MAX991EUA-T Equivalent & Substitute Parts

Part Overview

The MAX991EUA-T is a dual-channel general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated. It features CMOS push-pull, rail-to-rail output with TTL compatibility in an 8-uMAX/uSOP surface-mount package. The device operates across a supply voltage range of 2.5V to 5.5V (single supply) or ±1.25V to ±2.75V (dual supply), with a maximum input offset voltage of 5mV and propagation delay of 210ns.

The MAX991EUA-T is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and legacy system support.

Substiute Parts

MAX991EUA-T

Analog Devices Inc./Maxim IntegratedIn Stock: 947MAX991EUA-T Datasheet

Current PartRFQ

MAX991EUA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2410MAX991EUA+T Datasheet

Parametric EquivalentRFQ

AZV3002RL-7

Diodes IncorporatedIn Stock: 6468AZV3002RL-7 Datasheet

MFR RecommendedRFQ

LMC6762AIMX

Texas InstrumentsIn Stock: 5287LMC6762AIMX Datasheet

MFR RecommendedRFQ

LMC6762AIMX/NOPB

Texas InstrumentsIn Stock: 4371LMC6762AIMX/NOPB Datasheet

MFR RecommendedRFQ

LMC6762BIM/NOPB

Texas InstrumentsIn Stock: 1360LMC6762BIM/NOPB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX991EUA-T is determined by the following critical parameters:

• Number of Elements: Must be 2 (dual-channel comparator)
• Output Type: Must include push-pull capability; rail-to-rail and TTL compatibility are preferred but not mandatory
• Supply Voltage Range: Must support the application's operating voltage (minimum 2.5V single supply or ±1.25V dual supply)
• Input Offset Voltage: Lower values indicate better precision; maximum acceptable offset depends on application requirements
• Propagation Delay: Critical for high-speed applications; longer delays may impact timing-sensitive circuits
• Package Compatibility: Surface-mount packages with similar footprints and pin counts enable direct PCB substitution
• Operating Temperature Range: Must match or exceed -40°C to 85°C
• Product Status & Compliance: Active or parametrically equivalent parts ensure long-term availability and regulatory compliance

The following parts meet these substitution criteria:

Parametric Equivalent (Same Base Product):

• MAX991EUA+T (Analog Devices Inc./Maxim Integrated) — Active product status, identical electrical specifications

Manufacturer Recommended Alternatives:

• AZV3002RL-7 (Diodes Incorporated) — Different package (8-UFLGA), extended supply range (1.6V ~ 5.5V)
• LMC6762AIMX (Texas Instruments) — Obsolete, 8-SOIC package, extended supply range (2.7V ~ 15V)
• LMC6762AIMX/NOPB (Texas Instruments) — Active product status, 8-SOIC package, extended supply range (2.7V ~ 15V)
• LMC6762BIM/NOPB (Texas Instruments) — Last Time Buy status, 8-SOIC package, extended supply range (2.7V ~ 15V)

Parameter Comparison

Engineering Selection Recommendations

First Choice: MAX991EUA+T

The MAX991EUA+T is the direct parametric equivalent with identical electrical specifications and pin configuration. It maintains active product status, ensuring long-term availability and supply chain stability. This part requires no design modifications and provides the shortest qualification timeline. ROHS3 compliance and MSL 1 rating match the original specification.

Alternative: LMC6762AIMX/NOPB

The LMC6762AIMX/NOPB offers active product status with extended supply voltage range (2.7V ~ 15V single supply, ±1.35V ~ 7.5V dual supply). The 8-SOIC package requires PCB layout modification but provides superior input bias current (0.04pA vs. 1pA) and lower quiescent current (20µA vs. 96µA). Propagation delay is significantly longer (10µs vs. 210ns), making this suitable only for non-time-critical applications. ROHS3 compliance and MSL 1 rating are maintained.

Alternative: AZV3002RL-7

The AZV3002RL-7 provides active product status with the widest supply voltage range (1.6V ~ 5.5V). The 8-UFLGA package requires PCB redesign. Input offset voltage is higher (30mV vs. 5mV), and propagation delay is longer (0.8µs vs. 210ns). Quiescent current is significantly lower (6µA typical). MSL 3 rating requires controlled moisture handling during assembly. This part is suitable for low-power, low-speed applications with relaxed precision requirements.

Not Recommended: LMC6762AIMX

This part is obsolete and should not be selected for new designs. Use LMC6762AIMX/NOPB instead.

Not Recommended: LMC6762BIM/NOPB

This part carries Last Time Buy status, indicating imminent discontinuation. Input offset voltage is degraded (15mV vs. 5mV). Selection should be limited to legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can MAX991EUA+T be used as a direct replacement for MAX991EUA-T?

A: Yes. The MAX991EUA+T is a parametric equivalent with identical electrical specifications, pin configuration, and package. No design changes are required. The primary difference is product status: MAX991EUA+T is active, while MAX991EUA-T is obsolete.

Q: What are the key differences between the MAX991EUA-T and LMC6762AIMX/NOPB?

A: The LMC6762AIMX/NOPB has a different package (8-SOIC vs. 8-TSSOP/8-MSOP), extended supply voltage range (2.7V ~ 15V vs. 2.5V ~ 5.5V), lower input bias current (0.04pA vs. 1pA), and significantly longer propagation delay (10µs vs. 210ns). PCB layout modification is required. This part is suitable only for applications where timing is not critical.

Q: Is the AZV3002RL-7 suitable for high-speed applications?

A: No. The AZV3002RL-7 has a propagation delay of 0.8µs, which is approximately 4 times longer than the MAX991EUA-T (210ns). It is suitable for low-speed, low-power applications only.

Q: What is the impact of different package types on PCB design?

A: The MAX991EUA-T uses 8-TSSOP/8-MSOP packaging. The LMC6762 series uses 8-SOIC packaging, and the AZV3002RL-7 uses 8-UFLGA packaging. Each package has different footprint dimensions, pin spacing, and thermal characteristics. PCB layout must be redesigned to accommodate the new package. Verify pin assignments and signal routing compatibility before implementation.

Q: Can I use LMC6762BIM/NOPB for new production?

A: No. LMC6762BIM/NOPB is in Last Time Buy status, meaning the manufacturer has announced discontinuation. This part should be used only for legacy system maintenance or repair. For new designs, use LMC6762AIMX/NOPB instead.

Q: What is the significance of MSL (Moisture Sensitivity Level) ratings?

A: MSL indicates the maximum time a component can be exposed to ambient moisture before assembly. MSL 1 (unlimited) parts like MAX991EUA-T and LMC6762AIMX/NOPB require no special moisture control. MSL 3 parts like AZV3002RL-7 must be stored in dry conditions and have a 168-hour shelf life after opening. Higher MSL ratings increase assembly complexity and cost.

Q: Which substitute part has the lowest power consumption?

A: The AZV3002RL-7 has the lowest quiescent current at 6µA typical, compared to 96µA for MAX991EUA-T and 20µA for LMC6762 series. However, the AZV3002RL-7 has longer propagation delay and higher input offset voltage, making it suitable only for low-speed, low-power applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, meeting environmental and regulatory requirements for lead-free manufacturing.