APX809-31SRG-7 Equivalent & Substitute Parts

Part Overview

The APX809-31SRG-7 is a single-channel power management supervisor IC manufactured by Diodes Incorporated. This surface-mount component provides push-pull, totem-pole output reset functionality with a 3.08V voltage threshold and 140ms minimum reset timeout. The device operates across the industrial temperature range of -40°C to 85°C and is packaged in SOT-23-3 (TO-236-3, SC-59) format.

The APX809-31SRG-7 maintains active product status with ROHS3 compliance and unlimited moisture sensitivity rating. Equivalent and substitute parts are available from multiple manufacturers, offering identical or enhanced electrical specifications with compatible packaging and functional characteristics.

Substiute Parts

APX809-31SRG-7

Diodes IncorporatedIn Stock: 15189APX809-31SRG-7 Datasheet

Current PartRFQ

APX809S-31SR-7

Diodes IncorporatedIn Stock: 12198APX809S-31SR-7 Datasheet

DirectRFQ

APX809-31SAG-7

Diodes IncorporatedIn Stock: 20124APX809-31SAG-7 Datasheet

Parametric EquivalentRFQ

CAT809TTBI-GT3

onsemiIn Stock: 71301CAT809TTBI-GT3 Datasheet

Parametric EquivalentRFQ

STM809TWX6F

STMicroelectronicsIn Stock: 22239STM809TWX6F Datasheet

Parametric EquivalentRFQ

TCM809TENB713

Microchip TechnologyIn Stock: 35374TCM809TENB713 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the APX809-31SRG-7 are classified based on electrical and mechanical parameter compatibility. The following criteria determine substitution eligibility:

Critical Parameters for Substitution:

• Voltage threshold: 3.08V
• Output type: Push-Pull, Totem Pole
• Reset logic: Active Low
• Reset timeout: 140ms Minimum
• Number of voltages monitored: 1
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Mounting type: Surface Mount
• RoHS compliance: ROHS3 Compliant

Direct Substitutes maintain identical electrical specifications and packaging. Parametric Equivalents provide the same functional performance with compatible package formats and electrical characteristics. All listed substitutes meet the core parameter requirements for direct replacement in applications requiring single-channel power-on reset supervision with 3.08V threshold monitoring.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Product Status):

APX809S-31SR-7 (Diodes Incorporated) is a direct Diodes Incorporated alternative with extended operating temperature range to 125°C, suitable for applications requiring enhanced thermal performance while maintaining identical electrical specifications.

APX809-31SAG-7 (Diodes Incorporated) provides parametric equivalence with identical electrical and thermal characteristics to the APX809-31SRG-7, offering an alternative packaging variant within the same manufacturer family.

STM809TWX6F (STMicroelectronics) and TCM809TENB713 (Microchip Technology) are parametric equivalents from established semiconductor manufacturers, both maintaining active product status with full ROHS3 compliance and identical functional specifications.

Secondary Substitute (Obsolete Status):

CAT809TTBI-GT3 (onsemi) meets all electrical and mechanical parameter requirements but carries obsolete product status. This part remains suitable for applications where existing inventory is available, though long-term availability cannot be assured.

All listed substitutes are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), matching the compliance profile of the APX809-31SRG-7.

Frequently Asked Questions (FAQ)

Q: Can APX809S-31SR-7 replace APX809-31SRG-7 in all applications?

A: APX809S-31SR-7 is a direct substitute with identical electrical specifications and packaging. The extended operating temperature range (-40°C to 125°C versus -40°C to 85°C) provides additional thermal margin. Substitution is valid for all applications within the original temperature specification.

Q: What is the difference between APX809-31SAG-7 and APX809-31SRG-7?

A: Both parts are manufactured by Diodes Incorporated with identical voltage threshold (3.08V), output configuration (push-pull, totem pole), reset logic (active low), and reset timeout (140ms minimum). The designation difference reflects packaging variant coding within the same product family. Electrical performance is equivalent.

Q: Why is CAT809TTBI-GT3 listed as obsolete?

A: CAT809TTBI-GT3 carries obsolete product status from onsemi. While the part meets all electrical and mechanical specifications for substitution, obsolete status indicates discontinued manufacturing. Existing inventory may be available through authorized distributors, but new production is not available.

Q: Are all substitute parts compatible with SOT-23-3 PCB footprints?

A: All listed substitute parts use SOT-23-3 (TO-236-3, SC-59) packaging. PCB footprints designed for SOT-23-3 accommodate all listed alternatives without modification.

Q: Do all substitutes maintain ROHS3 compliance?

A: All listed substitute parts are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity), matching the compliance profile of the APX809-31SRG-7.

Q: Which substitute offers the widest operating temperature range?

A: APX809S-31SR-7 provides the extended operating temperature range of -40°C to 125°C, compared to -40°C to 85°C for the APX809-31SRG-7 and other substitutes.