LMC6042IN/NOPB Equivalent & Substitute Parts

Part Overview

The LMC6042IN/NOPB is a CMOS dual-channel operational amplifier manufactured by Texas Instruments, packaged in an 8-PDIP through-hole configuration. This device features push-pull, rail-to-rail output architecture with a slew rate of 0.02V/µs and a gain bandwidth product of 100 kHz. The LMC6042IN/NOPB is designated as Last Time Buy, indicating discontinued production status. Identification of equivalent and substitute parts is necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	Value
Amplifier Type	CMOS
Number of Circuits	2
Output Type	Push-Pull, Rail-to-Rail
Slew Rate	0.02V/µs
Gain Bandwidth Product	100 kHz
Current - Input Bias	0.002 pA
Voltage - Input Offset	1 mV
Current - Supply	26µA (x2 Channels)
Current - Output / Channel	40 mA
Voltage - Supply Span (Min)	4.5 V
Voltage - Supply Span (Max)	15.5 V
Operating Temperature	-40°C ~ 85°C (TJ)
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LMC6042IN/NOPB is determined by the following critical parameters: amplifier type (CMOS), number of circuits (2), output configuration (push-pull, rail-to-rail), slew rate (0.02V/µs), gain bandwidth product (100 kHz), supply voltage range (4.5V to 15.5V), and package type (8-DIP through-hole).

Group 1: Direct Package Equivalent LMC6062IN/NOPB maintains identical package configuration (8-DIP through-hole), CMOS amplifier type, dual-circuit architecture, and rail-to-rail output. This part is functionally compatible with the LMC6042IN/NOPB while offering improved electrical characteristics and active product status.

Group 2: Package Variant (Surface Mount) LMC6042IMX/NOPB is the surface-mount variant of the LMC6042 base product, utilizing 8-SOIC packaging instead of through-hole DIP. This part shares identical electrical specifications with the LMC6042IN/NOPB but requires PCB redesign for surface-mount assembly.

Group 3: Alternative Amplifier Type MAX407CPA+ is a general-purpose operational amplifier with dual-circuit configuration and rail-to-rail output in 8-DIP through-hole packaging. This part differs in amplifier type (general purpose versus CMOS) and exhibits significantly different electrical characteristics, including lower slew rate (0.005V/µs), lower gain bandwidth product (8 kHz), and reduced supply current (1µA).

Parameter Comparison

Parameter	LMC6042IN/NOPB	LMC6062IN/NOPB	LMC6042IMX/NOPB	MAX407CPA+
Manufacturer	Texas Instruments	Texas Instruments	Texas Instruments	Analog Devices Inc./Maxim Integrated
Amplifier Type	CMOS	CMOS	CMOS	General Purpose
Number of Circuits	2	2	2	2
Output Type	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	Rail-to-Rail
Slew Rate	0.02V/µs	0.035V/µs	0.02V/µs	0.005V/µs
Gain Bandwidth Product	100 kHz	100 kHz	100 kHz	8 kHz
Current - Input Bias	0.002 pA	0.01 pA	0.002 pA	0.1 pA
Voltage - Input Offset	1 mV	100 µV	1 mV	1 mV
Current - Supply	26µA (x2 Channels)	40µA (x2 Channels)	26µA (x2 Channels)	1µA (x2 Channels)
Current - Output / Channel	40 mA	35 mA	40 mA	600 µA
Voltage - Supply Span (Min)	4.5 V	4.5 V	4.5 V	2.5 V
Voltage - Supply Span (Max)	15.5 V	15.5 V	15.5 V	10 V
Operating Temperature	-40°C ~ 85°C (TJ)	-40°C ~ 85°C (TJ)	-40°C ~ 85°C (TJ)	0°C ~ 70°C
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	8-SOIC (0.154", 3.90mm Width)	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Surface Mount	Through Hole
Product Status	Last Time Buy	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

LMC6062IN/NOPB is the primary recommended substitute for the LMC6042IN/NOPB. Both parts share identical package configuration (8-DIP through-hole), CMOS amplifier architecture, dual-circuit topology, and supply voltage range. The LMC6062IN/NOPB maintains active product status with higher inventory availability (4,465 pcs) compared to the LMC6042IN/NOPB (Last Time Buy status). The LMC6062IN/NOPB offers improved input offset voltage (100 µV versus 1 mV) and higher slew rate (0.035V/µs versus 0.02V/µs), providing enhanced performance characteristics. Both parts are ROHS3 compliant and operate across the -40°C to 85°C temperature range.

LMC6042IMX/NOPB is suitable for applications where surface-mount assembly is preferred or required. This part maintains identical electrical specifications to the LMC6042IN/NOPB while utilizing 8-SOIC surface-mount packaging. The LMC6042IMX/NOPB is active product status with substantial inventory (1,789 pcs). PCB redesign is necessary to accommodate the different package footprint.

MAX407CPA+ is not recommended as a direct substitute due to significant electrical parameter differences. The MAX407CPA+ operates with a lower slew rate (0.005V/µs), lower gain bandwidth product (8 kHz), and substantially reduced output current capability (600 µA per channel versus 40 mA). The MAX407CPA+ also operates across a narrower supply voltage range (2.5V to 10V) and temperature range (0°C to 70°C). Selection of MAX407CPA+ requires comprehensive circuit redesign and performance validation.

Frequently Asked Questions (FAQ)

Q: Can LMC6062IN/NOPB directly replace LMC6042IN/NOPB without circuit modification?

A: Yes. Both parts share identical package configuration (8-DIP through-hole), CMOS amplifier type, dual-circuit architecture, push-pull rail-to-rail output, and supply voltage range (4.5V to 15.5V). The LMC6062IN/NOPB offers improved electrical characteristics and is pin-compatible for direct substitution.

Q: What are the key differences between LMC6042IN/NOPB and LMC6062IN/NOPB?

A: The LMC6062IN/NOPB provides superior input offset voltage (100 µV versus 1 mV) and higher slew rate (0.035V/µs versus 0.02V/µs). The LMC6062IN/NOPB draws higher supply current (40µA versus 26µA per channel pair) and provides slightly lower output current (35 mA versus 40 mA per channel). Both parts maintain identical gain bandwidth product (100 kHz) and operating temperature range (-40°C to 85°C).

Q: Is LMC6042IMX/NOPB compatible with through-hole PCB designs?

A: No. The LMC6042IMX/NOPB utilizes 8-SOIC surface-mount packaging (0.154" width) and requires surface-mount assembly. Through-hole PCB designs require the 8-DIP package variant (LMC6042IN/NOPB or LMC6062IN/NOPB).

Q: Why is MAX407CPA+ listed as a substitute if it has different electrical characteristics?

A: MAX407CPA+ is listed as an alternative option for applications where the lower slew rate (0.005V/µs), lower gain bandwidth product (8 kHz), and reduced output current (600 µA per channel) are acceptable. This part is suitable only for low-frequency, low-current applications. Comprehensive circuit analysis and performance testing are required before implementation.

Q: What is the significance of the LMC6042IN/NOPB Last Time Buy status?

A: Last Time Buy status indicates that Texas Instruments has discontinued production of the LMC6042IN/NOPB. Existing inventory (734 pcs) represents the final available stock. The LMC6062IN/NOPB (active status, 4,465 pcs available) is the recommended long-term replacement for new designs and production continuity.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The LMC6042IN/NOPB, LMC6062IN/NOPB, LMC6042IMX/NOPB, and MAX407CPA+ are all ROHS3 compliant with moisture sensitivity level 1 (unlimited). All parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: Can LMC6042IMX/NOPB be used in existing through-hole designs?

A: No. The LMC6042IMX/NOPB requires surface-mount assembly and cannot be installed in through-hole PCB designs without adapter components or PCB redesign. For through-hole applications, use LMC6042IN/NOPB or LMC6062IN/NOPB.

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