MAX990EUA-T Equivalent & Substitute Parts

Part Overview

The MAX990EUA-T is a dual-channel general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated, featuring CMOS open-drain output with rail-to-rail capability and TTL compatibility. The device is packaged in an 8-uMAX/uSOP surface-mount configuration and operates across a supply voltage range of 2.5V to 5.5V (single supply) or ±1.25V to ±2.75V (dual supply).

The MAX990EUA-T is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements. Substitute devices must maintain functional compatibility across critical electrical parameters including supply voltage range, input offset voltage, propagation delay, and output characteristics.

Key Parameters

Parameter	MAX990EUA-T Specification
Manufacturer	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete
Type	General Purpose Comparator
Number of Elements	2
Output Type	CMOS, Open-Drain, Rail-to-Rail, TTL
Voltage - Supply, Single/Dual (±)	2.5V ~ 5.5V, ±1.25V ~ 2.75V
Voltage - Input Offset (Max)	5mV @ 5.5V
Current - Input Bias (Max)	1pA @ 5.5V
Current - Quiescent (Max)	24µA
CMRR, PSRR (Typ)	80dB CMRR, 80dB PSRR
Propagation Delay (Max)	450ns
Hysteresis	±3mV
Operating Temperature	-40°C ~ 85°C
Package / Case	8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MAX990EUA-T are classified based on electrical parameter compatibility and product availability status. The substitution logic is determined by the following critical parameters:

Primary Compatibility Criteria:

Dual-channel comparator configuration (2 elements)
Open-drain output architecture
Supply voltage range overlap with 2.5V ~ 5.5V
Input offset voltage specification ≤ 5mV
Operating temperature range compatibility
8-pin surface-mount package (8-TSSOP/8-MSOP)
ROHS3 compliance and MSL Level 1

Substitute Categories:

Category 1: Direct Parametric Equivalent MAX990EUA+T maintains identical electrical specifications and is the direct replacement with active product status.

Category 2: Functional Equivalents with Extended Supply Range LMC6772AIMM/NOPB, TLV3402IDGKR, and TLV3402IDGK provide comparable comparator functionality with extended supply voltage ranges (2.7V ~ 15V or 2.5V ~ 16V) and compatible output characteristics. These devices support the MAX990EUA-T operating envelope while offering broader application flexibility.

Category 3: Amplifier-Comparator Dual-Function Devices TLV2302IDGK and TLV2302IDGKR combine amplifier and comparator functionality in a single package, providing alternative solutions for applications requiring integrated signal conditioning.

Parameter Comparison

Parameter	MAX990EUA-T	MAX990EUA+T	LMC6772AIMM/NOPB	TLV3402IDGKR	TLV3402IDGK	TLV2302IDGK
Manufacturer	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Product Status	Obsolete	Active	Active	Active	Last Time Buy	Last Time Buy
Number of Elements	2	2	2	2	2	2
Output Type	CMOS, Open-Drain, Rail-to-Rail, TTL	CMOS, Open-Drain, Rail-to-Rail, TTL	Open-Drain	CMOS, Open-Drain	CMOS, Open-Drain	Open-Drain
Voltage - Supply, Single/Dual (±)	2.5V ~ 5.5V, ±1.25V ~ 2.75V	2.5V ~ 5.5V, ±1.25V ~ 2.75V	2.7V ~ 15V, ±1.35V ~ 7.5V	2.7V ~ 16V, ±1.35V ~ 8V	2.7V ~ 16V, ±1.35V ~ 8V	Not specified in data
Voltage - Input Offset (Max)	5mV @ 5.5V	5mV @ 5.5V	5mV @ 5V	3.6mV @ 15V	3.6mV @ 15V	Not specified in data
Current - Input Bias (Max)	1pA @ 5.5V	1pA @ 5.5V	0.04pA @ 5V	250pA @ 15V	250pA @ 15V	Not specified in data
Current - Quiescent (Max)	24µA	24µA	20µA	950nA	950nA	Not specified in data
CMRR, PSRR (Typ)	80dB CMRR, 80dB PSRR	80dB CMRR, 80dB PSRR	75dB CMRR, 80dB PSRR	88dB CMRR, 105dB PSRR	88dB CMRR, 105dB PSRR	Not specified in data
Propagation Delay (Max)	450ns	450ns	10µs	300µs	300µs	Not specified in data
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	Not specified in data
Package / Case	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: MAX990EUA+T

The MAX990EUA+T is the direct parametric equivalent and preferred substitute. It maintains identical electrical specifications, supply voltage range, and thermal operating range as the MAX990EUA-T. The device is currently in active production status, ensuring long-term supply availability. Both devices are ROHS3 compliant with MSL Level 1 rating. This substitution requires no circuit redesign or validation.

Secondary Recommendation: TLV3402IDGKR

The TLV3402IDGKR is suitable for applications where extended supply voltage range (2.7V ~ 16V) and improved PSRR performance (105dB) provide design advantages. The device is in active production status. The extended operating temperature range (-40°C ~ 125°C) supports broader environmental applications. Propagation delay is significantly longer (300µs vs. 450ns), which may impact timing-critical circuits. ROHS3 compliance and MSL Level 1 rating are maintained.

Tertiary Recommendation: LMC6772AIMM/NOPB

The LMC6772AIMM/NOPB provides open-drain output with extended supply voltage capability (2.7V ~ 15V). Input bias current is substantially lower (0.04pA vs. 1pA), beneficial for high-impedance sensing applications. Quiescent current is reduced (20µA vs. 24µA). The device is in active production status with ROHS3 compliance and MSL Level 1 rating. Propagation delay is longer (10µs), requiring timing evaluation in delay-sensitive circuits.

Alternative Consideration: TLV2302IDGK / TLV2302IDGKR

These devices combine amplifier and comparator functionality, suitable for applications requiring integrated signal conditioning. Both are classified as Last Time Buy, indicating limited future availability. Selection should account for long-term supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX990EUA+T be used as a direct drop-in replacement for MAX990EUA-T?

A: Yes. The MAX990EUA+T is a direct parametric equivalent with identical electrical specifications, supply voltage range, and package configuration. No circuit modifications are required. The primary difference is product status: MAX990EUA-T is obsolete while MAX990EUA+T is in active production.

Q: What are the key differences between MAX990EUA-T and TLV3402IDGKR?

A: Both devices are dual-channel comparators with open-drain output and compatible package footprints. TLV3402IDGKR offers extended supply voltage range (2.7V ~ 16V vs. 2.5V ~ 5.5V), improved PSRR (105dB vs. 80dB), and extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C). However, propagation delay is significantly longer (300µs vs. 450ns). Selection depends on timing requirements and supply voltage specifications of the target application.

Q: Are all substitute parts pin-compatible with MAX990EUA-T?

A: All listed substitute parts use the 8-pin TSSOP/MSOP package with identical pin spacing (0.118", 3.00mm width). Physical footprint compatibility is maintained. However, internal pin functionality may differ; verify pinout diagrams before substitution to ensure signal routing compatibility.

Q: What is the impact of propagation delay differences on circuit performance?

A: MAX990EUA-T specifies 450ns maximum propagation delay. TLV3402 series devices specify 300µs, representing a 667× increase. This difference is critical in high-speed switching applications, precision timing circuits, and fast signal detection. Applications with timing margins exceeding 300µs are unaffected. Timing-critical designs require detailed propagation delay analysis before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the environmental and regulatory requirements of the MAX990EUA-T.

Q: Which substitute offers the best supply chain availability?

A: MAX990EUA+T and TLV3402IDGKR are both in active production status, ensuring long-term availability. LMC6772AIMM/NOPB is also active. TLV2302 series devices are classified as Last Time Buy, indicating limited future production and should be avoided for new designs requiring extended product lifecycle support.

Q: Can TLV2302IDGK be used as a comparator-only replacement?

A: Yes. TLV2302IDGK combines amplifier and comparator functionality in a single package. For comparator-only applications, the amplifier section can remain unused. However, Last Time Buy status limits future availability. Designs should prioritize dedicated comparator devices (MAX990EUA+T or TLV3402IDGKR) for long-term production support.

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