MAX473ESA Equivalent & Substitute Parts Reference

Part Overview

The MAX473ESA is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for rail-to-rail applications in 8-SOIC surface mount packaging. This device is classified as obsolete, which necessitates identification of active equivalent and substitute components for new designs and ongoing production requirements. The MAX473ESA operates across a supply voltage range of 2.7V to 5.25V with a slew rate of 17V/µs and gain bandwidth product of 12 MHz, making it suitable for general-purpose amplification circuits requiring moderate bandwidth performance.

Substiute Parts

MAX473ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 4127MAX473ESA Datasheet

Current PartRFQ

MCP6021T-E/SN

Microchip TechnologyIn Stock: 3914MCP6021T-E/SN Datasheet

MFR RecommendedRFQ

MCP6291-E/SN

Microchip TechnologyIn Stock: 3120MCP6291-E/SN Datasheet

MFR RecommendedRFQ

MCP6291T-E/SN

Microchip TechnologyIn Stock: 1954MCP6291T-E/SN Datasheet

MFR RecommendedRFQ

MCP6L91T-E/SN

Microchip TechnologyIn Stock: 4412MCP6L91T-E/SN Datasheet

MFR RecommendedRFQ

TLV2621IDR

Texas InstrumentsIn Stock: 1134TLV2621IDR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX473ESA is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Package compatibility: 8-SOIC (0.154", 3.90mm Width) surface mount
• Amplifier type: General Purpose, single circuit
• Output configuration: Rail-to-Rail
• Supply voltage range: Minimum 2.7V, Maximum 5.25V (substitute must encompass or exceed this range)
• Operating temperature: -40°C to 85°C minimum (substitute may extend upper limit)

Secondary Electrical Parameters:

• Slew rate: 17V/µs (substitute performance may vary)
• Gain bandwidth product: 12 MHz (substitute performance may vary)
• Input bias current: 80 nA (substitute performance may vary)
• Input offset voltage: 700 µV (substitute performance may vary)
• Supply current: 2 mA (substitute performance may vary)

All identified substitute parts meet the primary substitution criteria. Substitute parts from Microchip Technology (MCP6021T-E/SN, MCP6291-E/SN, MCP6291T-E/SN, MCP6L91T-E/SN) and Texas Instruments (TLV2621IDR) are active products with RoHS3 compliance, addressing the obsolescence and compliance limitations of the original MAX473ESA.

Parameter Comparison

Engineering Selection Recommendations

Product Status Considerations:

The MAX473ESA is classified as obsolete, making it unavailable for new production orders. All identified substitute parts are active products with current manufacturing support, except TLV2621IDR which carries Last Time Buy status. For long-term design continuity, preference should be given to active products: MCP6021T-E/SN, MCP6291-E/SN, MCP6291T-E/SN, and MCP6L91T-E/SN.

Compliance and Certification:

The MAX473ESA is RoHS non-compliant. All substitute parts are ROHS3 compliant, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution. All substitute parts maintain REACH Unaffected status and EAR99 export classification, consistent with the original part.

Electrical Performance Trade-offs:

Substitute parts exhibit lower slew rates (7V/µs versus 17V/µs) and slightly reduced gain bandwidth products (10-11 MHz versus 12 MHz). These reductions are acceptable for general-purpose amplification applications where the original MAX473ESA was specified. Substitute parts demonstrate superior input bias current performance (1-2 pA versus 80 nA) and reduced supply current consumption (800 µA to 1 mA versus 2 mA), providing improved power efficiency.

Supply Voltage Range:

All substitute parts support the minimum 2.7V supply requirement of the MAX473ESA. MCP6291-E/SN, MCP6291T-E/SN, and MCP6L91T-E/SN extend the maximum supply voltage to 6V, providing additional design flexibility. TLV2621IDR and MCP6021T-E/SN maintain 5.5V maximum, which encompasses the original 5.25V specification.

Temperature Range Extension:

All substitute parts extend the operating temperature range to -40°C to 125°C, exceeding the original -40°C to 85°C specification. This extension provides improved performance margin for applications requiring extended temperature operation.

Packaging and Mounting:

All substitute parts are supplied in identical 8-SOIC (0.154", 3.90mm Width) surface mount packaging, ensuring direct mechanical and electrical compatibility without PCB redesign.

Frequently Asked Questions (FAQ)

Q1: Can MCP6021T-E/SN directly replace MAX473ESA in existing designs?

A: MCP6021T-E/SN meets all primary substitution criteria: identical 8-SOIC package, general-purpose amplifier configuration, rail-to-rail output, and supply voltage range encompassing 2.7V to 5.25V. The lower slew rate (7V/µs versus 17V/µs) and reduced gain bandwidth product (10 MHz versus 12 MHz) are acceptable for general-purpose applications. Electrical performance verification is required for time-critical or high-frequency signal conditioning circuits.

Q2: What is the difference between MCP6291-E/SN and MCP6291T-E/SN?

A: MCP6291-E/SN is supplied in Tube packaging, while MCP6291T-E/SN is supplied in Tape & Reel (TR) packaging. Both parts are electrically identical with identical electrical specifications. Selection depends on assembly process requirements and inventory management preferences.

Q3: Why does MCP6L91T-E/SN have lower supply current than other substitutes?

A: MCP6L91T-E/SN is optimized for low-power applications with 850 µA supply current compared to 1 mA for MCP6291 variants and MCP6021T-E/SN. This reduced current consumption is achieved through circuit design optimization while maintaining equivalent electrical performance for general-purpose amplification. Selection of MCP6L91T-E/SN is appropriate for battery-powered or power-constrained applications.

Q4: Is TLV2621IDR suitable for new production designs?

A: TLV2621IDR carries Last Time Buy status, indicating limited future availability. While currently available with 1042 pieces in stock, this part is not recommended for new long-term production designs. Active alternatives (MCP6021T-E/SN, MCP6291-E/SN, MCP6291T-E/SN, MCP6L91T-E/SN) are preferred for designs requiring extended production life.

Q5: What are the key electrical differences between substitute parts?

A: Input offset voltage varies from 250 µV (TLV2621IDR) to 3 mV (MCP6291 variants). Supply current ranges from 800 µA (TLV2621IDR, MCP6L91T-E/SN) to 1 mA (MCP6021T-E/SN, MCP6291 variants). Gain bandwidth product ranges from 10 MHz (Microchip variants) to 11 MHz (TLV2621IDR). All parts maintain identical slew rate (7V/µs) and input bias current performance (1-2 pA). Selection depends on specific application requirements for offset voltage accuracy, power consumption, and bandwidth.

Q6: Are all substitute parts RoHS compliant?

A: All identified substitute parts are ROHS3 compliant. The original MAX473ESA is RoHS non-compliant. Substitution with any identified part addresses RoHS compliance requirements for new designs and manufacturing processes subject to environmental regulations.

Q7: Can substitute parts operate at the extended temperature range of -40°C to 125°C?

A: All substitute parts are rated for -40°C to 125°C operation, exceeding the original MAX473ESA specification of -40°C to 85°C. Applications requiring operation above 85°C benefit from this extended temperature rating. Thermal management and circuit design verification remain necessary for high-temperature applications.

Q8: What packaging options are available for substitute parts?

A: MCP6021T-E/SN is supplied in standard packaging (not specified). MCP6291-E/SN is supplied in Tube packaging. MCP6291T-E/SN and MCP6L91T-E/SN are supplied in Tape & Reel (TR) packaging. TLV2621IDR is supplied in Tape & Reel (TR) packaging. All parts use identical 8-SOIC case format. Packaging selection depends on assembly process requirements and volume considerations.