LMC6442IMX Equivalent & Substitute Parts

Part Overview

The LMC6442IMX is a general-purpose operational amplifier featuring dual circuits in an 8-SOIC surface mount package. This device delivers rail-to-rail output capability with ultra-low input bias current, making it suitable for precision analog signal conditioning applications. The LMC6442IMX is classified as obsolete, necessitating identification of active equivalent and substitute components to maintain design continuity and ensure long-term supply availability. Substitute parts must maintain functional compatibility across critical electrical parameters including supply voltage range, output type, circuit count, and thermal operating range.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	2	—
Output Type	Rail-to-Rail	—
Package / Case	8-SOIC (0.154", 3.90mm Width)	—
Mounting Type	Surface Mount	—
Voltage - Supply Span (Min)	1.8	V
Voltage - Supply Span (Max)	11	V
Operating Temperature	-40 to 85	°C
Slew Rate	0.0041	V/µs
Gain Bandwidth Product	10.5	kHz
Current - Input Bias	0.005	pA
Voltage - Input Offset	1.5	mV
Current - Supply (x2 Channels)	1.9	µA
Current - Output / Channel	2.1	mA
RoHS Status	RoHS non-compliant	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the LMC6442IMX is determined by strict adherence to the following critical parameters:

Mandatory Compatibility Criteria:

Dual-circuit configuration (2 circuits minimum)
Rail-to-rail output capability
8-SOIC surface mount package (0.154", 3.90mm width)
Supply voltage range encompassing 1.8 V to 11 V operation
Operating temperature range of -40°C to 85°C

Substitute Classification:

Direct Equivalents maintain all electrical and mechanical specifications within the LMC6442IMX envelope:

LMC6442IMX/NOPB (Texas Instruments) — Active product status with identical electrical performance and RoHS3 compliance

Functional Substitutes provide equivalent circuit functionality with acceptable parameter variations:

TS942IDT and TS942AIDT (STMicroelectronics) — Active products with comparable slew rate, gain bandwidth product, and supply current specifications
MAX407CSA+, MAX407CSA+T, and MAX407ESA+T (Analog Devices Inc./Maxim Integrated) — Active products with rail-to-rail output and dual-circuit configuration

Non-Recommended Substitutes fail to meet critical compatibility requirements:

MAX4217ESA+T — Buffer/voltage feedback amplifier with significantly different slew rate (600 V/µs) and bandwidth characteristics; not suitable for general-purpose amplifier applications requiring LMC6442IMX performance envelope

Parameter Comparison

Parameter	LMC6442IMX	LMC6442IMX/NOPB	TS942IDT	TS942AIDT	MAX407CSA+	MAX407CSA+T	MAX407ESA+	MAX407ESA+T
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
Number of Circuits	2	2	2	2	2	2	2	2
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Package / Case	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC	8-SOIC
Voltage - Supply Span (Min)	1.8 V	1.8 V	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V	2.5 V
Voltage - Supply Span (Max)	11 V	11 V	10 V	10 V	10 V	10 V	10 V	10 V
Operating Temperature	-40 to 85°C	-40 to 85°C	-40 to 85°C	-40 to 85°C	0 to 70°C	0 to 70°C	-40 to 85°C	-40 to 85°C
Slew Rate	0.0041 V/µs	0.0041 V/µs	0.0045 V/µs	0.0045 V/µs	0.005 V/µs	0.005 V/µs	0.005 V/µs	0.005 V/µs
Gain Bandwidth Product	10.5 kHz	10.5 kHz	10 kHz	10 kHz	8 kHz	8 kHz	8 kHz	8 kHz
Current - Input Bias	0.005 pA	0.005 pA	1 pA	1 pA	0.1 pA	0.1 pA	0.1 pA	0.1 pA
Voltage - Input Offset	1.5 mV	1.5 mV	10 mV	5 mV	1 mV	1 mV	1 mV	1 mV
Current - Supply (x2 Channels)	1.9 µA	1.9 µA	1.2 µA	1.2 µA	1 µA	1 µA	1 µA	1 µA
Current - Output / Channel	2.1 mA	2.1 mA	5 mA	5 mA	600 µA	600 µA	600 µA	600 µA
RoHS Status	RoHS non-compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant	RoHS3 Compliant
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount

Engineering Selection Recommendations

Primary Recommendation: LMC6442IMX/NOPB

The LMC6442IMX/NOPB represents the direct equivalent replacement for the obsolete LMC6442IMX. This Texas Instruments product maintains identical electrical specifications across all critical parameters: dual-circuit configuration, rail-to-rail output, 1.8 V to 11 V supply range, and -40°C to 85°C operating temperature. The LMC6442IMX/NOPB carries Active product status and RoHS3 compliance, addressing regulatory requirements and ensuring long-term supply continuity. Current inventory of 8003 pieces supports immediate procurement.

Secondary Recommendations: TS942IDT and TS942AIDT

The STMicroelectronics TS942 series (TS942IDT and TS942AIDT) provides functional substitution with acceptable electrical parameter variations. Both devices maintain the dual-circuit, rail-to-rail configuration in 8-SOIC packaging with -40°C to 85°C operating range. The TS942AIDT exhibits superior input offset voltage specification (5 mV versus 10 mV on TS942IDT), making it preferable for precision applications. Both parts carry Active status and RoHS3 compliance. Supply availability is substantial: TS942IDT (30,300 pieces) and TS942AIDT (35,174 pieces).

Tertiary Recommendations: MAX407 Series

The Analog Devices Inc./Maxim Integrated MAX407 series (MAX407CSA+, MAX407CSA+T, MAX407ESA+, MAX407ESA+T) provides functional substitution with notable parameter trade-offs. All variants maintain dual-circuit, rail-to-rail configuration in 8-SOIC packaging with Active product status and RoHS3 compliance. The MAX407ESA+ and MAX407ESA+T variants support the full -40°C to 85°C operating temperature range, matching the LMC6442IMX thermal envelope. However, the MAX407 series exhibits reduced minimum supply voltage (2.5 V versus 1.8 V) and lower output current capability (600 µA versus 2.1 mA per channel), restricting applicability to designs not requiring extended low-voltage operation or high output drive capability.

Not Recommended: MAX4217ESA+T

The MAX4217ESA+T is classified as a buffer/voltage feedback amplifier with fundamentally different electrical characteristics. The 600 V/µs slew rate and 230 MHz bandwidth represent performance levels incompatible with the LMC6442IMX general-purpose amplifier envelope. This device is unsuitable for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can the LMC6442IMX/NOPB be used as a direct replacement for the LMC6442IMX?

A: Yes. The LMC6442IMX/NOPB is the direct equivalent, maintaining identical electrical specifications and 8-SOIC package configuration. The primary difference is product status (Active versus Obsolete) and RoHS compliance (RoHS3 Compliant versus RoHS non-compliant). Packaging format differs (Tape & Reel versus unspecified), which may require adjustment to procurement and assembly processes.

Q: What are the key differences between TS942IDT and TS942AIDT?

A: Both devices share identical electrical performance except for input offset voltage specification. The TS942AIDT specifies 5 mV maximum input offset voltage, while the TS942IDT specifies 10 mV. For applications requiring tighter offset voltage tolerance, the TS942AIDT is the preferred selection. Both maintain identical supply voltage range (2.5 V to 10 V), operating temperature (-40°C to 85°C), and output current capability (5 mA per channel).

Q: Why does the MAX407 series have a higher minimum supply voltage than the LMC6442IMX?

A: The MAX407 series specifies a minimum supply voltage of 2.5 V, while the LMC6442IMX operates down to 1.8 V. This represents a fundamental design difference between the two amplifier families. Applications requiring operation below 2.5 V supply voltage cannot use MAX407 substitutes and must select either the LMC6442IMX/NOPB or TS942 series alternatives.

Q: Can the MAX407 series be used in applications requiring 2.1 mA output current per channel?

A: No. The MAX407 series specifies maximum output current of 600 µA per channel, which is insufficient for applications requiring the 2.1 mA output capability of the LMC6442IMX. Applications with output current requirements exceeding 600 µA must use LMC6442IMX/NOPB or TS942 series devices.

Q: What is the significance of the operating temperature range difference between MAX407CSA+ and MAX407ESA+?

A: The MAX407CSA+ specifies 0°C to 70°C operating temperature, while MAX407ESA+ and MAX407ESA+T specify -40°C to 85°C. For applications requiring the full -40°C to 85°C thermal envelope of the LMC6442IMX, only the MAX407ESA+ and MAX407ESA+T variants are suitable. The MAX407CSA+ and MAX407CSA+T are restricted to 0°C to 70°C operation.

Q: Are all substitute parts available in the same packaging format as the LMC6442IMX?

A: All substitute parts are available in 8-SOIC surface mount package with 0.154" (3.90mm) width, matching the LMC6442IMX mechanical footprint. However, packaging format (Tube, Tape & Reel, or Cut Tape & Digi-Reel) varies by part number and supplier. Procurement specifications must account for packaging format requirements during component selection.

Q: Does RoHS compliance affect functional compatibility?

A: RoHS compliance does not affect electrical or functional compatibility. The LMC6442IMX is RoHS non-compliant, while all active substitute parts are RoHS3 compliant. RoHS compliance is a regulatory and supply chain consideration, not a functional parameter. Applications subject to RoHS requirements must select from the active substitute parts.

Q: Which substitute part offers the best overall compatibility with the LMC6442IMX?

A: The LMC6442IMX/NOPB provides the highest compatibility, maintaining identical electrical specifications across all parameters. For applications where LMC6442IMX/NOPB is unavailable, the TS942AIDT offers the closest functional match with acceptable parameter variations and full thermal range support (-40°C to 85°C).

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