LMC6484AIN Equivalent & Substitute Parts

Part Overview

The LMC6484AIN is a CMOS operational amplifier featuring four independent circuits with rail-to-rail output capability. Manufactured by Texas Instruments, this 14-PDIP through-hole component operates across a 3V to 15.5V supply range with ultra-low input bias current of 0.02 pA. The product is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity.

Substiute Parts

LMC6484AIN

Texas InstrumentsIn Stock: 2308LMC6484AIN Datasheet

Current PartRFQ

LMC6484AIN/NOPB

National SemiconductorIn Stock: 1166LMC6484AIN/NOPB Datasheet

DirectRFQ

ALD4704APBL

Advanced Linear Devices Inc.In Stock: 1168ALD4704APBL Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LMC6484AIN is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Amplifier Type: CMOS
• Number of Circuits: 4
• Package / Case: 14-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Output Type: Rail-to-Rail (minimum requirement)

Secondary Compatibility Parameters:

• Voltage - Supply Span range must encompass or overlap the original 3V to 15.5V specification
• Operating Temperature range must support the application requirements
• Current - Output / Channel must meet or exceed application demands

The LMC6484AIN/NOPB qualifies as a direct equivalent, maintaining identical electrical specifications while offering active product status and improved compliance. The ALD4704APBL functions as a functional substitute with enhanced performance characteristics but operates within a narrower supply voltage range (6.5V to 12V) and reduced operating temperature span (0°C to 70°C).

Parameter Comparison

Engineering Selection Recommendations

LMC6484AIN/NOPB (Direct Equivalent): This part maintains complete electrical and thermal equivalence to the original LMC6484AIN while offering active product status and ROHS3 compliance. Selection of LMC6484AIN/NOPB is appropriate for applications requiring identical performance specifications and extended supply voltage range (3V to 15.5V) with full temperature range operation (-40°C to 85°C). This substitute eliminates obsolescence risk while preserving design specifications.

ALD4704APBL (Functional Substitute): The ALD4704APBL provides enhanced performance characteristics including higher slew rate (5V/µs versus 1.3V/µs) and increased gain bandwidth product (2.1 MHz versus 1.5 MHz). However, this substitute operates within a restricted supply voltage range (6.5V to 12V minimum) and narrower operating temperature span (0°C to 70°C). Selection of ALD4704APBL requires verification that application supply voltages remain within 6.5V to 12V and operating temperatures do not exceed 0°C to 70°C boundaries. The ALD4704APBL exhibits higher input bias current (1 pA versus 0.02 pA) and reduced output current per channel (15 mA versus 30 mA), which may impact precision and drive capability requirements.

Frequently Asked Questions (FAQ)

Q: Can LMC6484AIN/NOPB be used as a direct replacement for LMC6484AIN?

A: Yes. The LMC6484AIN/NOPB maintains identical electrical specifications, package configuration, and pin assignment. The primary advantage is active product status and ROHS3 compliance. Both components operate across 3V to 15.5V supply range with -40°C to 85°C temperature range.

Q: What are the key limitations when substituting ALD4704APBL for LMC6484AIN?

A: The ALD4704APBL operates within a narrower supply voltage range (6.5V to 12V) and restricted temperature range (0°C to 70°C). Applications requiring 3V minimum supply voltage or temperatures below 0°C or above 70°C cannot use this substitute. Additionally, input bias current increases from 0.02 pA to 1 pA, and output current per channel decreases from 30 mA to 15 mA.

Q: Are all three parts pin-compatible?

A: Yes. All three components utilize 14-DIP (0.300", 7.62mm) through-hole packaging with identical pin configurations, enabling direct socket substitution without PCB modification.

Q: Which substitute is recommended for new designs?

A: For new designs, LMC6484AIN/NOPB is the preferred substitute, offering complete electrical equivalence with active product status and modern compliance certifications. ALD4704APBL is suitable only when application parameters fall within its restricted supply voltage (6.5V to 12V) and temperature (0°C to 70°C) ranges.

Q: How do supply voltage requirements affect substitute selection?

A: The original LMC6484AIN and LMC6484AIN/NOPB support 3V to 15.5V operation. The ALD4704APBL minimum supply voltage is 6.5V, eliminating its use in applications requiring 3V to 6.5V operation. Verify application supply voltage specifications before selecting ALD4704APBL.

Q: What compliance differences exist between the substitutes?

A: LMC6484AIN is RoHS non-compliant. Both LMC6484AIN/NOPB and ALD4704APBL are ROHS3 compliant. All three components are REACH unaffected and classified as EAR99 for export control purposes.