MAX9031AXK-T Equivalent & Substitute Parts

Part Overview

The MAX9031AXK-T is a general-purpose comparator IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 5-TSSOP (SC-70-5) surface-mount package. This device features push-pull, rail-to-rail output architecture with a single comparator element, designed for applications requiring low-power signal comparison across a 2.5V to 5.5V supply range.

The MAX9031AXK-T is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements. Substitute parts must maintain functional compatibility across electrical performance parameters and mechanical packaging constraints.

Substiute Parts

MAX9031AXK-T

Analog Devices Inc./Maxim IntegratedIn Stock: 1091MAX9031AXK-T Datasheet

Current PartRFQ

MAX9031AXK+T

Analog Devices Inc./Maxim IntegratedIn Stock: 29217MAX9031AXK+T Datasheet

Parametric EquivalentRFQ

BU5265HFV-TR

Rohm SemiconductorIn Stock: 18196BU5265HFV-TR Datasheet

MFR RecommendedRFQ

FAN156L6X

onsemiIn Stock: 50313FAN156L6X Datasheet

MFR RecommendedRFQ

ISL28915FH6Z-T7

Renesas Electronics CorporationIn Stock: 17516ISL28915FH6Z-T7 Datasheet

MFR RecommendedRFQ

LMV7219M5X/NOPB

National SemiconductorIn Stock: 41205LMV7219M5X/NOPB Datasheet

MFR RecommendedRFQ

TS331ICT

STMicroelectronicsIn Stock: 1722TS331ICT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX9031AXK-T is determined by the following critical parameters:

Electrical Compatibility Criteria:

• Single comparator element (Number of Elements = 1)
• Supply voltage range must encompass or overlap with 2.5V ~ 5.5V
• Output type must support push-pull configuration
• Rail-to-rail output capability preferred for direct replacement
• Operating temperature range must cover -40°C ~ 125°C or be compatible with application requirements
• Input offset voltage, input bias current, and propagation delay must be within acceptable application tolerances

Mechanical Compatibility Criteria:

• Surface-mount package format (5-pin or 6-pin configurations acceptable)
• Pin count and pinout compatibility with PCB layout
• Package footprint compatibility or documented rework procedures

Compliance & Certification:

• ROHS3 compliance required
• MSL rating of 1 (Unlimited) preferred

Substitute parts are grouped into two categories: parametric equivalents (identical electrical specifications and package) and manufacturer-recommended alternatives (functionally equivalent with acceptable parameter variations).

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (Identical Specifications):

MAX9031AXK+T is the active production equivalent of MAX9031AXK-T. This part maintains identical electrical specifications, package format (5-TSSOP, SC-70-5), and compliance certifications. Selection of MAX9031AXK+T eliminates obsolescence risk while preserving all design parameters. This part is available in higher inventory quantities (29,200 units) and carries Active product status.

Functionally Compatible Alternatives:

TS331ICT (STMicroelectronics) provides the closest functional match with identical package format (5-TSSOP, SC-70-5) and extended operating temperature range (-40°C ~ 125°C). The primary design consideration is output type: TS331ICT features open-drain output versus the push-pull, rail-to-rail output of MAX9031AXK-T. This substitution requires circuit-level evaluation to confirm pull-up resistor requirements and output drive capability compatibility.

ISL28915FH6Z-T7 (Renesas Electronics Corporation) offers superior CMRR/PSRR performance (98dB/100dB) and extended operating temperature range (-40°C ~ 125°C). Package format differs (SOT-23-6 versus SC-70-5), requiring PCB layout modification. Input offset voltage (2mV @ 5V) and quiescent current (600nA) represent acceptable parameter variations for most applications.

LMV7219M5X/NOPB (National Semiconductor) provides the fastest propagation delay (20ns) and lowest quiescent current (1.8mA) among alternatives. Operating temperature range is limited to -40°C ~ 85°C. Package format (SOT-23-5) differs from the original, requiring PCB rework. This selection is appropriate for timing-critical applications where temperature range limitation is acceptable.

BU5265HFV-TR (Rohm Semiconductor) and FAN156L6X (onsemi) are viable alternatives with extended supply voltage ranges. Both require package format changes and present trade-offs in propagation delay and input offset voltage specifications.

All substitute parts maintain ROHS3 compliance and MSL rating of 1 (Unlimited), ensuring compatibility with standard manufacturing and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX9031AXK+T be used as a direct replacement for MAX9031AXK-T?

A: Yes. MAX9031AXK+T is the active production equivalent with identical electrical specifications, package format (5-TSSOP, SC-70-5), and compliance certifications. The only difference is product status (Active versus Obsolete) and packaging format (Cut Tape & Digi-Reel versus standard tape). No circuit modifications are required.

Q: What is the primary difference between MAX9031AXK-T and TS331ICT?

A: Both devices use the 5-TSSOP (SC-70-5) package and support the -40°C ~ 125°C operating temperature range. The critical difference is output type: MAX9031AXK-T features push-pull, rail-to-rail output, while TS331ICT features open-drain output. Open-drain output requires external pull-up resistor and may affect output voltage swing and drive capability. Circuit evaluation is required before substitution.

Q: Why does ISL28915FH6Z-T7 show a propagation delay of 260µs instead of nanoseconds?

A: The ISL28915FH6Z-T7 propagation delay specification (260µs) represents a different measurement condition or device variant. This significantly longer delay may impact timing-sensitive applications. Verify datasheet specifications and application timing requirements before selection.

Q: Can I use a 6-pin package substitute in place of the 5-pin SC-70-5 package?

A: Package format changes (such as 6-pin alternatives like FAN156L6X or ISL28915FH6Z-T7) require PCB layout modification and rework procedures. Pin assignments and footprints differ between package types. Mechanical compatibility must be verified through datasheet cross-reference and PCB design review before implementation.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts carry ROHS3 compliance certification except LMV7219M5X/NOPB, for which RoHS status is not specified in the provided data. Verify RoHS compliance status with the manufacturer or distributor before final selection if regulatory compliance is a design requirement.

Q: What is the significance of MSL rating 1 (Unlimited)?

A: MSL (Moisture Sensitivity Level) rating of 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. These parts can be stored indefinitely without special humidity control and do not require baking before reflow soldering. All listed parts maintain this rating, ensuring compatibility with standard manufacturing processes.

Q: Which substitute offers the best low-power performance?

A: ISL28915FH6Z-T7 provides the lowest quiescent current at 600nA, making it suitable for battery-powered or ultra-low-power applications. However, its significantly longer propagation delay (260µs) may be unsuitable for timing-critical circuits. Application requirements must be evaluated against all performance parameters.