LMC6042IM Equivalent & Substitute Parts

Part Overview

The LMC6042IM is a CMOS dual-channel operational amplifier manufactured by Texas Instruments, housed in an 8-SOIC surface mount package. This device features push-pull, rail-to-rail output configuration with low input bias current and is designed for general-purpose analog signal processing applications. The LMC6042IM carries a "Not For New Designs" product status, indicating that Texas Instruments has discontinued active development and support for this component. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and access components with active manufacturer support and improved performance characteristics.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
Output Type	Push-Pull, Rail-to-Rail	—
Slew Rate	0.02	V/µs
Gain Bandwidth Product	100	kHz
Current - Input Bias	0.002	pA
Voltage - Input Offset	1	mV
Current - Supply (per Channel)	26	µA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	4.5	V
Voltage - Supply Span (Max)	15.5	V
Operating Temperature	-40 to 85	°C
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
RoHS Status	RoHS non-compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LMC6042IM is determined by compatibility across the following critical parameters: package type (8-SOIC surface mount), number of circuits (dual-channel), output configuration (rail-to-rail capability), supply voltage range (minimum 4.5 V to maximum 15.5 V), operating temperature range (-40°C to 85°C), and mounting technology (surface mount). Substitute parts must maintain electrical compatibility within these boundaries while accommodating the obsolescence status of the original component.

The substitute parts are grouped into two categories:

Direct Packaging Equivalents: Parts that maintain identical or near-identical electrical specifications and packaging, suitable for direct replacement in existing designs.

Performance-Enhanced Alternatives: Parts that offer improved electrical performance characteristics (higher slew rate, greater gain bandwidth product, lower input offset voltage, higher output current capability) while maintaining package compatibility and supply voltage overlap, enabling design upgrades with enhanced performance margins.

Parameter Comparison

Parameter	LMC6042IM	LMC6042IM/NOPB	AD8662ARZ	AD8662ARZ-REEL	AD8662ARZ-REEL7	AD8667ARZ	AD8667ARZ-REEL	AD8667ARZ-REEL7	MAX417CSA+	MAX417CSA+T
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS	General Purpose	General Purpose	General Purpose	General Purpose	General Purpose
Number of Circuits	2	2	2	2	2	2	2	2	2	2
Output Type	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate (V/µs)	0.02	0.02	3.5	3.5	3.5	0.3	0.3	0.3	0.08	0.08
Gain Bandwidth Product (kHz)	100	100	4000	4000	4000	540	540	540	150	150
Current - Input Bias (pA)	0.002	0.002	0.3	0.3	0.3	0.3	0.3	0.3	0.1	0.1
Voltage - Input Offset (mV)	1	1	0.05	0.05	0.05	0.04	0.04	0.04	1	1
Current - Supply per Channel (µA)	26	26	1250	1250	1250	230	230	230	1	1
Current - Output / Channel (mA)	40	40	140	140	140	50	50	50	0.6	0.6
Voltage - Supply Span Min (V)	4.5	4.5	5	5	5	5	5	5	2.5	2.5
Voltage - Supply Span Max (V)	15.5	15.5	16	16	16	16	16	16	10	10
Operating Temperature (°C)	-40 to 85	-40 to 85	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	-40 to 125	0 to 70	0 to 70
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Not For New Designs	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement with Minimal Design Impact:

The LMC6042IM/NOPB (Texas Instruments) serves as the direct equivalent, maintaining identical electrical specifications and 8-SOIC packaging. This part carries ROHS3 compliance status, addressing regulatory requirements while preserving the original design's electrical characteristics. However, this part is classified as Obsolete, limiting long-term availability.

For Active Production with Enhanced Performance:

The AD8662ARZ, AD8662ARZ-REEL, and AD8662ARZ-REEL7 (Analog Devices Inc., DigiTrim® series) are recommended for designs requiring active manufacturer support and improved performance. These CMOS dual-channel amplifiers offer significantly higher slew rate (3.5 V/µs versus 0.02 V/µs), greater gain bandwidth product (4 MHz versus 100 kHz), lower input offset voltage (50 µV versus 1 mV), and higher output current capability (140 mA versus 40 mA per channel). All three variants maintain 8-SOIC packaging, rail-to-rail output, and extended operating temperature range (-40°C to 125°C). Differences between variants are packaging format only: AD8662ARZ (Tube), AD8662ARZ-REEL (Tape & Reel), and AD8662ARZ-REEL7 (Cut Tape & Digi-Reel®). All carry Active product status and ROHS3 compliance.

For General-Purpose Applications with Moderate Performance Requirements:

The AD8667ARZ, AD8667ARZ-REEL, and AD8667ARZ-REEL7 (Analog Devices Inc., DigiTrim® series) provide general-purpose amplification with intermediate performance characteristics. These devices offer slew rate of 0.3 V/µs, gain bandwidth product of 540 kHz, input offset voltage of 40 µV, and output current of 50 mA per channel. All maintain 8-SOIC packaging, rail-to-rail output, and extended operating temperature range. Packaging variants correspond to tube, tape & reel, and cut tape & Digi-Reel® formats. All carry Active product status and ROHS3 compliance.

For Ultra-Low Power Applications:

The MAX417CSA+ and MAX417CSA+T (Analog Devices Inc./Maxim Integrated) are suitable for power-constrained designs, offering extremely low supply current (1 µA per channel) and minimal input bias current (0.1 pA). These general-purpose amplifiers maintain 8-SOIC packaging and rail-to-rail output. Operating temperature range is limited to 0°C to 70°C, and maximum supply voltage is 10 V, restricting applicability to designs within these constraints. Both variants carry Active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the LMC6042IM be directly replaced with the LMC6042IM/NOPB?

A: Yes. The LMC6042IM/NOPB maintains identical electrical specifications, package type (8-SOIC), and circuit configuration (dual-channel CMOS with push-pull, rail-to-rail output). The primary difference is packaging format (Tube versus unspecified) and improved RoHS compliance status (ROHS3 Compliant). However, the LMC6042IM/NOPB is classified as Obsolete, which may limit future availability.

Q: What are the key differences between the AD8662ARZ and AD8667ARZ?

A: Both are dual-channel, rail-to-rail amplifiers in 8-SOIC packages from Analog Devices Inc. The AD8662ARZ is classified as CMOS with higher performance: slew rate of 3.5 V/µs, gain bandwidth product of 4 MHz, and output current of 140 mA per channel. The AD8667ARZ is classified as general-purpose with moderate performance: slew rate of 0.3 V/µs, gain bandwidth product of 540 kHz, and output current of 50 mA per channel. Selection depends on application bandwidth and output current requirements.

Q: Are all substitute parts compatible with the original LMC6042IM supply voltage range?

A: The AD8662ARZ, AD8662ARZ-REEL, AD8662ARZ-REEL7, AD8667ARZ, AD8667ARZ-REEL, and AD8667ARZ-REEL7 support supply voltage from 5 V to 16 V, which overlaps with the LMC6042IM range (4.5 V to 15.5 V) but does not extend to the minimum 4.5 V specification. The MAX417CSA+ and MAX417CSA+T support 2.5 V to 10 V, which does not fully cover the LMC6042IM range. Verify supply voltage compatibility for your specific application.

Q: What is the difference between AD8662ARZ-REEL, AD8662ARZ-REEL7, and AD8662ARZ?

A: These three parts are electrically identical. The differences are packaging formats: AD8662ARZ is supplied in Tube packaging, AD8662ARZ-REEL is supplied in Tape & Reel (TR) format, and AD8662ARZ-REEL7 is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on manufacturing assembly requirements and inventory management preferences.

Q: Can the MAX417CSA+ be used as a substitute for the LMC6042IM in all applications?

A: The MAX417CSA+ is not universally compatible. While it maintains 8-SOIC packaging and dual-channel rail-to-rail configuration, it has significant limitations: maximum supply voltage of 10 V (versus 15.5 V for LMC6042IM), operating temperature range limited to 0°C to 70°C (versus -40°C to 85°C), and substantially lower output current capability (600 µA versus 40 mA per channel). Use only in applications within these constraints.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed carry ROHS3 Compliant status. The original LMC6042IM is RoHS non-compliant. If RoHS compliance is a design requirement, substitute parts must be selected from the provided list.

Q: What is the operating temperature range difference between the LMC6042IM and the AD8662ARZ?

A: The LMC6042IM operates from -40°C to 85°C. The AD8662ARZ extends the upper limit to 125°C, providing a 40°C wider operating range at elevated temperatures. This is beneficial for applications in high-temperature environments or with thermal margin requirements.

Q: How does the slew rate difference affect circuit performance?

A: The LMC6042IM has a slew rate of 0.02 V/µs, limiting the maximum rate of output voltage change. The AD8662ARZ offers 3.5 V/µs (175× faster), and the AD8667ARZ offers 0.3 V/µs (15× faster). Higher slew rate enables faster signal transitions and supports higher-frequency applications. For low-frequency or DC applications, slew rate is not a limiting factor.

Q: Can the LMC6042IM be replaced in a design requiring -40°C to 125°C operation?

A: No. The LMC6042IM maximum operating temperature is 85°C. For extended temperature range to 125°C, use AD8662ARZ, AD8662ARZ-REEL, AD8662ARZ-REEL7, AD8667ARZ, AD8667ARZ-REEL, or AD8667ARZ-REEL7, all of which support -40°C to 125°C operation.

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