MAX922MSA/PR-T Equivalent & Substitute Parts

Part Overview

The MAX922MSA/PR-T is a general-purpose CMOS/TTL comparator manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface-mount package. This device is classified as obsolete, making identification of compatible substitute parts essential for ongoing production support, design updates, and inventory management. The comparator operates across a wide supply voltage range (2.5V to 11V single supply, or ±1.25V to ±5.5V dual supply) and is suitable for applications requiring low-power comparison operations with TTL/CMOS output compatibility.

Substiute Parts

MAX922MSA/PR-T

Analog Devices Inc./Maxim IntegratedIn Stock: 1151MAX922MSA/PR-T Datasheet

Current PartRFQ

MAX922MSA/PR+T

Analog Devices Inc./Maxim IntegratedIn Stock: 1958MAX922MSA/PR+T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX922MSA/PR-T is determined by the following critical parameters:

Electrical Compatibility:

• Supply voltage range: 2.5V ~ 11V (single) / ±1.25V ~ 5.5V (dual)
• Input offset voltage: 10mV @ 5V maximum
• Quiescent current: 3.2µA maximum
• Propagation delay: 12µs maximum
• Operating temperature range: -55°C ~ 125°C
• Output type: CMOS and TTL compatible

Mechanical Compatibility:

• Package type: 8-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount

Functional Compatibility:

• Device category: Linear comparator
• Type: General Purpose
• Number of elements: 1 (single comparator)

The MAX922MSA/PR+T qualifies as a direct substitute based on matching all critical electrical parameters, identical package specifications, and compatible functional characteristics. The substitute part maintains the same supply voltage range, input offset voltage specification, quiescent current limit, propagation delay, and operating temperature range as the original part.

Parameter Comparison

Engineering Selection Recommendations

The MAX922MSA/PR+T is a qualified substitute for the obsolete MAX922MSA/PR-T based on the following engineering criteria:

Electrical Performance: Both parts maintain identical supply voltage ranges (2.5V ~ 11V single / ±1.25V ~ 5.5V dual), input offset voltage specifications (10mV @ 5V), quiescent current limits (3.2µA), propagation delay (12µs), and operating temperature range (-55°C ~ 125°C). These parameters ensure functional equivalence in existing circuit designs.

Package and Mechanical Compatibility: Both parts use the 8-SOIC (0.154", 3.90mm Width) surface-mount package with identical pinout and footprint, enabling direct PCB-level substitution without layout modifications.

Product Status and Compliance: The substitute part (MAX922MSA/PR+T) is currently in active production status, ensuring long-term availability and supply chain continuity. The substitute achieves ROHS3 compliance, meeting current environmental and regulatory requirements, whereas the original part is RoHS non-compliant. Both parts maintain MSL Level 1 (Unlimited) moisture sensitivity classification.

Enhanced Capabilities: The substitute part provides additional functionality including dual comparator elements (versus single element in original), Rail-to-Rail output capability, specified output current (50mA typical), and documented CMRR/PSRR performance (40dB each). These enhancements do not conflict with original part specifications and provide design flexibility for new applications.

Frequently Asked Questions (FAQ)

Q: Can the MAX922MSA/PR+T be used as a direct replacement for the MAX922MSA/PR-T in existing designs?

A: Yes. Both parts share identical electrical specifications for supply voltage range, input offset voltage, quiescent current, propagation delay, and operating temperature. The 8-SOIC package footprint is identical, enabling direct PCB substitution without circuit modifications.

Q: What is the difference in the number of comparator elements between these parts?

A: The original MAX922MSA/PR-T contains one comparator element, while the substitute MAX922MSA/PR+T contains two comparator elements within the same 8-SOIC package. In applications using only one comparator, the second element remains unused but does not affect circuit operation.

Q: Are there any output capability differences?

A: The substitute part specifies a typical output current of 50mA, whereas the original part does not specify this parameter. This represents an enhancement in the substitute part's output drive capability. Applications designed for the original part will operate within the substitute's output specifications.

Q: Does the Rail-to-Rail output capability of the substitute part affect compatibility?

A: No. Rail-to-Rail output is a superset capability that does not conflict with standard CMOS/TTL output operation. Circuits designed for standard CMOS/TTL output will function correctly with the Rail-to-Rail output variant.

Q: What is the significance of the RoHS compliance difference?

A: The original part is RoHS non-compliant, while the substitute is ROHS3 compliant. For new designs or production environments with RoHS requirements, the substitute part meets current regulatory standards. For legacy systems without RoHS mandates, both parts are functionally equivalent.

Q: Are the CMRR and PSRR specifications critical for substitution?

A: The substitute part specifies CMRR and PSRR performance (40dB each), while the original part does not provide these specifications. The specified performance of the substitute part meets or exceeds typical comparator performance and does not introduce incompatibility with original designs.

Q: Is the moisture sensitivity level the same for both parts?

A: Yes. Both parts are classified as MSL Level 1 (Unlimited), indicating no moisture sensitivity restrictions for storage, handling, or reflow processes.

Q: Can the substitute part be used in high-temperature applications?

A: Yes. Both parts maintain the same operating temperature range of -55°C ~ 125°C, ensuring equivalent performance across the full temperature spectrum.