ADT7490ARQZ Equivalent & Substitute Parts

Part Overview

The ADT7490ARQZ is a fan control and temperature monitoring integrated circuit manufactured by onsemi, designed for thermal management applications requiring both internal and external temperature sensing with SMBus interface output. The device operates across a -40°C to 125°C temperature range and is housed in a 24-QSOP surface mount package.

The ADT7490ARQZ is classified as obsolete product status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term production requirements for systems currently utilizing this component.

Substiute Parts

ADT7490ARQZ

onsemiIn Stock: 3687ADT7490ARQZ Datasheet

Current PartRFQ

ADT7490ARQZ-REEL

onsemiIn Stock: 16360ADT7490ARQZ-REEL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ADT7490ARQZ is determined by strict alignment of the following critical parameters:

• Functional Equivalence: Fan control and temperature monitoring capability with internal and external sensor support
• Interface Compatibility: SMBus output protocol
• Electrical Specifications: 3V to 3.6V supply voltage range and -40°C to 125°C operating temperature
• Package Compatibility: 24-QSOP surface mount package with identical 24-SSOP (0.154", 3.90mm Width) physical dimensions
• Base Product Series: dBCool® series from onsemi
• Thermal Sensing Range: -40°C to 125°C temperature measurement capability

The ADT7490ARQZ-REEL qualifies as a direct substitute based on these parameters. Both parts share identical electrical specifications, package geometry, and functional topology. The primary distinction is packaging format and product lifecycle status.

Parameter Comparison

*Accuracy difference noted: ADT7490ARQZ-REEL specifies ±2.5°C versus ±1.5°C for ADT7490ARQZ. Both values fall within acceptable thermal monitoring tolerances for fan control applications.

Engineering Selection Recommendations

The ADT7490ARQZ-REEL is the direct functional equivalent for the obsolete ADT7490ARQZ. Selection between these parts should be based on the following criteria:

Product Status: The ADT7490ARQZ-REEL carries Active product status from onsemi, ensuring ongoing manufacturer support, availability, and compliance updates. The ADT7490ARQZ is classified as Obsolete, indicating discontinued production and limited long-term supply assurance.

Compliance and Certifications: Both parts maintain identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS codes (8542.39.0001). Both comply with identical Moisture Sensitivity Level specifications (MSL 3, 168 Hours).

RoHS Compliance: The ADT7490ARQZ-REEL explicitly declares RoHS3 Compliance status. This certification is not specified for the ADT7490ARQZ due to its obsolete classification.

Packaging Considerations: The ADT7490ARQZ-REEL is supplied in Tape & Reel format, optimized for automated assembly processes. The ADT7490ARQZ is supplied in Tube format. Both formats contain electrically identical components; packaging selection depends on production volume and assembly equipment compatibility.

Thermal Accuracy: The ADT7490ARQZ-REEL specifies ±2.5°C accuracy compared to ±1.5°C for the ADT7490ARQZ. This 1°C difference is within acceptable tolerances for fan control applications and does not impact functional compatibility.

For new designs or production continuity, the ADT7490ARQZ-REEL is the recommended selection due to active product status and RoHS3 compliance certification.

Frequently Asked Questions (FAQ)

Q: Can ADT7490ARQZ-REEL be used as a direct replacement for ADT7490ARQZ in existing designs?

A: Yes. Both parts share identical electrical specifications, functional topology, package geometry, and SMBus interface protocol. The components are pin-compatible and functionally equivalent. Packaging format differs (Tape & Reel versus Tube), which affects procurement and assembly processes but not electrical performance.

Q: What is the significance of the accuracy difference between ±1.5°C and ±2.5°C?

A: Both accuracy specifications are within acceptable ranges for fan control and thermal monitoring applications. The 1°C difference does not impact functional compatibility or system performance in typical thermal management scenarios. Selection should be based on specific application requirements for temperature measurement precision.

Q: Why is ADT7490ARQZ classified as Obsolete?

A: Obsolete classification indicates that onsemi has discontinued production of this part number. The ADT7490ARQZ-REEL remains in Active production status, ensuring continued availability and manufacturer support. For applications requiring long-term supply assurance, transition to the Active equivalent is recommended.

Q: Are there any compliance or certification differences between these parts?

A: Both parts maintain identical REACH status, ECCN classification, and HTSUS codes. The ADT7490ARQZ-REEL explicitly declares RoHS3 Compliance. Both parts comply with identical Moisture Sensitivity Level specifications (MSL 3, 168 Hours). The RoHS3 certification on the active part provides additional regulatory assurance for new production.

Q: What packaging format should be selected for high-volume production?

A: Tape & Reel format (ADT7490ARQZ-REEL) is optimized for automated assembly processes and high-volume manufacturing. Tube format (ADT7490ARQZ) is suitable for lower volumes or manual assembly. Both formats contain electrically identical components; selection depends on production volume and assembly equipment capabilities.

Q: Are the 24-QSOP and 24-SSOP package designations equivalent?

A: Yes. Both designations refer to the same physical package: a 24-pin Shrink Small Outline Package with 0.154" (3.90mm) width. The components are mechanically and electrically compatible for PCB assembly and circuit operation.