LM809M3-2.93 Equivalent & Substitute Parts

Part Overview

The LM809M3-2.93 is a single-channel power management supervisor IC manufactured by Texas Instruments, designed for power-on reset and simple reset applications. This device monitors a single voltage threshold at 2.93V and provides push-pull, totem pole output with active-low reset functionality. The main part number is currently in Last Time Buy status with 28,300 units in stock. Equivalent and substitute parts are necessary to ensure design continuity and supply chain flexibility for applications requiring this supervisor functionality.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
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 ~ 105°C (TA)
Package Type	TO-236-3, SC-59, SOT-23-3
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the LM809M3-2.93 are classified based on strict parametric equivalence. All substitute parts must maintain the following critical parameters:

Single voltage monitoring channel
2.93V threshold voltage
Push-pull, totem pole output configuration
Active-low reset logic
140ms minimum reset timeout
SOT-23-3 package (TO-236-3, SC-59)
Surface mount technology
ROHS3 compliance

Substitutes are grouped into three categories:

Direct Manufacturer Equivalents: Parts from Texas Instruments with identical specifications and packaging, differing only in suffix designations or tape/reel configurations.

Parametric Equivalents: Parts from alternative manufacturers (Analog Devices Inc./Maxim Integrated, Diodes Incorporated, Microchip Technology) that meet all electrical and mechanical parameters while maintaining full functional compatibility.

Cross-Manufacturer Alternatives: Parts from different manufacturers with equivalent functionality but potential variations in operating temperature range or packaging format.

Parameter Comparison

Part Number	Manufacturer	Voltage Threshold	Output Type	Reset Timeout	Operating Temp (TA)	Package	Product Status	Inventory
LM809M3-2.93	Texas Instruments	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 105°C	SOT-23-3	Last Time Buy	28,300 Pcs
LM809M3-2.93/NOPB	Texas Instruments	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 105°C	SOT-23-3	Active	4,379 Pcs
LM809M3X-2.93/NOPB	Texas Instruments	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 105°C	SOT-23-3	Active	35,300 Pcs
MAX809SEUR+T10	Analog Devices Inc./Maxim Integrated	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 105°C	SOT-23-3	Active	869 Pcs
MAX809SEUR+T	Analog Devices Inc./Maxim Integrated	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 105°C	SOT-23-3	Active	107,600 Pcs
MAX809SEUR+	Analog Devices Inc./Maxim Integrated	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 105°C	SOT-23-3	Active	2,015 Pcs
TCM809SVNB713	Microchip Technology	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 125°C	SOT-23-3	Active	5,119 Pcs
APX809S-29SA-7	Diodes Incorporated	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 125°C	SOT-23-3	Active	12,100 Pcs
MIC809SUY-TR	Microchip Technology	2.93V	Push-Pull, Totem Pole	140ms Min	-40°C ~ 85°C	SOT-23-3	Active	2,340 Pcs

Engineering Selection Recommendations

For Direct Replacement: LM809M3-2.93/NOPB and LM809M3X-2.93/NOPB are Texas Instruments parts with identical electrical specifications to the main part number. LM809M3X-2.93/NOPB offers superior inventory availability (35,300 units) and active product status, making it the preferred direct substitute.

For Extended Temperature Range: TCM809SVNB713 (Microchip Technology) and APX809S-29SA-7 (Diodes Incorporated) both support operating temperatures to 125°C, compared to the standard 105°C range. These are suitable for applications requiring enhanced thermal performance while maintaining all other electrical parameters.

For Maximum Inventory Availability: MAX809SEUR+T (Analog Devices Inc./Maxim Integrated) provides the highest stock level at 107,600 units with active product status and full parametric equivalence.

For Temperature-Constrained Applications: MIC809SUY-TR (Microchip Technology) operates within -40°C to 85°C range and is suitable only for applications not requiring the full 105°C upper temperature limit.

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and identical SOT-23-3 packaging, ensuring direct PCB compatibility without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can I substitute LM809M3-2.93 with any of the listed parts without circuit modifications?

A: Yes. All listed substitute parts maintain identical voltage threshold (2.93V), output configuration (push-pull, totem pole), reset logic (active-low), and reset timeout (140ms minimum). The SOT-23-3 package is identical across all parts, requiring no PCB layout changes. However, verify your application's operating temperature requirements against each part's specified range.

Q: What is the difference between LM809M3-2.93 and LM809M3-2.93/NOPB?

A: The /NOPB suffix indicates "No Lead (Pb)" and represents the RoHS-compliant version. Both parts are electrically and mechanically identical. The main difference is product status: LM809M3-2.93 is Last Time Buy, while LM809M3-2.93/NOPB is Active.

Q: Why do some substitute parts support -40°C to 125°C while others support -40°C to 105°C?

A: Operating temperature range is a manufacturing specification that varies by device design and manufacturer process. Parts rated to 125°C (TCM809SVNB713, APX809S-29SA-7) provide extended thermal margin. If your application operates within -40°C to 105°C, both temperature ranges are acceptable. For applications approaching 105°C, select parts with 125°C rating for additional safety margin.

Q: Is the MAX809SEUR+T10 different from MAX809SEUR+T?

A: Both parts are parametrically identical with the same electrical specifications and operating temperature range. The difference is in packaging format: MAX809SEUR+T10 is supplied in Tape & Reel (TR) format, while MAX809SEUR+T is supplied in Cut Tape (CT) & Digi-Reel format. Select based on your procurement and assembly process requirements.

Q: Can I use MIC809SUY-TR if my application requires operation above 85°C?

A: No. MIC809SUY-TR is specified only to 85°C maximum operating temperature. For applications requiring operation above 85°C up to 105°C, use LM809M3-2.93/NOPB, LM809M3X-2.93/NOPB, MAX809SEUR+ variants, or for 125°C operation, use TCM809SVNB713 or APX809S-29SA-7.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original LM809M3-2.93 specifications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message