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MAX985EXK-T Equivalent & Substitute Parts
Part Overview
The MAX985EXK-T is a general-purpose CMOS comparator manufactured by Analog Devices Inc./Maxim Integrated, designed for applications requiring rail-to-rail operation with TTL-compatible push-pull output. The device is packaged in a 5-TSSOP (SC-70-5) surface-mount configuration and operates across a supply voltage range of 2.5V to 5.5V (single supply) or ±1.25V to ±2.75V (dual supply).
The MAX985EXK-T is classified as obsolete. Identifying equivalent substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support ongoing production or maintenance of systems utilizing this comparator.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MAX985EXK-T |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Category | Linear |
| Type | General Purpose Comparator |
| Number of Elements | 1 |
| Output Type | CMOS, Push-Pull, Rail-to-Rail, TTL |
| Voltage - Supply, Single/Dual (±) | 2.5V ~ 5.5V, ±1.25V ~ 2.75V |
| Voltage - Input Offset (Max) | 5mV @ 5.5V |
| Current - Input Bias (Max) | 1pA @ 5.5V |
| Current - Quiescent (Max) | 24µA |
| CMRR, PSRR (Typ) | 80dB CMRR, 80dB PSRR |
| Propagation Delay (Max) | 450ns |
| Hysteresis | ±3mV |
| Operating Temperature | -40°C ~ 85°C |
| Package / Case | 5-TSSOP, SC-70-5, SOT-353 |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| REACH Status | REACH Unaffected |
Substitute Part Grouping Explanation
Substitution of the MAX985EXK-T is determined by strict equivalence across the following critical parameters:
- Functional Type: General-purpose CMOS comparator with single element
- Output Configuration: CMOS, push-pull, rail-to-rail, TTL-compatible output
- Supply Voltage Range: 2.5V to 5.5V (single supply) or ±1.25V to ±2.75V (dual supply)
- Electrical Performance: Input offset voltage (5mV max @ 5.5V), input bias current (1pA max @ 5.5V), quiescent current (24µA max), CMRR/PSRR (80dB typical), propagation delay (450ns max), hysteresis (±3mV)
- Package Specification: 5-TSSOP, SC-70-5, SOT-353 surface-mount package
- Environmental Compliance: ROHS3 compliant, REACH unaffected, MSL 1
The MAX985EXK+T meets all substitution criteria as a parametric equivalent with identical electrical specifications and package configuration.
Parameter Comparison
| Parameter | MAX985EXK-T (Main Part) | MAX985EXK+T (Substitute) |
|---|---|---|
| Manufacturer Part Number | MAX985EXK-T | MAX985EXK+T |
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Product Status | Obsolete | Active |
| Type | General Purpose | General Purpose |
| Number of Elements | 1 | 1 |
| Output Type | CMOS, Push-Pull, Rail-to-Rail, TTL | CMOS, Push-Pull, Rail-to-Rail, TTL |
| Voltage - Supply, Single/Dual (±) | 2.5V ~ 5.5V, ±1.25V ~ 2.75V | 2.5V ~ 5.5V, ±1.25V ~ 2.75V |
| Voltage - Input Offset (Max) | 5mV @ 5.5V | 5mV @ 5.5V |
| Current - Input Bias (Max) | 1pA @ 5.5V | 1pA @ 5.5V |
| Current - Quiescent (Max) | 24µA | 24µA |
| CMRR, PSRR (Typ) | 80dB CMRR, 80dB PSRR | 80dB CMRR, 80dB PSRR |
| Propagation Delay (Max) | 450ns | 450ns |
| Hysteresis | ±3mV | ±3mV |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
| Package / Case | 5-TSSOP, SC-70-5, SOT-353 | 5-TSSOP, SC-70-5, SOT-353 |
| Mounting Type | Surface Mount | Surface Mount |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The MAX985EXK+T is the direct substitute for the obsolete MAX985EXK-T. Both parts share identical electrical specifications, package configuration, and environmental compliance certifications. The primary distinction is product status: the MAX985EXK-T is obsolete, while the MAX985EXK+T is active and currently available.
For new designs or ongoing production requiring the MAX985 comparator functionality, the MAX985EXK+T is the appropriate selection. The active product status ensures continued availability, supply chain support, and manufacturer technical documentation. Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.
Frequently Asked Questions (FAQ)
Q: Can the MAX985EXK+T directly replace the MAX985EXK-T in existing designs?
A: Yes. The MAX985EXK+T is a parametric equivalent with identical electrical specifications, output characteristics, supply voltage range, and SC-70-5 package configuration. No circuit modifications are required for direct substitution.
Q: What is the difference between MAX985EXK-T and MAX985EXK+T?
A: The parts are electrically and functionally identical. The difference is in product status and packaging format. The MAX985EXK-T is obsolete; the MAX985EXK+T is active. The MAX985EXK+T is supplied in Cut Tape (CT) and Digi-Reel® packaging, whereas the MAX985EXK-T packaging format is not specified in the provided data.
Q: Are both parts compatible with the same PCB layout and footprint?
A: Yes. Both parts use the 5-TSSOP (SC-70-5, SOT-353) surface-mount package with identical pin configuration and footprint requirements.
Q: What are the key electrical parameters that define substitution compatibility?
A: Substitution is based on matching the following parameters: general-purpose comparator type, CMOS push-pull rail-to-rail TTL output, 2.5V to 5.5V single supply (or ±1.25V to ±2.75V dual supply), 5mV input offset voltage, 1pA input bias current, 24µA quiescent current, 80dB CMRR/PSRR, 450ns propagation delay, and ±3mV hysteresis.
Q: Are there any compliance or regulatory differences between the two parts?
A: No. Both the MAX985EXK-T and MAX985EXK+T are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity level) classification.
Q: Why is the MAX985EXK-T obsolete?
A: Product obsolescence is determined by the manufacturer. The MAX985EXK+T remains active and is the recommended part for current applications.
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