CAT812STBI-T3 Equivalent & Substitute Parts

Part Overview

The CAT812STBI-T3 is a microprocessor supervisory circuit manufactured by onsemi, designed to monitor power supply voltage and provide reset control for digital systems. This device operates as a simple reset/power-on reset supervisor with push-pull, totem pole output configuration in a SOT-143-4 surface mount package.

The CAT812STBI-T3 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for applications currently using this component.

Key Parameters

Parameter	Value
Manufacturer Part Number	CAT812STBI-T3
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 High
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	TO-253-4, TO-253AA
Supplier Device Package	SOT-143-4
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the CAT812STBI-T3 is determined by strict equivalence across the following critical parameters:

Voltage Threshold: 2.93V (exact match required)
Output Configuration: Push-Pull, Totem Pole (exact match required)
Reset Logic: Active High (exact match required)
Reset Timeout: 140ms Minimum (exact match required)
Number of Voltages Monitored: 1 (exact match required)
Operating Temperature Range: -40°C ~ 85°C (exact match required)
Package / Case: TO-253-4, TO-253AA (exact match required)
Mounting Type: Surface Mount (exact match required)

All identified substitute parts meet these electrical and mechanical requirements. Packaging format (Tape & Reel or Cut Tape) does not affect functional equivalence but may impact procurement and handling procedures.

Parameter Comparison

Parameter	CAT812STBI-T3	APX812-29UG-7	STM812SW16F	ADM812SARTZ-REEL	ADM812SARTZ-REEL7	MAX812SEUS+T	MIC812SUY-TR
Manufacturer	onsemi	Diodes Incorporated	STMicroelectronics	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc./Maxim Integrated	Microchip Technology
Voltage - Threshold	2.93V	2.93V	2.93V	2.93V	2.93V	2.93V	2.93V
Output Configuration	Push-Pull, Totem Pole	Push-Pull, Totem Pole	Push-Pull, Totem Pole	Push-Pull, Totem Pole	Push-Pull, Totem Pole	Push-Pull, Totem Pole	Push-Pull, Totem Pole
Reset Logic	Active High	Active High	Active High	Active High	Active High	Active High	Active High
Reset Timeout	140ms Minimum	140ms Minimum	140ms Minimum	140ms Minimum	140ms Minimum	140ms Minimum	140ms Minimum
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	TO-253-4, TO-253AA	TO-253-4, TO-253AA	TO-253-4, TO-253AA	TO-253-4, TO-253AA	TO-253-4, TO-253AA	TO-253-4, TO-253AA	TO-253-4, TO-253AA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	REACH Unaffected	REACH Unaffected	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All substitute parts listed are parametrically equivalent to the CAT812STBI-T3 and meet identical electrical and mechanical specifications. Selection among these alternatives should be based on the following factors:

Product Status: All substitute parts carry Active product status, ensuring ongoing manufacturer support and long-term availability compared to the obsolete CAT812STBI-T3.

Compliance and Certifications: STM812SW16F, ADM812SARTZ-REEL, ADM812SARTZ-REEL7, MAX812SEUS+T, and MIC812SUY-TR are ROHS3 compliant. APX812-29UG-7 maintains REACH Unaffected status. All parts share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Inventory Availability: Current stock levels vary across manufacturers. APX812-29UG-7 (Diodes Incorporated) offers the highest inventory at 36,200 pieces. STM812SW16F (STMicroelectronics) provides 9,400 pieces. ADM812SARTZ-REEL (Analog Devices Inc.) offers 6,876 pieces. MIC812SUY-TR (Microchip Technology) provides 3,708 pieces. ADM812SARTZ-REEL7 (Analog Devices Inc.) offers 2,794 pieces. MAX812SEUS+T (Analog Devices Inc./Maxim Integrated) provides 1,320 pieces.

Packaging Format: Tape & Reel (TR) packaging is available for APX812-29UG-7, ADM812SARTZ-REEL, MAX812SEUS+T, and MIC812SUY-TR. Cut Tape (CT) & Digi-Reel® packaging is available for STM812SW16F and ADM812SARTZ-REEL7. Packaging selection depends on production volume and assembly line requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace CAT812STBI-T3 with any of these substitute parts?

A: Yes. All listed substitute parts are parametrically equivalent across voltage threshold (2.93V), output configuration (push-pull, totem pole), reset logic (active high), reset timeout (140ms minimum), operating temperature range (-40°C ~ 85°C), and package specifications (TO-253-4, TO-253AA, SOT-143-4). Direct pin-for-pin replacement is supported.

Q: What is the difference between the various Analog Devices ADM812 variants?

A: ADM812SARTZ-REEL and ADM812SARTZ-REEL7 are both manufactured by Analog Devices Inc. and share identical electrical specifications. The primary difference is packaging format: ADM812SARTZ-REEL is supplied in Tape & Reel (TR) format, while ADM812SARTZ-REEL7 is supplied in Cut Tape (CT) & Digi-Reel® format. Both are ROHS3 compliant and active products.

Q: Why is the CAT812STBI-T3 listed as obsolete?

A: The CAT812STBI-T3 has been discontinued by onsemi. Substitute parts from active manufacturers ensure continued access to equivalent supervisory circuit functionality and manufacturer technical support.

Q: Are all substitute parts ROHS3 compliant?

A: Five of the seven substitute parts are ROHS3 compliant: STM812SW16F, ADM812SARTZ-REEL, ADM812SARTZ-REEL7, MAX812SEUS+T, and MIC812SUY-TR. APX812-29UG-7 maintains REACH Unaffected status. All parts share identical environmental compliance classifications (ECCN: EAR99, HTSUS: 8542.39.0001).

Q: Does packaging format affect electrical performance?

A: No. Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging formats do not affect electrical performance or functional equivalence. Packaging selection is determined by procurement procedures and assembly line automation requirements.

Q: Which substitute part offers the best inventory availability?

A: APX812-29UG-7 from Diodes Incorporated currently offers the highest inventory level at 36,200 pieces in stock.

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