LMC660AIMX Equivalent & Substitute Parts

Part Overview

The LMC660AIMX is a CMOS 4-circuit operational amplifier manufactured by Texas Instruments in a 14-SOIC surface mount package. This device features push-pull, rail-to-rail output configuration with a slew rate of 1.1V/µs and gain bandwidth product of 1.4 MHz. The LMC660AIMX is classified as obsolete product status, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility through matching package type, circuit count, output configuration, and electrical operating parameters within specified tolerance ranges.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	4	—
Output Type	Push-Pull, Rail-to-Rail	—
Package / Case	14-SOIC (0.154", 3.90mm Width)	—
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	1.5 (x4 Channels)	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
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the LMC660AIMX is determined by the following critical parameters: package type (14-SOIC surface mount), circuit count (4 independent amplifiers), output configuration (rail-to-rail), and electrical specifications including supply voltage range, slew rate, gain bandwidth product, and output current capability.

Direct Substitutes (Identical Electrical Performance): The LMC660AIMX/NOPB is a direct Texas Instruments variant with identical electrical specifications and package configuration. This part maintains active product status and serves as the primary direct replacement.

Functional Equivalents (Enhanced Performance): The AD8664ARZ and AD8664ARZ-REEL7 (Analog Devices) provide enhanced electrical performance with higher slew rate (3.5V/µs vs. 1.1V/µs), increased gain bandwidth product (4 MHz vs. 1.4 MHz), and higher output current per channel (140 mA vs. 40 mA). These parts maintain 14-SOIC package compatibility and rail-to-rail output configuration. Extended operating temperature range (-40°C to 125°C) provides additional thermal margin.

Alternative Substitutes (Reduced Performance, Lower Power): The AD8669ARZ, AD8669ARZ-REEL, and AD8669ARZ-REEL7 (Analog Devices) are general-purpose amplifiers with reduced slew rate (0.3V/µs) and gain bandwidth product (540 kHz), but offer significantly lower supply current (230µA vs. 1.5mA per channel set). These parts are suitable for power-constrained applications where bandwidth requirements are less demanding.

The MCP6H04-E/SL and MCP6H04T-E/SL (Microchip Technology) are general-purpose amplifiers with intermediate performance characteristics (0.8V/µs slew rate, 1.2 MHz gain bandwidth product) and extended lower supply voltage limit (3.5V minimum). These parts provide compatibility with lower-voltage system designs.

Parameter Comparison

Part Number	Manufacturer	Product Status	Amplifier Type	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA)	Input Offset (µV)	Supply Current (mA)	Output Current (mA)	Temp Range (°C)	Package
LMC660AIMX	Texas Instruments	Obsolete	CMOS	1.1	1.4	0.002	1000	1.5	40	-40 to 85	14-SOIC
LMC660AIMX/NOPB	Texas Instruments	Active	CMOS	1.1	1.4	0.002	1000	1.5	40	-40 to 85	14-SOIC
AD8664ARZ	Analog Devices	Active	CMOS	3.5	4	0.3	50	1.25	140	-40 to 125	14-SOIC
AD8664ARZ-REEL7	Analog Devices	Active	CMOS	3.5	4	0.3	50	1.25	140	-40 to 125	14-SOIC
AD8669ARZ	Analog Devices	Active	General Purpose	0.3	0.54	0.3	40	0.23	50	-40 to 125	14-SOIC
AD8669ARZ-REEL	Analog Devices	Active	General Purpose	0.3	0.54	0.3	40	0.23	50	-40 to 125	14-SOIC
AD8669ARZ-REEL7	Analog Devices	Active	General Purpose	0.3	0.54	0.3	40	0.23	50	-40 to 125	14-SOIC
MCP6H04-E/SL	Microchip Technology	Active	General Purpose	0.8	1.2	10	700	0.135	50	-40 to 125	14-SOIC
MCP6H04T-E/SL	Microchip Technology	Active	General Purpose	0.8	1.2	10	700	0.135	50	-40 to 125	14-SOIC

Engineering Selection Recommendations

Primary Recommendation: LMC660AIMX/NOPB

The LMC660AIMX/NOPB is the direct equivalent replacement for the obsolete LMC660AIMX. This part maintains identical electrical specifications, package configuration, and functional performance. Active product status ensures long-term availability and supply chain continuity. ROHS3 compliance and MSL Level 1 rating match the original part specifications. Selection of this part eliminates design modification requirements and maintains full backward compatibility.

Secondary Recommendation: AD8664ARZ or AD8664ARZ-REEL7

The AD8664ARZ series provides enhanced electrical performance suitable for applications requiring higher slew rate and gain bandwidth product. These parts maintain 14-SOIC package compatibility and rail-to-rail output configuration. Active product status and extended operating temperature range (-40°C to 125°C) provide design margin. ROHS3 compliance and MSL Level 1 rating satisfy regulatory requirements. Selection of this part requires circuit validation to confirm that enhanced performance characteristics do not introduce stability or noise concerns in existing designs.

Tertiary Recommendation: AD8669ARZ Series or MCP6H04 Series

The AD8669ARZ series and MCP6H04 series are suitable for applications where reduced bandwidth and lower power consumption are acceptable trade-offs. These parts maintain 14-SOIC package compatibility and active product status. The MCP6H04 series extends the lower supply voltage limit to 3.5V, enabling compatibility with lower-voltage system designs. Selection of these parts requires circuit validation to confirm that reduced slew rate and gain bandwidth product meet application timing and frequency response requirements.

Frequently Asked Questions (FAQ)

Q: Can the LMC660AIMX/NOPB be used as a direct replacement for the LMC660AIMX?

A: Yes. The LMC660AIMX/NOPB is a direct equivalent with identical electrical specifications, package type, and functional performance. The primary difference is active product status, ensuring continued availability. No circuit modifications are required.

Q: What are the key differences between the LMC660AIMX and the AD8664ARZ?

A: The AD8664ARZ provides enhanced performance with 3.5V/µs slew rate (versus 1.1V/µs), 4 MHz gain bandwidth product (versus 1.4 MHz), and 140 mA output current per channel (versus 40 mA). Both parts maintain 14-SOIC package compatibility and rail-to-rail output configuration. The AD8664ARZ also extends the operating temperature range to 125°C. Circuit validation is required to confirm compatibility with existing designs.

Q: Are the AD8669ARZ and MCP6H04 suitable replacements for high-speed applications?

A: No. The AD8669ARZ provides 0.3V/µs slew rate and 540 kHz gain bandwidth product, while the MCP6H04 provides 0.8V/µs slew rate and 1.2 MHz gain bandwidth product. Both are significantly reduced compared to the LMC660AIMX (1.1V/µs, 1.4 MHz). These parts are suitable only for applications where reduced bandwidth is acceptable.

Q: Do all substitute parts maintain the same package footprint?

A: Yes. All substitute parts listed use the 14-SOIC package with 0.154" width and 3.90mm body width. PCB footprints are identical, enabling direct physical replacement without layout modifications.

Q: What is the difference between tube and tape & reel packaging options?

A: Tube packaging (CT) is suitable for manual assembly and lower-volume production. Tape & reel packaging (TR) is optimized for automated pick-and-place assembly and higher-volume production. Electrical specifications and functional performance are identical between packaging options for the same part number base.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original LMC660AIMX specifications.

Q: Can the MCP6H04 be used in designs with supply voltages below 4.75V?

A: Yes. The MCP6H04 series supports minimum supply voltage of 3.5V, compared to 4.75V for the LMC660AIMX. This enables compatibility with lower-voltage system designs. Circuit validation is required to confirm performance at reduced supply voltages.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message