CAT803LSDI-GT3 Equivalent & Substitute Parts

Part Overview

The CAT803LSDI-GT3 is a single-channel power management supervisor IC manufactured by onsemi, designed for simple reset and power-on reset applications. This device features an open drain or open collector output and operates across the industrial temperature range of -40°C to 85°C. The part is classified as obsolete, making equivalent and substitute components necessary for ongoing system support and new design implementations. The SC-70 (SOT-323) surface mount package ensures compatibility with modern PCB assembly processes.

Substiute Parts

CAT803LSDI-GT3

onsemiIn Stock: 817CAT803LSDI-GT3 Datasheet

Current PartRFQ

MAX6348XR46+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3398MAX6348XR46+T Datasheet

SimilarRFQ

MAX803LEXR+T

Analog Devices Inc./Maxim IntegratedIn Stock: 3709MAX803LEXR+T Datasheet

SimilarRFQ

MAX803LEXR+T10

Analog Devices Inc./Maxim IntegratedIn Stock: 1086MAX803LEXR+T10 Datasheet

SimilarRFQ

UM803LP

Union Semiconductor International LimitedIn Stock: 4015UM803LP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CAT803LSDI-GT3 is determined by strict alignment of the following critical parameters:

• Voltage Threshold: 4.63V (primary functional requirement)
• Output Type: Open Drain or Open Collector (circuit interface requirement)
• Reset Logic: Active Low (system integration requirement)
• Reset Timeout: 140ms Minimum (timing specification)
• Package: SC-70 / SOT-323 (physical and electrical compatibility)
• Mounting Type: Surface Mount (assembly compatibility)
• Number of Voltages Monitored: 1 Channel (functional scope)

Substitute parts are grouped into two categories:

Direct Substitutes (identical or near-identical specifications): MAX803LEXR+T and MAX803LEXR+T10 meet all critical parameters with active product status and extended temperature range support.

Parametric Equivalents (functionally equivalent with minor parameter variations): MAX6348XR46+T provides equivalent functionality with a 4.6V threshold (within acceptable tolerance) and shorter reset timeout (100ms vs. 140ms minimum). UM803LP offers parametric equivalence with identical threshold and timeout specifications.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred)

MAX803LEXR+T and MAX803LEXR+T10 are the primary substitutes for the obsolete CAT803LSDI-GT3. Both parts maintain identical voltage threshold (4.63V) and reset timeout (140ms minimum) specifications. These Analog Devices/Maxim Integrated components carry active product status with ROHS3 compliance and extended operating temperature range (-40°C to 125°C), providing superior long-term availability and environmental compliance compared to the original part.

For Parametric Equivalence

UM803LP from Union Semiconductor International Limited provides parametric equivalence with matching threshold voltage (4.63V) and reset timeout (140ms minimum). This part maintains active product status and RoHS compliance with identical operating temperature range to the original CAT803LSDI-GT3 (-40°C to 85°C).

MAX6348XR46+T from Analog Devices Inc./Maxim Integrated offers functional equivalence with a 4.6V threshold (0.03V variance from specification) and shorter reset timeout (100ms minimum). This part is suitable for applications where the reduced timeout does not impact system requirements. ROHS3 compliance and active product status ensure ongoing availability.

Compliance Considerations

All substitute parts maintain REACH Unaffected status consistent with the original component. MAX803LEXR+T, MAX803LEXR+T10, and MAX6348XR46+T provide ROHS3 compliance, while UM803LP provides RoHS compliance. Selection should align with system-level environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can MAX6348XR46+T replace CAT803LSDI-GT3 directly?

A: MAX6348XR46+T is a parametric equivalent with a 4.6V threshold versus the specified 4.63V. The 0.03V variance and 100ms reset timeout (versus 140ms minimum) require circuit-level evaluation. This part is suitable for applications where the reduced timeout specification does not impact system timing requirements.

Q: What is the difference between MAX803LEXR+T and MAX803LEXR+T10?

A: Both parts share identical electrical specifications (4.63V threshold, 140ms reset timeout, -40°C to 125°C operating range) and SC-70 packaging. The suffix difference reflects manufacturing or packaging variants. Both are active products suitable for direct replacement.

Q: Is UM803LP a suitable substitute?

A: UM803LP meets all critical parameters: 4.63V threshold, 140ms reset timeout, active low reset, open drain output, and SC-70 packaging. Operating temperature range matches the original (-40°C to 85°C). This part is suitable for direct replacement with active product status and RoHS compliance.

Q: Why is the CAT803LSDI-GT3 obsolete?

A: The original part is classified as obsolete by onsemi. Active substitute parts from Analog Devices/Maxim Integrated and Union Semiconductor International Limited provide equivalent or superior specifications with ongoing manufacturing support and compliance certifications.

Q: Are all substitute parts available in SC-70 packaging?

A: All substitute parts listed are available in SC-70 (SOT-323) surface mount packaging, ensuring direct PCB compatibility with the original CAT803LSDI-GT3 design.

Q: What compliance certifications apply to these substitutes?

A: All substitute parts maintain REACH Unaffected status. MAX803LEXR+T, MAX803LEXR+T10, and MAX6348XR46+T provide ROHS3 compliance. UM803LP provides RoHS compliance. Selection should align with system-level regulatory requirements.