ICS621MI Clock Fanout Buffer Equivalent & Substitute Parts

Part Overview

The ICS621MI 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 features LVCMOS output logic levels and operates across a supply voltage range of 1.14V to 1.89V in an 8-SOIC surface mount package.

The ICS621MI is classified as obsolete, making it necessary to identify functionally equivalent substitute components for new designs or ongoing production requirements. Suitable alternatives must maintain the same 1:4 fanout ratio, 200 MHz frequency capability, and 8-SOIC package form factor while meeting current RoHS compliance standards.

Substiute Parts

ICS621MI

Renesas Electronics CorporationIn Stock: 1071ICS621MI Datasheet

Current PartRFQ

PI6C10804WE

Diodes IncorporatedIn Stock: 1892PI6C10804WE Datasheet

MFR RecommendedRFQ

PI6CL10804WE

Diodes IncorporatedIn Stock: 1493PI6CL10804WE Datasheet

MFR RecommendedRFQ

PI6CL10804WEX

Diodes IncorporatedIn Stock: 5216PI6CL10804WEX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ICS621MI is determined by the following critical parameters:

Primary Substitution Criteria:

• Fanout ratio of 1:4 (input to output configuration)
• Maximum frequency capability of 200 MHz or greater
• 8-SOIC package form factor (0.154", 3.90mm Width)
• Surface mount mounting type
• LVCMOS output logic compatibility
• Operating temperature range of -40°C to 85°C

Secondary Considerations:

• Supply voltage compatibility (substitutes must support the operating range)
• RoHS compliance status (preferred for new designs)
• Product status (active or discontinued status affects availability)
• Moisture sensitivity level (MSL 1 - Unlimited for all candidates)

The substitute parts identified below meet all primary criteria and maintain functional equivalence with the ICS621MI while offering improved compliance and availability characteristics.

Parameter Comparison

Engineering Selection Recommendations

PI6CL10804WE and PI6CL10804WEX (Preferred Substitutes)

These Diodes Incorporated components provide the closest functional match to the ICS621MI. Both parts maintain the 1:4 fanout ratio, support 200 MHz maximum frequency, and operate within the -40°C to 85°C temperature range. The supply voltage range of 1.1V to 1.6V overlaps with the ICS621MI specification and supports the required operating conditions. Both parts carry ROHS3 compliance certification, meeting current regulatory requirements for new designs. The PI6CL10804WEX variant is supplied in Tape & Reel packaging with higher inventory availability (5200 pcs), while the PI6CL10804WE is supplied in Tube packaging. Both maintain active product status, ensuring long-term availability and support.

PI6C10804WE (Secondary Substitute)

This Diodes Incorporated alternative supports a maximum frequency of 180 MHz, which is below the ICS621MI specification of 200 MHz. While this part meets the 1:4 fanout ratio and 8-SOIC package requirements, the reduced frequency capability may limit its applicability to designs requiring the full 200 MHz performance envelope. The PI6C10804WE offers broader supply voltage compatibility (1.4V to 2.7V) and dual output logic support (LVCMOS and LVTTL). This part is discontinued at DiGi Electronics, affecting future availability. ROHS3 compliance is maintained.

Compliance and Availability Considerations

All substitute parts are ROHS3 compliant, addressing the non-compliance status of the obsolete ICS621MI. The PI6CL10804WE and PI6CL10804WEX maintain active product status, providing assurance of continued manufacturing and supply chain support. Selection between these two should be based on packaging requirements: Tube packaging for lower-volume applications or Tape & Reel for automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can PI6C10804WE replace ICS621MI in all applications?

A: PI6C10804WE meets the 1:4 fanout ratio, 8-SOIC package, and temperature range requirements. However, its maximum frequency specification of 180 MHz is below the ICS621MI's 200 MHz capability. Substitution is appropriate only for applications operating at or below 180 MHz. For designs requiring full 200 MHz performance, PI6CL10804WE or PI6CL10804WEX are required.

Q: What is the difference between PI6CL10804WE and PI6CL10804WEX?

A: Both parts are functionally identical with matching electrical specifications: 1:4 fanout ratio, 200 MHz maximum frequency, 1.1V to 1.6V supply voltage, and LVCMOS output logic. The primary difference is packaging: PI6CL10804WE is supplied in Tube packaging, while PI6CL10804WEX is supplied in Tape & Reel (TR) format. Tape & Reel packaging is preferred for high-volume automated assembly, while Tube packaging is suitable for lower-volume or manual assembly processes.

Q: Are the substitute parts pin-compatible with ICS621MI?

A: All substitute parts maintain the 8-SOIC package form factor with identical pin count and spacing (0.154", 3.90mm Width). Pin-level compatibility must be verified against specific application schematics and PCB layouts, as functional pin assignments may differ between manufacturers.

Q: What is the supply voltage compatibility between ICS621MI and its substitutes?

A: The ICS621MI operates at 1.14V to 1.89V. PI6CL10804WE and PI6CL10804WEX operate at 1.1V to 1.6V, with overlapping compatibility in the 1.14V to 1.6V range. PI6C10804WE operates at 1.4V to 2.7V, with overlapping compatibility in the 1.4V to 1.89V range. Verify that your power supply design accommodates the substitute part's voltage requirements.

Q: Why is RoHS compliance important for this substitution?

A: The ICS621MI is RoHS non-compliant, reflecting its obsolete status and older manufacturing standards. All substitute parts are ROHS3 compliant, meeting current environmental and regulatory requirements for new product designs and manufacturing. This compliance status is mandatory for many OEM customers and regulatory jurisdictions.

Q: What is the inventory status of these substitute parts?

A: PI6CL10804WEX has the highest inventory availability at 5200 pcs. PI6CL10804WE has 1391 pcs available. PI6C10804WE has 1826 pcs available but is discontinued at DiGi Electronics, affecting future replenishment. For long-term production requirements, PI6CL10804WEX is the recommended choice due to active product status and higher stock levels.