MAX983ESA Equivalent & Substitute Parts

Part Overview

The MAX983ESA is a dual comparator with integrated voltage reference in 8-SOIC surface mount packaging, manufactured by Analog Devices Inc./Maxim Integrated. This device is classified as obsolete, though functionally equivalent active alternatives are available. The MAX983ESA+ represents the active production variant of the same base product. Substitute parts are necessary to ensure design continuity and supply chain reliability for applications requiring dual comparator functionality with voltage reference integration.

Substiute Parts

MAX983ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 2293MAX983ESA Datasheet

Current PartRFQ

MAX983ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 4745MAX983ESA+ Datasheet

DirectRFQ

LTC1843IS8#PBF

Analog Devices Inc.In Stock: 2755LTC1843IS8#PBF Datasheet

DirectRFQ

LTC1843IS8#TRPBF

Analog Devices Inc.In Stock: 6091LTC1843IS8#TRPBF Datasheet

DirectRFQ

LTC1842CS8#PBF

Analog Devices Inc.In Stock: 1261LTC1842CS8#PBF Datasheet

MFR RecommendedRFQ

LTC1842CS8#TRPBF

Analog Devices Inc.In Stock: 2401LTC1842CS8#TRPBF Datasheet

MFR RecommendedRFQ

LTC1842IS8#PBF

Analog Devices Inc.In Stock: 3078LTC1842IS8#PBF Datasheet

MFR RecommendedRFQ

LTC1842IS8#TRPBF

Analog Devices Inc.In Stock: 8527LTC1842IS8#TRPBF Datasheet

MFR RecommendedRFQ

LTC1843CS8#PBF

Analog Devices Inc.In Stock: 2084LTC1843CS8#PBF Datasheet

MFR RecommendedRFQ

LTC1843CS8#TRPBF

Analog Devices Inc.In Stock: 3872LTC1843CS8#TRPBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX983ESA is determined by strict alignment across the following critical parameters:

Mandatory Matching Parameters:

• Voltage supply range: 2.5V ~ 11V, ±1.25V ~ 5.5V
• Input offset voltage: 10mV @ 5V maximum
• Hysteresis: 50mV
• Number of elements: 2
• Type: with Voltage Reference
• Package: 8-SOIC (0.154", 3.90mm Width)
• Mounting type: Surface Mount
• RoHS compliance: ROHS3 Compliant
• MSL rating: 1 (Unlimited)

Allowable Variations:

• Quiescent current: 5.7µA to 6µA (LTC1842/LTC1843 series operates at 5.7µA, within acceptable tolerance)
• Operating temperature: -40°C ~ 85°C (primary) or 0°C ~ 70°C (LTC1842/LTC1843 commercial grade variants)
• Output type: Standard push-pull (MAX983ESA) or open-drain (LTC1842/LTC1843 series)
• Propagation delay: Not specified for MAX983ESA; LTC1842/LTC1843 series specifies 12µs maximum
• Packaging format: Tube or Tape & Reel (TR)
• Product status: Active or obsolete

All substitute parts maintain electrical compatibility within the specified parameter envelope and are pin-compatible in 8-SOIC configuration.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: MAX983ESA+

The MAX983ESA+ is the direct active production equivalent of the obsolete MAX983ESA. It maintains identical electrical specifications, output type (standard push-pull), and operating temperature range (-40°C ~ 85°C). Selection of MAX983ESA+ eliminates any design modification requirements and ensures full functional compatibility. Product status is active with established supply availability.

Secondary Recommendations: LTC1842/LTC1843 Series

The LTC1842 and LTC1843 comparators from Analog Devices are functionally equivalent alternatives with the following considerations:

• All variants maintain the required voltage supply range, input offset voltage, hysteresis, and CMRR/PSRR specifications
• Quiescent current is 5.7µA, representing a 5% reduction from the MAX983ESA specification of 6µA
• Output type is open-drain rather than standard push-pull; circuit designs must accommodate pull-up resistor requirements
• All variants are ROHS3 compliant with MSL 1 rating
• Temperature-rated variants: LTC1842/LTC1843 with "C" suffix operate 0°C ~ 70°C (commercial grade); "I" suffix variants operate -40°C ~ 85°C (industrial grade)
• Packaging options: Tube or Tape & Reel formats available

Temperature Range Selection:

For applications requiring -40°C ~ 85°C operation, select LTC1842IS8 or LTC1843IS8 variants. For applications limited to 0°C ~ 70°C operation, LTC1842CS8 or LTC1843CS8 variants are acceptable.

Packaging Format Selection:

Tube packaging is standard for component-level procurement. Tape & Reel (TR) packaging is specified for high-volume automated assembly operations.

All substitute parts carry ROHS3 compliance and REACH unaffected status, matching the regulatory profile of the original MAX983ESA.

Frequently Asked Questions (FAQ)

Q: Can LTC1842/LTC1843 series parts directly replace MAX983ESA in existing designs?

A: LTC1842/LTC1843 parts are electrically compatible and pin-compatible in 8-SOIC packaging. However, the output stage differs: MAX983ESA uses standard push-pull output, while LTC1842/LTC1843 use open-drain output. Designs using the MAX983ESA output directly must be modified to include pull-up resistors when switching to LTC1842/LTC1843 variants. Verify output loading requirements in your application before substitution.

Q: What is the difference between LTC1842 and LTC1843?

A: Both LTC1842 and LTC1843 are dual comparators with voltage reference in 8-SOIC packaging. The primary distinction is temperature rating: LTC1842 is available in commercial (0°C ~ 70°C) and industrial (-40°C ~ 85°C) grades; LTC1843 follows the same temperature grading. Both maintain identical electrical specifications for voltage supply, input offset, hysteresis, and CMRR/PSRR. Select based on your application's operating temperature requirements.

Q: What does the suffix notation mean (e.g., #PBF, #TRPBF)?

A: The suffix indicates packaging format and lead finish. #PBF denotes Tube packaging with lead-free solder finish. #TRPBF denotes Tape & Reel packaging with lead-free solder finish. Both formats contain identical die and electrical performance; packaging selection depends on procurement and assembly methodology.

Q: Is MAX983ESA+ a true equivalent to MAX983ESA?

A: Yes. MAX983ESA+ is the active production variant of the MAX983ESA base product. Electrical specifications, output type, operating temperature range, and package are identical. The "+" suffix indicates active product status and updated packaging designation. No design modifications are required when transitioning from MAX983ESA to MAX983ESA+.

Q: Can I use LTC1842IS8 in place of LTC1843IS8?

A: Yes. Both LTC1842IS8 and LTC1843IS8 maintain identical electrical specifications and -40°C ~ 85°C operating temperature range. The primary difference is manufacturing lineage and part number designation. Both are active products with equivalent performance characteristics. Selection can be based on supply availability and procurement preference.

Q: What is the significance of the quiescent current difference (6µA vs 5.7µA)?

A: The LTC1842/LTC1843 series operates at 5.7µA maximum quiescent current, compared to 6µA for MAX983ESA. This 5% reduction represents improved power efficiency and is within acceptable tolerance for most applications. For power-sensitive designs, the LTC1842/LTC1843 variants offer a marginal advantage. This difference does not affect functional compatibility.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts (MAX983ESA+, LTC1842 series, LTC1843 series) are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Regulatory compliance is maintained across all alternatives.