LMC6484IMX Equivalent & Substitute Parts

Part Overview

The LMC6484IMX is a CMOS operational amplifier featuring four independent circuits in a 14-SOIC surface mount package. This device provides rail-to-rail output capability with low input bias current and is designed for general-purpose analog signal processing applications. The LMC6484IMX is classified as obsolete, making identification of active equivalent and substitute parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Amplifier Type	CMOS
Number of Circuits	4
Output Type	Rail-to-Rail
Slew Rate	1.3 V/µs
Gain Bandwidth Product	1.5 MHz
Current - Input Bias	0.02 pA
Voltage - Input Offset	110 µV
Current - Supply	2.6 mA (x4 Channels)
Current - Output / Channel	30 mA
Voltage - Supply Span (Min)	3 V
Voltage - Supply Span (Max)	15.5 V
Operating Temperature	-40°C ~ 85°C (TJ)
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the LMC6484IMX is determined by the following critical parameters:

Functional Equivalence Criteria:

Amplifier Type: CMOS
Number of Circuits: 4
Output Type: Rail-to-Rail
Package / Case: 14-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Electrical Performance Compatibility:

Slew Rate: 1.3 V/µs (minimum acceptable)
Gain Bandwidth Product: 1.5 MHz (minimum acceptable)
Current - Input Bias: 0.02 pA (maximum acceptable)
Voltage - Input Offset: 110 µV (maximum acceptable)
Current - Output / Channel: 30 mA (minimum acceptable)
Voltage - Supply Span: 3 V to 15.5 V (operating range)
Operating Temperature: -40°C ~ 85°C (minimum acceptable)

Substitute parts are grouped into two categories:

Category 1: Direct Manufacturer Equivalent LMC6484IMX/NOPB is the direct equivalent from Texas Instruments with identical electrical specifications and packaging. This part maintains active product status and is the preferred substitute when available.

Category 2: Cross-Manufacturer Alternatives TS914AIDT, TS914AIYDT, and TS914IDT from STMicroelectronics provide functional substitution with enhanced specifications in certain parameters. These parts meet or exceed the core functional requirements while offering automotive-grade qualification and extended operating temperature range.

Parameter Comparison

Parameter	LMC6484IMX	LMC6484IMX/NOPB	TS914AIDT	TS914AIYDT	TS914IDT
Manufacturer	Texas Instruments	Texas Instruments	STMicroelectronics	STMicroelectronics	STMicroelectronics
Product Status	Obsolete	Active	Active	Active	Active
Amplifier Type	CMOS	CMOS	CMOS	CMOS	CMOS
Number of Circuits	4	4	4	4	4
Output Type	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail	Rail-to-Rail
Slew Rate	1.3 V/µs	1.3 V/µs	1 V/µs	1 V/µs	1 V/µs
Gain Bandwidth Product	1.5 MHz	1.5 MHz	1.4 MHz	1.4 MHz	1.4 MHz
Current - Input Bias	0.02 pA	0.02 pA	1 pA	1 pA	1 pA
Voltage - Input Offset	110 µV	110 µV	5 mV	5 mV	10 mV
Current - Supply	2.6 mA (x4)	2.6 mA (x4)	230 µA	230 µA	230 µA
Current - Output / Channel	30 mA	30 mA	60 mA	60 mA	60 mA
Voltage - Supply Span (Min)	3 V	3 V	2.7 V	2.7 V	2.7 V
Voltage - Supply Span (Max)	15.5 V	15.5 V	16 V	16 V	16 V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Grade	Standard	Standard	Automotive	Automotive	Automotive
Qualification	None Listed	None Listed	AEC-Q100	AEC-Q100	AEC-Q100

Engineering Selection Recommendations

Primary Selection: LMC6484IMX/NOPB

The LMC6484IMX/NOPB is the recommended substitute for the obsolete LMC6484IMX. This part is manufactured by Texas Instruments with identical electrical specifications and package configuration. The primary advantage is active product status with confirmed inventory availability (15,800 pcs). The /NOPB designation indicates lead-free, RoHS3 compliant packaging. This part maintains full compatibility with existing designs without circuit modification.

Secondary Selection: TS914AIDT, TS914AIYDT, TS914IDT

The STMicroelectronics TS914 series (TS914AIDT, TS914AIYDT, TS914IDT) provides functional substitution with enhanced specifications and automotive-grade qualification (AEC-Q100). These parts offer:

Extended operating temperature range (-40°C ~ 125°C vs. -40°C ~ 85°C)
Reduced supply current (230 µA vs. 2.6 mA per four channels)
Increased output current capability (60 mA vs. 30 mA per channel)
Expanded supply voltage range (2.7 V to 16 V vs. 3 V to 15.5 V)
Automotive-grade reliability qualification

The TS914 series is suitable for applications requiring enhanced thermal performance, lower power consumption, or automotive-grade reliability. Differences in input offset voltage (5-10 mV vs. 110 µV) and input bias current (1 pA vs. 0.02 pA) must be evaluated for precision analog applications.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status. The TS914 series provides additional automotive qualification through AEC-Q100 certification, suitable for automotive and industrial applications requiring enhanced reliability standards.

Frequently Asked Questions (FAQ)

Q1: Can LMC6484IMX/NOPB be used as a direct replacement for LMC6484IMX?

A: Yes. LMC6484IMX/NOPB is the direct equivalent with identical electrical specifications, package configuration, and pin assignment. The /NOPB designation indicates lead-free, RoHS3 compliant packaging. No circuit modification is required.

Q2: What are the key differences between LMC6484IMX and TS914AIDT?

A: Both devices are four-channel CMOS rail-to-rail amplifiers in 14-SOIC packages. The TS914AIDT offers extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C), significantly lower supply current (230 µA vs. 2.6 mA), higher output current per channel (60 mA vs. 30 mA), and automotive-grade AEC-Q100 qualification. The LMC6484IMX provides superior input offset voltage (110 µV vs. 5-10 mV) and input bias current (0.02 pA vs. 1 pA).

Q3: Are TS914AIDT, TS914AIYDT, and TS914IDT interchangeable?

A: These three parts are functionally equivalent with identical package, pin configuration, and core electrical specifications. The primary difference is input offset voltage specification: TS914AIDT specifies 5 mV maximum, TS914AIYDT specifies 5 mV maximum, and TS914IDT specifies 10 mV maximum. Selection depends on precision requirements for the specific application.

Q4: Can TS914 series parts be used in applications originally designed for LMC6484IMX?

A: TS914 series parts provide functional substitution for most applications. The 14-SOIC package and pin configuration are identical. However, applications requiring input offset voltage below 10 mV or input bias current below 1 pA may require circuit redesign or performance verification. The extended operating temperature range and reduced power consumption of TS914 series make them suitable for enhanced performance requirements.

Q5: What is the significance of the /NOPB designation on LMC6484IMX/NOPB?

A: The /NOPB designation indicates "No Plumbum" (lead-free) packaging. This part is manufactured to RoHS3 compliance standards with lead-free solder and compatible materials. This designation is standard for current production parts and indicates compliance with environmental regulations.

Q6: Are all substitute parts available in the same packaging options?

A: LMC6484IMX/NOPB is available in Cut Tape (CT) and Digi-Reel packaging. TS914AIDT is available in Cut Tape (CT) and Digi-Reel packaging. TS914AIYDT packaging information is not specified in available data. TS914IDT is available in Cut Tape (CT) and Digi-Reel packaging. Verify packaging availability with the supplier for specific procurement requirements.

Q7: Which substitute part is recommended for automotive applications?

A: TS914AIDT, TS914AIYDT, and TS914IDT are all automotive-grade parts with AEC-Q100 qualification. These parts are recommended for automotive applications requiring reliability certification. LMC6484IMX/NOPB is standard-grade without automotive qualification.

Q8: What is the impact of lower slew rate on TS914 series compared to LMC6484IMX?

A: The TS914 series has a slew rate of 1 V/µs compared to 1.3 V/µs for LMC6484IMX. This represents a 23% reduction in slew rate. For applications with high-frequency signal transitions or fast settling time requirements, this difference must be evaluated. Most general-purpose analog applications operate within acceptable performance margins with the TS914 slew rate.

Q9: How does the reduced supply current of TS914 series affect circuit design?

A: The TS914 series draws 230 µA total supply current compared to 2.6 mA for LMC6484IMX, representing an 88% reduction. This significantly reduces power dissipation and thermal load, particularly beneficial in battery-powered or thermally constrained applications. No circuit modification is required; the reduced current is an inherent advantage of the TS914 design.

Q10: What compliance certifications apply to all substitute parts?

A: All substitute parts (LMC6484IMX/NOPB and TS914 series) are ROHS3 compliant, MSL Level 1 rated, and REACH unaffected. TS914 series parts additionally carry AEC-Q100 automotive qualification. All parts are suitable for commercial and industrial applications with appropriate environmental compliance.

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