ADT7473ARQZ Equivalent & Substitute Parts

Part Overview

The ADT7473ARQZ is a remote thermal controller IC manufactured by onsemi, designed for fan control and temperature monitoring applications. It integrates internal and external temperature sensors with SMBus output capability, operating across the -40°C to 125°C temperature range. The device is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations. The ADT7473ARQZ-REEL variant provides an active product alternative with identical electrical and mechanical specifications.

Substiute Parts

ADT7473ARQZ

onsemiIn Stock: 12244ADT7473ARQZ Datasheet

Current PartRFQ

ADT7473ARQZ-REEL

onsemiIn Stock: 18172ADT7473ARQZ-REEL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ADT7473ARQZ is determined by strict equivalence across the following critical parameters:

• Electrical Specifications: Identical supply voltage range (3V ~ 3.6V), temperature sensing range (-40°C ~ 125°C), and accuracy (±2.5%)
• Functional Topology: Matching ADC, Comparator, Fan Speed Counter, Multiplexer, and Register Bank architecture
• Interface Protocol: SMBus output compatibility
• Physical Package: 16-SSOP form factor with identical pin configuration
• Sensor Configuration: Internal and external temperature sensor capability

The ADT7473ARQZ-REEL is a direct substitute, differing only in packaging format (Tape & Reel versus individual unit packaging) while maintaining complete electrical and mechanical equivalence. Both parts share the same base product number (ADT7473) and dBCool® series designation.

Parameter Comparison

Engineering Selection Recommendations

The ADT7473ARQZ is classified as obsolete. For new designs and ongoing production support, the ADT7473ARQZ-REEL is the recommended substitute. This variant maintains complete electrical and functional equivalence while offering active product status from onsemi, ensuring continued availability and manufacturing support.

The ADT7473ARQZ-REEL is ROHS3 compliant, providing enhanced environmental compliance compared to the obsolete base part. Both parts carry REACH Unaffected status and identical ECCN classification (EAR99), confirming regulatory equivalence for export and supply chain purposes.

Selection between these parts depends solely on packaging requirements: individual unit packaging for the ADT7473ARQZ or Tape & Reel format for the ADT7473ARQZ-REEL. The Tape & Reel variant is preferred for high-volume manufacturing operations due to automated assembly compatibility.

Frequently Asked Questions (FAQ)

Q: Can the ADT7473ARQZ-REEL be used as a direct replacement for the ADT7473ARQZ?

A: Yes. Both parts are electrically and functionally identical. The only difference is packaging format: the ADT7473ARQZ-REEL uses Tape & Reel packaging while the ADT7473ARQZ is supplied as individual units. PCB footprint and pin configuration are identical.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: The ADT7473ARQZ is obsolete and no longer manufactured. The ADT7473ARQZ-REEL maintains active production status, ensuring continued availability for procurement and manufacturing support. For new designs, the active variant is the appropriate selection.

Q: Are there compliance differences between these parts?

A: Both parts are REACH Unaffected and carry EAR99 ECCN classification. The ADT7473ARQZ-REEL is ROHS3 compliant, providing additional environmental compliance certification. Both share identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited).

Q: Which packaging format should be selected for production?

A: Tape & Reel (ADT7473ARQZ-REEL) is standard for automated assembly and high-volume manufacturing. Individual unit packaging (ADT7473ARQZ) is suitable for prototyping, low-volume builds, or manual assembly operations. Electrical performance is identical regardless of packaging selection.

Q: Are the SMBus interface and temperature sensor specifications identical?

A: Yes. Both parts feature identical SMBus output protocol, internal and external temperature sensor configuration, -40°C to 125°C sensing range, and ±2.5% accuracy specification. No firmware or software modifications are required when substituting between these parts.