LMC660AIM Equivalent & Substitute Parts

Part Overview

The LMC660AIM is a CMOS operational amplifier IC manufactured by Texas Instruments, featuring four independent circuits in a 14-SOIC surface mount package. This device is classified as Obsolete, with 2,327 units currently in stock. The LMC660AIM delivers push-pull, rail-to-rail output capability with a slew rate of 1.1 V/µs and a gain bandwidth product of 1.4 MHz, suitable for low-power analog signal processing applications across industrial and consumer electronics.

Due to its obsolete product status, identifying equivalent and substitute parts is essential for design continuity, long-term supply chain reliability, and new product development. Substitute parts must maintain compatibility across electrical performance parameters, mechanical packaging, and operational temperature ranges to ensure seamless integration into existing or new circuit designs.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Output Type	Push-Pull, Rail-to-Rail	—
Slew Rate	1.1	V/µs
Gain Bandwidth Product	1.4	MHz
Current - Input Bias	0.002	pA
Voltage - Input Offset	1	mV
Current - Supply (x4 Channels)	1.5	mA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	4.75	V
Voltage - Supply Span (Max)	15.5	V
Operating Temperature	-40 to 85	°C
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

Substitute parts for the LMC660AIM are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Critical Matching Parameters:

Package type: 14-SOIC surface mount form factor
Number of circuits: Four independent amplifier channels
Output configuration: Rail-to-rail capability
Supply voltage range: Minimum 4.75 V to maximum 15.5 V compatibility
Operating temperature range: -40°C to 85°C minimum coverage
RoHS3 compliance and MSL Level 1 rating

Performance Consideration Parameters:

Slew rate: 1.1 V/µs baseline
Gain bandwidth product: 1.4 MHz baseline
Input bias current: 0.002 pA baseline
Input offset voltage: 1 mV baseline
Output current per channel: 40 mA baseline
Supply current: 1.5 mA per four channels baseline

Substitute parts are grouped into two categories:

Category 1: Direct Texas Instruments Variants LMC660AIM/NOPB and LMC660AIMX/NOPB maintain identical electrical specifications and differ only in packaging format (Tube vs. Cut Tape & Digi-Reel) and product status (Last Time Buy vs. Active).

Category 2: Cross-Manufacturer Alternatives AD8664ARZ, AD8664ARZ-REEL7, AD8669ARZ, AD8669ARZ-REEL7, AD8669ARZ-REEL, MCP6H04-E/SL, MCP6H04T-E/SL, and TS914AIDT provide functional equivalence with enhanced or comparable electrical performance while maintaining 14-SOIC packaging and rail-to-rail output architecture.

Parameter Comparison

Part Number	Manufacturer	Product Status	Amplifier Type	Circuits	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (mV/µV)	Supply Current (mA/µA)	Output Current (mA)	Supply Min (V)	Supply Max (V)	Temp Range (°C)	Package	Packaging
LMC660AIM	Texas Instruments	Obsolete	CMOS	4	1.1	1.4	0.002	1	1.5	40	4.75	15.5	-40 to 85	14-SOIC	—
LMC660AIM/NOPB	Texas Instruments	Last Time Buy	CMOS	4	1.1	1.4	0.002	1	1.5	40	4.75	15.5	-40 to 85	14-SOIC	Tube
LMC660AIMX/NOPB	Texas Instruments	Active	CMOS	4	1.1	1.4	0.002	1	1.5	40	4.75	15.5	-40 to 85	14-SOIC	Cut Tape & Digi-Reel
AD8664ARZ	Analog Devices Inc.	Active	CMOS	4	3.5	4	0.3	0.05	1.25	140	5	16	-40 to 125	14-SOIC	Tube
AD8664ARZ-REEL7	Analog Devices Inc.	Active	CMOS	4	3.5	4	0.3	0.05	1.25	140	5	16	-40 to 125	14-SOIC	Tape & Reel
AD8669ARZ	Analog Devices Inc.	Active	General Purpose	4	0.3	0.54	0.3	0.04	0.23	50	5	16	-40 to 125	14-SOIC	Tube
AD8669ARZ-REEL7	Analog Devices Inc.	Active	General Purpose	4	0.3	0.54	0.3	0.04	0.23	50	5	16	-40 to 125	14-SOIC	Tape & Reel
MCP6H04-E/SL	Microchip Technology	Active	General Purpose	4	0.8	1.2	10	0.7	0.135	50	3.5	16	-40 to 125	14-SOIC	Tube
MCP6H04T-E/SL	Microchip Technology	Active	General Purpose	4	0.8	1.2	10	0.7	0.135	50	3.5	16	-40 to 125	14-SOIC	Tape & Reel
TS914AIDT	STMicroelectronics	Active	CMOS	4	1	1.4	1	5	0.23	60	2.7	16	-40 to 125	14-SOIC	Cut Tape & Digi-Reel

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

LMC660AIMX/NOPB is the recommended primary substitute. This part maintains 100% electrical and mechanical compatibility with the LMC660AIM while offering Active product status and superior supply availability (19,100 units in stock). The Cut Tape & Digi-Reel packaging format accommodates both manual and automated assembly processes. This variant is the optimal choice for new designs or production continuity when the original LMC660AIM becomes unavailable.

LMC660AIM/NOPB serves as a secondary option with Last Time Buy status, suitable for immediate short-term requirements with 1,785 units available in Tube packaging.

For Enhanced Performance Substitution:

AD8664ARZ and AD8664ARZ-REEL7 provide superior electrical performance with 3.5 V/µs slew rate (3.2× faster), 4 MHz gain bandwidth product (2.9× higher), and 140 mA output current per channel (3.5× higher). These Analog Devices parts maintain CMOS architecture, 14-SOIC packaging, and extended operating temperature range (-40°C to 125°C). Active product status ensures long-term availability. Selection is appropriate for applications requiring higher speed, lower input offset voltage (50 µV vs. 1 mV), and greater output drive capability.

For Low-Power Applications:

AD8669ARZ and AD8669ARZ-REEL7 deliver ultra-low supply current (230 µA per four channels vs. 1.5 mA), making them suitable for battery-powered or energy-constrained systems. Trade-offs include reduced slew rate (0.3 V/µs) and lower gain bandwidth product (540 kHz). Active product status and extended temperature range (-40°C to 125°C) support long-term deployment.

For Extended Supply Voltage Range:

MCP6H04-E/SL and MCP6H04T-E/SL support minimum supply voltage of 3.5 V (vs. 4.75 V), enabling operation in lower-voltage systems. Microchip Technology's general-purpose amplifier architecture delivers 1.2 MHz gain bandwidth product and 0.8 V/µs slew rate. Active product status with 12,800+ units in stock ensures supply continuity. Input bias current of 10 pA and input offset voltage of 700 µV represent acceptable trade-offs for cost-sensitive applications.

For Automotive-Grade Applications:

TS914AIDT from STMicroelectronics carries AEC-Q100 automotive qualification with Automotive grade designation. This CMOS amplifier maintains 1.4 MHz gain bandwidth product and 1 V/µs slew rate comparable to the LMC660AIM while supporting extended temperature range (-40°C to 125°C) and lower minimum supply voltage (2.7 V). Active product status with 17,885 units in stock supports high-volume automotive production.

All substitute parts maintain RoHS3 compliance, MSL Level 1 rating, and 14-SOIC surface mount packaging. Selection should be based on specific application requirements for speed, power consumption, supply voltage range, and temperature operating envelope.

Frequently Asked Questions (FAQ)

Q1: Can LMC660AIMX/NOPB directly replace LMC660AIM in existing designs?

Yes. LMC660AIMX/NOPB is electrically and mechanically identical to LMC660AIM. All electrical parameters, supply voltage range (4.75 V to 15.5 V), operating temperature range (-40°C to 85°C), and 14-SOIC package dimensions are equivalent. The only difference is packaging format (Cut Tape & Digi-Reel vs. standard) and product status (Active vs. Obsolete). No circuit modifications are required.

Q2: What are the key differences between AD8664ARZ and the original LMC660AIM?

AD8664ARZ offers enhanced performance: 3.5 V/µs slew rate (vs. 1.1 V/µs), 4 MHz gain bandwidth product (vs. 1.4 MHz), 140 mA output current per channel (vs. 40 mA), and lower input offset voltage (50 µV vs. 1 mV). Supply voltage range is 5 V to 16 V (vs. 4.75 V to 15.5 V), and operating temperature extends to 125°C (vs. 85°C). These improvements make AD8664ARZ suitable for higher-speed applications but may require circuit re-optimization for stability and noise performance.

Q3: Is MCP6H04-E/SL compatible with 4.75 V minimum supply voltage applications?

No. MCP6H04-E/SL has a minimum supply voltage of 3.5 V, which is lower than the LMC660AIM's 4.75 V minimum. However, MCP6H04-E/SL can operate at 4.75 V without issue. The concern is reverse compatibility: if your application requires operation at exactly 4.75 V, MCP6H04-E/SL will function, but designs optimized for the LMC660AIM's 4.75 V minimum may not have been tested at MCP6H04-E/SL's lower threshold. Verify circuit performance at the intended operating voltage.

Q4: Which substitute part is best for battery-powered applications?

AD8669ARZ or AD8669ARZ-REEL7 are optimal for battery-powered designs. Supply current is 230 µA per four channels (vs. 1.5 mA for LMC660AIM), reducing power consumption by approximately 85%. Trade-offs include lower slew rate (0.3 V/µs) and reduced gain bandwidth product (540 kHz). These specifications are acceptable for low-frequency signal conditioning, sensor interfaces, and audio-range applications where speed is not critical.

Q5: Can TS914AIDT be used in automotive applications where AEC-Q100 qualification is required?

Yes. TS914AIDT carries AEC-Q100 automotive qualification and Automotive grade designation. This part is specifically designed for automotive electronics and meets automotive industry reliability and temperature cycling standards. It maintains 14-SOIC packaging, CMOS architecture, and comparable electrical performance (1.4 MHz gain bandwidth product, 1 V/µs slew rate) to the LMC660AIM while supporting extended temperature range (-40°C to 125°C).

Q6: What is the difference between AD8664ARZ and AD8664ARZ-REEL7?

Both parts are electrically identical. The difference is packaging format: AD8664ARZ is supplied in Tube packaging (manual handling), while AD8664ARZ-REEL7 is supplied in Tape & Reel format (automated pick-and-place assembly). Selection depends on manufacturing process: Tube for manual assembly or low-volume production; Tape & Reel for high-volume automated assembly.

Q7: Are all substitute parts RoHS3 compliant?

Yes. All substitute parts listed (LMC660AIM/NOPB, LMC660AIMX/NOPB, AD8664ARZ, AD8664ARZ-REEL7, AD8669ARZ, AD8669ARZ-REEL7, MCP6H04-E/SL, MCP6H04T-E/SL, and TS914AIDT) are RoHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating. All parts are suitable for lead-free soldering processes and meet environmental compliance requirements.

Q8: Which substitute offers the best balance of performance and availability?

LMC660AIMX/NOPB provides the best balance for direct replacement: identical electrical specifications, Active product status, and highest inventory availability (19,100 units). For applications requiring enhanced performance, AD8664ARZ-REEL7 offers superior speed and output drive with 918 units in stock and Active status. For cost-sensitive designs, MCP6H04T-E/SL provides good performance (1.2 MHz gain bandwidth product) with excellent availability (12,900 units) and lower supply voltage capability (3.5 V minimum).

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