MAX981EPA+ Equivalent & Substitute Parts

Part Overview

The MAX981EPA+ is a comparator with integrated voltage reference in an 8-DIP package, manufactured by Analog Devices Inc./Maxim Integrated. This device is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The MAX981EPA+ provides single-element comparison functionality with built-in voltage reference capability, suitable for applications requiring precision voltage monitoring and signal comparison in industrial and consumer electronics.

Substiute Parts

MAX981EPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1148MAX981EPA+ Datasheet

Current PartRFQ

LTC1440CN8#PBF

Analog Devices Inc.In Stock: 943LTC1440CN8#PBF Datasheet

MFR RecommendedRFQ

LTC1440IN8#PBF

Analog Devices Inc.In Stock: 1006LTC1440IN8#PBF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MAX981EPA+ are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Electrical Compatibility Criteria:

• Package type: 8-DIP (0.300", 7.62mm) with through-hole mounting
• Voltage supply range: Must accommodate the operating range of 2.5V ~ 11V single supply or ±1.25V ~ 5.5V dual supply
• Input offset voltage: Maximum 10mV @ 5V
• Hysteresis: 50mV
• CMRR and PSRR: 80dB minimum for both parameters
• Quiescent current: Maximum 4µA

Compliance & Certification:

• RoHS3 compliance required
• MSL rating of 1 (Unlimited)
• REACH unaffected status

The LTC1440CN8#PBF and LTC1440IN8#PBF meet all electrical and mechanical substitution criteria. Both devices are manufactured by Analog Devices Inc., maintain identical package specifications, and satisfy all key electrical parameters. The primary distinction between these substitutes is the operating temperature range and product status.

Parameter Comparison

Engineering Selection Recommendations

LTC1440IN8#PBF is the primary substitute for MAX981EPA+ applications. This device maintains identical operating temperature range (-40°C ~ 85°C), ensuring compatibility with designs requiring extended temperature operation. Both devices are active products with current manufacturing support, ROHS3 compliance, and unlimited moisture sensitivity ratings. The LTC1440IN8#PBF is available in higher inventory (971 Pcs) and provides long-term supply continuity.

LTC1440CN8#PBF is a secondary substitute suitable for applications operating within the 0°C ~ 70°C temperature range. This device is also an active product with ROHS3 compliance and unlimited MSL rating. Selection of this part should be limited to designs where the reduced operating temperature range does not conflict with application requirements.

Both LTC1440 variants are manufactured by Analog Devices Inc., the same parent company of Maxim Integrated, ensuring consistent quality and reliability standards.

Frequently Asked Questions (FAQ)

Q: Can LTC1440CN8#PBF replace MAX981EPA+ in all applications?

A: LTC1440CN8#PBF is suitable only for applications operating within 0°C ~ 70°C. If your design requires operation at temperatures below 0°C or above 70°C, use LTC1440IN8#PBF instead.

Q: What are the key electrical differences between MAX981EPA+ and LTC1440 substitutes?

A: The LTC1440 series maintains identical input offset voltage (10mV @ 5V), hysteresis (50mV), and CMRR/PSRR specifications (80dB). Quiescent current is slightly higher in LTC1440 devices (4.4µA vs. 4µA), and the minimum supply voltage is marginally lower (2V vs. 2.5V for single supply).

Q: Are the packages mechanically identical?

A: Yes. Both MAX981EPA+ and LTC1440CN8#PBF/LTC1440IN8#PBF use 8-DIP (0.300", 7.62mm) through-hole packages with identical pinout and mechanical dimensions.

Q: Do the substitute parts have the same compliance certifications?

A: Yes. All three devices are ROHS3 compliant, have MSL rating of 1 (Unlimited), and REACH unaffected status.

Q: Which substitute should I select for new designs?

A: LTC1440IN8#PBF is recommended for new designs due to its active product status, extended operating temperature range matching the original MAX981EPA+, and higher current inventory availability.