MAX990EUA+ Equivalent & Substitute Parts

Part Overview

The MAX990EUA+ is a dual-channel general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated. This CMOS, open-drain, rail-to-rail comparator operates across single supply voltages of 2.5V to 5.5V or dual supplies of ±1.25V to ±2.75V. The device is housed in an 8-pin TSSOP/MSOP surface-mount package and is currently in active product status with 1900 units in stock.

Equivalent and substitute parts are necessary when the MAX990EUA+ is unavailable, when alternative packaging formats are required, or when design specifications allow for components with extended operating ranges or enhanced electrical characteristics. The substitute parts listed maintain functional compatibility through matching package geometry, pin configuration, and core electrical parameters while offering variations in supply voltage ranges, propagation delay, and temperature operating ranges.

Key Parameters

Parameter	MAX990EUA+ Specification
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

Substitution compatibility for the MAX990EUA+ is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 8-TSSOP/8-MSOP surface-mount package with 0.118" width (3.00mm) to ensure direct PCB footprint compatibility.

Functional Elements: All candidates maintain dual-channel (2 elements) comparator architecture with open-drain output configuration.

Supply Voltage Range: The MAX990EUA+ operates within 2.5V to 5.5V single supply or ±1.25V to ±2.75V dual supply. Substitute parts with extended voltage ranges (such as 2.7V to 16V) are compatible when the application operates within the MAX990EUA+ voltage window.

Output Characteristics: Open-drain output type is maintained across all substitutes to preserve circuit interface requirements.

Electrical Performance: Input offset voltage, input bias current, quiescent current, and propagation delay specifications determine functional equivalence. Substitutes with equal or superior (lower) specifications are compatible.

Environmental Compliance: All parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring equivalent environmental and moisture handling requirements.

Parameter Comparison

Parameter	MAX990EUA+	LMC6772AIMM/NOPB	TLV2302IDGK	TLV3402IDGK	TLV3402IDGKR
Manufacturer	Analog Devices Inc./Maxim Integrated	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Number of Elements	2	2	2	2	2
Output Type	CMOS, Open-Drain, Rail-to-Rail, TTL	Open-Drain	Amplifier, Comparator	CMOS, Open-Drain	CMOS, Open-Drain
Voltage - Supply, Single/Dual (±)	2.5V ~ 5.5V, ±1.25V ~ 2.75V	2.7V ~ 15V, ±1.35V ~ 7.5V	Not specified	2.7V ~ 16V, ±1.35V ~ 8V	2.7V ~ 16V, ±1.35V ~ 8V
Voltage - Input Offset (Max)	5mV @ 5.5V	5mV @ 5V	Not specified	3.6mV @ 15V	3.6mV @ 15V
Current - Input Bias (Max)	1pA @ 5.5V	0.04pA @ 5V	Not specified	250pA @ 15V	250pA @ 15V
Current - Quiescent (Max)	24µA	20µA	Not specified	950nA	950nA
CMRR, PSRR (Typ)	80dB CMRR, 80dB PSRR	75dB CMRR, 80dB PSRR	Not specified	88dB CMRR, 105dB PSRR	88dB CMRR, 105dB PSRR
Propagation Delay (Max)	450ns	10µs	Not specified	300µs	300µs
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	Not specified	0°C ~ 70°C	-40°C ~ 125°C
Package / Case	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP	8-TSSOP, 8-MSOP
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Last Time Buy	Last Time Buy	Active
Inventory Availability	1900 Pcs	3439 Pcs	1078 Pcs	3192 Pcs	3716 Pcs

Engineering Selection Recommendations

Primary Substitute - TLV3402IDGKR: This part is recommended as the primary substitute due to its active product status, extended operating temperature range (-40°C to 125°C), superior CMRR and PSRR specifications (88dB and 105dB respectively), and highest inventory availability (3716 units). The TLV3402IDGKR maintains full package compatibility and operates within the MAX990EUA+ supply voltage window while offering enhanced electrical performance.

Alternative Substitute - LMC6772AIMM/NOPB: This Texas Instruments comparator offers active product status with strong inventory availability (3439 units). It provides lower quiescent current (20µA versus 24µA) and superior input bias current performance (0.04pA). The extended supply voltage range (2.7V to 15V) accommodates the MAX990EUA+ operating window. Propagation delay is longer (10µs versus 450ns), which may impact timing-critical applications.

Secondary Substitutes - TLV3402IDGK and TLV3402CDGKR: Both TLV3402 variants maintain comparable electrical characteristics with superior CMRR/PSRR performance. TLV3402CDGKR operates within a narrower temperature range (0°C to 70°C), limiting suitability for extended temperature applications. TLV3402IDGK supports the full -40°C to 125°C range and is available in tube packaging.

Limited Availability - TLV2302IDGK: This part carries Last Time Buy status with lower inventory (1078 units). While functionally compatible, procurement of this device should be avoided for new designs due to end-of-life designation.

Frequently Asked Questions (FAQ)

Q: Can TLV3402IDGKR be used as a direct replacement for MAX990EUA+ without circuit modifications?

A: Yes. Both devices share identical 8-TSSOP/8-MSOP package geometry, dual-channel open-drain comparator architecture, and compatible supply voltage ranges. Pin configuration and functional behavior are equivalent within the MAX990EUA+ operating specifications.

Q: What is the primary difference between TLV3402IDGK and TLV3402IDGKR?

A: The primary difference is packaging format. TLV3402IDGK is supplied in tube packaging, while TLV3402IDGKR uses cut tape and Digi-Reel format. Both variants are electrically identical with active product status and identical electrical specifications.

Q: Why does LMC6772AIMM/NOPB have a longer propagation delay (10µs) compared to MAX990EUA+ (450ns)?

A: The LMC6772 is optimized for lower quiescent current consumption and extended supply voltage operation. The longer propagation delay reflects different internal circuit architecture. Applications requiring sub-microsecond response times should use TLV3402 variants instead.

Q: Are all substitute parts ROHS3 compliant?

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

Q: Which substitute offers the best temperature range coverage?

A: TLV3402IDGKR provides the widest operating temperature range (-40°C to 125°C), exceeding the MAX990EUA+ specification (-40°C to 85°C). This makes it suitable for applications requiring extended temperature operation.

Q: Can TLV2302IDGK be used for new designs?

A: TLV2302IDGK carries Last Time Buy status, indicating end-of-life designation. This part should not be selected for new designs. Use TLV3402IDGKR or LMC6772AIMM/NOPB instead.

Q: What is the inventory status for each substitute?

A: TLV3402IDGKR has the highest availability (3716 units), followed by LMC6772AIMM/NOPB (3439 units) and TLV3402IDGK (3192 units). TLV2302IDGK has limited stock (1078 units) due to Last Time Buy status.

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