RT9818D-33GV Equivalent & Substitute Parts

Part Overview

The RT9818D-33GV is an active low reset supervisor IC manufactured by Richtek USA Inc., designed for single-channel voltage monitoring applications. This Surface Mount device operates across the -40°C to 85°C temperature range and provides open drain output configuration with a 292ms minimum reset timeout. The part is currently in active production status with ROHS3 compliance and REACH unaffected classification. Substitute parts are identified when equivalent electrical specifications, package compatibility, and functional characteristics align with the original design requirements.

Substiute Parts

RT9818D-33GV

Richtek USA Inc.In Stock: 687RT9818D-33GV Datasheet

Current PartRFQ

APX803L40-33SA-7

Diodes IncorporatedIn Stock: 9137APX803L40-33SA-7 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the RT9818D-33GV is determined by strict alignment of the following critical parameters:

• Single-channel voltage monitoring functionality
• 3.3V threshold voltage specification
• Open drain or open collector output configuration
• Active low reset logic
• 292ms minimum reset timeout
• SOT-23-3 package compatibility
• Surface mount mounting type
• Operating temperature range of -40°C to 85°C
• Active product status
• ROHS3 compliance and REACH unaffected classification

The APX803L40-33SA-7 manufactured by Diodes Incorporated meets all specified electrical and mechanical parameters, enabling direct functional substitution in applications requiring single-channel 3.3V supervisor functionality.

Parameter Comparison

Engineering Selection Recommendations

Both the RT9818D-33GV and APX803L40-33SA-7 are active production devices with identical ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on availability, supply chain considerations, and packaging format requirements. The RT9818D-33GV is supplied in standard packaging, while the APX803L40-33SA-7 is available in Tape & Reel format. The APX803L40-33SA-7 features MSL 1 (Unlimited) moisture sensitivity compared to MSL 3 (168 Hours) for the RT9818D-33GV, providing enhanced shelf-life stability for extended storage applications. Both devices maintain identical electrical specifications and package footprints, ensuring direct PCB compatibility.

Frequently Asked Questions (FAQ)

Q: Can the APX803L40-33SA-7 replace the RT9818D-33GV in existing designs?

A: Yes. Both devices share identical electrical specifications including 3.3V threshold voltage, active low reset logic, 292ms minimum reset timeout, and SOT-23-3 package configuration. PCB layout and schematic modifications are not required.

Q: What is the difference in packaging between these parts?

A: The RT9818D-33GV is supplied in standard packaging, while the APX803L40-33SA-7 is supplied in Tape & Reel (TR) format. Both use the SOT-23-3 package footprint with identical pin configuration and spacing.

Q: Are there differences in moisture sensitivity handling?

A: The RT9818D-33GV has MSL 3 rating (168 hours), requiring controlled storage conditions. The APX803L40-33SA-7 has MSL 1 rating (Unlimited), allowing extended shelf storage without moisture bake-out procedures. For applications with extended inventory holding periods, the APX803L40-33SA-7 offers logistical advantages.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the RT9818D-33GV and APX803L40-33SA-7 are ROHS3 compliant and REACH unaffected, meeting identical regulatory classifications.

Q: What determines substitution eligibility for supervisor ICs?

A: Substitution requires matching voltage threshold, output configuration, reset logic polarity, reset timeout specification, package type, and operating temperature range. All these parameters are identical between the RT9818D-33GV and APX803L40-33SA-7.