MAX811LEUS-T Equivalent & Substitute Parts

Part Overview

The MAX811LEUS-T is a single-channel power supply supervisor IC manufactured by Analog Devices Inc./Maxim Integrated, designed for reset and power-on reset applications in power management circuits. This component operates as a push-pull, totem pole output supervisor with active-low reset functionality and a 140ms minimum reset timeout. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	MAX811LEUS-T
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	4.63V
Output Configuration	Push-Pull, Totem Pole
Reset Logic	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	TO-253-4, TO-253AA
Supplier Device Package	SOT-143-4
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitute parts for the MAX811LEUS-T are qualified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

Voltage threshold: 4.63V
Output configuration: Push-Pull, Totem Pole
Reset logic: Active Low
Reset timeout: 140ms Minimum
Number of voltages monitored: 1
Operating temperature range: -40°C ~ 85°C (TA)
Mounting type: Surface Mount
Package / Case: TO-253-4, TO-253AA
Supplier device package: SOT-143-4 or SOT-143

All substitute parts listed maintain identical electrical specifications and mechanical compatibility with the original MAX811LEUS-T, ensuring direct functional replacement in existing circuit designs.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Logic	Reset Timeout	Operating Temp	Package	Product Status	RoHS Status
MAX811LEUS-T	Analog Devices Inc./Maxim Integrated	4.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143-4	Obsolete	RoHS non-compliant
MAX811LEUS+T	Analog Devices Inc./Maxim Integrated	4.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143-4	Active	ROHS3 Compliant
STM811LW16F	STMicroelectronics	4.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143-4	Active	ROHS3 Compliant
ADM811LARTZ-REEL7	Analog Devices Inc.	4.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143-4	Active	ROHS3 Compliant
APX811-46UG-7	Diodes Incorporated	4.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143	Active	ROHS3 Compliant
CAT811LTBI-GT3	onsemi	4.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143-4	Obsolete	ROHS3 Compliant
MIC811LUY-TR	Microchip Technology	4.63V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143	Active	ROHS3 Compliant

Engineering Selection Recommendations

For New Designs and Production Continuity:

MAX811LEUS+T is the direct equivalent from Analog Devices Inc./Maxim Integrated, maintaining the original manufacturer lineage while offering active product status and ROHS3 compliance. This part provides the most direct transition from the obsolete MAX811LEUS-T.

For Multi-Source Qualification:

STM811LW16F (STMicroelectronics), ADM811LARTZ-REEL7 (Analog Devices Inc.), APX811-46UG-7 (Diodes Incorporated), and MIC811LUY-TR (Microchip Technology) are parametric equivalents with active product status and ROHS3 compliance. These parts satisfy identical electrical and mechanical requirements and support supply chain diversification.

For Legacy System Support:

CAT811LTBI-GT3 (onsemi) is a parametric equivalent with ROHS3 compliance but carries obsolete product status. This part is suitable only for replacement in existing systems where supply continuity is required.

Frequently Asked Questions (FAQ)

Q: Can MAX811LEUS+T directly replace MAX811LEUS-T in existing designs?

A: Yes. MAX811LEUS+T maintains identical electrical specifications (4.63V threshold, push-pull totem pole output, active-low reset, 140ms timeout) and mechanical compatibility (SOT-143-4 package). The primary difference is product status (active vs. obsolete) and RoHS compliance (ROHS3 vs. non-compliant).

Q: Are the STMicroelectronics STM811LW16F and Diodes Incorporated APX811-46UG-7 pin-compatible with MAX811LEUS-T?

A: Yes. Both parts use SOT-143-4 or SOT-143 packages with identical pinout and electrical specifications. They are direct functional replacements.

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

A: Both designations refer to the same 4-pin surface-mount package used for these supervisor ICs. The specifications and pinout are equivalent.

Q: Why is RoHS compliance important for this substitution?

A: RoHS3 compliance ensures the part meets current environmental and regulatory standards for lead-free manufacturing. The original MAX811LEUS-T is RoHS non-compliant, making compliant substitutes necessary for new production and systems subject to RoHS regulations.

Q: Can I use CAT811LTBI-GT3 as a long-term solution?

A: CAT811LTBI-GT3 is electrically and mechanically equivalent but carries obsolete product status. It is suitable for replacement in existing systems but not recommended for new designs requiring long-term supply assurance.

Q: Which substitute offers the best supply availability?

A: ADM811LARTZ-REEL7 and MAX811LEUS+T both offer high inventory levels (30,696 and 30,400 units respectively) with active product status, providing optimal supply continuity.

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