CAT140021SWI-GT3 Equivalent & Substitute Parts

Part Overview

The CAT140021SWI-GT3 is a supervisor integrated circuit designed for power management applications. It functions as a simple reset/power-on reset controller with push-pull, totem pole output configuration, monitoring a single voltage threshold at 2.93V. The device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

CAT140021SWI-GT3

onsemiIn Stock: 855CAT140021SWI-GT3 Datasheet

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STM708SM6F

STMicroelectronicsIn Stock: 5352STM708SM6F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAT140021SWI-GT3 is determined by strict equivalence across the following critical parameters:

• Voltage Threshold: 2.93V (single channel monitoring)
• Output Type: Push-Pull, Totem Pole configuration
• Reset Logic: Active High operation
• Reset Timeout: 140ms Minimum
• Package: 8-SOIC form factor with identical physical dimensions
• Operating Temperature: -40°C ~ 85°C range
• Mounting: Surface mount technology

The STM708SM6F meets all substitution criteria, providing functional and pin-compatible replacement capability for the obsolete CAT140021SWI-GT3.

Parameter Comparison

Engineering Selection Recommendations

The STM708SM6F is the direct functional equivalent for the obsolete CAT140021SWI-GT3. Selection of the STM708SM6F is supported by:

• Identical electrical specifications across all monitored parameters
• Pin-compatible 8-SOIC package with matching physical dimensions
• Active product status ensuring continued availability and supply chain stability
• ROHS3 compliance, meeting current environmental and regulatory requirements
• Equivalent moisture sensitivity classification and thermal operating range

The STM708SM6F supports both Active High and Active Low reset logic modes, providing operational flexibility beyond the original CAT140021SWI-GT3 specification while maintaining full backward compatibility with Active High configurations.

Frequently Asked Questions (FAQ)

Q: Can the STM708SM6F directly replace the CAT140021SWI-GT3 without circuit modifications?

A: Yes. The STM708SM6F is pin-compatible and electrically equivalent across all critical parameters: voltage threshold (2.93V), output configuration (push-pull, totem pole), reset timeout (140ms minimum), and operating temperature range (-40°C ~ 85°C). No circuit modifications are required for direct substitution.

Q: What is the primary reason for substituting the CAT140021SWI-GT3?

A: The CAT140021SWI-GT3 is classified as obsolete. The STM708SM6F is an active product with ongoing manufacturing support, ensuring long-term availability and supply chain continuity.

Q: Are there package differences between these parts?

A: No. Both devices use the 8-SOIC package with identical physical dimensions (0.154" width, 3.90mm). PCB footprints and assembly processes remain unchanged.

Q: Does the STM708SM6F support the same reset logic as the CAT140021SWI-GT3?

A: Yes. The CAT140021SWI-GT3 operates with Active High reset logic. The STM708SM6F supports both Active High and Active Low modes, with Active High configuration providing full functional equivalence.

Q: What compliance certifications apply to the STM708SM6F?

A: The STM708SM6F is ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.

Q: Is the moisture sensitivity level the same for both parts?

A: Yes. Both the CAT140021SWI-GT3 and STM708SM6F have MSL 1 (Unlimited) classification, indicating no moisture sensitivity restrictions for storage and handling.