CAT809HTBI-GT3 Equivalent & Substitute Parts

Part Overview

The CAT809HTBI-GT3 is a single-channel power management supervisor IC manufactured by onsemi, designed for reset and power-on reset applications. This device features push-pull, totem pole output configuration with active low reset functionality and a 4.55V voltage threshold. The part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning.

Substiute Parts

CAT809HTBI-GT3

onsemiIn Stock: 2027CAT809HTBI-GT3 Datasheet

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TPS3809I50DBVR

Texas InstrumentsIn Stock: 35506TPS3809I50DBVR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CAT809HTBI-GT3 is determined by strict equivalence across the following critical parameters:

• Package / Case: Both main and substitute parts must use TO-236-3, SC-59, SOT-23-3 packaging to ensure mechanical and electrical compatibility
• Type: Single-channel simple reset/power-on reset functionality
• Number of Voltages Monitored: 1 channel
• Voltage - Threshold: 4.55V threshold requirement
• Output Configuration: Push-pull, totem pole output stage
• Reset Logic: Active low reset signal
• Operating Temperature Range: -40°C ~ 85°C (TA)
• Mounting Type: Surface mount

The TPS3809I50DBVR from Texas Instruments meets all these critical parameters, establishing it as a direct functional equivalent for the obsolete CAT809HTBI-GT3.

Parameter Comparison

Engineering Selection Recommendations

The TPS3809I50DBVR is the appropriate substitute for the obsolete CAT809HTBI-GT3 based on the following factors:

• Product Status Alignment: The TPS3809I50DBVR maintains active product status with Texas Instruments, ensuring long-term availability and supply chain continuity
• Regulatory Compliance: Both parts share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (8542.39.0001), eliminating compliance barriers to substitution
• Functional Equivalence: All critical electrical and mechanical parameters are identical, including voltage threshold, output configuration, reset logic, and operating temperature range
• Reset Timeout Consideration: The TPS3809I50DBVR specifies a 120ms minimum reset timeout compared to the CAT809HTBI-GT3's 140ms minimum. This represents a tighter specification that remains compatible with designs accommodating the original 140ms requirement

Frequently Asked Questions (FAQ)

Q: Can the TPS3809I50DBVR be used as a direct replacement for the CAT809HTBI-GT3?

A: Yes. Both parts share identical package, voltage threshold, output configuration, reset logic, and operating temperature specifications. The TPS3809I50DBVR is functionally equivalent and pin-compatible.

Q: What is the significance of the different reset timeout specifications?

A: The CAT809HTBI-GT3 specifies 140ms minimum reset timeout, while the TPS3809I50DBVR specifies 120ms minimum. The TPS3809I50DBVR's tighter specification is compatible with designs that accommodate the original 140ms requirement, as it will always meet or exceed the timing window.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts share identical REACH status, ECCN classification, and HTSUS codes. Substitution introduces no regulatory or compliance barriers.

Q: Why is the CAT809HTBI-GT3 classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured by onsemi. The TPS3809I50DBVR from Texas Instruments provides functional continuity for designs requiring single-channel power-on reset supervision with 4.55V threshold in SOT-23-3 packaging.

Q: Are the packaging dimensions identical between these parts?

A: Yes. Both parts use TO-236-3, SC-59, SOT-23-3 packaging, ensuring mechanical compatibility in PCB layouts and assembly processes.