MAX998ESA-T Equivalent & Substitute Parts

Part Overview

The MAX998ESA-T is a general-purpose comparator IC manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface-mount package. This device features push-pull, rail-to-rail output architecture with a supply voltage range of 2.7V to 5.5V, making it suitable for low-voltage analog signal comparison applications.

The MAX998ESA-T is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Active alternatives with compatible electrical and mechanical specifications are available from both Analog Devices and Texas Instruments.

Key Parameters

Parameter	MAX998ESA-T
Manufacturer	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete
Package / Case	8-SOIC (0.154", 3.90mm Width)
Voltage - Supply, Single/Dual (±)	2.7V ~ 5.5V
Output Type	Push-Pull, Rail-to-Rail
Voltage - Input Offset (Max)	2mV @ 5V
Current - Input Bias (Max)	0.075µA @ 5.5V
Current - Quiescent (Max)	650µA
Propagation Delay (Max)	28ns
Hysteresis	4mV
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution of the MAX998ESA-T is determined by the following critical parameters:

Package Compatibility: 8-SOIC form factor with 0.154" width (3.90mm)
Supply Voltage Range: 2.7V to 5.5V single supply operation
Output Architecture: Push-pull, rail-to-rail output capability
Electrical Performance: Input offset voltage, input bias current, quiescent current, and propagation delay within acceptable operating margins
Temperature Range: -40°C to 85°C minimum operating specification
Compliance: ROHS3 compliance and surface-mount technology

Substitute parts are grouped into two categories:

Category 1: Direct Package Match (8-SOIC) Parts maintaining identical 8-SOIC packaging with equivalent electrical specifications.

Category 2: Alternative Package (SOT-23-6) Parts with compatible electrical specifications but different surface-mount package geometry, requiring PCB layout modification.

Parameter Comparison

Parameter	MAX998ESA-T	MAX998ESA+T	TLV3501AID	TLV3501AIDR	TLV3501AIDBVT	TLV3501AIDBVR
Manufacturer	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Active	Active
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	SOT-23-6	SOT-23-6
Voltage - Supply (V)	2.7 ~ 5.5	2.7 ~ 5.5	2.7 ~ 5.5, ±1.35 ~ 2.75	2.7 ~ 5.5, ±1.35 ~ 2.75	2.7 ~ 5.5, ±1.35 ~ 2.75	2.7 ~ 5.5, ±1.35 ~ 2.75
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, TTL	CMOS, Push-Pull, Rail-to-Rail, TTL
Voltage - Input Offset (Max)	2mV @ 5V	2mV @ 5V	6.5mV @ 5.5V	6.5mV @ 5.5V	6.5mV @ 5.5V	6.5mV @ 5.5V
Current - Input Bias (Max)	0.075µA @ 5.5V	0.075µA @ 5.5V	10pA @ 5.5V	10pA @ 5.5V	10pA @ 5.5V	10pA @ 5.5V
Current - Quiescent (Max)	650µA	650µA	5mA	5mA	5mA	5mA
Propagation Delay (Max)	28ns	28ns	10ns	10ns	10ns	10ns
Hysteresis	4mV	4mV	6mV	6mV	6mV	6mV
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount

Engineering Selection Recommendations

Primary Recommendation: MAX998ESA+T

The MAX998ESA+T is the direct equivalent to the MAX998ESA-T, manufactured by Analog Devices Inc./Maxim Integrated. This part maintains identical electrical specifications, package geometry, and performance characteristics. The MAX998ESA+T is currently in active production status with substantial inventory availability (17,220 units), ensuring supply chain continuity. This part requires no design modification and provides the most straightforward replacement path.

Secondary Recommendation: TLV3501AIDR (8-SOIC Package)

The TLV3501AIDR, manufactured by Texas Instruments, is supplied in the same 8-SOIC package as the original MAX998ESA-T. This part is actively produced with high inventory levels (21,696 units). The TLV3501AIDR operates within the required 2.7V to 5.5V supply range and maintains push-pull, rail-to-rail output architecture. The device exhibits improved propagation delay performance (10ns versus 28ns) and lower input bias current (10pA versus 0.075µA), representing enhanced electrical characteristics. Operating temperature range extends to 125°C, providing broader thermal coverage. No PCB layout modification is required.

Alternative Recommendation: TLV3501AIDBVT or TLV3501AIDBVR (SOT-23-6 Package)

The TLV3501AIDBVT and TLV3501AIDBVR are functionally equivalent to the TLV3501AIDR but are packaged in SOT-23-6 form factor. These parts are suitable only when PCB layout can accommodate the smaller package footprint. Both variants are actively produced with adequate inventory (1,286 and 18,463 units respectively). Selection between these variants depends on packaging format requirements (cut tape versus digi-reel).

All recommended substitutes maintain ROHS3 compliance and are suitable for surface-mount assembly processes compatible with the original design.

Frequently Asked Questions (FAQ)

Q: Can the MAX998ESA+T be used as a direct replacement for the MAX998ESA-T without PCB modification?

A: Yes. The MAX998ESA+T is electrically and mechanically identical to the MAX998ESA-T. Both devices use the 8-SOIC package with identical pinout, supply voltage range (2.7V to 5.5V), and output characteristics. No design changes are required.

Q: What are the key differences between the MAX998ESA-T and TLV3501AIDR?

A: Both devices operate within the 2.7V to 5.5V supply range and feature push-pull, rail-to-rail output in 8-SOIC packaging. The TLV3501AIDR exhibits faster propagation delay (10ns versus 28ns), lower input bias current (10pA versus 0.075µA), and extended operating temperature range (-40°C to 125°C versus -40°C to 85°C). Input offset voltage is higher on the TLV3501AIDR (6.5mV versus 2mV). The TLV3501AIDR is manufactured by Texas Instruments rather than Analog Devices.

Q: Can TLV3501AIDBVT or TLV3501AIDBVR be used if the original design uses 8-SOIC packaging?

A: TLV3501AIDBVT and TLV3501AIDBVR use SOT-23-6 packaging, which differs from the 8-SOIC package of the MAX998ESA-T. These parts require PCB layout redesign to accommodate the different package footprint and pinout. Use these alternatives only when PCB modification is feasible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The MAX998ESA+T, TLV3501AID, TLV3501AIDR, TLV3501AIDBVT, and TLV3501AIDBVR are all ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original MAX998ESA-T.

Q: Which substitute part offers the best performance improvement?

A: The TLV3501AIDR provides the most significant performance enhancement, with propagation delay reduced to 10ns (from 28ns) and input bias current reduced to 10pA (from 0.075µA). Operating temperature range extends to 125°C. These improvements are achieved while maintaining 8-SOIC package compatibility and 2.7V to 5.5V supply voltage operation.

Q: What inventory levels are available for each substitute part?

A: MAX998ESA+T: 17,220 units; TLV3501AID: 1,250 units; TLV3501AIDR: 21,696 units; TLV3501AIDBVT: 1,286 units; TLV3501AIDBVR: 18,463 units. Inventory levels support production requirements across all substitute options.

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