MIC809-5SU-TR Equivalent & Substitute Parts

Part Overview

The MIC809-5SU-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 configuration with a 2.93V voltage threshold and 140ms minimum reset timeout. The part is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components for ongoing design requirements and production needs.

Key Parameters

Parameter	Value
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 Low
Reset Timeout	140ms Minimum
Operating Temperature Range	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package	TO-236-3, SC-59, SOT-23-3
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the MIC809-5SU-TR is determined by the following critical parameters: voltage threshold setting, reset timeout duration, output configuration (push-pull totem pole), reset polarity (active low), operating temperature range, and package form factor (SOT-23-3).

Substitute parts are grouped into three categories:

Direct Packaging Equivalent: MIC809-5SUY-TR maintains identical electrical specifications (2.93V threshold, 140ms timeout) with different packaging format (Tape & Reel versus cut tape). This part is functionally interchangeable with identical performance characteristics.

Manufacturer Recommended Alternatives (MCP809 Series): Parts including MCP809T-270I/TT, MCP809T-300I/TT, MCP809T-315I/TT, MCP809T-450I/TT, MCP809T-460I/TT, MCP809T-475I/TT, and MCP809T-485I/TT offer the same functional topology and package but with different voltage threshold settings ranging from 2.625V to 4.725V. These parts share identical reset timeout (150ms minimum), output configuration, and operating temperature range. Selection depends on the specific voltage monitoring requirement of the application.

Parametric Equivalent (TCM809 Series): TCM809SENB713 provides identical electrical specifications to the main part (2.93V threshold, 140ms timeout) with different manufacturer designation. TCM809MENB713 offers similar topology with a 4.38V threshold setting and 140ms timeout.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Reset Timeout	Output	Reset Logic	Operating Temp	Package	Product Status	RoHS Status
MIC809-5SU-TR	Microchip Technology	2.93V	140ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Discontinued	RoHS Non-Compliant
MIC809-5SUY-TR	Microchip Technology	2.93V	140ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MCP809T-270I/TT	Microchip Technology	2.625V	150ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MCP809T-300I/TT	Microchip Technology	2.925V	150ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MCP809T-315I/TT	Microchip Technology	3.075V	150ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MCP809T-450I/TT	Microchip Technology	4.375V	150ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MCP809T-460I/TT	Microchip Technology	4.475V	150ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MCP809T-475I/TT	Microchip Technology	4.625V	150ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
MCP809T-485I/TT	Microchip Technology	4.725V	150ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
TCM809SENB713	Microchip Technology	2.93V	140ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant
TCM809MENB713	Microchip Technology	4.38V	140ms Min	Push-Pull, Totem Pole	Active Low	-40°C ~ 85°C	SOT-23-3	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications): MIC809-5SUY-TR is the primary direct substitute, offering identical voltage threshold (2.93V) and reset timeout (140ms) specifications. This part is currently active in production with ROHS3 compliance, addressing the discontinuation status of the original MIC809-5SU-TR. The difference between these parts is packaging format only (Tape & Reel versus cut tape), with no functional impact on circuit performance.

TCM809SENB713 provides an alternative direct equivalent with identical electrical specifications and active product status with ROHS3 compliance.

For Voltage Threshold Matching: When the application requires a specific voltage threshold different from 2.93V, the MCP809 series offers active alternatives across the voltage range from 2.625V to 4.725V. MCP809T-300I/TT (2.925V) and MCP809T-270I/TT (2.625V) are closest to the original threshold. All MCP809 variants feature 150ms minimum reset timeout compared to the original 140ms specification.

For Compliance Requirements: All substitute parts listed carry ROHS3 compliance status, addressing regulatory requirements that may not be met by the discontinued RoHS non-compliant MIC809-5SU-TR.

Frequently Asked Questions (FAQ)

Q: Can MIC809-5SUY-TR be used as a direct replacement for MIC809-5SU-TR? A: Yes. MIC809-5SUY-TR is functionally identical with the same voltage threshold (2.93V), reset timeout (140ms), output configuration, and operating temperature range. The only difference is packaging format (Tape & Reel). Both parts are SOT-23-3 surface mount packages with identical pinout and electrical behavior.

Q: What is the difference between MCP809T-300I/TT and the original MIC809-5SU-TR? A: MCP809T-300I/TT has a voltage threshold of 2.925V (compared to 2.93V) and reset timeout of 150ms (compared to 140ms). These are minor parametric differences within typical application tolerances. The part is active and ROHS3 compliant. Selection depends on whether the application can tolerate the slightly higher threshold and longer timeout.

Q: Are all substitute parts in the same package? A: Yes. All listed substitute parts use the SOT-23-3 package (TO-236-3, SC-59), maintaining identical physical form factor and pinout compatibility with the original MIC809-5SU-TR.

Q: What does the voltage threshold number represent? A: The voltage threshold is the supply voltage level at which the supervisor IC triggers a reset signal. For example, MIC809-5SU-TR monitors the supply voltage and asserts a reset when voltage drops below 2.93V. Different threshold values (2.625V, 2.925V, 3.075V, 4.375V, etc.) are selected based on the specific power supply voltage being monitored in the application.

Q: Why do some substitute parts have different reset timeout values? A: Reset timeout is the duration the supervisor holds the reset signal active after the supply voltage returns to normal operating levels. The original MIC809-5SU-TR specifies 140ms minimum, while most MCP809 variants specify 150ms minimum. This difference is typically not critical for most applications, but should be verified against specific system requirements.

Q: Is RoHS compliance important for my application? A: RoHS compliance status depends on your application requirements and regional regulations. The original MIC809-5SU-TR is RoHS non-compliant, while all listed substitute parts are ROHS3 compliant. If your design or market requires RoHS compliance, substitute parts must be selected from the compliant options.

Q: Can I use TCM809MENB713 if my application requires 2.93V threshold? A: No. TCM809MENB713 has a 4.38V threshold, which is significantly different from the 2.93V requirement. This part is suitable only for applications monitoring higher voltage supplies. Use TCM809SENB713 instead, which maintains the 2.93V threshold.

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