MAX4256ESA Equivalent & Substitute Parts

Part Overview

The MAX4256ESA is a general-purpose operational amplifier manufactured by Analog Devices Inc./Maxim Integrated, designed for rail-to-rail push-pull output applications in 8-SOIC surface mount packaging. This device is classified as obsolete, making identification of equivalent and substitute parts essential for design continuity and procurement planning. The MAX4256ESA operates across a 2.4V to 5.5V supply range with a 22 MHz gain bandwidth product and 2.1V/µs slew rate, suitable for low-power analog signal conditioning applications.

Substiute Parts

MAX4256ESA

Analog Devices Inc./Maxim IntegratedIn Stock: 4651MAX4256ESA Datasheet

Current PartRFQ

MAX4256ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 2149MAX4256ESA+ Datasheet

DirectRFQ

MCP633-E/SN

Microchip TechnologyIn Stock: 1979MCP633-E/SN Datasheet

MFR RecommendedRFQ

MCP633T-E/SN

Microchip TechnologyIn Stock: 1151MCP633T-E/SN Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX4256ESA is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Package compatibility: 8-SOIC surface mount form factor (0.154", 3.90mm Width)
• Amplifier classification: General-purpose operational amplifier with single circuit
• Output configuration: Rail-to-rail capability
• Supply voltage range: Minimum 2.4V to maximum 5.5V overlap
• Operating temperature range: Minimum -40°C coverage
• Mounting type: Surface mount

Substitute parts are grouped into two categories:

1. Direct Manufacturer Equivalent (MAX4256ESA+): Identical electrical specifications and package, differing only in product status (Active vs. Obsolete) and RoHS compliance status.

2. Cross-Manufacturer Alternatives (MCP633-E/SN, MCP633T-E/SN): Microchip Technology MCP633 series devices that meet core package and supply voltage requirements while offering enhanced electrical performance characteristics and active product status.

Parameter Comparison

Engineering Selection Recommendations

MAX4256ESA+ (Direct Equivalent): The MAX4256ESA+ is the primary substitute for the obsolete MAX4256ESA. This part maintains identical electrical specifications and package configuration while offering active product status and ROHS3 compliance. Selection of MAX4256ESA+ is appropriate for applications requiring exact electrical performance matching and continued manufacturer support. Tube packaging is available for standard production quantities.

MCP633-E/SN and MCP633T-E/SN (Cross-Manufacturer Alternatives): The Microchip Technology MCP633 series (both tube and tape & reel packaging options) provides functional substitution with enhanced electrical performance. These devices deliver superior slew rate (10V/µs vs. 2.1V/µs), improved gain bandwidth product (24 MHz vs. 22 MHz), lower input offset voltage (1.8 mV vs. 70 µV), and reduced supply current (2.5 mA vs. 420 µA). Extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C) and active product status with ROHS3 compliance support long-term design continuity. MCP633-E/SN is packaged in tube format for standard procurement; MCP633T-E/SN is supplied in tape & reel format for automated assembly operations.

Compliance Considerations: All substitute parts listed maintain REACH Unaffected status and EAR99 export classification. For applications requiring RoHS compliance, MAX4256ESA+ and MCP633 series devices satisfy ROHS3 requirements, whereas the original MAX4256ESA does not.

Frequently Asked Questions (FAQ)

Q: Can MAX4256ESA+ be used as a direct replacement for MAX4256ESA?

A: Yes. MAX4256ESA+ is electrically and mechanically identical to MAX4256ESA, differing only in product status (Active vs. Obsolete) and RoHS compliance certification. Pin configuration, package dimensions, and all electrical specifications remain unchanged. Direct substitution is valid for all applications.

Q: What are the key differences between MAX4256ESA and MCP633-E/SN?

A: Both devices share identical 8-SOIC package geometry and overlapping supply voltage range (2.4V to 5.5V). MCP633-E/SN offers superior performance: 4.76× faster slew rate (10V/µs vs. 2.1V/µs), 2 MHz higher gain bandwidth product (24 MHz vs. 22 MHz), 25.7× lower input offset voltage (1.8 mV vs. 70 µV), and 168× lower supply current (2.5 mA vs. 420 µA). Operating temperature range extends to 125°C. These enhancements make MCP633-E/SN suitable for applications requiring higher speed, lower noise, or extended temperature operation.

Q: Are packaging differences between MCP633-E/SN and MCP633T-E/SN significant?

A: Packaging differences reflect procurement and assembly methodology only. MCP633-E/SN is supplied in tube packaging for manual or semi-automated handling. MCP633T-E/SN is supplied in tape & reel format optimized for high-speed automated pick-and-place assembly. Electrical specifications and package dimensions are identical. Selection depends on production volume and assembly equipment capability.

Q: What is the minimum supply voltage for each substitute part?

A: MAX4256ESA and MAX4256ESA+ operate at minimum 2.4V. MCP633-E/SN and MCP633T-E/SN require minimum 2.5V. Applications operating below 2.5V must use MAX4256ESA or MAX4256ESA+. Applications operating at 2.5V or higher support all listed substitutes.

Q: Do all substitute parts maintain the same output current capability?

A: No. MAX4256ESA specifies 68 mA output current per channel. MCP633 series specifications do not provide output current data in the supplied parameters. Applications requiring confirmed 68 mA output capability should verify MCP633 datasheet specifications before selection.

Q: Which substitute part is recommended for new designs?

A: For new designs, MCP633-E/SN or MCP633T-E/SN are recommended based on active product status, ROHS3 compliance, extended temperature range, and superior electrical performance. Selection between tube (MCP633-E/SN) and tape & reel (MCP633T-E/SN) depends on production volume and assembly process. For designs requiring exact electrical matching to legacy MAX4256ESA implementations, MAX4256ESA+ provides continuity while offering improved compliance status.

Q: Are all substitute parts available in the same quantity?

A: Inventory levels differ. MAX4256ESA has 4582 units in stock. MAX4256ESA+ has 2100 units. MCP633-E/SN has 1900 units. MCP633T-E/SN has 1046 units. Procurement planning should account for these inventory variations.