MAX972ESA Equivalent & Substitute Parts

Part Overview

The MAX972ESA is a dual-channel general-purpose comparator with integrated voltage reference and open-drain output configuration, housed in an 8-SOIC surface-mount package. This device is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and production continuity. The comparator operates across a wide supply voltage range (2.5V to 11V single supply, ±1.25V to ±5.5V dual supply) and is suitable for precision voltage monitoring and signal conditioning applications.

Substiute Parts

MAX972ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 2348MAX972ESA Datasheet

Current PartRFQ

MAX972ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2241MAX972ESA+ Datasheet

DirectRFQ

LTC1441CS8#TRPBF

Analog Devices Inc.In Stock: 890LTC1441CS8#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX972ESA is determined by the following critical parameters:

Primary Substitution Criteria:

• Dual-channel comparator architecture (2 elements minimum)
• 8-SOIC surface-mount package with 0.154" width (3.90mm)
• Supply voltage range compatibility: minimum 2.5V single supply or ±1.25V dual supply
• Input offset voltage specification of 10mV or better at 5V
• CMRR and PSRR performance of 80dB or greater
• Operating temperature range encompassing -40°C to 85°C

Identified Substitute Categories:

1. Direct Pin-Compatible Replacement (MAX972ESA+): Identical electrical specifications and package, differing only in product status (Active vs. Obsolete) and RoHS compliance status.

2. Functional Equivalent with Output Type Variation (LTC1441CS8#TRPBF): Meets core comparator functionality with dual channels and identical package geometry. Output configuration differs (CMOS/TTL vs. Open-Drain), requiring circuit-level evaluation. Operating temperature range is narrower (0°C to 70°C). Supply voltage floor is slightly lower (2V vs. 2.5V). Quiescent current is marginally higher (5.7µA vs. 4µA).

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification Required):

MAX972ESA+ is the primary substitute. It maintains identical electrical specifications, package geometry, and output configuration. The transition from Obsolete to Active product status ensures long-term availability and supply chain stability. ROHS3 compliance aligns with current manufacturing and environmental regulations, eliminating potential procurement restrictions in regulated markets.

For Functional Equivalence (Circuit Evaluation Required):

LTC1441CS8#TRPBF provides functional comparator capability with the same dual-channel architecture and package footprint. Selection of this device requires verification of output stage compatibility, as CMOS/TTL output differs fundamentally from open-drain configuration. The narrower operating temperature range (0°C to 70°C vs. -40°C to 85°C) must be evaluated against application requirements. The marginally higher quiescent current (5.7µA vs. 4µA) has negligible impact in most applications but should be confirmed for battery-powered or ultra-low-power designs. ROHS3 compliance and Active product status provide supply assurance.

Frequently Asked Questions (FAQ)

Q: Can MAX972ESA+ be used as a direct drop-in replacement for MAX972ESA?

A: Yes. MAX972ESA+ is electrically and mechanically identical to MAX972ESA. The primary differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modifications are required.

Q: What is the key difference between MAX972ESA and LTC1441CS8#TRPBF?

A: The primary difference is output configuration. MAX972ESA features open-drain output, while LTC1441CS8#TRPBF provides CMOS/TTL output. This affects pull-up resistor requirements and output voltage swing characteristics. Additionally, LTC1441CS8#TRPBF has a narrower operating temperature range (0°C to 70°C vs. -40°C to 85°C).

Q: Is LTC1441CS8#TRPBF suitable for applications requiring -40°C operation?

A: No. LTC1441CS8#TRPBF is rated for 0°C to 70°C operation only. Applications requiring -40°C to 85°C operation must use MAX972ESA or MAX972ESA+.

Q: Are all substitute parts in the same package?

A: Yes. MAX972ESA, MAX972ESA+, and LTC1441CS8#TRPBF are all housed in 8-SOIC packages with identical 0.154" (3.90mm) width, enabling direct PCB footprint compatibility.

Q: What is the significance of RoHS compliance for this comparator?

A: ROHS3 compliance indicates the device meets current environmental and manufacturing standards, ensuring compatibility with modern supply chains and regulatory requirements. RoHS non-compliant devices may face procurement restrictions in certain markets or applications.

Q: Can I use LTC1441CS8#TRPBF in a design originally specified for MAX972ESA?

A: Functional substitution is possible only after circuit-level evaluation. The output stage difference (CMOS/TTL vs. open-drain) requires verification of pull-up resistor values, output voltage levels, and downstream logic compatibility. Temperature range compatibility must also be confirmed.