MAX281ACWE Equivalent & Substitute Parts

Part Overview

The MAX281ACWE is a 5th-order Bessel low-pass switched capacitor filter IC with a 20kHz cutoff frequency, manufactured by Analog Devices Inc./Maxim Integrated. This component is classified as an interface IC and is packaged in a 16-SOIC surface mount package. The device operates across a supply voltage range of 4.75V to 16V (or ±2.375V to 8V for dual supply configurations).

The MAX281ACWE is currently listed as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this filter topology.

Substiute Parts

MAX281ACWE

Analog Devices Inc./Maxim IntegratedIn Stock: 1169MAX281ACWE Datasheet

Current PartRFQ

MAX281ACWE+

Analog Devices Inc./Maxim IntegratedIn Stock: 826MAX281ACWE+ Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX281ACWE is determined by the following critical parameters:

• Filter Topology: Bessel, low-pass switched capacitor architecture
• Filter Order: 5th order
• Cutoff Frequency: 20kHz
• Package Type: 16-SOIC surface mount
• Supply Voltage Range: 4.75V ~ 16V or ±2.375V ~ 8V
• Number of Filter Channels: Single filter per IC
• Moisture Sensitivity: MSL 1 (Unlimited)

Parts meeting all these electrical and mechanical parameters are classified as direct substitutes. The MAX281ACWE+ is identified as a direct substitute based on matching filter specifications, package configuration, and supply voltage requirements.

Parameter Comparison

Engineering Selection Recommendations

The MAX281ACWE+ is the identified direct substitute for the obsolete MAX281ACWE. Both parts share identical electrical specifications, filter characteristics, and package configuration. The primary distinction is product status and compliance posture.

The MAX281ACWE+ is currently in active production status, ensuring supply chain availability and long-term sourcing reliability. Additionally, the MAX281ACWE+ achieves ROHS3 compliance, whereas the original MAX281ACWE is RoHS non-compliant. Both parts maintain REACH Unaffected status and identical export classification (EAR99).

For new designs or production transitions, the MAX281ACWE+ is the appropriate selection. For legacy system maintenance requiring exact form-fit-function compatibility, the MAX281ACWE+ provides electrical and mechanical equivalence with improved compliance status.

Frequently Asked Questions (FAQ)

Q: Can the MAX281ACWE+ be used as a direct replacement for the MAX281ACWE?

A: Yes. The MAX281ACWE+ is a direct substitute. Both parts feature identical 5th-order Bessel low-pass filter topology, 20kHz cutoff frequency, 16-SOIC package configuration, and supply voltage specifications. Electrical performance and pinout are equivalent.

Q: What is the primary difference between these two parts?

A: The MAX281ACWE is obsolete, while the MAX281ACWE+ is in active production. The MAX281ACWE+ also achieves ROHS3 compliance, whereas the original part is RoHS non-compliant. Electrical and mechanical specifications are identical.

Q: Are there any packaging differences between the MAX281ACWE and MAX281ACWE+?

A: No. Both parts use the 16-SOIC surface mount package with identical dimensions (0.295" width, 7.50mm). Pinout and mechanical footprint are equivalent.

Q: What supply voltage range does the MAX281ACWE support?

A: The device operates at 4.75V to 16V (single supply) or ±2.375V to 8V (dual supply configuration).

Q: Is the MAX281ACWE+ suitable for applications requiring RoHS compliance?

A: Yes. The MAX281ACWE+ is ROHS3 compliant. If RoHS compliance is a design requirement, the MAX281ACWE+ is the appropriate selection.

Q: What is the moisture sensitivity level for these parts?

A: Both the MAX281ACWE and MAX281ACWE+ have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.