MAX942C/D Equivalent & Substitute Parts

Part Overview

The MAX942C/D is a dual general-purpose CMOS comparator with TTL-compatible output, manufactured by Analog Devices Inc./Maxim Integrated. This component operates across a 2.7V to 5.5V supply range and features a maximum input offset voltage of 2mV at 5.5V with a propagation delay of 150ns. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

MAX942C/D

Analog Devices Inc./Maxim IntegratedIn Stock: 1109MAX942C/D Datasheet

Current PartRFQ

MAX942CSA+

Analog Devices Inc./Maxim IntegratedIn Stock: 4093MAX942CSA+ Datasheet

MFR RecommendedRFQ

LMV7272TL/NOPB

Texas InstrumentsIn Stock: 3679LMV7272TL/NOPB Datasheet

MFR RecommendedRFQ

MCP6562T-E/SN

Microchip TechnologyIn Stock: 3662MCP6562T-E/SN Datasheet

MFR RecommendedRFQ

TLV3702QDRG4Q1

Texas InstrumentsIn Stock: 1939TLV3702QDRG4Q1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX942C/D is determined by the following critical parameters:

• Dual comparator configuration (2 elements minimum)
• General-purpose comparator type with CMOS and TTL output compatibility
• Supply voltage range of 2.7V to 5.5V (minimum requirement)
• Input offset voltage specification (2mV reference)
• Propagation delay performance (150ns reference)
• Operating temperature range (0°C to 70°C minimum)
• RoHS3 compliance and surface mount packaging

All substitute parts listed maintain compatibility with these core electrical and mechanical parameters. Substitutes are available in active production status with improved or equivalent performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

MAX942CSA+ is the primary direct substitute from the same manufacturer. It maintains identical electrical specifications (2mV input offset, 2.7V-5.5V supply range, 0°C-70°C operating temperature) while offering improved propagation delay (80ns vs. 150ns) and lower input bias current (0.15µA vs. 0.3µA). The 8-SOIC package provides standard surface mount compatibility. This part is in active production with ROHS3 compliance.

MCP6562T-E/SN from Microchip Technology offers comparable propagation delay performance (80ns) with significantly lower input bias current (1pA). It supports extended temperature range (-40°C to 125°C) and provides rail-to-rail output capability. The 8-SOIC package matches standard PCB assembly requirements. ROHS3 compliant and actively produced.

LMV7272TL/NOPB from Texas Instruments provides the lowest input bias current (0.01µA) and extended temperature range (-40°C to 85°C). The 8-DSBGA package offers compact form factor for space-constrained applications. Note that propagation delay is significantly higher (2.1µs), which may impact timing-critical circuits. ROHS3 compliant and in active production.

TLV3702QDRG4Q1 from Texas Instruments is qualified for automotive applications (AEC-Q100) with the widest supply voltage range (2.7V-16V) and highest PSRR (105dB). Propagation delay is substantially higher (240µs), making this suitable only for non-time-critical comparator applications. The 8-SOIC package is standard. ROHS3 compliant and actively produced.

Frequently Asked Questions (FAQ)

Q: Can MAX942CSA+ directly replace MAX942C/D in existing designs?

A: Yes. MAX942CSA+ maintains identical supply voltage range (2.7V-5.5V), input offset voltage (2mV @ 5.5V), and operating temperature range (0°C-70°C). The primary difference is packaging (8-SOIC vs. Die) and improved propagation delay (80ns vs. 150ns). PCB layout modifications are required to accommodate the packaged component.

Q: What are the key differences between the substitute options?

A: MAX942CSA+ provides the closest electrical match with fastest propagation delay (80ns). MCP6562T-E/SN offers superior input bias current (1pA) and extended temperature range. LMV7272TL/NOPB provides the lowest input bias current but slower propagation delay (2.1µs). TLV3702QDRG4Q1 is automotive-qualified with the widest supply range but slowest propagation delay (240µs).

Q: Which substitute is suitable for timing-critical applications?

A: MAX942CSA+ and MCP6562T-E/SN both provide 80ns propagation delay, matching or exceeding the original MAX942C/D specification (150ns). LMV7272TL/NOPB and TLV3702QDRG4Q1 have significantly higher propagation delays and are not suitable for timing-critical circuits.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and meet current environmental regulations.

Q: What packaging considerations apply to substitutes?

A: MAX942CSA+, MCP6562T-E/SN, and TLV3702QDRG4Q1 are supplied in 8-SOIC packages. LMV7272TL/NOPB uses 8-DSBGA packaging. The original MAX942C/D is a die form. Standard surface mount assembly equipment accommodates SOIC and DSBGA packages.

Q: Which substitute offers the best low-power performance?

A: TLV3702QDRG4Q1 has the lowest quiescent current (1.2µA) and MCP6562T-E/SN offers the lowest input bias current (1pA). For applications prioritizing minimal power consumption, these options provide significant advantages over the original specification.