CAT803TSDI-T3 Equivalent & Substitute Parts

Part Overview

The CAT803TSDI-T3 is a single-channel power management supervisor IC manufactured by onsemi, designed for power-on reset and simple reset applications. This device features an open drain or open collector output with active low reset functionality and a 140ms minimum reset timeout. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain functional equivalence across voltage monitoring, reset behavior, and output characteristics while accommodating modern active product availability.

Substiute Parts

CAT803TSDI-T3

onsemiIn Stock: 17221CAT803TSDI-T3 Datasheet

Current PartRFQ

ADM803TAKSZ-REEL7

Analog Devices Inc.In Stock: 2290ADM803TAKSZ-REEL7 Datasheet

SimilarRFQ

MAX6328XR31+T

Analog Devices Inc./Maxim IntegratedIn Stock: 15461MAX6328XR31+T Datasheet

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MAX6377XR31+T

Analog Devices Inc./Maxim IntegratedIn Stock: 902MAX6377XR31+T Datasheet

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MAX803TEXR+T

Analog Devices Inc./Maxim IntegratedIn Stock: 22917MAX803TEXR+T Datasheet

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UM803TP

Union Semiconductor International LimitedIn Stock: 3763UM803TP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CAT803TSDI-T3 is determined by strict parameter matching across the following critical criteria:

Mandatory Matching Parameters:

• Voltage Threshold: 3.08V
• Output Type: Open Drain or Open Collector
• Reset Logic: Active Low
• Number of Voltages Monitored: 1
• Package / Case: SC-70, SOT-323
• Mounting Type: Surface Mount
• Reset Timeout: 140ms Minimum (or equivalent)

Allowable Variations:

• Operating Temperature Range: Extended ranges (-40°C ~ 125°C) are acceptable as they encompass the original specification
• Product Status: Active products are preferred over obsolete parts
• Packaging Format: Cut Tape (CT), Digi-Reel®, and Tape & Reel (TR) are functionally equivalent
• Compliance Certifications: RoHS3 compliance and REACH unaffected status are acceptable enhancements

All identified substitute parts meet these criteria and maintain functional equivalence with the CAT803TSDI-T3 across voltage monitoring, reset behavior, and output characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

MAX803TEXR+T and ADM803TAKSZ-REEL7 are the preferred substitutes. Both maintain exact parameter matching with the CAT803TSDI-T3, including 140ms minimum reset timeout and 3.08V threshold voltage. MAX803TEXR+T offers extended operating temperature range (-40°C ~ 125°C) and is available in higher inventory (22,894 pcs). ADM803TAKSZ-REEL7 provides equivalent performance with extended temperature capability (-40°C ~ 125°C) and active product status. Both are ROHS3 compliant.

Secondary Substitutes (Functional Equivalence with Minor Variations):

MAX6328XR31+T maintains all critical parameters with the exception of reset timeout specification (100ms minimum versus 140ms minimum). This part is suitable for applications where the shorter timeout does not present a functional constraint. Operating temperature range matches the original specification (-40°C ~ 85°C).

UM803TP from Union Semiconductor International Limited provides functional equivalence across all critical parameters, including 140ms minimum reset timeout and 3.08V threshold. This part is available in active status with 3,730 pcs in inventory and RoHS compliance.

Tertiary Substitute (Limited Compatibility):

MAX6377XR31+T is classified as a voltage detector rather than a simple reset/power-on reset device. Reset timeout is not specified in the provided data. This part should be evaluated only when voltage detection functionality is the primary requirement and reset timeout specification is not critical to the application.

All substitute parts are REACH unaffected and carry EAR99 ECCN classification, matching the regulatory profile of the original part.

Frequently Asked Questions (FAQ)

Q: Can MAX6328XR31+T be used as a direct replacement for CAT803TSDI-T3?

A: MAX6328XR31+T is functionally compatible with the CAT803TSDI-T3 across voltage threshold (3.08V), output type (open drain/open collector), reset logic (active low), and package (SC-70, SOT-323). The primary difference is reset timeout specification: MAX6328XR31+T specifies 100ms minimum versus 140ms minimum for the CAT803TSDI-T3. Substitution is valid if the application does not require the extended 140ms timeout.

Q: What is the difference between Cut Tape (CT) & Digi-Reel® and Tape & Reel (TR) packaging?

A: Both packaging formats are functionally equivalent and contain identical die and electrical characteristics. Cut Tape & Digi-Reel® is suitable for lower-volume applications and manual assembly, while Tape & Reel is optimized for high-volume automated pick-and-place assembly. Selection depends on production volume and assembly equipment capability, not electrical performance.

Q: Why is MAX6377XR31+T listed as a substitute if it is a voltage detector rather than a reset supervisor?

A: MAX6377XR31+T maintains all critical electrical parameters (3.08V threshold, open drain output, active low reset, SC-70 package) and is functionally compatible for applications where voltage detection is the primary function. However, the absence of specified reset timeout and different device classification indicate this part should be evaluated for specific application requirements before selection.

Q: Are all substitute parts RoHS compliant?

A: All identified substitute parts carry RoHS3 compliance certification. The original CAT803TSDI-T3 RoHS status is not specified in the provided data. All substitutes meet modern environmental and regulatory compliance standards.

Q: What is the inventory availability for each substitute part?

A: MAX803TEXR+T has the highest inventory at 22,894 pcs. MAX6328XR31+T is available with 15,400 pcs. ADM803TAKSZ-REEL7 has 2,275 pcs. UM803TP is available with 3,730 pcs. MAX6377XR31+T has the lowest inventory at 801 pcs. Inventory levels should be verified with the supplier for current availability.

Q: Can substitute parts with extended operating temperature ranges (-40°C ~ 125°C) be used in applications specified for -40°C ~ 85°C?

A: Yes. Extended operating temperature ranges are backward compatible and encompass the original specification. Parts rated for -40°C ~ 125°C can be used in applications requiring -40°C ~ 85°C operation without functional degradation.

Q: What is the significance of MSL (Moisture Sensitivity Level) 1?

A: MSL 1 indicates unlimited shelf life and no special moisture control requirements during storage, handling, or assembly. All identified substitute parts carry MSL 1 classification, ensuring compatibility with standard manufacturing and storage practices.