MAX473CSA Equivalent & Substitute Parts Reference

Part Overview

The MAX473CSA is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, housed in an 8-SOIC surface mount package. This device is classified as obsolete, indicating it is no longer in active production. The MAX473CSA features rail-to-rail output capability and is designed for general-purpose amplification applications requiring low-power operation across a 2.7V to 5.25V supply range.

Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity, production planning, and long-term component availability. Active alternative parts from Microchip Technology and Texas Instruments provide equivalent or superior electrical performance while maintaining compatibility with existing 8-SOIC footprints.

Substiute Parts

MAX473CSA

Analog Devices Inc./Maxim IntegratedIn Stock: 12814MAX473CSA 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 MAX473CSA is determined by strict adherence to the following electrical and mechanical parameters:

Primary Compatibility Criteria:

• Package / Case: 8-SOIC (0.154", 3.90mm Width) — all substitutes must match this footprint
• Mounting Type: Surface Mount — all substitutes must be surface mount
• Amplifier Type: General Purpose — functional category must remain unchanged
• Number of Circuits: 1 — single amplifier configuration required
• Output Type: Rail-to-Rail — output swing capability must be maintained

Electrical Performance Parameters:

• Voltage - Supply Span (Min): 2.7V minimum or lower (MAX473CSA operates from 2.7V)
• Voltage - Supply Span (Max): 5.25V maximum or higher (MAX473CSA operates to 5.25V)
• Slew Rate: 17V/µs (MAX473CSA baseline; substitutes may differ)
• Gain Bandwidth Product: 12 MHz (MAX473CSA baseline; substitutes may differ)
• Current - Input Bias: 80 nA (MAX473CSA baseline; substitutes may differ)
• Voltage - Input Offset: 700 µV (MAX473CSA baseline; substitutes may differ)
• Current - Supply: 2 mA (MAX473CSA baseline; substitutes may differ)

All identified substitute parts maintain the 8-SOIC package, surface mount configuration, general-purpose amplifier classification, single-circuit topology, and rail-to-rail output type. Electrical parameters may vary within acceptable ranges for general-purpose amplification applications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Considerations:

The MAX473CSA is classified as obsolete, making it unavailable for new production orders. All identified substitute parts are either active (MCP6021T-E/SN, MCP6291-E/SN, MCP6291T-E/SN, MCP6L91T-E/SN) or in Last Time Buy status (TLV2621IDR), ensuring long-term component availability for ongoing designs.

Compliance and Certification:

All substitute parts are ROHS3 compliant, whereas the MAX473CSA is RoHS non-compliant. This distinction is significant for applications subject to RoHS regulations. All substitute parts carry REACH Unaffected status and EAR99 ECCN classification, matching the regulatory profile of the original part.

Active Product Recommendations:

For new designs and production continuity, the following active parts are recommended:

• MCP6021T-E/SN (Microchip Technology): Active status, ROHS3 compliant, 10 MHz gain bandwidth product, 500 µV input offset voltage, 1 pA input bias current, 3846 units in stock
• MCP6291T-E/SN (Microchip Technology): Active status, ROHS3 compliant, 10 MHz gain bandwidth product, 3 mV input offset voltage, 1 pA input bias current, 1900 units in stock, Tape & Reel packaging
• MCP6L91T-E/SN (Microchip Technology): Active status, ROHS3 compliant, 10 MHz gain bandwidth product, 1 mV input offset voltage, 1 pA input bias current, 850 µA supply current, 4342 units in stock, Tape & Reel packaging

Last Time Buy Consideration:

TLV2621IDR (Texas Instruments) is in Last Time Buy status with 1042 units in stock. This part offers 11 MHz gain bandwidth product and 250 µV input offset voltage but should be evaluated for long-term availability constraints.

Packaging Availability:

MCP6021T-E/SN, MCP6291T-E/SN, and MCP6L91T-E/SN are available in Tape & Reel packaging suitable for automated assembly. MCP6291-E/SN is available in Tube packaging. All parts maintain the 8-SOIC footprint compatible with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can the MAX473CSA be directly replaced with any of the substitute parts?

A: Yes, all identified substitute parts are pin-compatible and functionally equivalent within the 8-SOIC package. Direct PCB footprint compatibility is maintained. However, electrical performance differences exist and must be evaluated for specific application requirements.

Q: What are the key electrical differences between the MAX473CSA and substitute parts?

A: The MAX473CSA features a higher slew rate (17 V/µs) compared to substitute parts (7 V/µs for Microchip parts, 7 V/µs for TLV2621IDR). The MAX473CSA also has higher input bias current (80 nA) compared to substitute parts (1-2 pA). Substitute parts offer lower supply current consumption (0.85-1 mA versus 2 mA) and improved input offset voltage specifications in most cases.

Q: Are all substitute parts RoHS compliant?

A: Yes, all substitute parts are ROHS3 compliant. The original MAX473CSA is RoHS non-compliant. This is a significant advantage for applications subject to RoHS regulations or customer requirements.

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

A: Both parts are electrically identical. The primary difference is packaging: MCP6291-E/SN is supplied in Tube packaging, while MCP6291T-E/SN is supplied in Tape & Reel (TR) packaging. Tape & Reel packaging is preferred for automated assembly processes.

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

A: The MCP6L91T-E/SN is optimized for low-power applications, consuming 850 µA compared to 1 mA for other Microchip parts. This makes it suitable for battery-powered or power-constrained designs while maintaining equivalent functional performance.

Q: Is TLV2621IDR a suitable long-term substitute?

A: TLV2621IDR is functionally equivalent but is in Last Time Buy status with limited inventory (1042 units). For new designs requiring long-term component availability, active Microchip parts (MCP6021T-E/SN, MCP6291T-E/SN, MCP6L91T-E/SN) are preferred.

Q: What is the operating temperature range difference?

A: The MAX473CSA operates from 0°C to 70°C. All substitute parts operate from -40°C to 125°C, providing extended temperature range capability suitable for industrial and automotive applications.

Q: Can I use these substitutes in existing designs without circuit modifications?

A: All substitute parts maintain the same 8-SOIC pinout and rail-to-rail output configuration. However, differences in slew rate, input bias current, and input offset voltage may affect circuit performance in precision applications. Circuit validation is recommended for applications with tight performance specifications.

Q: Which substitute offers the best input offset voltage specification?

A: TLV2621IDR offers the lowest input offset voltage at 250 µV, followed by MCP6021T-E/SN at 500 µV. MCP6L91T-E/SN offers 1 mV, and MCP6291 variants offer 3 mV. Selection depends on application precision requirements.

Q: Are all parts available in the same package dimensions?

A: Yes, all parts use the 8-SOIC package with 0.154" (3.90mm) width, ensuring identical PCB footprint compatibility and no layout modifications required.