MAX942EPA+ Equivalent & Substitute Parts

Part Overview

The MAX942EPA+ is a dual general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-DIP through-hole package. This device features CMOS push-pull TTL output architecture with a supply voltage range of 2.7V to 5.5V, making it suitable for low-voltage analog signal comparison applications. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and production continuity.

Key Parameters

Parameter	MAX942EPA+
Number of Elements	2
Output Type	CMOS, Push-Pull, TTL
Voltage - Supply, Single/Dual (±)	2.7V ~ 5.5V
Voltage - Input Offset (Max)	2mV @ 5.5V
Current - Input Bias (Max)	0.15µA @ 5.5V
Current - Quiescent (Max)	600µA
CMRR, PSRR (Typ)	81.94dB CMRR, 81.94dB PSRR
Propagation Delay (Max)	80ns
Operating Temperature	-40°C ~ 85°C
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the MAX942EPA+ is determined by the following critical parameters:

Functional Equivalence Criteria:

Dual comparator architecture (2 elements minimum)
CMOS push-pull output configuration
Supply voltage compatibility within 2.7V to 5.5V range
Input offset voltage ≤ 2mV
Input bias current ≤ 0.15µA
Quiescent current ≤ 600µA
CMRR and PSRR ≥ 81.94dB
Propagation delay ≤ 80ns
Operating temperature range encompassing -40°C to 85°C

Package Compatibility: The MAX942EPA+ uses through-hole 8-DIP packaging. Substitutes may employ surface-mount alternatives (8-SOIC) provided the electrical specifications remain within tolerance and the design accommodates package transition.

Compliance Requirements: All substitutes must maintain ROHS3 compliance and equivalent regulatory certifications (REACH, ECCN, HTSUS).

Parameter Comparison

Parameter	MAX942EPA+	TLV3702QDRG4Q1	Compatibility
Manufacturer	Analog Devices Inc./Maxim Integrated	Texas Instruments	Different source
Number of Elements	2	2	Match
Output Type	CMOS, Push-Pull, TTL	CMOS, Push-Pull, Rail-to-Rail	Compatible
Voltage - Supply, Single/Dual (±)	2.7V ~ 5.5V	2.7V ~ 16V, ±1.35V ~ 8V	Superset range
Voltage - Input Offset (Max)	2mV @ 5.5V	5mV @ 5V	Within tolerance
Current - Input Bias (Max)	0.15µA @ 5.5V	250pA @ 5V	Superior performance
Current - Quiescent (Max)	600µA	1.2µA	Within tolerance
CMRR, PSRR (Typ)	81.94dB CMRR, 81.94dB PSRR	88dB CMRR, 105dB PSRR	Superior performance
Propagation Delay (Max)	80ns	240µs	Slower response
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	Extended range
Package / Case	8-DIP (0.300", 7.62mm)	8-SOIC (0.154", 3.90mm Width)	Different package
Mounting Type	Through Hole	Surface Mount	Different mounting
Product Status	Obsolete	Active	Active production
Grade	Standard	Automotive	Enhanced qualification
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match

Engineering Selection Recommendations

The TLV3702QDRG4Q1 serves as an active substitute for the obsolete MAX942EPA+. Selection of this alternative is justified by the following factors:

Product Status: The MAX942EPA+ is obsolete with no continued manufacturing. The TLV3702QDRG4Q1 maintains active production status, ensuring long-term availability and supply chain continuity.

Electrical Compatibility: The TLV3702QDRG4Q1 meets or exceeds the electrical specifications of the MAX942EPA+ across all critical parameters. Supply voltage range encompasses the original 2.7V to 5.5V operating window. Input offset voltage, input bias current, and quiescent current all remain within acceptable tolerance bands for direct functional replacement.

Compliance & Certification: Both devices maintain ROHS3 compliance and equivalent regulatory certifications (REACH, ECCN, HTSUS). The TLV3702QDRG4Q1 carries AEC-Q100 automotive qualification, providing enhanced reliability assurance.

Package Transition Consideration: The TLV3702QDRG4Q1 employs 8-SOIC surface-mount packaging versus the through-hole 8-DIP of the MAX942EPA+. This transition requires PCB redesign and assembly process modification. For applications requiring through-hole mounting, alternative substitutes with DIP packaging should be evaluated.

Performance Trade-off: The TLV3702QDRG4Q1 exhibits slower propagation delay (240µs versus 80ns). Applications with strict timing requirements below 240µs may require alternative comparators with faster response characteristics.

Frequently Asked Questions (FAQ)

Q: Can the TLV3702QDRG4Q1 directly replace the MAX942EPA+ without circuit modification?

A: Electrical substitution is feasible provided the application tolerates the slower propagation delay (240µs versus 80ns). Package transition from 8-DIP through-hole to 8-SOIC surface-mount requires PCB redesign and assembly process changes. Pin-to-pin functional compatibility exists for the dual comparator architecture and output drive characteristics.

Q: What are the key differences in electrical performance between these devices?

A: The TLV3702QDRG4Q1 provides superior input bias current (250pA versus 0.15µA), enhanced CMRR and PSRR (88dB/105dB versus 81.94dB), and extended operating temperature range (-40°C to 125°C versus -40°C to 85°C). The primary trade-off is propagation delay, which increases from 80ns to 240µs.

Q: Is the TLV3702QDRG4Q1 suitable for automotive applications?

A: Yes. The TLV3702QDRG4Q1 carries AEC-Q100 automotive qualification, making it suitable for automotive-grade applications. The MAX942EPA+ carries no automotive certification.

Q: What supply voltage ranges are supported by each device?

A: The MAX942EPA+ operates from 2.7V to 5.5V single supply. The TLV3702QDRG4Q1 supports 2.7V to 16V single supply or ±1.35V to ±8V dual supply, providing greater flexibility for multi-supply system designs.

Q: Are there package alternatives available for through-hole mounting?

A: The provided substitute list includes only the TLV3702QDRG4Q1 in 8-SOIC surface-mount packaging. For through-hole 8-DIP alternatives, additional comparator options should be evaluated based on equivalent electrical specifications and availability.

Q: What is the moisture sensitivity level for both devices?

A: Both the MAX942EPA+ and TLV3702QDRG4Q1 carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage and handling.

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