CAT140029SWI-GT3 Equivalent & Substitute Parts

Part Overview

The CAT140029SWI-GT3 is a Power Management IC (PMIC) supervisor with push-pull output configuration, manufactured by onsemi. This device functions as a simple reset/power-on reset controller monitoring a single voltage threshold at 2.93V with a 140ms minimum reset timeout. The part is classified as obsolete, making identification of active equivalent alternatives essential for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	CAT140029SWI-GT3
Manufacturer	onsemi
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	2.93V
Output Configuration	Push-Pull, Totem Pole
Reset Logic	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CAT140029SWI-GT3 is determined by strict equivalence across the following critical parameters:

Single voltage monitoring channel
2.93V threshold voltage
Push-pull, totem pole output configuration
Active low reset logic
140ms minimum reset timeout
Operating temperature range -40°C to 85°C
8-SOIC surface mount package with 0.154" width (3.90mm)

All identified substitute parts match these specifications exactly. Substitutes differ only in manufacturer identity, product status (active vs. obsolete), packaging format (tape & reel vs. cut tape), and compliance certifications. These differences do not affect functional equivalence in applications requiring the specified electrical and mechanical parameters.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Logic	Reset Timeout	Temp Range	Package	Product Status	RoHS Status
CAT140029SWI-GT3	onsemi	2.93V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	8-SOIC	Obsolete	Not Specified
ADM709SARZ-REEL	Analog Devices Inc.	2.93V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
MAX706ASESA+T	Analog Devices Inc./Maxim Integrated	2.93V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
MAX706SESA+T	Analog Devices Inc./Maxim Integrated	2.93V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
MAX709SESA+T	Analog Devices Inc./Maxim Integrated	2.93V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
STM706SM6F	STMicroelectronics	2.93V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant
TPS3705-33DR	Texas Instruments	2.93V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	8-SOIC	Active	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed above provide functional equivalence to the CAT140029SWI-GT3 based on matching electrical specifications and mechanical packaging. Selection among substitutes should prioritize the following factors:

Product Status: All substitute parts carry active product status, ensuring ongoing availability and manufacturer support. The original CAT140029SWI-GT3 is obsolete and should not be selected for new designs.

Compliance & Certifications: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The original part does not specify RoHS status.

Packaging Format: Substitutes are available in tape & reel (ADM709SARZ-REEL, MAX709SESA+T) and cut tape with Digi-Reel options (MAX706ASESA+T, MAX706SESA+T, STM706SM6F, TPS3705-33DR). Packaging selection depends on production volume and assembly requirements.

Inventory Availability: Substitute parts demonstrate varying stock levels. MAX706SESA+T offers the highest inventory (106,550 units), while TPS3705-33DR (35,300 units) and STM706SM6F (20,400 units) provide substantial availability.

Manufacturer Ecosystem: Selection may be influenced by existing design relationships with Analog Devices Inc./Maxim Integrated, STMicroelectronics, or Texas Instruments.

Frequently Asked Questions (FAQ)

Q: Can any of these substitute parts directly replace the CAT140029SWI-GT3 without circuit modification?

A: Yes. All listed substitute parts match the CAT140029SWI-GT3 across all critical electrical parameters (voltage threshold, output configuration, reset logic, timeout duration, and operating temperature range) and share identical 8-SOIC packaging. Direct pin-for-pin substitution is supported.

Q: Why is the original CAT140029SWI-GT3 marked as obsolete?

A: The part is classified as obsolete by the manufacturer. Substitute parts with active product status should be used for new designs and ongoing production to ensure long-term availability and manufacturer support.

Q: What is the difference between tape & reel and cut tape packaging?

A: Tape & reel packaging is supplied on continuous carrier tape wound on reels, suitable for high-volume automated assembly. Cut tape packaging provides individual segments of carrier tape, typically used for lower volumes or mixed-component orders. Both formats contain identical components; packaging selection depends on production volume and assembly equipment compatibility.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant. The original CAT140029SWI-GT3 does not specify RoHS status. ROHS3 compliance ensures the parts meet current environmental and regulatory standards for electronic components.

Q: Can I mix substitute parts from different manufacturers in the same production run?

A: Yes. All substitute parts are functionally equivalent and share identical electrical specifications and packaging. Mixing manufacturers is permissible from a technical standpoint; however, design documentation and supply chain management should reflect the specific part numbers used.

Q: What is the significance of the 2.93V threshold voltage?

A: The 2.93V threshold is the voltage level at which the supervisor monitors the power supply. When the supply voltage falls below this threshold, the device initiates a reset signal. All substitute parts maintain this identical threshold, ensuring equivalent system behavior.

Q: Are there any temperature or environmental limitations I should consider?

A: All parts, including substitutes, operate across the -40°C to 85°C temperature range. Moisture sensitivity level is 1 (unlimited) for all parts, indicating no special moisture handling requirements during storage or assembly.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message