ICS502MT Clock Generator IC Equivalent & Substitute Parts

Part Overview

The ICS502MT is a Clock Generator IC manufactured by Renesas Electronics Corporation, designed for 190MHz clock generation in 8-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The ICS502MT operates across a 3V to 5.5V supply range with integrated PLL functionality and supports both clock and crystal inputs with CMOS output.

Key Parameters

Parameter	Value
Manufacturer Part Number	ICS502MT
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Type	Clock Generator
Frequency - Max	190MHz
PLL	Yes
Input	Clock, Crystal
Output	CMOS
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	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution for the ICS502MT is determined by the following critical parameters:

Mandatory Matching Parameters:

Package / Case: 8-SOIC (0.154", 3.90mm Width)
Frequency - Max: 190MHz
Voltage - Supply: 3V ~ 5.5V
Mounting Type: Surface Mount
Input capability: Clock, Crystal
PLL functionality: Yes

Acceptable Variation Parameters:

Output type: CMOS or CMOS/TTL (backward compatible)
Operating Temperature range: May extend beyond 0°C ~ 70°C
Product Status: Active parts preferred for long-term availability
RoHS Compliance: Upgrade to RoHS3 compliant alternatives when available
Packaging format: Cut Tape, Tape & Reel, or Tube acceptable for same electrical specifications

The substitute parts listed below maintain electrical and mechanical compatibility while offering improved product status and compliance certifications.

Parameter Comparison

Parameter	ICS502MT	502MLFT	NB3N502DG	NB3N502DR2G
Manufacturer	Renesas	Renesas	onsemi	onsemi
Frequency - Max	190MHz	190MHz	190MHz	190MHz
PLL	Yes	Yes	Yes with Bypass	Yes with Bypass
Input	Clock, Crystal	Clock, Crystal	Clock, Crystal	Clock, Crystal
Output	CMOS	CMOS	CMOS, TTL	CMOS, TTL
Voltage - Supply	3V ~ 5.5V	3V ~ 5.5V	3V ~ 5.5V	3V ~ 5.5V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

502MLFT (Renesas Electronics Corporation): This part provides parametric equivalence to the ICS502MT with identical electrical specifications and 8-SOIC packaging. The 502MLFT offers improved RoHS3 compliance while maintaining the same operating characteristics. However, it retains obsolete product status. This option is suitable for designs requiring strict Renesas manufacturer continuity with enhanced environmental compliance.

NB3N502DG (onsemi): This active product provides functional substitution with extended operating temperature range (-40°C to 85°C) and dual CMOS/TTL output capability. The NB3N502DG includes PLL bypass functionality and RoHS3 compliance. The onsemi platform offers long-term availability and active product support, making it the preferred choice for new designs or long-lifecycle applications.

NB3N502DR2G (onsemi): Electrically identical to NB3N502DG with Tape & Reel packaging format. This variant is optimized for high-volume production environments. It provides the same active product status, extended temperature range, and RoHS3 compliance as the NB3N502DG.

For applications requiring immediate obsolescence mitigation, the onsemi NB3N502 series (NB3N502DG or NB3N502DR2G) is recommended due to active product status and extended operational temperature range.

Frequently Asked Questions (FAQ)

Q: Can NB3N502DG directly replace ICS502MT in existing designs? A: Yes. Both parts share identical 8-SOIC packaging, 190MHz maximum frequency, 3V to 5.5V supply voltage, and PLL-based clock generation architecture. The NB3N502DG extends the operating temperature range to -40°C to 85°C and adds TTL output capability, making it functionally compatible and superior for most applications.

Q: What is the difference between NB3N502DG and NB3N502DR2G? A: These parts are electrically identical. The primary difference is packaging format: NB3N502DG is supplied in Tube packaging, while NB3N502DR2G is supplied in Tape & Reel format. Selection depends on procurement and assembly requirements.

Q: Why is 502MLFT listed as a substitute if it is also obsolete? A: The 502MLFT provides parametric equivalence to the ICS502MT while offering RoHS3 compliance improvement. It serves as an intermediate option for designs requiring Renesas platform continuity. However, for long-term procurement strategy, active products such as the NB3N502 series are recommended.

Q: Are there output compatibility differences between ICS502MT and NB3N502 series? A: The ICS502MT provides CMOS output only. The NB3N502 series provides both CMOS and TTL outputs. CMOS output mode is compatible with ICS502MT designs. TTL output capability in the NB3N502 series is an additional feature that does not affect CMOS-based applications.

Q: Does the extended temperature range of NB3N502 series affect compatibility? A: No. The NB3N502 series operates across -40°C to 85°C, which encompasses the ICS502MT operating range of 0°C to 70°C. Extended temperature capability provides additional design margin and is fully backward compatible.

Q: What is the significance of "PLL with Bypass" in the NB3N502 series? A: The bypass functionality allows the PLL to be disabled, enabling direct clock pass-through operation. This feature provides additional application flexibility compared to the ICS502MT and does not affect standard PLL-based operation.

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