PT7M7811RTBEX Equivalent & Substitute Parts

Part Overview

The PT7M7811RTBEX is a single-channel power management supervisor IC manufactured by Diodes Incorporated, designed for 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 classified as obsolete, making equivalent substitute parts necessary for ongoing production and maintenance applications. Substitute parts must maintain identical electrical characteristics and mechanical compatibility to ensure direct replacement capability.

Key Parameters

Parameter	Value
Voltage Threshold	2.63V
Output Type	Push-Pull, Totem Pole
Reset Logic	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C ~ 85°C (TA)
Package Type	TO-253-4, TO-253AA (SOT-143-4)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the PT7M7811RTBEX are qualified based on the following critical parameters:

Voltage threshold of 2.63V
Push-pull, totem pole output configuration
Active-low reset logic
140ms minimum reset timeout
Single-channel voltage monitoring
TO-253-4 or TO-253AA package compatibility
Surface mount technology
Operating temperature range of -40°C to 85°C
ROHS3 compliance and MSL 1 rating

All listed substitute parts maintain these electrical and mechanical specifications, enabling direct replacement in existing circuit designs without modification to PCB layout or firmware logic.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage Threshold	Output Type	Reset Logic	Reset Timeout	Package	RoHS Status	Inventory
PT7M7811RTBEX	Diodes Incorporated	Obsolete	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	SOT-143-4	ROHS3	20400 Pcs
APX811-26UG-7	Diodes Incorporated	Active	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	SOT-143	ROHS3	6163 Pcs
ADM811RARTZ-REEL7	Analog Devices Inc.	Active	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	SOT-143-4	ROHS3	41300 Pcs
MAX811REUS+T	Analog Devices Inc./Maxim Integrated	Active	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	SOT-143-4	ROHS3	42700 Pcs
MIC811RUY-TR	Microchip Technology	Active	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	SOT-143	ROHS3	9927 Pcs
STM811RW16F	STMicroelectronics	Active	2.63V	Push-Pull, Totem Pole	Active Low	140ms Min	SOT-143-4	ROHS3	22062 Pcs

Engineering Selection Recommendations

All substitute parts listed maintain active product status with the exception of the original PT7M7811RTBEX, which is obsolete. Selection among active alternatives should prioritize:

ADM811RARTZ-REEL7 and MAX811REUS+T offer the highest inventory availability (41300 and 42700 units respectively) and maintain SOT-143-4 package compatibility with the original part
STM811RW16F provides substantial inventory (22062 units) with identical SOT-143-4 packaging
APX811-26UG-7 and MIC811RUY-TR are available in SOT-143 packaging, which maintains mechanical compatibility with TO-253-4 and TO-253AA footprints

All substitute parts carry ROHS3 compliance and MSL 1 ratings, meeting regulatory and environmental requirements equivalent to the original specification.

Frequently Asked Questions (FAQ)

Q: Can PT7M7811RTBEX be directly replaced with any of the listed substitutes?

A: Yes. All listed substitute parts maintain identical voltage threshold (2.63V), output configuration (push-pull, totem pole), reset logic (active low), and reset timeout (140ms minimum). Package compatibility is maintained across SOT-143 and SOT-143-4 variants, both of which fit TO-253-4 and TO-253AA footprints.

Q: What is the difference between SOT-143 and SOT-143-4 packages?

A: Both package variants are mechanically compatible with the same PCB footprint (TO-253-4, TO-253AA). The designation difference reflects manufacturer nomenclature; electrical and mechanical performance remain equivalent for this application.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification and MSL 1 (unlimited moisture sensitivity) ratings, matching the original PT7M7811RTBEX specification.

Q: Which substitute offers the best availability?

A: MAX811REUS+T provides the highest inventory level at 42700 units, followed by ADM811RARTZ-REEL7 at 41300 units. Both maintain SOT-143-4 package compatibility with the original part.

Q: Do packaging differences affect circuit performance?

A: No. All listed parts use surface mount technology with identical pin configurations and electrical characteristics. Packaging format differences (tape & reel, cut tape, digi-reel) relate only to supply and handling methods, not functional performance.

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