TCM811MERCTR Equivalent & Substitute Parts

Part Overview

The TCM811MERCTR is a single-channel power management supervisor IC manufactured by Microchip Technology, designed for power-on reset and supervisory functions in embedded systems. This device features push-pull totem pole output architecture with active-low reset signaling and a 140ms minimum reset timeout. The TCM811MERCTR is classified as obsolete, making identification of functionally equivalent active alternatives essential for new designs and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	TCM811MERCTR
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	4.38V
Output Configuration	Push-Pull, Totem Pole
Reset Logic	Active Low
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
RoHS Status	ROHS3 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 TCM811MERCTR are qualified based on strict electrical and mechanical parameter equivalence. The following criteria determine substitutability:

Critical Matching Parameters:

Single-channel voltage monitoring architecture
4.38V voltage threshold
Push-pull totem pole output configuration
Active-low reset logic
140ms minimum reset timeout
-40°C to 85°C operating temperature range
Surface mount technology with TO-253-4 / TO-253AA package footprint
SOT-143 or SOT-143-4 supplier device package compatibility
ROHS3 compliance and REACH unaffected status

All identified substitute parts maintain these electrical and mechanical specifications, ensuring functional interchangeability in applications designed for the TCM811MERCTR. Substitute parts are sourced from qualified manufacturers including Microchip Technology, Analog Devices Inc., Diodes Incorporated, and STMicroelectronics.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Logic	Reset Timeout	Operating Temp	Package	Product Status	Inventory (Pcs)
TCM811MERCTR	Microchip Technology	4.38V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143	Obsolete	7950
MIC811MUY-TR	Microchip Technology	4.38V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143	Active	2590
ADM811MARTZ-REEL	Analog Devices Inc.	4.38V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143-4	Active	700
ADM811MARTZ-REEL7	Analog Devices Inc.	4.38V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143-4	Active	22115
APX811-44UG-7	Diodes Incorporated	4.38V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143	Active	26782
MAX811MEUS+T	Analog Devices Inc./Maxim Integrated	4.38V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143-4	Active	16772
STM811MW16F	STMicroelectronics	4.38V	Push-Pull, Totem Pole	Active Low	140ms Min	-40°C ~ 85°C	SOT-143-4	Active	3100

Engineering Selection Recommendations

All identified substitute parts maintain active product status with established manufacturing support, ensuring long-term availability and supply chain reliability. Selection among equivalent parts should prioritize the following factors:

Product Status Consideration: The TCM811MERCTR is obsolete. All substitute parts listed are active products with ongoing manufacturer support and production continuity.

Compliance and Certifications: All substitute parts maintain ROHS3 compliance and REACH unaffected status, matching the regulatory posture of the original TCM811MERCTR. ECCN classification remains EAR99 across all alternatives.

Packaging and Inventory: Substitute parts are available in both SOT-143 and SOT-143-4 package variants, all compatible with TO-253-4 and TO-253AA footprints. Inventory levels vary; APX811-44UG-7 and ADM811MARTZ-REEL7 offer the highest stock availability.

Manufacturer Diversity: Substitute parts are sourced from Microchip Technology, Analog Devices Inc., Diodes Incorporated, and STMicroelectronics, providing multiple qualified supply channels.

Frequently Asked Questions (FAQ)

Q: Can I directly replace TCM811MERCTR with any of the listed substitute parts?

A: Yes. All listed substitute parts maintain identical electrical specifications including 4.38V threshold, push-pull totem pole output, active-low reset logic, and 140ms reset timeout. Package footprints are compatible across TO-253-4 and TO-253AA designations.

Q: What is the difference between SOT-143 and SOT-143-4 packages?

A: Both package variants are compatible with the same TO-253-4 and TO-253AA footprints specified for the TCM811MERCTR. The designation difference reflects manufacturer nomenclature; electrical and mechanical compatibility is maintained.

Q: Why is the TCM811MERCTR listed as obsolete?

A: The TCM811MERCTR has reached end-of-life status with the manufacturer. Active equivalent parts from multiple manufacturers provide continued functionality and supply availability for new designs and production requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and REACH unaffected status, matching the environmental and regulatory requirements of the original TCM811MERCTR.

Q: Which substitute part offers the best inventory availability?

A: APX811-44UG-7 from Diodes Incorporated offers 26,782 pieces in stock, followed by ADM811MARTZ-REEL7 from Analog Devices Inc. with 22,115 pieces. Both provide substantial supply for production requirements.

Q: Do substitute parts support the same operating temperature range?

A: Yes. All substitute parts operate across the -40°C to 85°C temperature range specified for the TCM811MERCTR, ensuring compatibility in equivalent thermal environments.

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