MAX303CPE Equivalent & Substitute Parts

Part Overview

The MAX303CPE is a 2-circuit SPDT (Single Pole Double Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-DIP package. This component functions as a precision multiplexer/demultiplexer with 2:1 switching capability and 35Ohm on-state resistance, designed for signal routing and analog switching applications.

The MAX303CPE is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance of systems utilizing this component.

Substiute Parts

MAX303CPE

Analog Devices Inc./Maxim IntegratedIn Stock: 2273MAX303CPE Datasheet

Current PartRFQ

MAX303CPE+

Analog Devices Inc./Maxim IntegratedIn Stock: 1283MAX303CPE+ Datasheet

DirectRFQ

DG403DJ-E3

Vishay SiliconixIn Stock: 1730DG403DJ-E3 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MAX303CPE is determined by the following critical parameters:

Primary Substitution Criteria:

• Switch circuit topology (SPDT or equivalent)
• Multiplexer/demultiplexer configuration (2:1 or compatible)
• Number of circuits (2)
• On-state resistance compatibility (≤35Ohm or application-dependent tolerance)
• Supply voltage range overlap (single or dual supply)
• Package type (16-DIP through-hole)
• Switching speed (Ton/Toff ≤150ns/100ns)

Identified Substitutes:

MAX303CPE+ (Analog Devices Inc./Maxim Integrated) — Direct functional equivalent with identical electrical specifications. Differs only in packaging format (Tube) and product status (Active vs. Obsolete). All electrical parameters match exactly.

DG403DJ-E3 (Vishay Siliconix) — Cross-manufacturer substitute with functional compatibility. Maintains SPDT topology, 2-circuit configuration, and 16-DIP package. Notable parameter differences include higher on-state resistance (45Ohm vs. 35Ohm), different supply voltage ranges, and extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C).

Parameter Comparison

Engineering Selection Recommendations

MAX303CPE+ (Recommended Primary Substitute)

The MAX303CPE+ is the optimal substitute for the obsolete MAX303CPE. It provides identical electrical specifications and functional performance with no parameter deviations. Both components are manufactured by Analog Devices Inc./Maxim Integrated, ensuring design continuity and pinout compatibility. The MAX303CPE+ carries Active product status and ROHS3 compliance, addressing supply chain sustainability and regulatory requirements. This substitute requires no circuit redesign or performance re-evaluation.

DG403DJ-E3 (Alternative Cross-Manufacturer Substitute)

The DG403DJ-E3 from Vishay Siliconix serves as a functional alternative when MAX303CPE+ availability is constrained. This substitute maintains the 16-DIP package, SPDT topology, 2-circuit configuration, and critical switching parameters (Ton/Toff, charge injection, crosstalk). The DG403DJ-E3 exhibits higher on-state resistance (45Ohm vs. 35Ohm), which may impact signal integrity in low-impedance applications. The extended operating temperature range (-40°C ~ 85°C) provides broader environmental capability. The 1:1 multiplexer configuration differs from the 2:1 topology of the MAX303CPE, requiring circuit-level evaluation for compatibility. ROHS3 compliance and Active product status support long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can MAX303CPE+ be used as a direct drop-in replacement for MAX303CPE?

A: Yes. The MAX303CPE+ is electrically and functionally identical to the MAX303CPE with matching pinout, package, and all electrical specifications. No circuit modifications are required.

Q: What are the key differences between MAX303CPE and DG403DJ-E3?

A: The primary differences are on-state resistance (35Ohm vs. 45Ohm), supply voltage ranges, operating temperature range (-40°C ~ 85°C for DG403DJ-E3), and multiplexer configuration (1:1 vs. 2:1). The DG403DJ-E3 is suitable for applications where higher on-state resistance is acceptable and extended temperature operation is beneficial.

Q: Does the 45Ohm on-state resistance of DG403DJ-E3 affect circuit performance?

A: The 10Ohm increase in on-state resistance may impact applications sensitive to signal attenuation, impedance matching, or power dissipation. Circuit simulation or bench testing is necessary to determine suitability for specific applications.

Q: Are both substitutes available in the same packaging format?

A: Both MAX303CPE+ and DG403DJ-E3 are housed in 16-DIP (0.300", 7.62mm) through-hole packages with identical pinout compatibility. Packaging format (Tube) differs between suppliers but does not affect electrical function.

Q: What is the significance of the 2:1 vs. 1:1 multiplexer configuration difference?

A: The MAX303CPE operates as a 2:1 multiplexer (two input channels to one output), while the DG403DJ-E3 operates as a 1:1 configuration. This architectural difference requires evaluation of circuit topology to ensure functional compatibility.

Q: Do the substitutes meet current regulatory compliance standards?

A: Both MAX303CPE+ and DG403DJ-E3 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The original MAX303CPE is RoHS non-compliant and should be replaced in new designs or production requiring regulatory compliance.

Q: Which substitute should be selected for new designs?

A: MAX303CPE+ is the preferred choice for new designs due to identical specifications and Active product status. DG403DJ-E3 is suitable when MAX303CPE+ is unavailable, provided circuit-level compatibility is confirmed for the parameter differences noted.