RT9818C-35GV Equivalent & Substitute Parts

Part Overview

The RT9818C-35GV is an active low reset supervisor IC manufactured by Richtek USA Inc., designed for single-channel voltage monitoring and power-on reset applications. This Surface Mount device operates across the industrial temperature range of -40°C to 85°C and is ROHS3 compliant. The part is currently in active production status with 744 units in stock. Equivalent substitute parts are identified to provide design flexibility, supply chain alternatives, and inventory optimization for applications requiring identical electrical and mechanical specifications.

Substiute Parts

RT9818C-35GV

Richtek USA Inc.In Stock: 762RT9818C-35GV Datasheet

Current PartRFQ

APX803L20-35SA-7

Diodes IncorporatedIn Stock: 3756APX803L20-35SA-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the RT9818C-35GV are identified based on strict electrical and mechanical parameter matching. The substitution criteria are:

• Single-channel voltage monitoring supervisor functionality
• 4.6V voltage threshold setting
• Active Low reset output configuration
• Open Drain or Open Collector output stage
• 143ms minimum reset timeout
• SOT-23-3 package compatibility
• Surface Mount mounting type
• Operating temperature range of -40°C to 85°C
• ROHS3 compliance and REACH unaffected status

The APX803L20-35SA-7 from Diodes Incorporated meets all these electrical and mechanical requirements, making it a direct parametric equivalent for the RT9818C-35GV.

Parameter Comparison

Engineering Selection Recommendations

Both the RT9818C-35GV and APX803L20-35SA-7 are active production devices with ROHS3 compliance and REACH unaffected status, making them suitable for regulated applications. The APX803L20-35SA-7 offers improved moisture sensitivity performance (MSL 1 vs. MSL 3), which may provide advantages in high-humidity storage and assembly environments. Both parts are available in production quantities and meet identical electrical specifications for single-channel 4.6V threshold reset supervision. Selection between these parts should be based on supply chain availability, lead time requirements, and specific moisture sensitivity constraints of the application.

Frequently Asked Questions (FAQ)

Q: Can the APX803L20-35SA-7 be used as a direct replacement for the RT9818C-35GV?

A: Yes. Both parts are parametric equivalents with identical electrical specifications: 4.6V threshold, Active Low reset output, 143ms minimum reset timeout, and SOT-23-3 package. No circuit modifications are required for substitution.

Q: Are there any differences in package dimensions between these parts?

A: No. Both parts use the SOT-23-3 package (TO-236-3, SC-59), which has standardized dimensions and pin assignments. PCB footprints are interchangeable.

Q: What is the significance of the MSL rating difference?

A: The APX803L20-35SA-7 has MSL 1 (Unlimited moisture exposure), while the RT9818C-35GV has MSL 3 (168 hours maximum). MSL 1 provides greater flexibility for storage and assembly processes without bake-out requirements, particularly beneficial in high-humidity environments.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the RT9818C-35GV and APX803L20-35SA-7 are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for EU and global markets.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by: single-channel voltage monitoring, 4.6V threshold setting, Active Low reset output, Open Drain/Open Collector output stage, 143ms minimum reset timeout, and -40°C to 85°C operating temperature range.