NE521DR2 Equivalent & Substitute Parts

Part Overview

The NE521DR2 is a differential comparator IC manufactured by onsemi, housed in a 14-SOIC surface mount package. This component is classified as a linear integrated circuit with TTL output configuration, designed for applications requiring dual differential comparison functionality. The NE521DR2 is currently listed as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity. Active alternatives with identical electrical and mechanical specifications are available to ensure uninterrupted component sourcing.

Substiute Parts

NE521DR2

onsemiIn Stock: 889NE521DR2 Datasheet

Current PartRFQ

NE521DR2G

onsemiIn Stock: 4310NE521DR2G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NE521DR2 is determined by strict equivalence across the following critical parameters:

• Differential Comparator Configuration: Dual element (2) differential comparator architecture
• Output Logic Family: TTL output type
• Supply Voltage Range: ±4.75V ~ 5.25V dual supply operation
• Electrical Performance: Input offset voltage maximum of 7.5mV @ ±4.75V, input bias current maximum of 20µA @ ±5.25V, quiescent current maximum of 35mA, and propagation delay maximum of 12ns
• Package Specification: 14-SOIC surface mount package with 0.154" (3.90mm) width
• Operating Temperature Range: 0°C ~ 70°C

The NE521DR2G meets all these criteria and is therefore a direct functional and mechanical equivalent suitable for replacement in applications currently using the NE521DR2.

Parameter Comparison

Engineering Selection Recommendations

The NE521DR2G is the direct substitute for the obsolete NE521DR2. Both parts share identical electrical specifications, package configuration, and functional characteristics. The primary distinction is product status: the NE521DR2G is currently in active production, whereas the NE521DR2 is obsolete.

An additional advantage of the NE521DR2G is its ROHS3 compliance status, compared to the non-compliant status of the original NE521DR2. This compliance improvement aligns with current regulatory requirements for electronic components in many jurisdictions. Both parts maintain REACH Unaffected status and EAR99 export classification.

For new designs or production continuity, the NE521DR2G is the appropriate selection. Pin-for-pin compatibility, identical electrical performance, and active availability make this substitution a direct replacement without circuit modification.

Frequently Asked Questions (FAQ)

Q: Can the NE521DR2G be used as a direct replacement for the NE521DR2?

A: Yes. The NE521DR2G is electrically and mechanically identical to the NE521DR2. All electrical parameters, supply voltage requirements, output characteristics, and package specifications are equivalent. No circuit modifications are required.

Q: What is the primary reason to substitute the NE521DR2?

A: The NE521DR2 is obsolete. The NE521DR2G is the active equivalent from the same manufacturer, ensuring continued component availability and production support.

Q: Are there any compliance differences between these parts?

A: Yes. The NE521DR2G is ROHS3 compliant, while the NE521DR2 is RoHS non-compliant. Both maintain REACH Unaffected status. The improved compliance of the substitute part may be beneficial for applications subject to regulatory requirements.

Q: Is the package identical between the NE521DR2 and NE521DR2G?

A: Yes. Both parts use the 14-SOIC surface mount package with 0.154" (3.90mm) width. PCB footprints and assembly processes remain unchanged.

Q: What is the difference in packaging format?

A: The NE521DR2 is supplied in standard packaging, while the NE521DR2G is supplied in Cut Tape (CT) format. This is a packaging presentation difference only and does not affect component functionality or electrical performance.

Q: Are the electrical specifications identical?

A: Yes. Supply voltage range (±4.75V ~ 5.25V), input offset voltage (7.5mV @ ±4.75V), input bias current (20µA @ ±5.25V), quiescent current (35mA), and propagation delay (12ns) are identical across both parts.

Q: Can I use the NE521DR2G in existing designs without modification?

A: Yes. The NE521DR2G is a pin-for-pin, functionally equivalent replacement. No design changes, circuit modifications, or PCB alterations are necessary.