MAX4484AXK-T Equivalent & Substitute Parts

Part Overview

The MAX4484AXK-T is a general purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, housed in a 5-TSSOP SC-70-5 package. This device features rail-to-rail output capability and is designed for low-voltage analog signal processing applications. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Amplifier Type	General Purpose	—
Number of Circuits	1	—
Output Type	Rail-to-Rail	—
Package / Case	5-TSSOP, SC-70-5, SOT-353	—
Voltage - Supply Span (Min)	2.7	V
Voltage - Supply Span (Max)	5.5	V
Operating Temperature	-40 to 125	°C
Mounting Type	Surface Mount	—

Substitute Part Grouping Explanation

Substitution of the MAX4484AXK-T is determined by strict adherence to the following criteria:

Mandatory Compatibility Parameters:

Amplifier Type: General Purpose
Number of Circuits: 1
Output Type: Rail-to-Rail
Package / Case: 5-TSSOP, SC-70-5, SOT-353
Voltage Supply Range: 2.7 V to 5.5 V minimum
Operating Temperature Range: -40°C to 125°C minimum
Mounting Type: Surface Mount

All substitute parts listed below satisfy these mandatory parameters. Electrical performance characteristics such as slew rate, gain bandwidth product, input bias current, and supply current vary among substitutes and must be evaluated against specific application requirements. Parts are grouped by manufacturer and product status to facilitate selection based on availability and compliance requirements.

Parameter Comparison

Part Number	Manufacturer	Product Status	Slew Rate (V/µs)	GBW (MHz)	Input Bias (pA/nA)	Input Offset (µV/mV)	Supply Current (µA/mA)	Output Current (mA)	RoHS Status
MAX4484AXK-T	Analog Devices Inc./Maxim	Obsolete	20	7	0.1 pA	300 µV	2.2 mA	33	Non-compliant
LMV321LICT	STMicroelectronics	Active	0.7	1.3	27 nA	1 mV	130 µA	70	ROHS3 Compliant
LMV551MG/NOPB	National Semiconductor	Active	1	3	20 nA	1 mV	37 µA	25	—
LMV551MGX/NOPB	Texas Instruments	Active	1	3	20 nA	1 mV	37 µA	25	ROHS3 Compliant
LMV651MG/NOPB	Texas Instruments	Active	3	12	80 nA	100 µV	116 µA	25	ROHS3 Compliant
LMV651MGX/NOPB	Texas Instruments	Active	3	12	80 nA	100 µV	116 µA	25	ROHS3 Compliant
LMV771MG/NOPB	Texas Instruments	Active	1.4	3.5	0.23 pA	250 µV	600 µA	75	ROHS3 Compliant
LMV771MGX/NOPB	Texas Instruments	Active	1.4	3.5	0.23 pA	250 µV	600 µA	75	ROHS3 Compliant
SM73308MG/NOPB	Texas Instruments	Active	1.4	3.5	0.23 pA	250 µV	600 µA	75	ROHS3 Compliant
SM73308MGE/NOPB	Texas Instruments	Active	1.4	3.5	0.23 pA	250 µV	600 µA	75	ROHS3 Compliant
SM73308MGX/NOPB	Texas Instruments	Active	1.4	3.5	0.23 pA	250 µV	600 µA	75	ROHS3 Compliant

Engineering Selection Recommendations

Product Status Consideration: The MAX4484AXK-T is classified as obsolete. All listed substitute parts are active products with current manufacturing support and availability. Selection of an active substitute ensures long-term supply chain continuity and access to technical support.

Compliance and Certification: All substitute parts listed are ROHS3 compliant or unaffected by REACH regulations, with the exception of LMV551MG/NOPB, for which compliance status is not specified in the provided data. The original MAX4484AXK-T is RoHS non-compliant. Substitution with ROHS3-compliant alternatives is recommended for applications subject to environmental compliance requirements.

Packaging and Mounting: All substitute parts are supplied in 5-TSSOP SC-70-5 SOT-353 packages with surface mount capability, ensuring direct mechanical compatibility with existing PCB layouts designed for the MAX4484AXK-T.

Electrical Performance Trade-offs: Substitute parts exhibit varying electrical characteristics. The LMV321LICT offers the lowest supply current (130 µA) and highest output current capability (70 mA), suitable for power-constrained applications. The LMV651 and SM73308 series provide higher slew rates (3 V/µs) and gain bandwidth products (12 MHz), appropriate for higher-frequency signal processing. The LMV771 series and SM73308 variants maintain input bias current characteristics similar to the original part (0.23 pA), beneficial for high-impedance input applications.

Inventory Availability: LMV771MG/NOPB (28,151 units) and LMV321LICT (23,200 units) offer the highest stock levels, supporting immediate procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can the MAX4484AXK-T be directly replaced with any of the listed substitutes?

A: Direct replacement is possible only if the substitute part satisfies the application's electrical performance requirements. All listed parts share the same package (5-TSSOP SC-70-5), supply voltage range (2.7 V to 5.5 V), and operating temperature range (-40°C to 125°C). However, differences in slew rate, gain bandwidth product, input bias current, and supply current must be evaluated against circuit specifications.

Q: What is the primary reason for substituting the MAX4484AXK-T?

A: The MAX4484AXK-T is obsolete. Substitution is necessary to maintain design continuity and ensure future availability. Active alternatives provide equivalent functionality with improved compliance certifications and ongoing manufacturer support.

Q: Are all substitute parts RoHS compliant?

A: All substitute parts listed are ROHS3 compliant, except LMV551MG/NOPB, for which compliance status is not provided. The original MAX4484AXK-T is RoHS non-compliant. Selection of ROHS3-compliant substitutes is recommended for applications subject to environmental regulations.

Q: Which substitute offers the lowest power consumption?

A: The LMV321LICT exhibits the lowest supply current at 130 µA, making it suitable for battery-powered or power-constrained applications. The LMV551 series offers even lower supply current at 37 µA, though with reduced output current capability (25 mA).

Q: Which substitute provides the highest slew rate and bandwidth?

A: The LMV651MG/NOPB and LMV651MGX/NOPB offer the highest slew rate (3 V/µs) and gain bandwidth product (12 MHz), suitable for applications requiring faster signal processing compared to the original part's 20 V/µs slew rate and 7 MHz bandwidth.

Q: What is the difference between packaging variants (MG, MGX, MGE)?

A: Packaging variants indicate different tape and reel configurations. MG denotes standard tape and reel, MGX denotes cut tape and digi-reel, and MGE denotes tape and reel with extended specifications. All variants are electrically identical and differ only in supply format and handling.

Q: Can the SM73308 series be used as a substitute?

A: Yes. The SM73308MG/NOPB, SM73308MGE/NOPB, and SM73308MGX/NOPB are functionally equivalent to the LMV771 series, with identical electrical specifications. The SM73308 designation indicates these parts are part of the SolarMagic™ series, optimized for solar power applications, but remain compatible with general-purpose amplifier applications.

Q: Is the LMV321LICT suitable for high-impedance input circuits?

A: The LMV321LICT exhibits higher input bias current (27 nA) compared to the original MAX4484AXK-T (0.1 pA) and the LMV771/SM73308 series (0.23 pA). For applications requiring minimal input bias current, the LMV771 or SM73308 variants are preferred.

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