MIC809SU-TR Equivalent & Substitute Parts

Part Overview

The MIC809SU-TR is a single-channel power management supervisor IC manufactured by Microchip Technology, designed for reset and power-on reset applications. This device features push-pull totem pole output with a 2.93V threshold and 140ms minimum reset timeout. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active product lines. Substitute parts must maintain identical electrical parameters, package compatibility, and functional characteristics to ensure direct replacement capability in existing designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	MIC809SU-TR
Manufacturer	Microchip Technology
Category	Power Management (PMIC)
Package / Case	TO-236-3, SC-59, SOT-23-3
Type	Simple Reset/Power-On Reset
Number of Voltages Monitored	1
Voltage - Threshold	2.93V
Output	Push-Pull, Totem Pole
Reset	Active Low
Reset Timeout	140ms Minimum
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MIC809SU-TR are classified based on strict adherence to the following critical parameters:

Primary Substitution Criteria:

Voltage threshold: 2.93V
Output type: Push-Pull, Totem Pole
Reset polarity: Active Low
Reset timeout: 140ms minimum
Package: SOT-23-3 (TO-236-3, SC-59)
Number of channels: 1
Mounting type: Surface Mount

Grouping Categories:

Category 1: Direct Manufacturer Equivalents (Microchip Technology) Parts maintaining identical electrical specifications and SOT-23-3 packaging with active product status and RoHS3 compliance.

Category 2: Manufacturer Recommended Alternatives (Microchip Technology) Parts with extended operating temperature range (-40°C ~ 125°C) and alternative packaging (SC-70-3) while maintaining all core electrical parameters.

Category 3: Cross-Manufacturer Equivalents Parts from STMicroelectronics and Analog Devices Inc./Maxim Integrated meeting all electrical and package specifications with active product status.

Category 4: Parametric Equivalents with Variations Parts with minor deviations in reset timeout or operating temperature range that remain functionally compatible for most applications.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Timeout (Min)	Operating Temp	Package	Product Status	RoHS Status
MIC809SU-TR	Microchip Technology	2.93V	Push-Pull, Totem Pole	140ms	-40°C ~ 85°C	SOT-23-3	Discontinued	RoHS non-compliant
TCM809SVNB713	Microchip Technology	2.93V	Push-Pull, Totem Pole	140ms	-40°C ~ 125°C	SOT-23-3	Active	ROHS3 Compliant
TCM809SENB713	Microchip Technology	2.93V	Push-Pull, Totem Pole	140ms	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
TCM809SVLB713	Microchip Technology	2.93V	Push-Pull, Totem Pole	140ms	-40°C ~ 125°C	SC-70-3	Active	ROHS3 Compliant
MIC809-5SUY-TR	Microchip Technology	2.93V	Push-Pull, Totem Pole	140ms	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
STM809SWX6F	STMicroelectronics	2.93V	Push-Pull, Totem Pole	140ms	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MAX809SEUR+T	Analog Devices Inc./Maxim Integrated	2.93V	Push-Pull, Totem Pole	140ms	-40°C ~ 105°C	SOT-23-3	Active	ROHS3 Compliant
MAX6326UR29+T	Analog Devices Inc./Maxim Integrated	2.93V	Push-Pull, Totem Pole	100ms	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MAX6801UR29D2+T	Analog Devices Inc./Maxim Integrated	2.93V	Push-Pull, Totem Pole	20ms	-40°C ~ 125°C	SOT-23-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: TCM809SENB713 This Microchip Technology part provides direct electrical equivalence to the MIC809SU-TR with identical voltage threshold (2.93V), output configuration (push-pull totem pole), reset timeout (140ms minimum), and SOT-23-3 packaging. The part maintains the same operating temperature range (-40°C ~ 85°C) as the original and carries ROHS3 compliance with unlimited moisture sensitivity rating. High inventory availability (44,991 pcs) ensures supply continuity.

Secondary Recommendation: TCM809SVNB713 This alternative offers extended operating temperature range (-40°C ~ 125°C) while maintaining all core electrical specifications and SOT-23-3 packaging. ROHS3 compliance and active product status support long-term design viability. Suitable for applications requiring enhanced thermal performance.

Cross-Manufacturer Alternative: STM809SWX6F STMicroelectronics STM809SWX6F provides complete electrical and package equivalence with active product status and ROHS3 compliance. This option supports supply chain diversification while maintaining identical functional characteristics.

Maxim Integrated Option: MAX809SEUR+T Analog Devices Inc./Maxim Integrated MAX809SEUR+T delivers full parameter equivalence with extended operating temperature range (-40°C ~ 105°C). Highest inventory availability (107,600 pcs) among all alternatives ensures immediate procurement capability.

Alternative Consideration: MAX6326UR29+T This part maintains voltage threshold, output type, and package specifications but features reduced reset timeout (100ms minimum versus 140ms). Suitable only for applications where shorter reset delay is acceptable.

Not Recommended: MAX6801UR29D2+T While electrically compatible, this part exhibits significantly reduced reset timeout (20ms minimum), making it unsuitable for designs requiring 140ms minimum reset delay.

Frequently Asked Questions (FAQ)

Q: Can TCM809SENB713 directly replace MIC809SU-TR without PCB modifications? A: Yes. TCM809SENB713 maintains identical voltage threshold (2.93V), output configuration (push-pull totem pole), reset timeout (140ms minimum), and SOT-23-3 packaging. No circuit modifications are required for direct substitution.

Q: What is the difference between TCM809SENB713 and TCM809SVNB713? A: Both parts share identical electrical specifications and SOT-23-3 packaging. The primary difference is operating temperature range: TCM809SENB713 operates -40°C ~ 85°C (matching the original MIC809SU-TR), while TCM809SVNB713 extends to -40°C ~ 125°C. Select based on application thermal requirements.

Q: Why does TCM809SVLB713 use SC-70-3 packaging instead of SOT-23-3? A: TCM809SVLB713 is functionally equivalent but uses SC-70-3 (5-pin) packaging versus SOT-23-3 (3-pin). This requires PCB layout modifications and is not a direct pin-compatible replacement. Use only if PCB redesign is acceptable.

Q: Is MAX6326UR29+T a suitable replacement given its 100ms reset timeout? A: MAX6326UR29+T meets all other specifications but provides 100ms minimum reset timeout versus the required 140ms. Use only if application timing analysis confirms 100ms is acceptable. Otherwise, select alternatives with 140ms minimum timeout.

Q: What is the advantage of selecting MAX809SEUR+T over TCM809SENB713? A: MAX809SEUR+T offers extended operating temperature range (-40°C ~ 105°C) and significantly higher inventory availability (107,600 pcs). Both maintain identical core electrical specifications. Select based on thermal requirements and supply chain preferences.

Q: Are all recommended substitutes RoHS3 compliant? A: Yes. All active product alternatives listed carry ROHS3 compliance certification. The original MIC809SU-TR is RoHS non-compliant; substitution with RoHS3-compliant parts supports regulatory compliance requirements.

Q: Can I use STM809SWX6F for supply chain diversification? A: Yes. STM809SWX6F from STMicroelectronics provides complete electrical and package equivalence with active product status and ROHS3 compliance, supporting multi-source procurement strategies.

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