MAX397C/D Equivalent & Substitute Parts

Part Overview

The MAX397C/D is a dual 8:1 multiplexer/demultiplexer IC with 100Ohm on-state resistance, manufactured by Analog Devices Inc./Maxim Integrated. This component is classified as an Interface category switch circuit device supplied in die form. The MAX397C/D is currently listed as obsolete, making identification of compatible substitute parts essential for ongoing system support and new design implementations where die-form packaging is not feasible or preferred.

Substiute Parts

MAX397C/D

Analog Devices Inc./Maxim IntegratedIn Stock: 928MAX397C/D Datasheet

Current PartRFQ

MAX397EWI+

Analog Devices Inc./Maxim IntegratedIn Stock: 1102MAX397EWI+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MAX397C/D is determined by strict equivalence across the following electrical and mechanical parameters:

• Circuit Configuration: Dual 8:1 multiplexer/demultiplexer topology
• On-State Resistance: 100Ohm maximum specification
• Supply Voltage Ranges: Single supply 2.7V ~ 16V and dual supply ±2.7V ~ 8V
• Switching Performance: 150ns maximum switching time (Ton, Toff)
• Signal Integrity: Charge injection of 2pC and crosstalk of -92dB @ 100kHz
• Leakage Current: 100pA maximum off-state leakage
• Compliance: ROHS3 compliance and MSL Level 1 rating

The MAX397EWI+ is identified as the manufacturer-recommended substitute. This part maintains electrical equivalence across all critical parameters while providing an alternative packaging format (28-SOIC) suitable for standard PCB assembly processes.

Parameter Comparison

Engineering Selection Recommendations

The MAX397EWI+ is the appropriate substitute for the obsolete MAX397C/D based on the following criteria:

Electrical Equivalence: All critical electrical parameters are identical, including on-state resistance, supply voltage ranges, switching time, charge injection, leakage current, and crosstalk performance. This ensures functional compatibility in existing circuit designs.

Product Status: The MAX397EWI+ maintains active product status with current manufacturing support, addressing the obsolescence of the original MAX397C/D die form.

Compliance and Certifications: Both parts maintain ROHS3 compliance and MSL Level 1 rating, ensuring consistency with regulatory and environmental requirements.

Packaging Consideration: The transition from die form (MAX397C/D) to 28-SOIC surface mount package (MAX397EWI+) requires PCB layout modification and assembly process adjustment. The 28-SOIC package is standard for high-volume PCB assembly and provides improved handling and reliability compared to bare die implementation.

Operating Temperature Range: The MAX397EWI+ extends the operating temperature range to -40°C ~ 85°C, providing broader environmental compatibility compared to the original 0°C ~ 70°C specification.

Frequently Asked Questions (FAQ)

Q: Can the MAX397EWI+ directly replace the MAX397C/D in existing designs?

A: Electrical substitution is direct due to parameter equivalence. However, physical implementation differs: the MAX397C/D is supplied as bare die requiring hybrid assembly, while the MAX397EWI+ is a 28-SOIC surface mount package. PCB layout and assembly process modifications are required.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution is based on: dual 8:1 multiplexer/demultiplexer configuration, 100Ohm on-state resistance, 2.7V ~ 16V single supply and ±2.7V ~ 8V dual supply capability, 150ns switching time, 2pC charge injection, and -92dB crosstalk at 100kHz. All these parameters must match for functional equivalence.

Q: Does the MAX397EWI+ offer any performance advantages?

A: The MAX397EWI+ maintains identical electrical performance while providing an extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) and active product status with ongoing manufacturing support.

Q: Are there packaging considerations for the substitution?

A: Yes. The MAX397C/D die form requires hybrid or flip-chip assembly techniques. The MAX397EWI+ 28-SOIC package is compatible with standard surface mount assembly processes, offering improved manufacturability and supply chain accessibility.

Q: What compliance certifications apply to both parts?

A: Both the MAX397C/D and MAX397EWI+ are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring regulatory consistency across substitution.