MAX323C/D Equivalent & Substitute Parts

Part Overview

The MAX323C/D is a 2-circuit IC switch with SPST-NO (Single Pole Single Throw - Normally Open) configuration and 60Ohm on-state resistance, manufactured by Analog Devices Inc./Maxim Integrated. This die-format component is classified as obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications. The obsolete status necessitates sourcing alternative components that maintain electrical and mechanical compatibility with existing designs.

Substiute Parts

MAX323C/D

Analog Devices Inc./Maxim IntegratedIn Stock: 866MAX323C/D Datasheet

Current PartRFQ

MAX323ESA+

Analog Devices Inc./Maxim IntegratedIn Stock: 1928MAX323ESA+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX323C/D is determined by strict equivalence across the following critical parameters:

• Switch Circuit Configuration: SPST - NO topology must be maintained
• Number of Circuits: 2-circuit requirement
• On-State Resistance: 60Ohm maximum specification
• Multiplexer/Demultiplexer Circuit: 1:1 ratio
• Voltage Supply Range: 2.7V ~ 16V single supply compatibility
• Switch Timing: Ton (150ns max) and Toff (100ns max)
• Charge Injection: 1pC specification
• Channel Capacitance: 9pF for both CS(off) and CD(off)
• Leakage Current: 100pA maximum IS(off)
• Crosstalk Performance: -85dB @ 1MHz
• Base Product Number: MAX323 series

The MAX323ESA+ qualifies as a direct substitute based on identical electrical specifications across all critical parameters. The primary difference is packaging format: the substitute transitions from die format to 8-SOIC (0.154", 3.90mm Width) surface mount package, which represents an enhancement in handling and integration capability while maintaining full electrical equivalence.

Parameter Comparison

Engineering Selection Recommendations

The MAX323ESA+ is the manufacturer-recommended substitute for the obsolete MAX323C/D. Selection of this substitute is justified on the following engineering grounds:

Product Status Alignment: The MAX323ESA+ maintains active product status with Analog Devices Inc./Maxim Integrated, ensuring continued availability and technical support. This addresses the critical limitation of the obsolete MAX323C/D.

Electrical Equivalence: All electrical parameters are identical between the main part and substitute, including on-state resistance, switching times, charge injection, capacitance characteristics, leakage current, and crosstalk performance. This ensures direct functional compatibility in circuit applications.

Compliance Certification: Both components maintain ROHS3 compliance and identical moisture sensitivity ratings (MSL 1 - Unlimited), confirming environmental and regulatory compatibility.

Operating Temperature Enhancement: The MAX323ESA+ provides an extended operating temperature range (-40°C ~ 85°C) compared to the original part (0°C ~ 70°C), offering improved performance margin for applications across wider environmental conditions.

Packaging Transition: The shift from die format to 8-SOIC package represents a practical advantage for manufacturing and assembly, providing standard surface mount integration while maintaining all electrical specifications.

Frequently Asked Questions (FAQ)

Q: Can MAX323ESA+ directly replace MAX323C/D in existing designs?

A: Yes. The MAX323ESA+ provides complete electrical equivalence across all critical parameters: switch circuit configuration, on-state resistance, supply voltage range, switching times, charge injection, capacitance, leakage current, and crosstalk performance. The primary difference is packaging format (8-SOIC versus die), which requires PCB layout adjustment but does not affect electrical functionality.

Q: What is the significance of the package format change from die to 8-SOIC?

A: Die format components require specialized handling and integration into hybrid or multi-chip module assemblies. The 8-SOIC package provides a standard surface mount integrated circuit format suitable for conventional PCB assembly processes. This transition simplifies manufacturing while maintaining identical electrical performance.

Q: Are there compliance or certification differences between these parts?

A: No. Both components maintain ROHS3 compliance, identical moisture sensitivity levels (MSL 1 - Unlimited), and equivalent environmental certifications. The MAX323ESA+ additionally carries EAR99 ECCN classification versus the obsolete designation of the original part.

Q: Does the extended operating temperature range of MAX323ESA+ affect circuit design?

A: The extended range (-40°C ~ 85°C versus 0°C ~ 70°C) provides additional performance margin and does not require design modifications. Existing designs qualified for the original temperature range remain fully compatible.

Q: What inventory considerations apply to this substitution?

A: The MAX323ESA+ is available in active production with substantial inventory (1900 Pcs New Original In Stock), ensuring reliable long-term supply. The original MAX323C/D is obsolete with limited remaining inventory (844 Pcs), making transition to the substitute necessary for sustained production.