PT7M7803RTEX Equivalent & Substitute Parts

Part Overview

The PT7M7803RTEX is a supervisor integrated circuit manufactured by Diodes Incorporated, classified as a Power Management (PMIC) device. This component functions as a simple reset/power-on reset supervisor with open drain or open collector output, housed in a SOT-23-3 package. The device is currently listed as obsolete, which necessitates identification of active equivalent and substitute parts for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	PT7M7803RTEX
Manufacturer	Diodes Incorporated
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	2.63V
Output	Open Drain or Open Collector
Reset	Active Low
Reset Timeout	140ms Minimum
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution eligibility for the PT7M7803RTEX is determined by strict equivalence across the following critical parameters:

Voltage Threshold: 2.63V
Number of Voltages Monitored: 1 channel
Output Type: Open Drain or Open Collector
Reset Logic: Active Low
Reset Timeout: 140ms Minimum
Operating Temperature Range: -40°C ~ 85°C (TA)
Package / Case: TO-236-3, SC-59, SOT-23-3
Mounting Type: Surface Mount

All identified substitute parts maintain identical electrical specifications and mechanical compatibility. Substitutes are grouped by manufacturer and product status, with active parts prioritized for new designs and procurement.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Logic	Reset Timeout	Operating Temperature	Package	Product Status	RoHS Status
PT7M7803RTEX	Diodes Incorporated	2.63V	Open Drain/Open Collector	Active Low	140ms Min	-40°C ~ 85°C	SOT-23-3	Obsolete	ROHS3 Compliant
APX803-26SAG-7	Diodes Incorporated	2.63V	Open Drain/Open Collector	Active Low	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
APX803-26SRG-7	Diodes Incorporated	2.63V	Open Drain/Open Collector	Active Low	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
APX803S-26SA-7	Diodes Incorporated	2.63V	Open Drain/Open Collector	Active Low	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
APX803S-26SR-7	Diodes Incorporated	2.63V	Open Drain/Open Collector	Active Low	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
ISL88002IH26Z-TK	Renesas Electronics Corporation	2.63V	Open Drain/Open Collector	Active Low	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
ISL88002IH26Z-T	Renesas Electronics Corporation	2.63V	Open Drain/Open Collector	Active Low	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
ISL88002IH26Z-T7A	Renesas Electronics Corporation	2.63V	Open Drain/Open Collector	Active Low	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
STM1001RWX6F	STMicroelectronics	2.63V	Open Drain/Open Collector	Active Low	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
UM803RS	Union Semiconductor International Limited	2.63V	Open Drain/Open Collector	Active Low	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	RoHS Compliant

Engineering Selection Recommendations

All identified substitute parts are electrically and mechanically equivalent to the PT7M7803RTEX. Selection among active alternatives should be based on the following criteria:

Diodes Incorporated APX803 Series (APX803-26SAG-7, APX803-26SRG-7, APX803S-26SA-7, APX803S-26SR-7): These parts maintain the same manufacturer lineage as the obsolete PT7M7803RTEX and offer the highest design continuity. All variants are ROHS3 compliant with MSL rating of 1 (Unlimited). Packaging variants include standard tape and reel options. Inventory availability ranges from 4,300 to 24,300 units.

Renesas Electronics ISL88002 Series (ISL88002IH26Z-TK, ISL88002IH26Z-T, ISL88002IH26Z-T7A): These parts provide cross-manufacturer equivalence with identical electrical specifications. All variants are ROHS3 compliant with MSL rating of 3 (168 Hours). Inventory availability ranges from 801 to 4,999 units.

STMicroelectronics STM1001RWX6F: This part offers cross-manufacturer equivalence with ROHS3 compliance and MSL rating of 1 (Unlimited). Inventory availability is 5,398 units.

Union Semiconductor UM803RS: This part provides cross-manufacturer equivalence with RoHS compliance. Inventory availability is 25,183 units, the highest among all substitutes.

Frequently Asked Questions (FAQ)

Q: Can the PT7M7803RTEX be directly replaced with any of the listed substitute parts?

A: Yes. All listed substitute parts are parametrically equivalent across voltage threshold (2.63V), output type (open drain/open collector), reset logic (active low), reset timeout (140ms minimum), operating temperature range (-40°C to 85°C), and package type (SOT-23-3). Direct pin-for-pin substitution is supported without circuit modification.

Q: What is the difference between the various APX803 part numbers?

A: The APX803 series variants differ in packaging configuration. APX803-26SAG-7 and APX803S-26SA-7 are supplied in standard packaging, while APX803-26SRG-7 and APX803S-26SR-7 are supplied in tape and reel format. All maintain identical electrical specifications and SOT-23-3 package dimensions.

Q: Are there moisture sensitivity differences among the substitutes?

A: Yes. Diodes Incorporated parts (APX803 series) and STMicroelectronics (STM1001RWX6F) have MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. Renesas Electronics parts (ISL88002 series) have MSL rating of 3 (168 Hours), requiring controlled storage and handling conditions. Union Semiconductor UM803RS does not specify MSL rating in the provided data.

Q: Which substitute offers the best inventory availability?

A: Union Semiconductor UM803RS offers the highest inventory level at 25,183 units. Among Diodes Incorporated alternatives, APX803-26SAG-7 provides 24,300 units. For Renesas Electronics, ISL88002IH26Z-TK provides 4,999 units.

Q: Are all substitutes RoHS compliant?

A: Yes. All substitute parts are RoHS compliant. Diodes Incorporated and STMicroelectronics parts are ROHS3 compliant. Renesas Electronics parts are ROHS3 compliant. Union Semiconductor UM803RS is RoHS compliant. All parts are REACH Unaffected.

Q: Can I use these substitutes in new product designs?

A: Yes. All listed substitute parts carry Active product status, making them suitable for new designs. The PT7M7803RTEX is obsolete and should not be used in new designs.

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