MIC812SU TR Equivalent & Substitute Parts

Part Overview

The MIC812SU TR is a single-channel power management supervisor IC manufactured by Microchip Technology, designed for power-on reset and simple reset applications. This component operates as a push-pull, totem pole output supervisor with a 2.93V voltage threshold and 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 maintain functional equivalence through matching electrical parameters and mechanical compatibility within the SOT-143 package family.

Key Parameters

Parameter	Value
Part Number	MIC812SU TR
Manufacturer	Microchip Technology
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 to 85°C (TA)
Mounting Type	Surface Mount
Package / Case	TO-253-4, TO-253AA
Supplier Device Package	SOT-143
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
REACH Status	REACH Unaffected
ECCN	EAR99
HTSUS Code	8542.39.0001

Substitute Part Grouping Explanation

Substitute parts for the MIC812SU TR are classified based on strict electrical and mechanical parameter matching. The primary substitution criteria are:

Critical Parameters for Substitution:

Voltage Threshold: 2.93V (exact match required)
Output Configuration: Push-Pull, Totem Pole
Reset Logic: Active High
Reset Timeout: 140ms Minimum
Operating Temperature Range: -40°C to 85°C
Package / Case: TO-253-4, TO-253AA
Supplier Device Package: SOT-143 or SOT-143-4

Substitution Categories:

Direct Manufacturer Substitute: MIC812SUY-TR (Microchip Technology) — Same base product with active product status and ROHS3 compliance.

Manufacturer Recommended Equivalent: APX812-31UG-7 (Diodes Incorporated) — Meets all electrical parameters with voltage threshold of 3.08V, representing a minor threshold variation within acceptable operating margins for supervisor applications.

Parametric Equivalents: ADM812SARTZ-REEL, ADM812SARTZ-REEL7 (Analog Devices Inc.), APX812-29UG-7 (Diodes Incorporated), MAX812SEUS+T (Analog Devices Inc./Maxim Integrated), and STM812SW16F (STMicroelectronics) — All maintain the 2.93V voltage threshold with identical electrical and mechanical specifications.

Parameter Comparison

Parameter	MIC812SU TR	MIC812SUY-TR	APX812-31UG-7	ADM812SARTZ-REEL	ADM812SARTZ-REEL7	APX812-29UG-7	MAX812SEUS+T	STM812SW16F
Manufacturer	Microchip	Microchip	Diodes Inc.	Analog Devices	Analog Devices	Diodes Inc.	Analog Devices/Maxim	STMicroelectronics
Voltage Threshold	2.93V	2.93V	3.08V	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	Push-Pull, Totem Pole
Reset Logic	Active High	Active High	Active High	Active High	Active High	Active High	Active High	Active High
Reset Timeout	140ms Min	140ms Min	140ms Min	140ms Min	140ms Min	140ms Min	140ms Min	140ms Min
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 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	TO-253-4, TO-253AA
Supplier Device Package	SOT-143	SOT-143	SOT-143	SOT-143-4	SOT-143-4	SOT-143	SOT-143-4	SOT-143-4
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
ECCN	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99	EAR99
HTSUS Code	8542.39.0001	8542.39.0001	8542.39.0001	8542.39.0001	8542.39.0001	8542.39.0001	8542.39.0001	8542.39.0001

Engineering Selection Recommendations

For New Designs and Production Transition:

MIC812SUY-TR is the primary recommended substitute, offering direct compatibility as the active product variant from the original manufacturer Microchip Technology. This part maintains identical electrical specifications and mechanical packaging while providing ROHS3 compliance and active product status.

For Applications Requiring Maximum Inventory Availability:

APX812-29UG-7 (Diodes Incorporated) offers the highest inventory level at 36,200 pieces, with exact parameter matching to the MIC812SU TR including the 2.93V voltage threshold. This part is ROHS3 compliant and actively supported.

For Manufacturer-Recommended Alternatives:

APX812-31UG-7 (Diodes Incorporated) represents the manufacturer-recommended equivalent with a voltage threshold of 3.08V. While this represents a minor threshold variation, it maintains all other electrical and mechanical specifications. This part is suitable for applications where the slightly higher threshold does not impact system requirements.

For Multi-Source Flexibility:

ADM812SARTZ-REEL (Analog Devices Inc.) and STM812SW16F (STMicroelectronics) provide additional sourcing options with exact parameter matching. Both parts are ROHS3 compliant and actively produced, offering supply chain redundancy.

All substitute parts maintain ROHS3 compliance, addressing the non-compliance status of the obsolete MIC812SU TR. Selection should prioritize product status (active vs. obsolete), inventory availability, and compliance requirements for the target application.

Frequently Asked Questions (FAQ)

Q: Can MIC812SUY-TR be used as a direct replacement for MIC812SU TR?

A: Yes. MIC812SUY-TR is the active product variant from Microchip Technology with identical electrical specifications, output configuration, reset logic, and package compatibility. The primary difference is product status (active vs. obsolete) and ROHS3 compliance.

Q: What is the significance of the voltage threshold difference in APX812-31UG-7?

A: APX812-31UG-7 has a voltage threshold of 3.08V compared to the MIC812SU TR's 2.93V. This 0.15V difference represents a minor variation within the supervisor IC category. Compatibility depends on the specific application's voltage monitoring requirements. For applications requiring exact 2.93V threshold matching, select parts with identical threshold specifications.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. The original MIC812SU TR is RoHS non-compliant due to its obsolete status. Substitution with any listed part addresses RoHS compliance requirements for new designs and production.

Q: Do package variations between SOT-143 and SOT-143-4 affect compatibility?

A: SOT-143 and SOT-143-4 are mechanically compatible within the TO-253-4 and TO-253AA package families. Both variants fit the same PCB footprint and mounting requirements. Package designation differences reflect manufacturer nomenclature variations rather than functional incompatibility.

Q: Which substitute part offers the best inventory availability?

A: APX812-29UG-7 (Diodes Incorporated) provides the highest inventory level at 36,200 pieces, with exact parameter matching to the MIC812SU TR. This part is suitable for high-volume production requirements.

Q: Can I use multiple substitute parts interchangeably in the same design?

A: Yes, all listed substitute parts maintain identical electrical specifications for voltage threshold (2.93V variants), output configuration, reset logic, and operating temperature range. Parts with matching voltage thresholds are functionally interchangeable. APX812-31UG-7 with its 3.08V threshold requires application-specific validation before use.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts share ROHS3 compliance, REACH Unaffected status, ECCN EAR99 classification, and HTSUS code 8542.39.0001. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all parts, indicating no moisture sensitivity constraints during storage and handling.

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