain identical 8-SOIC packaging, supply voltage range (3V ~ 5.5V), and operating temperature specifications (-40°C ~ 85°C). The primary difference is packaging format: NB3N502DR2G is supplied in Tape & Reel, while NB3N502DG is supplied in Tube. PCB footprint compatibility is identical.

Q: What is the advantage of the 190MHz maximum frequency in substitute parts? A: The substitute parts (NB3N502DR2G and NB3N502DG) specify 190MHz maximum frequency compared to the original 140MHz. This higher specification ensures the parts can handle existing designs without frequency-related limitations and provides margin for future design iterations.

Q: Why does 5P35021B-000NDGI8 use a different package? A: The 5P35021B-000NDGI8 uses 20QFN packaging instead of 8-SOIC. This package change reflects different design architecture and feature set within the Renesas product portfolio. This alternative requires PCB redesign and is suitable for new development rather than direct replacement scenarios.

Q: Are all substitute parts RoHS compliant? A: NB3N502DR2G and NB3N502DG are ROHS3 compliant. Compliance status for 5P35021B-000NDGI8 is not specified in available documentation.

Q: What is the difference between PLL and PLL with Bypass? A: The substitute parts feature PLL with Bypass capability, providing additional operational flexibility compared to the original PLL-only design. Bypass mode allows the device to function as a clock buffer when PLL multiplication is not required, expanding application versatility.

Q: Can output type differences (CMOS vs. CMOS/TTL) affect compatibility? A: The substitute parts support both CMOS and TTL output types, while the original 502MILFT supports CMOS only. This represents functional enhancement. Existing designs using CMOS output remain fully compatible. TTL output capability is an additional feature not present in the original part.

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