SA571NG Audio Compandor IC - Equivalent & Substitute Parts

Part Overview

The SA571NG is a 2-channel audio compandor integrated circuit manufactured by onsemi, designed for consumer audio and telecommunication system applications. This device operates as a Through Hole 16-DIP package and has reached obsolete product status. Due to its obsolescence, identifying functionally equivalent substitute parts with compatible electrical and mechanical specifications is essential for system redesign, production continuity, and component sourcing.

Substiute Parts

SA571NG

onsemiIn Stock: 2031SA571NG Datasheet

Current PartRFQ

SA571DR2G

onsemiIn Stock: 20096SA571DR2G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SA571NG is determined by the following critical parameters:

• Base Product Number: Both parts share the SA571 base designation, confirming they are variants of the same functional device
• Function & Channel Configuration: Both maintain 2-channel compandor functionality with analog interface
• Electrical Specifications: Identical voltage supply range (6V ~ 18V) and operating temperature range (-40°C ~ 85°C) ensure functional compatibility
• Performance Specification: Both devices meet the 110dB specification requirement
• Regulatory Compliance: Both maintain REACH Unaffected status and EAR99 ECCN classification

The primary difference between the main part and substitute lies in packaging format and product status, not in core electrical performance or functional capability.

Parameter Comparison

Engineering Selection Recommendations

The SA571DR2G serves as a direct functional substitute for the SA571NG based on identical electrical specifications and performance parameters. Selection between these parts depends on application-specific requirements:

SA571NG (Through Hole DIP): Suitable for legacy through-hole PCB designs or applications where existing board layouts cannot be modified. Product obsolescence limits future availability.

SA571DR2G (Surface Mount SOIC): Recommended for new designs, production continuity, and systems requiring modern surface-mount assembly. Active product status ensures ongoing availability and supply chain stability. RoHS3 compliance provides additional environmental regulatory alignment. The increased MSL rating (3 vs. 1) requires standard moisture control during storage and assembly.

Both parts maintain identical regulatory compliance (REACH Unaffected, EAR99) and are suitable for consumer audio and telecommunication system applications within the specified voltage and temperature operating ranges.

Frequently Asked Questions (FAQ)

Q: Can SA571DR2G directly replace SA571NG in existing designs?

A: Electrical and functional compatibility is complete. PCB layout modification is required due to package format change from 16-DIP (Through Hole) to 16-SOIC (Surface Mount). Pin-to-pin electrical functionality remains identical.

Q: What is the impact of the MSL rating difference (1 vs. 3)?

A: MSL 1 indicates unlimited shelf life without moisture control. MSL 3 requires storage below 30°C and 85% relative humidity, with a 168-hour floor life after moisture exposure. Standard moisture control procedures during component storage and assembly are required for SA571DR2G.

Q: Are there supply chain advantages to using SA571DR2G?

A: Yes. SA571DR2G maintains active product status with 20,080 units in stock, compared to SA571NG obsolete status with limited remaining inventory (1,959 units). Active status ensures continued availability for production and future orders.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both parts maintain identical REACH Unaffected status and EAR99 ECCN classification. SA571DR2G adds RoHS3 compliance, providing additional environmental regulatory alignment.

Q: What are the voltage and temperature operating specifications?

A: Both parts operate identically across 6V to 18V supply voltage range and -40°C to 85°C ambient temperature range, with 110dB performance specification maintained in both variants.