MIC809TU-TR Equivalent & Substitute Parts

Part Overview

The MIC809TU-TR is a single-channel power management supervisor IC manufactured by Microchip Technology, designed for power-on reset and simple reset applications. This device features push-pull totem pole output configuration in a compact SOT-23-3 surface mount package. The MIC809TU-TR is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	MIC809TU-TR Value
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	3.08V
Output Configuration	Push-Pull, Totem Pole
Reset Logic	Active Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C ~ 85°C
Package / Case	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MIC809TU-TR are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Voltage Threshold: 3.08V (exact match required)
Output Type: Push-Pull, Totem Pole configuration
Reset Logic: Active Low
Reset Timeout: 140ms Minimum
Package: SOT-23-3 (TO-236-3, SC-59) for direct pin-compatible substitution
Number of Channels: Single channel (1)
Mounting Type: Surface Mount

Parts are classified into three substitution categories:

Direct Manufacturer Equivalents maintain identical electrical specifications and package form factor, enabling drop-in replacement without circuit modification.

MFR Recommended Substitutes are manufacturer-endorsed alternatives that meet core functional requirements with potential variations in operating temperature range or reset timeout specifications.

Parametric Equivalents satisfy the critical electrical parameters (threshold voltage, output type, reset logic) and package requirements but may have minor specification differences in secondary parameters.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Timeout (Min)	Operating Temp	Package	Product Status	RoHS Status
MIC809TU-TR	Microchip Technology	3.08V	Push-Pull, Totem Pole	140ms	-40°C ~ 85°C	SOT-23-3	Discontinued	RoHS non-compliant
TCM809TVLB713	Microchip Technology	3.08V	Push-Pull, Totem Pole	140ms	-40°C ~ 125°C	SC-70-3	Active	ROHS3 Compliant
TCM809TVNB713	Microchip Technology	3.08V	Push-Pull, Totem Pole	140ms	-40°C ~ 125°C	SOT-23-3	Active	ROHS3 Compliant
TCM809TENB713	Microchip Technology	3.08V	Push-Pull, Totem Pole	140ms	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
STM809TWX6F	STMicroelectronics	3.08V	Push-Pull, Totem Pole	140ms	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MAX6326UR31+T	Analog Devices Inc./Maxim Integrated	3.08V	Push-Pull, Totem Pole	100ms	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MAX6801UR31D3+T	Analog Devices Inc./Maxim Integrated	3.08V	Push-Pull, Totem Pole	100ms	-40°C ~ 125°C	SOT-23-3	Active	ROHS3 Compliant
MAX809TEUR+T	Analog Devices Inc./Maxim Integrated	3.08V	Push-Pull, Totem Pole	140ms	-40°C ~ 105°C	SOT-23-3	Active	ROHS3 Compliant
APX809-31SAG-7	Diodes Incorporated	3.08V	Push-Pull, Totem Pole	140ms	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Pin-Compatible Replacement (SOT-23-3 Package)

TCM809TENB713 and STM809TWX6F provide direct substitution with identical electrical specifications and package form factor. Both parts are active products with ROHS3 compliance, addressing the RoHS non-compliance status of the discontinued MIC809TU-TR. TCM809TENB713 maintains the original -40°C ~ 85°C operating range, while STM809TWX6F offers equivalent performance from a different manufacturer.

For Enhanced Temperature Range Applications

TCM809TVNB713 extends the operating temperature range to -40°C ~ 125°C while maintaining SOT-23-3 packaging and identical electrical specifications. This part is suitable for applications requiring broader thermal performance.

For Alternative Package Consideration (SC-70-3)

TCM809TVLB713 provides equivalent electrical performance in the SC-70-3 package with extended temperature range (-40°C ~ 125°C). This option is applicable when PCB layout accommodates the smaller SC-70 footprint.

For Maxim Integrated Ecosystem Integration

MAX809TEUR+T matches the 140ms reset timeout specification with active product status and ROHS3 compliance. Operating temperature extends to -40°C ~ 105°C. MAX6801UR31D3+T offers extended temperature range (-40°C ~ 125°C) with 100ms reset timeout, suitable for high-temperature environments where the slightly shorter timeout is acceptable.

For Diodes Incorporated Supply Chain

APX809-31SAG-7 delivers parametric equivalence with 140ms reset timeout, SOT-23-3 packaging, and ROHS3 compliance across the -40°C ~ 85°C range.

All recommended substitutes maintain the critical 3.08V threshold voltage, push-pull totem pole output, and active-low reset logic required for functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can TCM809TVLB713 replace MIC809TU-TR in existing designs?

A: TCM809TVLB713 is electrically equivalent but uses SC-70-3 packaging instead of SOT-23-3. Direct PCB substitution is not possible without layout modification. If SOT-23-3 form factor is required, use TCM809TVNB713 or TCM809TENB713 instead.

Q: What is the difference between TCM809TENB713 and TCM809TVNB713?

A: Both parts are identical in electrical specifications and SOT-23-3 packaging. TCM809TVNB713 extends the operating temperature range to -40°C ~ 125°C, while TCM809TENB713 maintains -40°C ~ 85°C. Select based on application temperature requirements.

Q: Are Maxim Integrated MAX809TEUR+T and MAX6801UR31D3+T interchangeable?

A: Both parts share the 3.08V threshold and push-pull totem pole output. MAX809TEUR+T specifies 140ms reset timeout and -40°C ~ 105°C operation. MAX6801UR31D3+T provides 100ms reset timeout and -40°C ~ 125°C operation. They are not directly interchangeable if reset timeout specification is critical to circuit timing.

Q: Does the MIC809TU-TR RoHS non-compliance affect substitute selection?

A: All active substitute parts listed are ROHS3 compliant. If RoHS compliance is required for new designs or production, select from the active substitute options. The original MIC809TU-TR is discontinued and RoHS non-compliant.

Q: Can MAX6326UR31+T be used as a direct replacement?

A: MAX6326UR31+T meets the 3.08V threshold, push-pull output, and SOT-23-3 package requirements. However, it specifies 100ms minimum reset timeout versus the MIC809TU-TR's 140ms. Verify that the shorter timeout does not affect circuit timing requirements before substitution.

Q: What packaging options are available for MIC809TU-TR substitutes?

A: SOT-23-3 (TO-236-3, SC-59) is the primary package for direct replacement. SC-70-3 packaging is available via TCM809TVLB713 for designs where smaller footprint is acceptable and PCB layout permits modification.

Q: Are all substitute parts available in tape and reel packaging?

A: Packaging formats vary. TCM809TVNB713 and TCM809TENB713 are supplied in cut tape and Digi-Reel format. TCM809TVLB713, MAX6326UR31+T, MAX6801UR31D3+T, MAX809TEUR+T, and APX809-31SAG-7 are available in tape and reel. Verify packaging availability with your supplier for production requirements.

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