ICS557G-03 Equivalent & Substitute Parts

Part Overview

The ICS557G-03 is an Ethernet and PCI Express (PCIe) Spread Spectrum Clock Generator and Fanout Buffer (Distribution) IC manufactured by Renesas Electronics Corporation. This 16-TSSOP surface mount device generates a 200MHz clock output with PLL-based frequency synthesis from clock or crystal inputs. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system support and new design implementations. Active alternatives from Renesas and other manufacturers provide direct functional replacement with improved product status and compliance certifications.

Key Parameters

Parameter	Value
Manufacturer Part Number	ICS557G-03
Manufacturer	Renesas Electronics Corporation
Category	Clock/Timing
Description	IC CLOCK SOURCE PCI EXP 16-TSSOP
Main Purpose	Ethernet, PCI Express (PCIe)
Frequency - Max	200MHz
Number of Outputs	1
Output Type	HCSL, LVDS
Input Type	Clock, Crystal
Voltage - Supply	2.97V ~ 3.63V
Operating Temperature	0°C ~ 70°C
Package / Case	16-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
PLL	Yes
Ratio - Input:Output	1:2
Differential - Input:Output	No/Yes
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the ICS557G-03 is determined by the following critical parameters:

Frequency Output: 200MHz maximum frequency
Package Type: 16-TSSOP or 16-QSOP (0.173" or 0.154" width variants)
Output Signaling: HCSL and LVDS output capability
Input Signaling: Clock or Crystal input support
Supply Voltage Range: 3.0V to 3.6V nominal (ICS557G-03 operates 2.97V ~ 3.63V)
PLL Architecture: Single-circuit PLL with 1:2 input-to-output ratio
Mounting: Surface mount, single output configuration

Substitute parts are grouped into three categories:

Direct Equivalent (Same Manufacturer): 557G-03LF from Renesas Electronics Corporation maintains identical electrical specifications with active product status and improved RoHS3 compliance.
Functional Upgrade (Diodes Incorporated): PI6C557-03BLE, PI6C557-03BLEX, PI6C557-03BQE, and PI6C557-03BQEX provide equivalent 200MHz clock generation with extended operating temperature range (-40°C ~ 85°C) and active product status. PI6C557-03BQE and PI6C557-03BQEX use 16-QSOP packaging (0.154" width) instead of 16-TSSOP.
Manufacturer Recommended (onsemi): NB3N51032DTG and NB3N51032DTR2G deliver equivalent clock generation with active product status, RoHS3 compliance, and extended temperature range. These parts use identical 16-TSSOP packaging.

Parameter Comparison

Parameter	ICS557G-03	557G-03LF	PI6C557-03BLE	PI6C557-03BLEX	NB3N51032DTG	NB3N51032DTR2G	PI6C557-03BQE	PI6C557-03BQEX	PI6C557-03LEX
Manufacturer	Renesas	Renesas	Diodes Inc.	Diodes Inc.	onsemi	onsemi	Diodes Inc.	Diodes Inc.	Diodes Inc.
Frequency - Max	200MHz	200MHz	200MHz	200MHz	200MHz	200MHz	200MHz	200MHz	200MHz
Number of Outputs	1	1	1	1	1	1	1	1	1
Output Type	HCSL, LVDS	HCSL, LVDS	HCSL, LVDS	HCSL, LVDS	HCSL, LVDS	HCSL, LVDS	HCSL, LVDS	HCSL, LVDS	HSTL, LVDS
Input Type	Clock, Crystal	Clock, Crystal	HCSL, Crystal	HCSL, Crystal	Clock, Crystal	Clock, Crystal	HCSL, Crystal	HCSL, Crystal	CMOS, Crystal
Voltage - Supply	2.97V ~ 3.63V	2.97V ~ 3.63V	3V ~ 3.6V	3V ~ 3.6V	3.135V ~ 3.465V	3.135V ~ 3.465V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	16-TSSOP (0.173")	16-TSSOP (0.173")	16-TSSOP (0.173")	16-TSSOP (0.173")	16-TSSOP (0.173")	16-TSSOP (0.173")	16-SSOP (0.154")	16-SSOP (0.154")	16-TSSOP (0.173")
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
PLL	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes
Ratio - Input:Output	1:2	1:2	1:2	1:2	1:2	1:2	1:2	1:2	1:2
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Not specified	Tube	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Tube	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

For Direct Replacement with Identical Specifications: Select 557G-03LF from Renesas Electronics Corporation. This part maintains the same electrical performance, package footprint, and pinout as the ICS557G-03 while offering active product status and ROHS3 compliance. The operating temperature range remains 0°C ~ 70°C, matching the original specification.

For Extended Temperature Range Applications: Select PI6C557-03BLEX, PI6C557-03BLE, NB3N51032DTR2G, or NB3N51032DTG. These parts extend the operating temperature range to -40°C ~ 85°C, suitable for industrial and automotive environments. All are ROHS3 compliant with active product status. PI6C557-03BLEX and NB3N51032DTR2G are available in Tape & Reel packaging for high-volume production.

For Compact PCB Layouts: Select PI6C557-03BQEX or PI6C557-03BQE if board space is constrained. These parts use 16-QSOP packaging (0.154" width) instead of 16-TSSOP (0.173" width), reducing footprint by approximately 11%. Both maintain 200MHz output and are ROHS3 compliant with active product status.

For High-Volume Production: Select NB3N51032DTR2G (2600 Pcs in stock) or PI6C557-03BLEX (35100 Pcs in stock) in Tape & Reel format for automated assembly. Both offer extended temperature range and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can I use PI6C557-03BQE or PI6C557-03BQEX as direct drop-in replacements for ICS557G-03?

A: These parts are functionally equivalent but use 16-QSOP packaging (0.154" width) instead of 16-TSSOP (0.173" width). PCB layout modifications are required. Pin assignments and electrical performance are compatible. Verify PCB footprint compatibility before implementation.

Q: What is the difference between 557G-03LF and PI6C557-03BLEX?

A: 557G-03LF maintains the original operating temperature range (0°C ~ 70°C) and is the direct Renesas equivalent. PI6C557-03BLEX extends the operating temperature to -40°C ~ 85°C and is manufactured by Diodes Incorporated. Both are ROHS3 compliant and deliver 200MHz output. Select 557G-03LF for standard commercial applications; select PI6C557-03BLEX for extended temperature environments.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (557G-03LF, PI6C557-03BLE, PI6C557-03BLEX, NB3N51032DTG, NB3N51032DTR2G, PI6C557-03BQE, PI6C557-03BQEX, PI6C557-03LEX) are ROHS3 compliant. The original ICS557G-03 is RoHS non-compliant.

Q: What is the difference between Tube and Tape & Reel packaging?

A: Tube packaging is suitable for low-to-medium volume applications and manual assembly. Tape & Reel (TR) packaging is designed for automated pick-and-place assembly in high-volume production. Both formats contain the same electronic component; packaging format selection depends on assembly process requirements.

Q: Can I substitute NB3N51032DTG for ICS557G-03 in existing designs?

A: Yes. NB3N51032DTG is functionally equivalent with identical 16-TSSOP packaging and pinout. It offers extended operating temperature (-40°C ~ 85°C), ROHS3 compliance, and active product status. No PCB modifications are required for direct substitution.

Q: What input signaling types are supported by substitute parts?

A: The original ICS557G-03 accepts Clock or Crystal inputs. Substitute parts from Diodes Incorporated (PI6C557 series) accept HCSL or Crystal inputs. onsemi parts (NB3N51032 series) accept Clock or Crystal inputs. PI6C557-03LEX accepts CMOS or Crystal inputs. Verify input signal compatibility with your clock source before selection.

Q: Are all parts available in the same inventory quantities?

A: No. Inventory varies by part number and packaging format. PI6C557-03BLEX has the highest availability (35100 Pcs), while PI6C557-03BQE has lower availability (800 Pcs). Confirm inventory status with your supplier for production planning.

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