MAX281AEPA Equivalent & Substitute Parts

Part Overview

The MAX281AEPA is a Bessel, Low Pass Switched Capacitor Filter IC manufactured by Analog Devices Inc./Maxim Integrated. This 5th order filter operates at a 20kHz cutoff frequency and is housed in an 8-DIP through-hole package. The device is classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and component procurement.

Substiute Parts

MAX281AEPA

Analog Devices Inc./Maxim IntegratedIn Stock: 2862MAX281AEPA Datasheet

Current PartRFQ

MAX281AEPA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2363MAX281AEPA+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX281AEPA is determined by strict equivalence across the following critical parameters:

• Filter Topology: Bessel, Low Pass Switched Capacitor architecture
• Filter Order: 5th order configuration
• Cutoff Frequency: 20kHz center frequency
• Number of Filter Channels: Single filter per package
• Supply Voltage Range: 4.75V ~ 16V, ±2.375V ~ 8V dual supply capability
• Package Type: 8-DIP through-hole form factor with 0.300" (7.62mm) spacing
• Pin Configuration: 8-PDIP supplier device package

The MAX281AEPA+ qualifies as a direct substitute based on identical electrical specifications and mechanical compatibility across all parameters listed above.

Parameter Comparison

Engineering Selection Recommendations

The MAX281AEPA+ is the direct substitute for the obsolete MAX281AEPA. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin compatibility and functional equivalence in circuit applications.

The primary distinction between the two parts is product status and regulatory compliance. The MAX281AEPA is obsolete and RoHS non-compliant, while the MAX281AEPA+ is active and ROHS3 compliant. For new designs or systems requiring regulatory compliance with current environmental standards, the MAX281AEPA+ is the appropriate selection. For legacy system maintenance where the original part specification must be preserved, the MAX281AEPA remains available in current inventory.

Both parts maintain identical moisture sensitivity classification (MSL 1, Unlimited) and REACH status, indicating no additional handling or environmental restrictions apply to either variant.

Frequently Asked Questions (FAQ)

Q: Can the MAX281AEPA+ be used as a direct replacement for the MAX281AEPA in existing designs?

A: Yes. The MAX281AEPA+ is electrically and mechanically identical to the MAX281AEPA. Pin configuration, supply voltage requirements, filter characteristics, and package dimensions are equivalent. Direct substitution is possible without circuit modification.

Q: What is the significance of the "+" designation in the MAX281AEPA+ part number?

A: The "+" suffix indicates an updated version of the base MAX281 filter IC. In this case, the primary update is ROHS3 compliance status. The electrical and functional specifications remain unchanged from the original MAX281AEPA.

Q: Why is the MAX281AEPA classified as obsolete?

A: The MAX281AEPA has been superseded by the MAX281AEPA+. Analog Devices Inc./Maxim Integrated has transitioned production to the compliant variant. The original part remains available through existing inventory channels but is no longer in active production.

Q: Are there any differences in package handling or storage requirements between the MAX281AEPA and MAX281AEPA+?

A: No. Both parts share identical moisture sensitivity classification (MSL 1, Unlimited), indicating unlimited shelf life under standard storage conditions. No special handling or desiccant storage is required for either variant.

Q: Can the MAX281AEPA be used in applications requiring RoHS compliance?

A: No. The MAX281AEPA is RoHS non-compliant. Applications subject to RoHS regulations must use the MAX281AEPA+, which carries ROHS3 compliance certification.

Q: Are the supply voltage specifications identical between both parts?

A: Yes. Both the MAX281AEPA and MAX281AEPA+ operate across the same supply voltage range: 4.75V ~ 16V single supply or ±2.375V ~ 8V dual supply configuration.