APX803S-40SA-7 Equivalent & Substitute Parts

Part Overview

The APX803S-40SA-7 is a single-channel power management supervisor IC manufactured by Diodes Incorporated. This device functions as a reset/power-on reset circuit with open drain or open collector output, designed for microprocessor and system supervision applications. The part operates across the industrial temperature range of -40°C to 85°C and is packaged in a surface-mount SOT-23-3 configuration. With 781 units in current inventory and active product status, equivalent and substitute parts are available to support design flexibility, inventory optimization, and supply chain continuity.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	4V
Output	Open Drain or Open Collector
Reset	Active Low
Reset Timeout	140ms Minimum
Operating Temperature	-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

Substitute Part Grouping Explanation

Substitution eligibility for the APX803S-40SA-7 is determined by strict parametric equivalence across the following criteria:

Single-channel voltage monitoring at 4V threshold
Open drain or open collector output configuration
Active low reset signal with 140ms minimum timeout
Operating temperature range of -40°C to 85°C
Surface-mount packaging in SOT-23-3 footprint
RoHS3 compliance and REACH unaffected status

All substitute parts listed maintain identical electrical specifications and mechanical compatibility. Variations in supplier device package designation (SOT-23-3 versus SOT23R) represent equivalent physical implementations of the same footprint standard.

Parameter Comparison

Part Number	Manufacturer	Type	Voltage Threshold	Output	Reset	Reset Timeout	Operating Temperature	Package	RoHS Status	Inventory (Pcs)
APX803S-40SA-7	Diodes Incorporated	Simple Reset/Power-On Reset	4V	Open Drain or Open Collector	Active Low	140ms Minimum	-40°C ~ 85°C	SOT-23-3	ROHS3 Compliant	781
APX803-40SAG-7	Diodes Incorporated	Simple Reset/Power-On Reset	4V	Open Drain or Open Collector	Active Low	140ms Minimum	-40°C ~ 85°C	SOT-23-3	ROHS3 Compliant	802
APX803-40SRG-7	Diodes Incorporated	Simple Reset/Power-On Reset	4V	Open Drain or Open Collector	Active Low	140ms Minimum	-40°C ~ 85°C	SOT23R	ROHS3 Compliant	19139
APX803S-40SR-7	Diodes Incorporated	Simple Reset/Power-On Reset	4V	Open Drain or Open Collector	Active Low	140ms Minimum	-40°C ~ 85°C	SOT-23-3	ROHS3 Compliant	2955
UM803JS	Union Semiconductor International Limited	Simple Reset/Power-On Reset	4V	Open Drain or Open Collector	Active Low	140ms Minimum	-40°C ~ 85°C	SOT-23-3	RoHS Compliant	3806

Engineering Selection Recommendations

All listed substitute parts maintain active product status and full compliance with environmental and regulatory requirements. Selection among equivalent parts should be based on inventory availability and supply chain considerations.

The APX803-40SRG-7 variant offers the highest inventory level at 19,139 units, with SOT23R package designation representing an equivalent physical implementation. The UM803JS from Union Semiconductor International Limited provides an alternative source with 3,806 units available and RoHS compliance certification.

Diodes Incorporated variants (APX803-40SAG-7, APX803S-40SR-7) maintain ROHS3 compliance and represent direct parametric equivalents with intermediate inventory levels of 802 and 2,955 units respectively.

Frequently Asked Questions (FAQ)

Q: Can APX803-40SRG-7 replace APX803S-40SA-7 in existing designs?

A: Yes. Both parts are parametrically equivalent with identical electrical specifications. The SOT23R package designation represents an equivalent physical footprint to SOT-23-3. PCB layout compatibility should be verified for the specific package variant.

Q: What is the difference between ROHS3 and RoHS compliance?

A: ROHS3 represents compliance with the third iteration of the Restriction of Hazardous Substances directive. RoHS Compliant indicates general RoHS adherence. Both certifications confirm restriction of specified hazardous materials. The UM803JS carries RoHS Compliant status while Diodes Incorporated parts carry ROHS3 Compliant status.

Q: Are all substitute parts suitable for -40°C to 85°C operation?

A: Yes. All listed parts operate across the identical temperature range of -40°C to 85°C (TA), meeting industrial temperature specifications.

Q: What determines substitution eligibility for this supervisor IC?

A: Substitution is determined by matching the following parameters: single-channel voltage monitoring, 4V threshold, open drain or open collector output, active low reset, 140ms minimum reset timeout, SOT-23-3 footprint compatibility, and compliance certifications.

Q: Can UM803JS from Union Semiconductor be used as a direct replacement?

A: Yes. The UM803JS maintains all critical electrical parameters and package compatibility. It carries RoHS Compliant certification and REACH unaffected status, meeting the same regulatory requirements as Diodes Incorporated variants.

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