APX803-44SAG-7 Equivalent & Substitute Parts

Part Overview

The APX803-44SAG-7 is a single-channel power management supervisor IC manufactured by Diodes Incorporated, designed for simple reset and power-on reset applications. This device monitors a single voltage threshold at 4.38V and provides an active-low open-drain output signal. The part is classified as "Not For New Designs," indicating it has reached end-of-life status. For new designs or when stock becomes unavailable, direct substitutes and parametric equivalents from active product lines are available.

Key Parameters

Parameter	Value
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage Threshold	4.38V
Output Type	Open Drain or Open Collector
Reset Logic	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C to 85°C (TA)
Package Type	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution of the APX803-44SAG-7 is determined by strict equivalence across the following critical parameters:

Voltage threshold: 4.38V
Output configuration: Open Drain or Open Collector
Reset logic: Active Low
Reset timeout: 140ms Minimum
Package: SOT-23-3 (TO-236-3, SC-59)
Mounting type: Surface Mount
Operating temperature range: -40°C to 85°C
Number of voltages monitored: 1 channel

All substitute parts listed maintain identical electrical specifications and mechanical compatibility. Substitutes are grouped into two categories: direct manufacturer equivalents from Diodes Incorporated (same base product line) and parametric equivalents from alternative manufacturers (Renesas Electronics, STMicroelectronics, Union Semiconductor International Limited).

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Logic	Reset Timeout	Operating Temp	Package	Product Status	MSL	Inventory (Pcs)
APX803-44SAG-7	Diodes Incorporated	4.38V	Open Drain/Collector	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Not For New Designs	1	15212
APX803S-44SA-7	Diodes Incorporated	4.38V	Open Drain/Collector	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	1	15300
APX803-44SRG-7	Diodes Incorporated	4.38V	Open Drain/Collector	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	1	21100
APX803S-44SR-7	Diodes Incorporated	4.38V	Open Drain/Collector	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	1	4096
ISL88002IH44Z-T7A	Renesas Electronics	4.38V	Open Drain/Collector	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Obsolete	3	1227
STM1001MWX6F	STMicroelectronics	4.38V	Open Drain/Collector	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	1	9350
UM803MS	Union Semiconductor International Limited	4.38V	Open Drain/Collector	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	1	18925

Engineering Selection Recommendations

For applications currently using APX803-44SAG-7, the following selection criteria apply:

Preferred substitutes (Active product status, MSL 1):

APX803S-44SA-7 (Diodes Incorporated) — Direct manufacturer equivalent with highest inventory availability (15300 pcs)
APX803-44SRG-7 (Diodes Incorporated) — Direct manufacturer equivalent with largest inventory stock (21100 pcs)
APX803S-44SR-7 (Diodes Incorporated) — Direct manufacturer equivalent, active status
STM1001MWX6F (STMicroelectronics) — Parametric equivalent, active status, MSL 1
UM803MS (Union Semiconductor International Limited) — Parametric equivalent, active status, MSL 1

Not recommended for new designs:

ISL88002IH44Z-T7A (Renesas Electronics) — Obsolete product status; MSL 3 (168 hours) indicates higher moisture sensitivity compared to MSL 1 alternatives

All recommended substitutes maintain ROHS3 compliance and REACH unaffected status. Diodes Incorporated variants are preferred for design continuity within the same manufacturer ecosystem. Cross-manufacturer parametric equivalents (STMicroelectronics, Union Semiconductor) are electrically and mechanically compatible alternatives when Diodes Incorporated parts are unavailable.

Frequently Asked Questions (FAQ)

Q: Can APX803-44SAG-7 be directly replaced with APX803S-44SA-7? A: Yes. Both parts share identical electrical specifications (4.38V threshold, active-low reset, 140ms timeout, SOT-23-3 package) and operating temperature range (-40°C to 85°C). APX803S-44SA-7 is the active product line equivalent.

Q: What is the difference between APX803-44SAG-7 and APX803-44SRG-7? A: Both parts are electrically and mechanically identical. The suffix variation (-SAG vs -SRG) indicates different packaging or tape reel configurations from Diodes Incorporated. Electrical performance and pinout are equivalent.

Q: Can I use STM1001MWX6F as a substitute? A: Yes. STM1001MWX6F from STMicroelectronics is a parametric equivalent with identical voltage threshold (4.38V), output type (open drain), reset logic (active low), reset timeout (140ms), and SOT-23-3 package. It is an active product with MSL 1 rating.

Q: Why is ISL88002IH44Z-T7A not recommended? A: ISL88002IH44Z-T7A is classified as obsolete and has MSL 3 (168 hours) moisture sensitivity, compared to MSL 1 (unlimited) for other substitutes. While electrically equivalent, its obsolete status and higher moisture sensitivity make it unsuitable for new designs.

Q: Are all substitutes RoHS compliant? A: Yes. All listed substitutes are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: Does package compatibility affect substitution? A: No. All substitutes use the SOT-23-3 package (TO-236-3, SC-59 designations). Surface mount compatibility and pinout are identical across all listed parts.

Q: Which substitute has the best availability? A: APX803-44SRG-7 has the highest inventory (21100 pcs), followed by UM803MS (18925 pcs) and APX803S-44SA-7 (15300 pcs).

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