CAT140049SWI-GT3 Equivalent & Substitute Parts

Part Overview

The CAT140049SWI-GT3 is a Power Management Integrated Circuit (PMIC) supervisor manufactured by onsemi, designed for single-channel power-on reset and voltage monitoring applications. This device features push-pull totem pole output configuration with active-low reset control and a 140ms minimum reset timeout. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support, design updates, and production continuity.

Substiute Parts

CAT140049SWI-GT3

onsemiIn Stock: 1063CAT140049SWI-GT3 Datasheet

Current PartRFQ

TPS3705-33DR

Texas InstrumentsIn Stock: 35361TPS3705-33DR Datasheet

SimilarRFQ

ADM709SARZ-REEL

Analog Devices Inc.In Stock: 708ADM709SARZ-REEL Datasheet

Parametric EquivalentRFQ

MAX706ASESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 7856MAX706ASESA+T Datasheet

Parametric EquivalentRFQ

MAX706SESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 106573MAX706SESA+T Datasheet

Parametric EquivalentRFQ

MAX709SESA+T

Analog Devices Inc./Maxim IntegratedIn Stock: 4172MAX709SESA+T Datasheet

Parametric EquivalentRFQ

STM706SM6F

STMicroelectronicsIn Stock: 20508STM706SM6F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CAT140049SWI-GT3 are qualified based on strict parametric equivalence across the following criteria:

Critical Matching Parameters:

• Single-channel voltage monitoring capability
• Voltage threshold of 2.93V
• Push-pull totem pole output configuration
• Active-low reset logic
• 140ms minimum reset timeout
• 8-SOIC package form factor (0.154", 3.90mm width)
• Surface mount technology
• Operating temperature range of -40°C to 85°C
• Moisture sensitivity level MSL 1 (unlimited)

All identified substitute parts maintain identical electrical specifications and mechanical compatibility with the original CAT140049SWI-GT3. Substitutes differ primarily in manufacturer identity and product status (active vs. obsolete), with some variations in packaging format (cut tape, tape & reel, or digi-reel options).

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: TPS3705-33DR (Texas Instruments)

The TPS3705-33DR is the preferred substitute for the obsolete CAT140049SWI-GT3. This part maintains complete parametric equivalence while offering active product status, ensuring long-term availability and supply chain stability. The device carries ROHS3 compliance certification and is available in high inventory quantities (35,300 units), supporting both immediate and sustained production requirements.

Secondary Recommendations:

MAX706SESA+T (Analog Devices Inc./Maxim Integrated) represents the highest inventory availability option with 106,550 units in stock. This part is suitable for applications requiring extended supply assurance and is ROHS3 compliant.

MAX709SESA+T (Analog Devices Inc./Maxim Integrated) and ADM709SARZ-REEL (Analog Devices Inc.) provide alternative active-status options with ROHS3 compliance. Both maintain identical electrical and mechanical specifications.

STM706SM6F (STMicroelectronics) offers an additional qualified alternative with active product status and ROHS3 compliance, with 20,400 units available.

Compliance Considerations:

All recommended substitute parts carry ROHS3 compliance certification, meeting modern environmental and regulatory requirements. The original CAT140049SWI-GT3 does not specify RoHS status; substitution with ROHS3-compliant alternatives ensures compliance with current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the CAT140049SWI-GT3 be directly replaced with any of these substitute parts?

A: Yes. All listed substitute parts are parametrically equivalent across critical electrical and mechanical specifications: voltage threshold (2.93V), output configuration (push-pull totem pole), reset logic (active low), reset timeout (140ms minimum), package form factor (8-SOIC), and operating temperature range (-40°C to 85°C). Direct pin-for-pin and functional replacement is supported without circuit modification.

Q: What is the primary reason to substitute the CAT140049SWI-GT3?

A: The CAT140049SWI-GT3 is classified as obsolete. Substitution is necessary to ensure continued design support, production continuity, and access to active inventory. All recommended alternatives maintain active product status with established supply chains.

Q: Are there packaging format differences among the substitute parts?

A: Yes. While all parts use the 8-SOIC package form factor, packaging formats differ: TPS3705-33DR and MAX706ASESA+T are available in cut tape (CT) and digi-reel format; MAX706SESA+T and MAX709SESA+T are supplied in tape & reel (TR); ADM709SARZ-REEL is tape & reel; STM706SM6F is cut tape and digi-reel. Select the packaging format that matches your assembly process requirements.

Q: Do all substitute parts meet current compliance standards?

A: All substitute parts carry ROHS3 compliance certification. The original CAT140049SWI-GT3 does not specify RoHS status. Substitution with ROHS3-compliant alternatives ensures alignment with current environmental and regulatory requirements.

Q: Which substitute part offers the best supply availability?

A: MAX706SESA+T provides the highest inventory availability with 106,550 units in stock, followed by STM706SM6F with 20,400 units and TPS3705-33DR with 35,300 units. Selection should balance availability with lead time and supply chain preferences.

Q: Are there any electrical performance differences between the substitute parts?

A: No. All substitute parts maintain identical electrical specifications: 2.93V voltage threshold, push-pull totem pole output, active-low reset logic, 140ms minimum reset timeout, and -40°C to 85°C operating temperature range. Functional performance is equivalent across all qualified alternatives.