MAX942ESA Equivalent & Substitute Parts

Part Overview

The MAX942ESA is a general-purpose dual comparator IC manufactured by Analog Devices Inc./Maxim Integrated, featuring CMOS push-pull TTL output in an 8-SOIC surface mount package. This part is currently obsolete, making equivalent and substitute parts necessary for new designs and production continuity. The MAX942ESA operates across a 2.7V to 5.5V supply range with low input offset voltage and moderate propagation delay characteristics suitable for general-purpose comparison applications.

Substiute Parts

MAX942ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 25328MAX942ESA Datasheet

Current PartRFQ

MAX942ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 3654MAX942ESA+ Datasheet

DirectRFQ

LMV7272TLX/NOPB

Texas InstrumentsIn Stock: 16762LMV7272TLX/NOPB Datasheet

MFR RecommendedRFQ

MCP6562-E/MS

Microchip TechnologyIn Stock: 6002MCP6562-E/MS Datasheet

MFR RecommendedRFQ

MCP6562T-E/MS

Microchip TechnologyIn Stock: 3051MCP6562T-E/MS Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX942ESA is determined by the following critical parameters:

• Dual comparator configuration (2 elements required)
• Output type compatibility (CMOS, Push-Pull, TTL output)
• Supply voltage range (minimum 2.7V to 5.5V support)
• Input offset voltage (≤2mV @ 5.5V preferred for direct replacement)
• Propagation delay (≤80ns for timing-critical applications)
• Package compatibility (8-pin surface mount options)
• Operating temperature range (-40°C ~ 85°C minimum)

Substitute parts are grouped into two categories:

Direct Equivalent (Same Package): MAX942ESA+ maintains identical electrical specifications and 8-SOIC packaging, differing only in product status (Active vs. Obsolete) and RoHS compliance.

Functional Equivalents (Alternative Packages): MCP6562T-E/MS and MCP6562-E/MS provide dual comparator functionality with compatible electrical performance but in 8-MSOP packaging. LMV7272TLX/NOPB offers dual comparator operation in 8-DSBGA packaging with enhanced specifications including rail-to-rail output and lower quiescent current.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Pin-Compatible, Same Package): Select MAX942ESA+ when PCB layout and package footprint constraints require 8-SOIC form factor. This part maintains identical electrical specifications and operating characteristics while offering Active product status and ROHS3 compliance, eliminating obsolescence risk.

For Functional Equivalence with Enhanced Performance: MCP6562T-E/MS and MCP6562-E/MS provide dual comparator functionality in 8-MSOP packaging with superior input bias current (1pA vs. 0.15µA), lower quiescent current (130µA vs. 600µA), and extended operating temperature range (-40°C ~ 125°C). These parts maintain 80ns propagation delay matching the original specification. Packaging change from 8-SOIC to 8-MSOP requires PCB layout modification. Both parts are ROHS3 compliant and Active status.

For Low-Power Applications with Extended Supply Range: LMV7272TLX/NOPB offers the lowest quiescent current (14µA) and supports extended supply voltage range (1.8V ~ 5.5V, ±0.9V ~ 2.75V) with rail-to-rail output capability. Package change to 8-DSBGA requires significant PCB layout redesign. Propagation delay increases to 2.1µs, unsuitable for timing-critical applications requiring ≤80ns response. ROHS3 compliant and Active status.

All substitute parts maintain dual comparator configuration, CMOS push-pull TTL output compatibility, and -40°C ~ 85°C operating temperature range minimum. Selection depends on package constraints, power budget requirements, and timing specifications of the target application.

Frequently Asked Questions (FAQ)

Q: Can MAX942ESA+ be used as a direct drop-in replacement? A: Yes. MAX942ESA+ is electrically and mechanically identical to MAX942ESA, with identical 8-SOIC packaging, pin configuration, and electrical specifications. The primary differences are Active product status and ROHS3 compliance. No PCB modifications are required.

Q: What are the key differences between MAX942ESA and MCP6562 series comparators? A: Both maintain dual comparator configuration and 80ns propagation delay. MCP6562 series offers significantly lower input bias current (1pA vs. 0.15µA), reduced quiescent current (130µA vs. 600µA), and extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). MCP6562 series packages in 8-MSOP instead of 8-SOIC, requiring PCB layout changes. Input offset voltage is higher (10mV vs. 2mV).

Q: Is LMV7272TLX/NOPB suitable for high-speed comparison applications? A: No. LMV7272TLX/NOPB has 2.1µs propagation delay, significantly slower than MAX942ESA (80ns). This part is optimized for low-power operation with 14µA quiescent current and extended supply range. Use LMV7272TLX/NOPB only when timing requirements permit microsecond-level delays and power consumption is critical.

Q: What packaging considerations apply when switching from MAX942ESA to MCP6562? A: Package changes from 8-SOIC (0.154" width) to 8-MSOP (0.118" width). Pin pitch and lead configuration differ, requiring complete PCB footprint redesign. Verify pinout compatibility before layout changes. Both are surface mount packages with identical pin count.

Q: Are all substitute parts RoHS compliant? A: MAX942ESA is RoHS non-compliant. All substitute parts (MAX942ESA+, MCP6562T-E/MS, MCP6562-E/MS, LMV7272TLX/NOPB) are ROHS3 compliant, meeting current environmental regulations.

Q: Which substitute part offers the best power efficiency? A: LMV7272TLX/NOPB provides the lowest quiescent current at 14µA, compared to 600µA (MAX942ESA), 130µA (MCP6562 series). However, LMV7272TLX/NOPB has significantly higher propagation delay (2.1µs). MCP6562 series offers a balanced approach with 130µA quiescent current and 80ns propagation delay.

Q: Can MAX942ESA be replaced in applications requiring -40°C ~ 125°C temperature range? A: MAX942ESA and MAX942ESA+ operate only to 85°C. For extended temperature range (-40°C ~ 125°C), use MCP6562T-E/MS or MCP6562-E/MS. LMV7272TLX/NOPB operates to 85°C only.