ICS553MIT Clock Fanout Buffer Equivalent & Substitute Parts

Part Overview

The ICS553MIT is a Clock Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation, designed for 1:4 clock distribution at frequencies up to 200 MHz. This component operates across a supply voltage range of 2.375V to 5.25V and is housed in an 8-SOIC surface mount package.

The ICS553MIT carries an Obsolete product status. Locating equivalent or substitute components is necessary to maintain design continuity and ensure component availability for new production runs or system updates.

Key Parameters

Parameter	Value
Manufacturer Part Number	ICS553MIT
Manufacturer	Renesas Electronics Corporation
Type	Fanout Buffer (Distribution)
Number of Circuits	1
Ratio - Input:Output	1:4
Input Logic	CMOS
Output Logic	CMOS
Frequency - Max	200 MHz
Voltage - Supply	2.375V ~ 5.25V
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the ICS553MIT is determined by the following critical parameters:

Functional Type: Fanout Buffer (Distribution) with 1:4 input-to-output ratio
Frequency Capability: Maximum operating frequency of 200 MHz or greater
Supply Voltage Range: 2.375V to 5.25V compatibility
Package Compatibility: 8-SOIC (0.154", 3.90mm Width) surface mount package
Logic Levels: Input and output logic compatibility (CMOS or compatible logic families)
Operating Temperature Range: -40°C to 85°C or wider

All identified substitute parts meet these core electrical and mechanical requirements, enabling direct functional replacement in the ICS553MIT application.

Parameter Comparison

Parameter	ICS553MIT	553MILFT	NB3L553DG	NB3L553DR2G
Manufacturer	Renesas Electronics	Renesas Electronics	onsemi	onsemi
Type	Fanout Buffer	Fanout Buffer	Fanout Buffer	Fanout Buffer
Ratio - Input:Output	1:4	1:4	1:4	1:4
Input Logic	CMOS	CMOS	LVCMOS, LVTTL	LVCMOS, LVTTL
Output Logic	CMOS	CMOS	LVCMOS, LVTTL	LVCMOS, LVTTL
Frequency - Max	200 MHz	200 MHz	200 MHz	200 MHz
Voltage - Supply	2.375V ~ 5.25V	2.375V ~ 5.25V	2.375V ~ 5.25V	2.375V ~ 5.25V
Operating Temperature	-40°C ~ 85°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)	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

553MILFT (Renesas Electronics Corporation)

The 553MILFT is the manufacturer-recommended substitute for the ICS553MIT. Both components are manufactured by Renesas Electronics Corporation and share identical electrical specifications and package geometry. The 553MILFT carries Active product status and is ROHS3 compliant, addressing the obsolescence of the original part while maintaining full functional compatibility. This option is preferred for designs requiring continuity within the Renesas ClockBlocks™ series.

NB3L553DG and NB3L553DR2G (onsemi)

Both onsemi alternatives—NB3L553DG and NB3L553DR2G—provide direct functional equivalence to the ICS553MIT. These components are manufactured by onsemi and feature expanded input/output logic compatibility (LVCMOS and LVTTL support) while maintaining identical frequency, voltage, temperature, and package specifications. Both carry Active product status and ROHS3 compliance. The primary distinction between these two onsemi options is packaging format: NB3L553DG is supplied in Tube packaging, while NB3L553DR2G is supplied in Cut Tape (CT) & Digi-Reel® format.

Frequently Asked Questions (FAQ)

Q: Can the 553MILFT directly replace the ICS553MIT without circuit modifications?

A: Yes. The 553MILFT is electrically and mechanically identical to the ICS553MIT. Both components share the same 1:4 fanout buffer functionality, frequency rating, supply voltage range, operating temperature range, and 8-SOIC package geometry. No circuit modifications are required.

Q: What is the difference between the onsemi NB3L553DG and NB3L553DR2G?

A: The electrical specifications and package type are identical between these two onsemi parts. The difference is in packaging format: NB3L553DG is supplied in Tube packaging, while NB3L553DR2G is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on your procurement and assembly requirements.

Q: Are the onsemi NB3L553 variants compatible with CMOS logic inputs and outputs?

A: Yes. The onsemi NB3L553DG and NB3L553DR2G support LVCMOS and LVTTL logic families, which are compatible with standard CMOS logic levels. These components will function correctly in applications designed for CMOS input and output logic.

Q: Why is the ICS553MIT marked as Obsolete?

A: The ICS553MIT has reached end-of-life status. The 553MILFT is the active replacement part from Renesas Electronics Corporation and should be used for new designs and production runs.

Q: Are all substitute parts RoHS compliant?

A: The ICS553MIT is RoHS non-compliant. All three substitute parts—553MILFT, NB3L553DG, and NB3L553DR2G—are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: Can I use these substitutes in high-frequency applications up to 200 MHz?

A: Yes. All substitute parts are rated for maximum frequency operation of 200 MHz, matching the ICS553MIT specification. They are suitable for clock distribution applications operating at or below this frequency limit.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message