APX803S-23SA-7 Equivalent & Substitute Parts

Part Overview

The APX803S-23SA-7 is a single-channel power supply supervisor IC manufactured by Diodes Incorporated, designed for power-on reset and simple reset applications. This device monitors a single voltage threshold at 2.25V and provides an active-low reset output via open-drain configuration. The part is actively produced and widely used in power management circuits requiring reliable system initialization.

Substitute parts become necessary when the primary part number experiences supply constraints, inventory limitations, or when design flexibility is required across manufacturing batches. The APX803 series provides multiple packaging and configuration variants that maintain electrical and functional equivalence while offering alternative sourcing options.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	2.25V
Output Configuration	Open Drain or Open Collector
Reset Logic	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
Product Status	Active

Substitute Part Grouping Explanation

Substitution within the APX803S-23SA-7 family is determined by the following critical parameters that must remain constant:

Voltage threshold: 2.25V
Number of monitored channels: 1
Output type: Open Drain or Open Collector
Reset logic: Active Low
Reset timeout: 140ms Minimum
Operating temperature range: -40°C ~ 85°C
Mounting type: Surface Mount
Package family: SOT-23-3 (TO-236-3, SC-59)
Compliance: ROHS3, REACH Unaffected

The APX803 base product number encompasses multiple part variants that differ primarily in packaging designation and product lifecycle status. All qualified substitutes maintain identical electrical specifications and functional behavior, enabling direct replacement in circuit designs.

Parameter Comparison

Parameter	APX803S-23SA-7	APX803-23SRG-7	APX803S-23SR-7
Manufacturer	Diodes Incorporated	Diodes Incorporated	Diodes Incorporated
Type	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset	Simple Reset/Power-On Reset
Number of Voltages Monitored	1	1	1
Voltage - Threshold	2.25V	2.25V	2.25V
Output	Open Drain or Open Collector	Open Drain or Open Collector	Open Drain or Open Collector
Reset	Active Low	Active Low	Active Low
Reset Timeout	140ms Minimum	140ms Minimum	140ms Minimum
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Supplier Device Package	SOT-23-3	SOT23R	SOT-23-3
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Not For New Designs	Active

Engineering Selection Recommendations

APX803S-23SA-7 (Primary Selection)

This part is the recommended choice for new designs. It carries Active product status, indicating full manufacturing support and long-term availability. All compliance certifications are current, and inventory levels support production requirements.

APX803S-23SR-7 (Preferred Substitute)

This variant is electrically and functionally identical to the primary part and maintains Active product status. It is suitable for direct substitution in existing designs and new applications. The SOT-23-3 package designation is compatible with the primary part's PCB footprint.

APX803-23SRG-7 (Alternative Substitute)

This part meets all electrical and functional specifications but carries Not For New Designs status. It is available for legacy system support and design continuity in existing products. The SOT23R package designation indicates a tape-and-reel variant. This part should not be selected for new design initiatives.

Selection priority should follow: APX803S-23SA-7 or APX803S-23SR-7 for new designs; APX803-23SRG-7 only when supporting existing production or legacy systems.

Frequently Asked Questions (FAQ)

Q: Can APX803-23SRG-7 be used in new product designs?

A: No. APX803-23SRG-7 carries Not For New Designs status. Use APX803S-23SA-7 or APX803S-23SR-7 for new applications.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use the SOT-23-3 package family (TO-236-3, SC-59) with identical pin assignments and electrical characteristics.

Q: What is the difference between SOT-23-3 and SOT23R package designations?

A: Both designations refer to the same physical package form factor. SOT23R indicates a tape-and-reel packaging variant. PCB footprints are identical.

Q: Can I substitute APX803S-23SR-7 for APX803S-23SA-7 without circuit modifications?

A: Yes. Both parts are electrically equivalent with identical voltage thresholds, reset timing, and output characteristics. No circuit changes are required.

Q: Are there any compliance differences between the substitute parts?

A: No. All three parts are ROHS3 Compliant, REACH Unaffected, and carry identical MSL ratings of 1 (Unlimited).

Q: What determines whether a part can substitute for APX803S-23SA-7?

A: Substitution requires matching voltage threshold (2.25V), single-channel monitoring, active-low reset output, 140ms minimum reset timeout, -40°C to 85°C operating range, and SOT-23-3 package family.

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