MAX998ESA Equivalent & Substitute Parts

Part Overview

The MAX998ESA is a general-purpose comparator IC manufactured by Analog Devices Inc./Maxim Integrated, featuring push-pull, rail-to-rail output in an 8-SOIC surface mount package. This part is currently obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The MAX998ESA operates across a 2.7V to 5.5V supply range with low input offset voltage and fast propagation delay characteristics suitable for precision signal comparison applications.

Key Parameters

Parameter	Value
Manufacturer	Analog Devices Inc./Maxim Integrated
Category	Linear - Comparator
Type	General Purpose
Number of Elements	1
Output Type	Push-Pull, Rail-to-Rail
Voltage - Supply, Single/Dual (±)	2.7V ~ 5.5V
Voltage - Input Offset (Max)	2mV @ 5V
Current - Input Bias (Max)	0.075µA @ 5.5V
Current - Quiescent (Max)	650µA
CMRR, PSRR (Typ)	95dB CMRR, 100dB PSRR
Propagation Delay (Max)	28ns
Hysteresis	4mV
Operating Temperature	-40°C ~ 85°C
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the MAX998ESA is determined by the following critical parameters: supply voltage range compatibility (2.7V ~ 5.5V minimum), output type (push-pull, rail-to-rail), single comparator element configuration, general-purpose application class, and surface mount packaging. Substitute parts must maintain electrical performance within the specified operating temperature range and comply with RoHS3 requirements.

The substitute parts are grouped into two categories:

Direct Package Equivalent: MAX998ESA+ maintains identical 8-SOIC packaging and electrical specifications, differing only in product status (Active) and packaging format (Tube vs. standard).

Functional Equivalents with Package Variation: TLV3501AQDBVRQ1, TLV3501AZQDBVRQ1, and TLV3701IDBVR provide equivalent or superior electrical performance within the 2.7V ~ 5.5V supply range but utilize different surface mount packages (SOT-23-6 or SOT-23-5). These parts maintain push-pull, rail-to-rail output characteristics and general-purpose comparator functionality.

Parameter Comparison

Parameter	MAX998ESA	MAX998ESA+	TLV3501AQDBVRQ1	TLV3501AZQDBVRQ1	TLV3701IDBVR
Manufacturer	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active
Type	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Output Type	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	CMOS, Push-Pull, Rail-to-Rail, TTL	CMOS, Push-Pull, Rail-to-Rail, TTL	CMOS, Push-Pull, Rail-to-Rail
Voltage - Supply (2.7V ~ 5.5V Range)	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 5.5V	2.7V ~ 16V
Voltage - Input Offset (Max)	2mV @ 5V	2mV @ 5V	6.5mV @ 5.5V	6.5mV @ 5.5V	5mV @ 15V
Current - Input Bias (Max)	0.075µA @ 5.5V	0.075µA @ 5.5V	10pA @ 5.5V	10pA @ 5.5V	250pA @ 15V
Current - Quiescent (Max)	650µA	650µA	5mA	5mA	1µA
CMRR (Typ)	95dB	95dB	70dB	70dB	88dB
PSRR (Typ)	100dB	100dB	100dB	100dB	105dB
Propagation Delay (Max)	28ns	28ns	10ns	10ns	Not specified
Hysteresis	4mV	4mV	6mV	6mV	Not specified
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	8-SOIC	8-SOIC	SOT-23-6	SOT-23-6	SOT-23-5
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Grade	Standard	Standard	Automotive	Automotive	Standard
Qualification	Not specified	Not specified	AEC-Q100	AEC-Q100	Not specified

Engineering Selection Recommendations

MAX998ESA+ (Direct Equivalent): This part is the primary substitute for MAX998ESA, offering identical electrical specifications and 8-SOIC packaging. The MAX998ESA+ is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating. Selection of MAX998ESA+ requires no circuit redesign and maintains full compatibility with existing PCB layouts and component footprints.

TLV3501AQDBVRQ1 and TLV3501AZQDBVRQ1 (Functional Equivalents): These Texas Instruments comparators provide active production status with extended operating temperature range (-40°C ~ 125°C) and automotive-grade qualification (AEC-Q100). Both parts operate within the 2.7V ~ 5.5V supply range and deliver push-pull, rail-to-rail output. The TLV3501 series exhibits faster propagation delay (10ns vs. 28ns) and lower input bias current (10pA vs. 0.075µA). Selection requires PCB layout modification due to SOT-23-6 packaging. The TLV3501AZQDBVRQ1 variant includes Tape & Reel packaging with MSL-3 rating.

TLV3701IDBVR (Extended Voltage Equivalent): This comparator supports extended supply voltage range (2.7V ~ 16V) with superior quiescent current performance (1µA vs. 650µA) and highest PSRR specification (105dB). The TLV3701IDBVR operates across -40°C ~ 125°C and utilizes SOT-23-5 packaging. Selection is appropriate for applications requiring extended voltage operation or ultra-low quiescent current consumption, with corresponding PCB layout modification.

All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original MAX998ESA specification.

Frequently Asked Questions (FAQ)

Q: Can MAX998ESA+ be used as a direct replacement for MAX998ESA?

A: Yes. MAX998ESA+ provides identical electrical specifications, supply voltage range (2.7V ~ 5.5V), output type (push-pull, rail-to-rail), and 8-SOIC packaging. The primary difference is active production status versus obsolete status. No circuit or PCB modifications are required.

Q: What are the key differences between MAX998ESA and TLV3501 series comparators?

A: The TLV3501 series (TLV3501AQDBVRQ1 and TLV3501AZQDBVRQ1) operates within the same 2.7V ~ 5.5V supply range but offers faster propagation delay (10ns vs. 28ns), lower input bias current (10pA vs. 0.075µA), extended operating temperature (-40°C ~ 125°C vs. -40°C ~ 85°C), and automotive-grade qualification (AEC-Q100). The TLV3501 uses SOT-23-6 packaging instead of 8-SOIC, requiring PCB layout modification. Input offset voltage is higher (6.5mV vs. 2mV) and quiescent current is higher (5mA vs. 650µA).

Q: When should TLV3701IDBVR be selected over other substitutes?

A: TLV3701IDBVR is selected when applications require extended supply voltage operation (up to 16V), ultra-low quiescent current (1µA), or superior power supply rejection (105dB PSRR). This part uses SOT-23-5 packaging and requires PCB layout modification. Operating temperature range extends to 125°C.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. MAX998ESA+, TLV3501AQDBVRQ1, TLV3501AZQDBVRQ1, and TLV3701IDBVR are all ROHS3 compliant with REACH unaffected status, matching the original MAX998ESA specification.

Q: What packaging considerations apply when selecting TLV3501 or TLV3701 series?

A: TLV3501AQDBVRQ1 and TLV3501AZQDBVRQ1 use SOT-23-6 packaging (6-pin), while TLV3701IDBVR uses SOT-23-5 packaging (5-pin). Both differ from the original 8-SOIC package, requiring PCB footprint redesign, trace routing modification, and component placement adjustment. Verify PCB layout compatibility and thermal management requirements before implementation.

Q: Do automotive applications have specific part recommendations?

A: TLV3501AQDBVRQ1 and TLV3501AZQDBVRQ1 carry automotive-grade qualification (AEC-Q100) with extended operating temperature range (-40°C ~ 125°C), making them suitable for automotive applications. MAX998ESA+ and TLV3701IDBVR do not carry automotive qualification.

Q: What is the moisture sensitivity difference between substitute parts?

A: MAX998ESA and MAX998ESA+ have MSL-1 (Unlimited) rating. TLV3501AQDBVRQ1 has MSL-2 (1 Year) rating. TLV3501AZQDBVRQ1 has MSL-3 (168 Hours) rating. TLV3701IDBVR has MSL-1 (Unlimited) rating. Lower MSL values require stricter moisture control during storage and handling.

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