MAX977EEE-T Equivalent & Substitute Parts

Part Overview

The MAX977EEE-T is a dual-channel general-purpose comparator manufactured by Analog Devices Inc./Maxim Integrated, featuring CMOS rail-to-rail TTL output architecture in a 16-QSOP surface-mount package. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs or production continuity. The part operates across a 2.7V to 5.25V supply range with low input offset voltage and integrated hysteresis, making it suitable for precision signal conditioning applications.

Substiute Parts

MAX977EEE-T

Analog Devices Inc./Maxim IntegratedIn Stock: 835MAX977EEE-T Datasheet

Current PartRFQ

ALD2303PAL

Advanced Linear Devices Inc.In Stock: 1096ALD2303PAL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX977EEE-T requires evaluation against the following critical parameters that define functional equivalence:

Functional Requirements:

• Dual-channel comparator architecture (2 elements minimum)
• General-purpose comparator classification
• CMOS/TTL-compatible output stage
• Supply voltage compatibility within 2.7V ~ 5.25V range

Electrical Performance Criteria:

• Input offset voltage specification ≤ 4mV
• Input bias current specification ≤ 0.1µA
• Quiescent current specification ≤ 500µA
• Hysteresis specification defined

Environmental & Compliance Requirements:

• Operating temperature range encompassing -40°C ~ 85°C or subset thereof
• ROHS3 compliance
• REACH unaffected status

The ALD2303PAL qualifies as a substitute based on dual-element general-purpose comparator architecture with CMOS/TTL output compatibility. However, package form factor differs (8-DIP through-hole versus 16-QSOP surface-mount), and operating temperature range is narrower (0°C ~ 70°C versus -40°C ~ 85°C). Supply voltage range is broader (3V ~ 12V, ±1.5V ~ 6V), and input bias current specification is superior (0.001µA versus 0.1µA).

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration - Product Status: The MAX977EEE-T is obsolete. The ALD2303PAL is actively manufactured by Advanced Linear Devices Inc., ensuring long-term availability and supply chain continuity.

Compliance & Certification: Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent applications.

Application-Specific Constraints:

For applications requiring the -40°C ~ 85°C operating temperature range of the MAX977EEE-T, the ALD2303PAL (0°C ~ 70°C) is unsuitable without thermal management modifications or alternative sourcing.

For surface-mount assembly processes, the ALD2303PAL through-hole 8-DIP package necessitates PCB redesign and assembly process modification. Direct pin-for-pin substitution is not possible due to package incompatibility.

For applications tolerant of 0°C ~ 70°C operation and capable of accommodating through-hole assembly, the ALD2303PAL provides superior electrical performance in input bias current (0.001µA versus 0.1µA) and quiescent current (40µA versus 500µA), with broader supply voltage range compatibility.

Frequently Asked Questions (FAQ)

Q: Can the ALD2303PAL directly replace the MAX977EEE-T on existing PCBs?

A: No. The MAX977EEE-T uses 16-QSOP surface-mount packaging, while the ALD2303PAL uses 8-DIP through-hole packaging. PCB layout redesign and assembly process modification are required.

Q: What is the primary reason for substitution?

A: The MAX977EEE-T is obsolete. The ALD2303PAL is an active product with equivalent dual-channel general-purpose comparator functionality and superior electrical performance in key parameters.

Q: Are there temperature range limitations with the ALD2303PAL?

A: Yes. The ALD2303PAL operates from 0°C ~ 70°C, which is narrower than the MAX977EEE-T range of -40°C ~ 85°C. Applications requiring extended temperature operation must verify thermal compatibility or source alternative parts.

Q: How do the electrical specifications compare?

A: The ALD2303PAL provides superior input bias current (0.001µA versus 0.1µA) and quiescent current (40µA versus 500µA). The MAX977EEE-T has lower input offset voltage (2mV versus 4mV). Both are general-purpose comparators with TTL-compatible outputs.

Q: What supply voltage ranges are supported?

A: The MAX977EEE-T operates at 2.7V ~ 5.25V. The ALD2303PAL supports 3V ~ 12V and ±1.5V ~ 6V, providing broader voltage compatibility. Both support standard 5V logic systems.

Q: Are both parts RoHS compliant?

A: Yes. Both the MAX977EEE-T and ALD2303PAL are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.