LMV7271MF Equivalent & Substitute Parts

Part Overview

The LMV7271MF is a general-purpose CMOS comparator manufactured by Texas Instruments, packaged in SOT-23-5 surface mount configuration. This device features rail-to-rail output capability with push-pull architecture, designed for low-voltage applications spanning 1.8V to 5.5V single supply or ±0.9V to ±2.75V dual supply operation. The part is currently in Last Time Buy status, making identification of equivalent and substitute components essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LMV7271MF
Category	Linear Comparator
Type	General Purpose
Package	SOT-23-5 (SC-74A)
Output Type	CMOS, Push-Pull, Rail-to-Rail
Supply Voltage	1.8V ~ 5.5V (Single), ±0.9V ~ 2.75V (Dual)
Input Offset Voltage (Max)	4mV @ 5V
Input Bias Current (Max)	0.01µA @ 5V
Quiescent Current (Max)	14µA
CMRR / PSRR (Typ)	78dB / 80dB
Propagation Delay (Max)	2.1µs
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LMV7271MF is determined by the following critical parameters: output type (CMOS push-pull rail-to-rail capability), supply voltage range compatibility (minimum 1.8V operation), package form factor (SOT-23-5 preferred for direct replacement), input offset voltage performance, quiescent current characteristics, and operating temperature range. Parts are grouped into three categories based on substitution relationship strength:

Parametric Equivalents maintain identical electrical specifications and package form, differing only in packaging configuration (cut tape versus tape & reel) or minor part number suffixes. These provide direct functional replacement.

Manufacturer-Recommended Substitutes from Analog Devices Inc./Maxim Integrated and Microchip Technology offer comparable performance within the general-purpose comparator category but may feature different package options, enhanced specifications in specific parameters, or functional additions such as latch capability or shutdown control. These require design verification for application-specific requirements.

Parameter Comparison

Part Number	Manufacturer	Package	Output Type	Supply Voltage	Input Offset (Max)	Quiescent Current (Max)	Propagation Delay (Max)	Operating Temp	Status
LMV7271MF	Texas Instruments	SOT-23-5	CMOS Push-Pull Rail-to-Rail	1.8V ~ 5.5V	4mV @ 5V	14µA	2.1µs	-40°C ~ 85°C	Last Time Buy
LMV7271MF/NOPB	Texas Instruments	SOT-23-5	CMOS Push-Pull Rail-to-Rail	1.8V ~ 5.5V	4mV @ 5V	14µA	2.1µs	-40°C ~ 85°C	Active
LMV7271MFX/NOPB	Texas Instruments	SOT-23-5	CMOS Push-Pull Rail-to-Rail	1.8V ~ 5.5V	4mV @ 5V	14µA	2.1µs	-40°C ~ 85°C	Active
MAX9140EUK+T	Analog Devices/Maxim	SOT-23-5	CMOS Push-Pull TTL	2.7V ~ 5.5V	2mV @ 5V	300µA	40ns	-40°C ~ 85°C	Active
MAX9141ESA+T	Analog Devices/Maxim	8-SOIC	CMOS Push-Pull TTL	2.7V ~ 5.5V	2mV @ 5V	320µA	40ns	-40°C ~ 85°C	Active
MAX941CSA+T	Analog Devices/Maxim	8-SOIC	CMOS Push-Pull TTL	2.7V ~ 5.5V	2mV @ 5.5V	700µA	80ns	0°C ~ 70°C	Active
MAX941EPA+	Analog Devices/Maxim	8-DIP	CMOS Push-Pull TTL	2.7V ~ 5.5V	2mV @ 5.5V	700µA	80ns	-40°C ~ 85°C	Active
MAX941ESA+	Analog Devices/Maxim	8-SOIC	CMOS Push-Pull TTL	2.7V ~ 5.5V	2mV @ 5.5V	700µA	80ns	-40°C ~ 85°C	Active
MCP6561RT-E/OT	Microchip Technology	SOT-23-5	CMOS Push-Pull Rail-to-Rail TTL	1.8V ~ 5.5V	10mV @ 5.5V	130µA	80ns	-40°C ~ 125°C	Active
MCP6561T-E/LT	Microchip Technology	SC-70-5	CMOS Push-Pull Rail-to-Rail TTL	1.8V ~ 5.5V	10mV @ 5.5V	130µA	80ns	-40°C ~ 125°C	Active
MCP6561UT-E/OT	Microchip Technology	SOT-23-5	CMOS Push-Pull Rail-to-Rail TTL	1.8V ~ 5.5V	10mV @ 5.5V	130µA	80ns	-40°C ~ 125°C	Active

Engineering Selection Recommendations

For direct replacement of LMV7271MF in existing designs, LMV7271MF/NOPB and LMV7271MFX/NOPB from Texas Instruments are the primary choices. Both maintain identical electrical performance and SOT-23-5 packaging, with the primary distinction being packaging configuration (cut tape versus tape & reel). Both parts carry Active product status and full RoHS3 compliance.

For applications requiring active component sourcing with extended availability, MCP6561UT-E/OT from Microchip Technology provides SOT-23-5 package compatibility with identical supply voltage range (1.8V ~ 5.5V). This part offers extended operating temperature range (-40°C ~ 125°C) and maintains rail-to-rail output capability. Input offset voltage is higher at 10mV maximum, and quiescent current is elevated at 130µA, requiring design verification for power-sensitive applications.

MAX9140EUK+T from Analog Devices/Maxim Integrated offers SOT-23-5 package compatibility with superior propagation delay performance (40ns versus 2.1µs) and lower input offset voltage (2mV). However, minimum supply voltage is restricted to 2.7V, eliminating compatibility with 1.8V applications. Quiescent current is significantly higher at 300µA.

Substitutes featuring alternative packages (8-SOIC, 8-DIP, SC-70-5) require PCB layout modifications and are suitable only when package form factor constraints can be accommodated. All substitute parts listed carry RoHS3 compliance and MSL Level 1 rating, matching the original part's environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can LMV7271MF/NOPB be used as a direct replacement for LMV7271MF?

A: Yes. LMV7271MF/NOPB is a parametric equivalent with identical electrical specifications and SOT-23-5 packaging. The primary difference is packaging configuration (tape & reel versus cut tape). Both parts are manufactured by Texas Instruments and maintain the same performance characteristics across all specified parameters.

Q: What is the key limitation when substituting with MAX9140EUK+T?

A: MAX9140EUK+T has a minimum supply voltage of 2.7V, whereas LMV7271MF operates from 1.8V. Applications requiring 1.8V operation cannot use MAX9140EUK+T. Additionally, quiescent current is 300µA compared to 14µA in the original part, significantly impacting power consumption in battery-powered designs.

Q: Is MCP6561UT-E/OT suitable for low-power applications?

A: MCP6561UT-E/OT has quiescent current of 130µA, approximately 9 times higher than LMV7271MF at 14µA. For applications where quiescent current is a critical design parameter, this substitute requires power budget reassessment. The part is suitable for applications where this current level is acceptable.

Q: Why do some substitutes use different package types?

A: MAX9141ESA+T, MAX941 series, and MCP6561T-E/LT use 8-SOIC or 8-DIP packages instead of SOT-23-5. These packages accommodate additional functionality (latch capability in MAX941 series) or different pin configurations. Package changes require PCB redesign and are not recommended for direct board-level substitution.

Q: Are all listed substitutes RoHS3 compliant?

A: Yes. All substitute parts listed carry RoHS3 compliance status and MSL Level 1 moisture sensitivity rating, matching the environmental and regulatory specifications of LMV7271MF.

Q: What is the primary advantage of MCP6561UT-E/OT over other substitutes?

A: MCP6561UT-E/OT maintains SOT-23-5 package compatibility, supports 1.8V minimum supply voltage matching the original part, and offers extended operating temperature range to 125°C. It provides the closest functional match for applications requiring active component sourcing with minimal design modification.

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