MAX9141ESA-T Equivalent & Substitute Parts

Part Overview

The MAX9141ESA-T is a single-channel comparator with integrated latch functionality, manufactured by Analog Devices Inc./Maxim Integrated. This device features CMOS output with push-pull and TTL compatibility in an 8-SOIC surface mount package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The MAX9141ESA-T operates across a 2.7V to 5.5V supply range with low input offset voltage and moderate propagation delay characteristics suitable for general-purpose comparison applications.

Key Parameters

Parameter	Value	Unit
Supply Voltage Range	2.7V ~ 5.5V	V
Input Offset Voltage (Max)	2mV @ 5V	mV
Input Bias Current (Max)	0.32µA @ 5V	µA
Quiescent Current (Max)	320µA	µA
CMRR / PSRR (Typ)	81.94dB / 81.94dB	dB
Propagation Delay (Max)	40ns	ns
Hysteresis	1.5mV	mV
Operating Temperature	-40°C ~ 85°C	°C
Package Type	8-SOIC (0.154", 3.90mm Width)	—
Output Type	CMOS, Push-Pull, TTL	—
Comparator Type	with Latch	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the MAX9141ESA-T is determined by the following critical parameters:

Primary Substitution Criteria:

Supply voltage range compatibility (minimum 2.7V to 5.5V overlap required)
Output type compatibility (CMOS, Push-Pull, TTL output required)
Comparator functionality (single-channel comparator with latch or general-purpose comparator)
Operating temperature range (-40°C to 85°C minimum)
RoHS3 compliance
Surface mount packaging

Secondary Compatibility Factors:

Input offset voltage (lower or equal to 2mV @ 5V preferred for precision applications)
Propagation delay (40ns or faster preferred for timing-critical applications)
Quiescent current (lower values preferred for power-sensitive designs)
Package footprint compatibility (8-SOIC preferred; smaller packages acceptable with PCB redesign)

The substitute parts listed below meet the primary criteria and are grouped by their specific functional characteristics and packaging options.

Parameter Comparison

Parameter	MAX9141ESA-T	MAX9141ESA+T	LMV7271MFX/NOPB	LMV7271MGX/NOPB	LMV7291MG	MCP65R41T-1202E/CHY	TLV3701QDBVREP
Manufacturer	Analog Devices	Analog Devices	Texas Instruments	Texas Instruments	Texas Instruments	Microchip Technology	Texas Instruments
Supply Voltage (V)	2.7 ~ 5.5	2.7 ~ 5.5	1.8 ~ 5.5, ±0.9 ~ 2.75	1.8 ~ 5.5, ±0.9 ~ 2.75	1.8 ~ 5, ±0.9 ~ 2.5	1.8 ~ 5.5	2.7 ~ 16, ±1.35 ~ 8
Input Offset Voltage (mV @ 5V)	2	2	4	4	4	10	5
Input Bias Current (Max @ 5V)	0.32µA	0.32µA	0.01µA	0.01µA	0.01µA	1pA	250pA
Quiescent Current (Max)	320µA	320µA	14µA	14µA	14µA	4µA	1.2µA
CMRR / PSRR (Typ, dB)	81.94 / 81.94	81.94 / 81.94	78 / 80	78 / 80	78 / 80	70 / 80	88 / 105
Propagation Delay (Max)	40ns	40ns	2.1µs	2.1µs	1.8µs	8µs	240µs
Hysteresis	1.5mV	1.5mV	—	—	—	5mV	—
Operating Temperature (°C)	-40 ~ 85	-40 ~ 85	-40 ~ 85	-40 ~ 85	-40 ~ 85	-40 ~ 125	-40 ~ 125
Output Type	CMOS, Push-Pull, TTL	CMOS, Push-Pull, TTL	CMOS, Push-Pull, Rail-to-Rail	CMOS, Push-Pull, Rail-to-Rail	CMOS, Push-Pull, Rail-to-Rail	CMOS, Push-Pull, TTL	CMOS, Push-Pull, Rail-to-Rail
Comparator Type	with Latch	with Latch	General Purpose	General Purpose	General Purpose	with Voltage Reference	General Purpose
Package	8-SOIC	8-SOIC	SOT-23-5	SC-70-5	SC-70-5	SOT-23-6	SOT-23-5
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Last Time Buy	Active	Active

Engineering Selection Recommendations

Direct Equivalent (Recommended Primary Substitute):

MAX9141ESA+T is the direct functional equivalent of MAX9141ESA-T, differing only in packaging format (Tape & Reel vs. tube). This part maintains identical electrical specifications, 8-SOIC package footprint, and active product status. Selection of MAX9141ESA+T eliminates design changes and provides the highest compatibility assurance. Higher inventory availability (1137 pcs) supports procurement continuity.

Alternative Substitutes (Require Design Evaluation):

LMV7271MFX/NOPB and LMV7271MGX/NOPB (Texas Instruments) provide general-purpose comparator functionality with superior input bias current performance (0.01µA vs. 0.32µA) and lower quiescent current (14µA vs. 320µA). These parts require PCB redesign due to different package types (SOT-23-5 and SC-70-5 respectively) but offer improved power efficiency. Both maintain 2.7V to 5.5V supply compatibility and -40°C to 85°C operating range. Active product status ensures long-term availability.

LMV7291MG (Texas Instruments) offers faster propagation delay (1.8µs) and lower quiescent current but carries Last Time Buy status, limiting future procurement options. Package change to SC-70-5 requires PCB modification.

MCP65R41T-1202E/CHY (Microchip Technology) includes integrated voltage reference functionality with extended operating temperature range (-40°C to 125°C). Higher input offset voltage (10mV) and slower propagation delay (8µs) may impact precision-dependent applications. SOT-23-6 package requires PCB redesign. Active product status supports long-term use.

TLV3701QDBVREP (Texas Instruments) provides the widest supply voltage range (2.7V to 16V, ±1.35V to 8V) and highest PSRR (105dB), suitable for noise-sensitive applications. Significantly slower propagation delay (240µs) restricts use to low-frequency comparison circuits. SOT-23-5 package requires PCB modification. Active product status ensures availability.

Frequently Asked Questions (FAQ)

Q: Can MAX9141ESA+T be used as a direct replacement for MAX9141ESA-T?

A: Yes. MAX9141ESA+T is electrically and functionally identical to MAX9141ESA-T. The only difference is packaging format (Tape & Reel vs. tube). No circuit modifications are required. Both parts use the 8-SOIC package with identical pinout and electrical specifications.

Q: What are the key differences between the MAX9141 series and the LMV7271/LMV7291 series?

A: The MAX9141 series includes integrated latch functionality and operates with fixed hysteresis (1.5mV). The LMV7271/LMV7291 series are general-purpose comparators without latch functionality and without hysteresis. The LMV series offers significantly lower input bias current (0.01µA vs. 0.32µA) and quiescent current (14µA vs. 320µA), making them more suitable for power-constrained applications. However, the LMV series require different package footprints (SOT-23-5 or SC-70-5 vs. 8-SOIC).

Q: Why do some substitute parts have different package types?

A: The MAX9141ESA-T uses an 8-SOIC package. Smaller packages like SOT-23-5 and SC-70-5 offer reduced board space but require PCB redesign, including new footprint layout and trace routing. Package selection depends on available board space and design flexibility. Direct package-compatible substitutes are limited; alternative packages necessitate engineering evaluation.

Q: Which substitute part offers the best power efficiency?

A: MCP65R41T-1202E/CHY provides the lowest quiescent current at 4µA, followed by TLV3701QDBVREP at 1.2µA. However, TLV3701QDBVREP has significantly slower propagation delay (240µs), limiting its use to low-frequency applications. For general-purpose applications requiring both low power and reasonable speed, LMV7271MFX/NOPB or LMV7271MGX/NOPB offer the best balance with 14µA quiescent current and 2.1µs propagation delay.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant, matching the compliance status of the MAX9141ESA-T. This ensures compatibility with environmental and regulatory requirements across all listed alternatives.

Q: What is the significance of "Last Time Buy" status for LMV7291MG?

A: Last Time Buy status indicates that Texas Instruments will discontinue this part after a specified date. While currently available, procurement quantities may be limited, and long-term availability cannot be assured. For new designs or long-term production requirements, active-status alternatives such as LMV7271MGX/NOPB are recommended.

Q: Can TLV3701QDBVREP operate at higher supply voltages than the MAX9141ESA-T?

A: Yes. TLV3701QDBVREP supports supply voltages up to 16V (single supply) or ±8V (dual supply), compared to the MAX9141ESA-T maximum of 5.5V. This extended range makes TLV3701QDBVREP suitable for higher-voltage applications. However, the significantly slower propagation delay (240µs vs. 40ns) restricts its use to low-frequency comparison circuits.

Q: What design considerations apply when switching from 8-SOIC to SOT-23-5 packaging?

A: SOT-23-5 packages are physically smaller than 8-SOIC, requiring PCB footprint redesign, new trace routing, and potential layer stack modifications. Pin assignments may differ; verify pinout compatibility before layout. Thermal management may differ due to reduced package size. Prototype testing is recommended to validate electrical performance in the new package configuration.

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