LMC662AIN Equivalent & Substitute Parts

Part Overview

The LMC662AIN is a dual-channel CMOS operational amplifier manufactured by Texas Instruments, designed for low-power applications requiring rail-to-rail output capability. This device integrates two independent amplifier circuits in a single 8-DIP package with push-pull output configuration and operates across a wide supply voltage range of 4.75V to 15.5V.

The LMC662AIN is classified as an obsolete product. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability for production, and support long-term system maintenance where original stock becomes depleted or unavailable.

Key Parameters

Parameter	Value	Unit
Amplifier Type	CMOS	—
Number of Circuits	2	—
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 (per Channel)	750	µA
Current - Output / Channel	40	mA
Voltage - Supply Span (Min)	4.75	V
Voltage - Supply Span (Max)	15.5	V
Operating Temperature Range	-40 to 85	°C
Package / Case	8-DIP (0.300", 7.62mm)	—
Mounting Type	Through Hole	—

Substitute Part Grouping Explanation

Substitution of the LMC662AIN is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Criteria:

Amplifier topology (CMOS architecture)
Dual-channel configuration (2 independent circuits)
Output stage characteristics (push-pull, rail-to-rail capability)
Slew rate (1.1 V/µs)
Gain bandwidth product (1.4 MHz)
Input bias current (0.002 pA)
Input offset voltage (1 mV)
Supply current per channel (750 µA)
Output current capability per channel (40 mA)
Supply voltage range (4.75V to 15.5V minimum and maximum)
Operating temperature range (-40°C to 85°C)

Mechanical Equivalence Criteria:

Package type (8-DIP)
Package dimensions (0.300", 7.62mm)
Mounting technology (through-hole)
Pin configuration and pinout compatibility

A substitute part must match all electrical parameters and mechanical specifications without deviation. Parts meeting these criteria are classified as direct equivalents and may be used interchangeably in circuit designs originally specified for the LMC662AIN.

Parameter Comparison

Parameter	LMC662AIN	LMC662AIN/NOPB	Match
Manufacturer	Texas Instruments	National Semiconductor	Different Manufacturer
Amplifier Type	CMOS	CMOS	✓
Number of Circuits	2	2	✓
Output Type	Push-Pull, Rail-to-Rail	Push-Pull, Rail-to-Rail	✓
Slew Rate	1.1 V/µs	1.1 V/µs	✓
Gain Bandwidth Product	1.4 MHz	1.4 MHz	✓
Current - Input Bias	0.002 pA	0.002 pA	✓
Voltage - Input Offset	1 mV	1 mV	✓
Current - Supply (per Channel)	750 µA	750 µA	✓
Current - Output / Channel	40 mA	40 mA	✓
Voltage - Supply Span (Min)	4.75 V	4.75 V	✓
Voltage - Supply Span (Max)	15.5 V	15.5 V	✓
Operating Temperature	-40°C to 85°C	-40°C to 85°C	✓
Package / Case	8-DIP (0.300", 7.62mm)	8-DIP (0.300", 7.62mm)	✓
Mounting Type	Through Hole	Through Hole	✓
Product Status	Obsolete	Active	Different Status

Engineering Selection Recommendations

The LMC662AIN/NOPB is a direct electrical and mechanical equivalent to the LMC662AIN. All specified electrical parameters, including slew rate, gain bandwidth product, input bias current, input offset voltage, supply current, output current capability, and supply voltage range, are identical. Package specifications, mounting technology, and pin configuration are equivalent.

The primary distinction between these parts is product status and manufacturer lineage. The LMC662AIN is classified as obsolete, while the LMC662AIN/NOPB is classified as active. The LMC662AIN/NOPB carries the NOPB designation, indicating lead-free (Pb-free) processing and compliance with RoHS requirements where applicable.

For new designs or production requiring component availability assurance, the LMC662AIN/NOPB is the appropriate selection. For legacy system maintenance or repair where original part specifications must be preserved, the LMC662AIN/NOPB provides functional and physical equivalence.

Frequently Asked Questions (FAQ)

Q: Can the LMC662AIN/NOPB be used as a direct replacement for the LMC662AIN?

A: Yes. The LMC662AIN/NOPB is electrically and mechanically equivalent. All electrical parameters, including amplifier type, channel count, output configuration, slew rate, bandwidth, bias current, offset voltage, supply current, output current, supply voltage range, and operating temperature are identical. Package type, dimensions, and mounting technology are equivalent. Pin-for-pin compatibility is maintained.

Q: What is the significance of the NOPB designation?

A: NOPB indicates that the component has been processed without lead (Pb-free). This designation reflects compliance with lead-free manufacturing standards and RoHS directives where applicable.

Q: Are there differences in performance between the LMC662AIN and LMC662AIN/NOPB?

A: No. Both parts exhibit identical electrical performance across all specified parameters. Functional behavior in circuit applications is equivalent.

Q: Why is the LMC662AIN classified as obsolete?

A: Product obsolescence reflects manufacturer discontinuation decisions. The LMC662AIN/NOPB remains in active production, providing continued availability for applications requiring this device specification.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes. The 8-DIP package dimensions (0.300", 7.62mm), through-hole mounting technology, and pin configuration are identical. No PCB layout modifications are required.

Q: What supply voltage range is supported?

A: Both parts operate across a supply voltage range of 4.75V minimum to 15.5V maximum, supporting single-supply and dual-supply configurations within this range.

Q: What is the maximum output current per channel?

A: Each amplifier channel is rated for 40 mA maximum output current, with push-pull, rail-to-rail output capability.

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