CAT809TSDI-T3 Equivalent & Substitute Parts

Part Overview

The CAT809TSDI-T3 is a Power Management Integrated Circuit (PMIC) functioning as a microprocessor supervisor with push-pull output configuration. This device monitors a single voltage threshold at 3.08V and provides active-low reset signaling with a 140ms minimum timeout. The CAT809TSDI-T3 is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

CAT809TSDI-T3

onsemiIn Stock: 828CAT809TSDI-T3 Datasheet

Current PartRFQ

MIC809TYC3-TR

Microchip TechnologyIn Stock: 816MIC809TYC3-TR Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAT809TSDI-T3 is determined by strict equivalence across the following critical parameters:

• Voltage Threshold: 3.08V (exact match required)
• Output Configuration: Push-Pull, Totem Pole topology
• Reset Logic: Active Low signaling
• Reset Timeout: 140ms Minimum
• Number of Monitored Voltages: Single channel
• Package: SC-70 / SOT-323 form factor
• Mounting Type: Surface Mount
• Operating Temperature Range: -40°C to 85°C minimum

The MIC809TYC3-TR from Microchip Technology meets all specified electrical and mechanical parameters, establishing it as a direct functional equivalent. This substitute maintains identical threshold voltage, output topology, reset characteristics, and thermal operating range while offering active product status and improved supply chain availability.

Parameter Comparison

Engineering Selection Recommendations

The MIC809TYC3-TR is the qualified substitute for the obsolete CAT809TSDI-T3 based on the following factors:

Electrical Equivalence: Both devices operate identically across all monitored parameters—voltage threshold, output topology, reset timing, and temperature range. No circuit modifications are required for direct substitution.

Product Status: The MIC809TYC3-TR maintains active product status with confirmed inventory availability (797 pcs), ensuring long-term supply chain reliability compared to the obsolete CAT809TSDI-T3.

Regulatory Compliance: The MIC809TYC3-TR carries ROHS3 compliance certification, meeting modern environmental and material restriction standards. Both parts maintain REACH Unaffected status and identical ECCN/HTSUS classifications, confirming regulatory alignment.

Packaging and Handling: Identical MSL rating (1 - Unlimited) and SC-70 package specifications ensure compatibility with existing PCB layouts and assembly processes without design revision.

Frequently Asked Questions (FAQ)

Q: Can the MIC809TYC3-TR replace the CAT809TSDI-T3 without circuit modifications?

A: Yes. The MIC809TYC3-TR is electrically and mechanically equivalent across all specified parameters. Direct substitution is possible without schematic or layout changes.

Q: What is the primary reason for substituting the CAT809TSDI-T3?

A: The CAT809TSDI-T3 is classified as obsolete. The MIC809TYC3-TR provides an active, in-stock alternative with identical electrical performance and improved long-term availability.

Q: Are there differences in packaging between these parts?

A: No. Both devices use the SC-70 / SOT-323 surface-mount package with identical pin configurations and MSL ratings.

Q: Does the MIC809TYC3-TR meet current environmental standards?

A: Yes. The MIC809TYC3-TR is ROHS3 compliant and REACH Unaffected, meeting current regulatory requirements. The obsolete CAT809TSDI-T3 does not specify RoHS compliance.

Q: What is the voltage threshold for both parts?

A: Both the CAT809TSDI-T3 and MIC809TYC3-TR monitor a 3.08V threshold with active-low reset output and 140ms minimum timeout.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. Identical electrical specifications, package form factor, and thermal operating range (-40°C to 85°C) permit direct pin-for-pin substitution in PCB assemblies.