MAX941ESA Equivalent & Substitute Parts

Part Overview

The MAX941ESA is a single-channel comparator with integrated latch and shutdown functionality, manufactured by Analog Devices Inc./Maxim Integrated. This device operates as a CMOS, push-pull, TTL output comparator in an 8-SOIC surface mount package. The MAX941ESA is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility across supply voltage ranges, output characteristics, and thermal operating conditions while accommodating different package formats and performance specifications.

Substiute Parts

MAX941ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 3641MAX941ESA Datasheet

Current PartRFQ

MAX941ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2059MAX941ESA+ Datasheet

DirectRFQ

LMV7291MG/NOPB

Texas InstrumentsIn Stock: 3198LMV7291MG/NOPB Datasheet

MFR RecommendedRFQ

MCP6561RT-E/OT

Microchip TechnologyIn Stock: 17115MCP6561RT-E/OT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX941ESA is determined by the following critical parameters:

• Supply voltage compatibility: 2.7V ~ 5.5V range
• Output type: CMOS, push-pull configuration with TTL compatibility
• Propagation delay: Maximum 80ns
• Input offset voltage: Low offset for precision applications
• Package format: Surface mount compatibility
• Product status: Active alternatives preferred for obsolete devices
• Compliance: ROHS3 and REACH requirements

The MAX941ESA+ serves as a direct equivalent with identical electrical specifications but differs in packaging (tube vs. standard). The LMV7291MG/NOPB and MCP6561RT-E/OT are manufacturer-recommended alternatives that meet the core functional requirements while offering enhanced performance characteristics in smaller packages.

Parameter Comparison

Engineering Selection Recommendations

MAX941ESA+ (Direct Equivalent) The MAX941ESA+ is the primary substitute for obsolete MAX941ESA units. It maintains identical electrical specifications, supply voltage range, propagation delay, and output characteristics. The only difference is packaging format (tube). This part is active and ROHS3 compliant, making it suitable for direct replacement in existing designs without circuit modification.

LMV7291MG/NOPB (Texas Instruments Alternative) This comparator offers extended supply voltage flexibility (1.8V ~ 5V single, ±0.9V ~ 2.5V dual) and significantly lower quiescent current (14µA vs. 700µA). The SC-70-5 package is smaller than 8-SOIC, requiring PCB layout adjustment. Propagation delay increases to 1.8µs, which may impact timing-critical applications. Input offset voltage is 4mV, acceptable for most general-purpose comparator applications. ROHS3 compliant and active status support long-term availability.

MCP6561RT-E/OT (Microchip Technology Alternative) This comparator maintains the 80ns propagation delay matching the original MAX941ESA and extends the operating temperature range to 125°C. The SOT-23-5 package is the smallest option, requiring significant PCB redesign. Input bias current is exceptionally low (1pA), and quiescent current is moderate (130µA). The 10mV input offset voltage is higher than the original but acceptable for general-purpose applications. ROHS3 compliant with active product status ensures long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can MAX941ESA+ be used as a direct drop-in replacement for MAX941ESA? A: Yes. The MAX941ESA+ maintains identical electrical specifications, supply voltage range (2.7V ~ 5.5V), propagation delay (80ns), and output characteristics. The only difference is packaging format (tube vs. standard). No circuit modifications are required.

Q: What are the key differences between MAX941ESA and LMV7291MG/NOPB? A: The LMV7291MG/NOPB offers lower quiescent current (14µA vs. 700µA) and extended supply voltage options (1.8V ~ 5V). However, propagation delay increases to 1.8µs, which may affect timing-sensitive circuits. The package is smaller (SC-70-5 vs. 8-SOIC), requiring PCB layout changes. Input offset voltage is 4mV compared to 2mV.

Q: Is the MCP6561RT-E/OT suitable for high-temperature applications? A: Yes. The MCP6561RT-E/OT operates from -40°C to 125°C, extending the upper temperature limit by 40°C compared to the MAX941ESA (-40°C to 85°C). This makes it suitable for industrial and automotive applications requiring extended thermal ranges.

Q: What package considerations apply when substituting these comparators? A: The MAX941ESA uses an 8-SOIC package. The MAX941ESA+ maintains this package. The LMV7291MG/NOPB uses SC-70-5 (5-TSSOP), and the MCP6561RT-E/OT uses SOT-23-5 (SC-74A). Smaller packages require PCB footprint redesign and may affect signal routing and thermal management.

Q: Are all substitute parts ROHS3 compliant? A: Yes. The MAX941ESA+, LMV7291MG/NOPB, and MCP6561RT-E/OT are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity levels, meeting environmental and regulatory requirements.

Q: Which substitute offers the best power efficiency? A: The LMV7291MG/NOPB provides the lowest quiescent current at 14µA, making it the most power-efficient option for battery-powered or low-power applications. The MCP6561RT-E/OT offers moderate efficiency at 130µA quiescent current.

Q: Can these comparators be used interchangeably in timing-critical applications? A: No. The MAX941ESA and MCP6561RT-E/OT both specify 80ns propagation delay. The LMV7291MG/NOPB has significantly higher propagation delay (1.8µs), making it unsuitable for applications requiring fast response times. Verify timing requirements before substitution.