551SDCGI Clock Fanout Buffer IC - Equivalent & Substitute Parts

Part Overview

The 551SDCGI is an active Clock/Timing integrated circuit manufactured by Renesas Electronics Corporation. It functions as a fanout buffer (distribution) IC with a 1:4 input-to-output ratio, designed for clock signal distribution applications up to 200 MHz. The device is currently in active production status with 9,315 pieces available in new original inventory. This part is specified when reliable clock distribution with low skew and jitter characteristics is required in timing-critical applications. Substitute parts are identified when the original part number is unavailable, when inventory constraints exist, or when design flexibility permits equivalent functionality.

Substiute Parts

551SDCGI

Renesas Electronics CorporationIn Stock: 9405551SDCGI Datasheet

Current PartRFQ

553SDCGI

Renesas Electronics CorporationIn Stock: 35423553SDCGI Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 551SDCGI is determined by strict equivalence across the following critical parameters:

• Functional Type: Fanout Buffer (Distribution) IC
• Input:Output Ratio: 1:4 configuration
• Maximum Frequency: 200 MHz minimum capability
• Supply Voltage Range: 1.71V ~ 3.465V
• Operating Temperature Range: -40°C ~ 105°C minimum
• Package Type: 8-SOIC (0.154", 3.90mm Width)
• Mounting Technology: Surface Mount
• Compliance Standards: ROHS3 Compliant, REACH Unaffected

The 553SDCGI meets all these criteria and is classified as a parametric equivalent. Both parts share identical electrical specifications, thermal operating range, supply voltage requirements, and physical packaging. The substitution is valid for direct replacement in circuit designs where the 551SDCGI is specified.

Parameter Comparison

Engineering Selection Recommendations

Both the 551SDCGI and 553SDCGI are active production parts from Renesas Electronics Corporation with full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on inventory availability and supply chain considerations rather than technical performance differences.

The 553SDCGI currently maintains higher inventory levels (35,400 pieces) compared to the 551SDCGI (9,315 pieces), making it the preferred choice for applications where supply continuity is a priority. Both parts carry identical MSL ratings (1 - Unlimited) and require no special moisture handling during storage or assembly.

For new designs or redesigns, either part number is acceptable. For existing designs currently using the 551SDCGI, direct substitution with the 553SDCGI requires no circuit modifications, PCB layout changes, or firmware updates.

Frequently Asked Questions (FAQ)

Q: Can the 553SDCGI replace the 551SDCGI in existing designs?

A: Yes. The 553SDCGI is a parametric equivalent with identical electrical specifications, supply voltage range, frequency capability, operating temperature range, and 8-SOIC package dimensions. Direct substitution is valid without design modifications.

Q: Are there any differences in clock distribution performance between these parts?

A: No. Both parts are specified identically for fanout buffer operation at 1:4 ratio and 200 MHz maximum frequency. Performance characteristics are equivalent.

Q: What is the significance of the different base product numbers (551S vs. 553S)?

A: The base product numbers indicate different internal design revisions or manufacturing process generations within the Renesas product line. Both current versions meet the same electrical and mechanical specifications and are functionally interchangeable.

Q: Do both parts require the same PCB footprint?

A: Yes. Both parts use the 8-SOIC (0.154", 3.90mm Width) package with identical pin configuration and spacing. No PCB layout modifications are required when substituting between these parts.

Q: Are there any compliance or certification differences?

A: No. Both parts carry identical ROHS3 compliance status and REACH unaffected designation. Moisture sensitivity level (MSL 1 - Unlimited) is the same for both parts.

Q: Which part should be selected for new procurement?

A: The 553SDCGI is recommended for new procurement due to higher current inventory availability (35,400 pieces vs. 9,315 pieces). This provides better supply chain flexibility and shorter lead times.