MAX6373KA+ Equivalent & Substitute Parts

Part Overview

The MAX6373KA+ is a supervisor integrated circuit from Analog Devices Inc./Maxim Integrated, classified as a Power Management (PMIC) component. This watchdog circuit monitors a single voltage channel with adjustable threshold settings and provides active-low reset output via open drain or open collector configuration. The device operates across the industrial temperature range of -40°C to 125°C and is housed in a SOT-23-8 surface mount package. The MAX6373KA+ maintains active product status and is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and functional parameters that enable direct circuit substitution.

Key Parameters

Parameter	Specification
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Power Management (PMIC)
Type	Watchdog Circuit
Number of Voltages Monitored	1
Voltage Threshold	Adjustable/Selectable
Output Configuration	Open Drain or Open Collector
Reset Type	Active Low
Reset Timeout	Adjustable/Selectable
Operating Temperature Range	-40°C to 125°C (TA)
Mounting Type	Surface Mount
Package / Case	SOT-23-8
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MAX6373KA+ are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Primary Substitution Criteria:

Single voltage channel monitoring capability
Adjustable/selectable voltage threshold setting
Open drain or open collector output configuration
Active low reset output
Adjustable/selectable reset timeout
Industrial temperature range operation (-40°C to 125°C)
SOT-23-8 surface mount package
Watchdog circuit functionality

The MAX6373KA+ has two parametric equivalents: MAX6369KA+ and MAX6371KA. Both devices match all electrical and mechanical parameters required for direct substitution. Differences in compliance status and moisture sensitivity ratings are noted for design consideration but do not affect core functional compatibility.

Parameter Comparison

Parameter	MAX6373KA+	MAX6369KA+	MAX6371KA
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Type	Watchdog Circuit	Watchdog Circuit	Watchdog Circuit
Number of Voltages Monitored	1	1	1
Voltage Threshold	Adjustable/Selectable	Adjustable/Selectable	Adjustable/Selectable
Output Configuration	Open Drain or Open Collector	Open Drain or Open Collector	Open Drain or Open Collector
Reset Type	Active Low	Active Low	Active Low
Reset Timeout	Adjustable/Selectable	Adjustable/Selectable	Adjustable/Selectable
Operating Temperature Range	-40°C to 125°C (TA)	-40°C to 125°C (TA)	-40°C to 125°C (TA)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	SOT-23-8	SOT-23-8	SOT-23-8
Product Status	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Affected

Engineering Selection Recommendations

MAX6369KA+ (Preferred Equivalent): The MAX6369KA+ is a direct parametric equivalent to the MAX6373KA+ with identical electrical specifications and package configuration. Both devices maintain ROHS3 compliance and REACH unaffected status. The MAX6369KA+ carries MSL 1 rating, matching the moisture sensitivity profile of the primary part. This substitute is suitable for applications requiring equivalent performance with no compliance trade-offs.

MAX6371KA (Conditional Equivalent): The MAX6371KA provides functional equivalence across all electrical parameters and package type. However, this part carries RoHS non-compliant status and REACH affected designation, with elevated moisture sensitivity (MSL 3, 168 hours). Selection of MAX6371KA is appropriate only in applications where RoHS and REACH compliance requirements are not mandated or where legacy design constraints necessitate this specific variant.

Frequently Asked Questions (FAQ)

Q: Can MAX6369KA+ be used as a direct replacement for MAX6373KA+ in new designs? A: Yes. The MAX6369KA+ matches all critical electrical and mechanical parameters, including voltage monitoring capability, threshold adjustability, output configuration, temperature range, and SOT-23-8 package. Both devices maintain identical compliance certifications (ROHS3, REACH unaffected) and moisture sensitivity ratings (MSL 1).

Q: What are the compliance differences between MAX6373KA+ and MAX6371KA? A: The MAX6373KA+ is ROHS3 compliant and REACH unaffected, while MAX6371KA is RoHS non-compliant and REACH affected. Additionally, MAX6371KA has MSL 3 (168 hours) moisture sensitivity versus MSL 1 (unlimited) for MAX6373KA+. These differences may impact suitability depending on regulatory requirements and storage/handling conditions.

Q: Are all substitute parts housed in the same package? A: Yes. MAX6373KA+, MAX6369KA+, and MAX6371KA are all housed in SOT-23-8 surface mount packages with identical pinout and mechanical dimensions, enabling direct PCB-level substitution without layout modifications.

Q: What parameters determine substitutability for this watchdog circuit? A: Substitutability is determined by matching: single voltage channel monitoring, adjustable threshold and timeout settings, open drain/open collector output, active low reset configuration, industrial temperature range (-40°C to 125°C), and SOT-23-8 package compatibility. All listed substitutes meet these criteria.

Q: Can MAX6371KA be used in applications requiring RoHS compliance? A: No. MAX6371KA is RoHS non-compliant and therefore unsuitable for applications with mandatory RoHS certification requirements. Use MAX6373KA+ or MAX6369KA+ for RoHS-compliant designs.

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