PT7M7809RTEX Equivalent & Substitute Parts

Part Overview

The PT7M7809RTEX is a single-channel power management supervisor IC manufactured by Diodes Incorporated, designed for simple reset and power-on reset applications. This device operates as a push-pull, totem pole output supervisor with active-low reset functionality and a 140ms minimum reset timeout. The part is currently in Last Time Buy status, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Voltage Threshold	2.63V
Output Type	Push-Pull, Totem Pole
Reset Logic	Active Low
Reset Timeout	140ms Minimum
Package	SOT-23-3 (TO-236-3, SC-59)
Operating Temperature Range	-40°C to 85°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the PT7M7809RTEX is determined by strict parametric equivalence across the following critical parameters:

Voltage threshold: 2.63V
Output configuration: Push-Pull, Totem Pole
Reset polarity: Active Low
Reset timeout: 140ms Minimum
Package type: SOT-23-3
Operating temperature range: -40°C to 85°C minimum
Compliance: ROHS3 and REACH Unaffected

Parts meeting all these parameters are classified as parametric equivalents. Parts with extended operating temperature ranges (-40°C to 125°C) or alternative packaging formats (SOT23R) are listed as functional alternatives with noted differences. Product status (Active, Not For New Designs, Obsolete, Last Time Buy) is provided for procurement planning but does not affect electrical equivalence.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Logic	Reset Timeout	Operating Temp	Package	Product Status	Inventory (Pcs)
PT7M7809RTEX	Diodes Incorporated	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Last Time Buy	35400
APX809S-26SA-7	Diodes Incorporated	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 125°C	SOT-23-3	Active	12300
APX809-26SAG-7	Diodes Incorporated	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Not For New Designs	32910
APX809-26SRG-7	Diodes Incorporated	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 85°C	SOT23R	Active	24200
CAT809RTBI-GT3	onsemi	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Obsolete	149400
ISL88001IH26Z-T	Renesas Electronics Corporation	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	2030
ISL88001IH26Z-T7A	Renesas Electronics Corporation	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	627
ISL88001IH26Z-TK	Renesas Electronics Corporation	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	2772
MIC809RUY-TR	Microchip Technology	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	2903
STM809RWX6F	STMicroelectronics	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	26100
TCM809RENB713	Microchip Technology	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C to 85°C	SOT-23-3	Active	158754

Engineering Selection Recommendations

For direct replacement of PT7M7809RTEX in existing designs, select from parts with Active product status and matching operating temperature range (-40°C to 85°C). The following parts provide full parametric equivalence with current availability:

ISL88001IH26Z-T, ISL88001IH26Z-T7A, ISL88001IH26Z-TK (Renesas Electronics Corporation)
MIC809RUY-TR (Microchip Technology)
STM809RWX6F (STMicroelectronics)
TCM809RENB713 (Microchip Technology)
APX809-26SRG-7 (Diodes Incorporated, SOT23R package variant)

APX809S-26SA-7 offers extended operating temperature capability (-40°C to 125°C) while maintaining all other electrical parameters, suitable for applications requiring higher temperature margin.

APX809-26SAG-7 and CAT809RTBI-GT3 are parametrically equivalent but carry Not For New Designs and Obsolete status respectively, limiting their use to legacy production support only.

All listed substitutes maintain ROHS3 compliance and REACH Unaffected status consistent with the original part.

Frequently Asked Questions (FAQ)

Q: Can APX809S-26SA-7 replace PT7M7809RTEX in all applications?

A: APX809S-26SA-7 is electrically equivalent with identical voltage threshold, output type, reset logic, and reset timeout. The extended operating temperature range (-40°C to 125°C versus -40°C to 85°C) provides additional thermal margin. Pin-compatible SOT-23-3 packaging allows direct substitution on the PCB.

Q: What is the difference between APX809-26SAG-7 and APX809-26SRG-7?

A: Both parts share identical electrical parameters (2.63V threshold, 140ms reset timeout, active-low reset). The primary difference is package format: APX809-26SAG-7 uses standard SOT-23-3, while APX809-26SRG-7 uses SOT23R variant. Both are pin-compatible with PT7M7809RTEX. APX809-26SRG-7 carries Active status; APX809-26SAG-7 is Not For New Designs.

Q: Are there inventory considerations when selecting a substitute?

A: TCM809RENB713 offers the highest current inventory (158,754 pcs), followed by CAT809RTBI-GT3 (149,400 pcs). However, CAT809RTBI-GT3 is Obsolete. For active production, TCM809RENB713, STM809RWX6F, and APX809-26SRG-7 provide substantial inventory with Active status.

Q: Do all substitutes meet the same compliance requirements?

A: All listed parts are ROHS3 compliant and REACH Unaffected, matching the original PT7M7809RTEX compliance profile. Moisture Sensitivity Level varies between MSL 1 (Unlimited) and MSL 3 (168 Hours), which may affect storage and handling procedures but does not impact electrical equivalence.

Q: Can I use parts with different package variants interchangeably?

A: APX809-26SRG-7 uses SOT23R packaging instead of standard SOT-23-3. While electrically equivalent and pin-compatible, SOT23R has different mechanical dimensions. Verify PCB footprint compatibility before substitution. All other listed parts use standard SOT-23-3 packaging compatible with PT7M7809RTEX.

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