CAT1641WI-42-T3 Equivalent & Substitute Parts

Part Overview

The CAT1641WI-42-T3 is a supervisor integrated circuit with memory function designed for power management applications. This device monitors a single voltage threshold at 4.25V and provides active-high reset output via open drain or open collector configuration. The part is classified as obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Substiute Parts

CAT1641WI-42-T3

onsemiIn Stock: 1049CAT1641WI-42-T3 Datasheet

Current PartRFQ

CAT1641YI-42-T3

onsemiIn Stock: 745CAT1641YI-42-T3 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CAT1641WI-42-T3 is determined by the following critical parameters:

• Base Product Number: Must be CAT1641 to ensure functional equivalence
• Voltage Threshold: Must be 4.25V for circuit compatibility
• Number of Voltages Monitored: Must be 1 channel
• Output Configuration: Must be Open Drain or Open Collector
• Reset Logic: Must be Active High
• Reset Timeout: Must be 130ms Minimum
• Operating Temperature Range: Must support -40°C ~ 85°C
• Mounting Type: Must be Surface Mount
• Compliance: Must maintain ROHS3 Compliant and REACH Unaffected status

The CAT1641YI-42-T3 meets all substitution criteria. The primary difference is the package type: the substitute uses 8-TSSOP (0.173", 4.40mm Width) versus the original 8-SOIC (0.154", 3.90mm Width). Both packages are surface mount with identical pin counts and electrical specifications.

Parameter Comparison

Engineering Selection Recommendations

The CAT1641YI-42-T3 is a direct functional substitute for the obsolete CAT1641WI-42-T3. Both devices maintain identical electrical specifications, compliance certifications, and operational characteristics. The substitute part carries active product status from onsemi, ensuring continued availability and manufacturing support.

The only design consideration is the package footprint change from 8-SOIC to 8-TSSOP. PCB layout modifications are required to accommodate the different package dimensions. Both packages are industry-standard surface mount formats with equivalent pin spacing and electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the CAT1641YI-42-T3 replace the CAT1641WI-42-T3 without circuit modifications?

A: Electrical substitution is direct. The devices are functionally identical with matching voltage thresholds, reset timing, output configurations, and operating ranges. PCB layout changes are necessary due to package geometry differences.

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

A: The package type differs. The original uses 8-SOIC (0.154" width), while the substitute uses 8-TSSOP (0.173" width). Both are surface mount packages with 8 pins and identical electrical performance.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both the CAT1641WI-42-T3 and CAT1641YI-42-T3 are ROHS3 Compliant and REACH Unaffected.

Q: Why is the original part listed as obsolete?

A: The CAT1641WI-42-T3 is classified as obsolete by the manufacturer. The CAT1641YI-42-T3 remains in active production, making it the recommended choice for new designs and ongoing system support.

Q: Do both parts support the same operating temperature range?

A: Yes. Both devices operate across -40°C to 85°C, meeting identical thermal specifications.

Q: What is the reset timeout specification for both parts?

A: Both parts provide a minimum reset timeout of 130ms, ensuring consistent power-on reset behavior in system applications.