LMV7271MG Equivalent & Substitute Parts

Part Overview

The LMV7271MG is a general-purpose CMOS comparator manufactured by Texas Instruments, housed in a 5-TSSOP (SC-70-5) surface-mount package. This device features rail-to-rail output capability and operates across a supply voltage range of 1.8V to 5.5V (single supply) or ±0.9V to 2.5V (dual supply). The LMV7271MG is classified as Last Time Buy, indicating that finding functionally equivalent alternatives is necessary for long-term design continuity and inventory planning.

Key Parameters

Parameter	Value
Manufacturer	Texas Instruments
Part Number	LMV7271MG
Package Type	5-TSSOP, SC-70-5, SOT-353
Mounting Type	Surface Mount
Comparator Type	General Purpose
Output Type	CMOS, Push-Pull, Rail-to-Rail
Supply Voltage (Single/Dual)	1.8V ~ 5.5V / ±0.9V ~ 2.5V
Input Offset Voltage (Max)	4mV @ 5V
Input Bias Current (Max)	0.001µA @ 5V
Quiescent Current (Max)	14µA
Propagation Delay (Max)	2.1µs
Operating Temperature	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the LMV7271MG is determined by the following critical parameters:

Package compatibility: 5-TSSOP (SC-70-5, SOT-353) surface-mount package
Supply voltage range: Minimum 1.8V single supply capability
Output type: CMOS, Push-Pull configuration
Comparator function: General-purpose operation
Operating temperature: -40°C to 85°C minimum
Compliance: ROHS3 and REACH requirements

Substitute parts are grouped into two categories:

Category 1 - Direct Package Match (SC-70-5): Parts maintaining identical 5-TSSOP packaging, enabling direct PCB footprint compatibility without layout modification.

Category 2 - Functional Equivalents (Alternative Packages): Parts meeting electrical specifications but in different surface-mount packages (SOT-23-5, SOT-23-8, 8-TSSOP), requiring PCB redesign but offering enhanced performance or feature sets.

Parameter Comparison

Part Number	Manufacturer	Package	Supply Voltage	Input Offset (Max)	Input Bias (Max)	Quiescent Current (Max)	Propagation Delay (Max)	Output Type	Product Status
LMV7271MG	Texas Instruments	SC-70-5	1.8V ~ 5.5V	4mV @ 5V	0.001µA @ 5V	14µA	2.1µs	CMOS, Push-Pull, Rail-to-Rail	Last Time Buy
LMV7271MG/NOPB	Texas Instruments	SC-70-5	1.8V ~ 5.5V	4mV @ 5V	0.01µA @ 5V	14µA	2.1µs	CMOS, Push-Pull, Rail-to-Rail	Active
ADCMP371AKSZ-REEL7	Analog Devices Inc.	SC-70-5	2.25V ~ 5.5V	9mV @ 5.5V	0.05µA @ 5.5V	7µA	5µs	Push-Pull	Active
MAX9140EXK+T	Analog Devices Inc./Maxim Integrated	SC-70-5	2.7V ~ 5.5V	2mV @ 5V	0.32µA @ 5V	300µA	40ns	CMOS, Push-Pull, TTL	Active
MAX9140EUK+T	Analog Devices Inc./Maxim Integrated	SOT-23-5	2.7V ~ 5.5V	2mV @ 5V	0.32µA @ 5V	300µA	40ns	CMOS, Push-Pull, TTL	Active
MAX9141EKA+T	Analog Devices Inc./Maxim Integrated	SOT-23-8	2.7V ~ 5.5V	2mV @ 5V	0.32µA @ 5V	320µA	40ns	CMOS, Push-Pull, TTL	Active
MAX941EPA+	Analog Devices Inc./Maxim Integrated	8-DIP	2.7V ~ 5.5V	2mV @ 5.5V	0.15µA @ 5.5V	700µA	80ns	CMOS, Push-Pull, TTL	Active
MAX941EUA+	Analog Devices Inc./Maxim Integrated	8-TSSOP	2.7V ~ 5.5V	3mV @ 5.5V	0.15µA @ 5.5V	700µA	80ns	CMOS, Push-Pull, TTL	Active
MCP6561T-E/OT	Microchip Technology	SOT-23-5	1.8V ~ 5.5V	10mV @ 5.5V	1pA @ 5.5V	130µA	80ns	CMOS, Push-Pull, Rail-to-Rail, TTL	Active
MCP6561RT-E/OT	Microchip Technology	SOT-23-5	1.8V ~ 5.5V	10mV @ 5.5V	1pA @ 5.5V	130µA	80ns	CMOS, Push-Pull, Rail-to-Rail, TTL	Active
MCP65R41T-1202E/CHY	Microchip Technology	SOT-23-6	1.8V ~ 5.5V	10mV @ 5.5V	1pA @ 5.5V	4µA	8µs	CMOS, Push-Pull, TTL	Active

Engineering Selection Recommendations

For direct PCB footprint replacement without layout modification:

LMV7271MG/NOPB (Texas Instruments) is the primary substitute, maintaining identical SC-70-5 packaging and electrical characteristics while offering Active product status. This part is recommended when design continuity and minimal PCB changes are required.

ADCMP371AKSZ-REEL7 (Analog Devices Inc.) provides SC-70-5 package compatibility with lower quiescent current (7µA versus 14µA), beneficial for battery-powered applications. However, the minimum supply voltage is 2.25V, restricting use in ultra-low-voltage designs below this threshold.

MAX9140EXK+T (Analog Devices Inc./Maxim Integrated) offers SC-70-5 compatibility with superior propagation delay performance (40ns versus 2.1µs) and lower input offset voltage (2mV), suitable for high-speed comparator applications. Minimum supply voltage is 2.7V.

For applications permitting package redesign:

MCP6561T-E/OT and MCP6561RT-E/OT (Microchip Technology) in SOT-23-5 packaging maintain 1.8V minimum supply voltage and rail-to-rail output capability. These parts feature extremely low input bias current (1pA) and are suitable for high-impedance input applications.

MCP65R41T-1202E/CHY (Microchip Technology) in SOT-23-6 packaging integrates an internal voltage reference, reducing external component count. Quiescent current is exceptionally low at 4µA, optimizing power consumption in portable applications.

All substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements equivalent to the original LMV7271MG.

Frequently Asked Questions (FAQ)

Q: Can LMV7271MG/NOPB be used as a direct replacement for LMV7271MG?

A: Yes. Both parts share identical SC-70-5 packaging, electrical specifications, and operating temperature range. The primary difference is packaging format (Tape & Reel versus Cut Tape) and product status (Active versus Last Time Buy). No PCB modifications are required.

Q: What is the minimum supply voltage requirement for substitute parts?

A: LMV7271MG, LMV7271MG/NOPB, MCP6561T-E/OT, MCP6561RT-E/OT, and MCP65R41T-1202E/CHY support 1.8V minimum supply voltage. ADCMP371AKSZ-REEL7 requires 2.25V minimum. MAX9140 and MAX941 series require 2.7V minimum. Verify your application's supply voltage against the substitute part's specification before selection.

Q: Which substitute offers the fastest propagation delay?

A: MAX9140EXK+T and MAX9140EUK+T provide 40ns propagation delay, significantly faster than the LMV7271MG's 2.1µs. This performance advantage is suitable for high-speed signal detection applications. However, these parts require 2.7V minimum supply voltage and exhibit higher quiescent current (300µA).

Q: Are all substitute parts available in SC-70-5 packaging?

A: No. LMV7271MG/NOPB, ADCMP371AKSZ-REEL7, and MAX9140EXK+T maintain SC-70-5 packaging for direct PCB compatibility. MCP6561T-E/OT, MCP6561RT-E/OT, and MCP65R41T-1202E/CHY use alternative surface-mount packages (SOT-23-5, SOT-23-6), requiring PCB layout redesign. MAX941EPA+ uses 8-DIP through-hole packaging.

Q: Which substitute has the lowest quiescent current?

A: MCP65R41T-1202E/CHY offers 4µA quiescent current, the lowest among all listed substitutes. This part integrates an internal voltage reference and is optimized for low-power applications. ADCMP371AKSZ-REEL7 provides 7µA, also suitable for power-constrained designs.

Q: Do all substitutes maintain rail-to-rail output capability?

A: LMV7271MG, LMV7271MG/NOPB, MCP6561T-E/OT, MCP6561RT-E/OT, and MCP65R41T-1202E/CHY explicitly specify rail-to-rail output. ADCMP371AKSZ-REEL7 and MAX9140 series specify push-pull output without explicit rail-to-rail designation. Verify output swing requirements in your application before substitution.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and REACH unaffected status, meeting environmental and regulatory requirements equivalent to the original LMV7271MG.

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