MAX303CSE Equivalent & Substitute Parts

Part Overview

The MAX303CSE is a 2-circuit SPDT (Single Pole Double Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-SOIC surface mount package. This component functions as a 2:1 multiplexer/demultiplexer with 35Ohm on-state resistance, designed for signal routing and switching applications in analog systems.

The MAX303CSE is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance of systems utilizing this component.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SPDT
Multiplexer/Demultiplexer Circuit	2:1
Number of Circuits	2
On-State Resistance (Max)	35Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm
Voltage - Supply, Single (V+)	10V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	150ns, 100ns
Charge Injection	10pC
Channel Capacitance (CS(off), CD(off))	12pF, 12pF
Current - Leakage (IS(off)) (Max)	500pA
Crosstalk	-90dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MAX303CSE is determined by the following critical parameters:

Mandatory Compatibility Parameters:

Switch Circuit: SPDT
Multiplexer/Demultiplexer Circuit: 2:1
Number of Circuits: 2
Package / Case: 16-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount

Allowable Variation Parameters:

On-State Resistance (Max): Substitute must not exceed the original specification or must be functionally equivalent within system tolerance
Channel-to-Channel Matching (ΔRon): Variation acceptable if system design permits
Voltage Supply Ranges: Substitute must support the required operating voltage range
Switch Time: Substitute must meet or exceed speed requirements
Charge Injection: Variation acceptable within system specifications
Operating Temperature: Substitute must cover the required temperature range
RoHS and MSL Status: Variation acceptable based on application requirements

The substitute parts identified below maintain identical switch topology, circuit count, and package form factor, ensuring direct pin-compatible replacement capability.

Parameter Comparison

Parameter	MAX303CSE (Main)	MAX303CSE+ (Direct)	DG403DYZ (Renesas)	DG403DYZ-T (Renesas)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Renesas Electronics Corporation	Renesas Electronics Corporation
Product Status	Obsolete	Active	Active	Active
Switch Circuit	SPDT	SPDT	SPDT	SPDT
Multiplexer/Demultiplexer Circuit	2:1	2:1	2:1	2:1
Number of Circuits	2	2	2	2
On-State Resistance (Max)	35Ohm	35Ohm	45Ohm	45Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm	500mOhm	3Ohm	3Ohm
Voltage - Supply, Single (V+)	10V ~ 30V	10V ~ 30V	5V ~ 34V	5V ~ 34V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±4.5V ~ 20V	±5V ~ 17V	±5V ~ 17V
Switch Time (Ton, Toff) (Max)	150ns, 100ns	150ns, 100ns	150ns, 100ns	150ns, 100ns
Charge Injection	10pC	10pC	60pC	60pC
Channel Capacitance (CS(off), CD(off))	12pF, 12pF	12pF, 12pF	12pF, 12pF	12pF, 12pF
Current - Leakage (IS(off)) (Max)	500pA	500pA	500pA	500pA
Crosstalk	-90dB @ 1MHz	-90dB @ 1MHz	-90dB @ 1MHz	-90dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)
Packaging	Not specified	Tube	Tube	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

MAX303CSE+ (Direct Substitute - Recommended for RoHS Compliance)

The MAX303CSE+ is the active production equivalent of the MAX303CSE, manufactured by the same supplier (Analog Devices Inc./Maxim Integrated). This part maintains identical electrical specifications including on-state resistance, switching characteristics, and supply voltage ranges. The primary distinction is product status (active vs. obsolete) and RoHS compliance (ROHS3 Compliant vs. non-compliant). The MAX303CSE+ is the preferred choice for new designs or systems requiring RoHS3 compliance. Packaging is supplied in Tube format.

DG403DYZ and DG403DYZ-T (Cross-Manufacturer Substitutes - Renesas Electronics)

The DG403DYZ and DG403DYZ-T are functionally equivalent SPDT 2:1 multiplexer switches manufactured by Renesas Electronics Corporation. Both parts maintain identical switch topology, circuit count, and 16-SOIC package form factor. Key differences from the MAX303CSE include:

On-State Resistance: 45Ohm (vs. 35Ohm original) — acceptable for applications where the higher resistance does not exceed system impedance requirements
Channel-to-Channel Matching: 3Ohm (vs. 500mOhm original) — variation acceptable within system design tolerances
Voltage Supply Range: 5V ~ 34V single supply (vs. 10V ~ 30V original) — broader lower voltage capability
Operating Temperature: -40°C ~ 85°C (vs. 0°C ~ 70°C original) — extended temperature range
Charge Injection: 60pC (vs. 10pC original) — higher charge injection acceptable for non-precision applications
RoHS Status: ROHS3 Compliant
Moisture Sensitivity: MSL 3 (168 Hours) — requires controlled storage conditions

The DG403DYZ is supplied in Tube packaging; the DG403DYZ-T is supplied in Cut Tape (CT) & Digi-Reel® format. Both are active products with established supply availability.

Frequently Asked Questions (FAQ)

Q: Can the MAX303CSE+ be used as a direct replacement for the MAX303CSE?

A: Yes. The MAX303CSE+ is electrically and mechanically identical to the MAX303CSE. Both parts feature identical on-state resistance (35Ohm), switching times (150ns/100ns), supply voltage ranges, and 16-SOIC package dimensions. The primary difference is product status and RoHS compliance. The MAX303CSE+ is the recommended substitute for ongoing production.

Q: What are the key differences between the Analog Devices MAX303CSE+ and the Renesas DG403DYZ?

A: Both parts are pin-compatible SPDT 2:1 multiplexer switches in 16-SOIC packages. The MAX303CSE+ has lower on-state resistance (35Ohm vs. 45Ohm) and lower charge injection (10pC vs. 60pC). The DG403DYZ offers a broader supply voltage range (5V ~ 34V vs. 10V ~ 30V) and extended operating temperature range (-40°C ~ 85°C vs. 0°C ~ 70°C). Selection depends on whether the application requires the lower resistance and charge injection characteristics of the MAX303CSE+ or the broader operating ranges of the DG403DYZ.

Q: Are the DG403DYZ and DG403DYZ-T electrically identical?

A: Yes. The DG403DYZ and DG403DYZ-T are electrically identical. The difference is packaging format: DG403DYZ is supplied in Tube; DG403DYZ-T is supplied in Cut Tape (CT) & Digi-Reel® format. Selection depends on assembly process requirements and tape-and-reel compatibility.

Q: What is the impact of the higher on-state resistance (45Ohm) in the DG403DYZ compared to the MAX303CSE (35Ohm)?

A: The 10Ohm difference in on-state resistance affects signal attenuation and power dissipation in the switch path. For applications with high-impedance signal sources or where minimal signal loss is critical, the MAX303CSE+ (35Ohm) is preferred. For applications with lower impedance sources or where the additional resistance is within system tolerance, the DG403DYZ is acceptable.

Q: What is the significance of the Moisture Sensitivity Level (MSL) difference?

A: The MAX303CSE and MAX303CSE+ have MSL 1 (Unlimited), meaning no moisture sensitivity restrictions. The DG403DYZ and DG403DYZ-T have MSL 3 (168 Hours), requiring controlled storage conditions and bake-out procedures before reflow soldering if the component has been exposed to ambient humidity for extended periods. This affects handling, storage, and assembly processes.

Q: Can the MAX303CSE be used in applications requiring RoHS compliance?

A: No. The MAX303CSE is RoHS non-compliant. For RoHS-compliant designs, use the MAX303CSE+ (ROHS3 Compliant) or the DG403DYZ/DG403DYZ-T (ROHS3 Compliant).

Q: What is the operating temperature range difference, and when does it matter?

A: The MAX303CSE operates from 0°C ~ 70°C; the DG403DYZ operates from -40°C ~ 85°C. For applications requiring extended temperature operation below 0°C or above 70°C, the DG403DYZ is necessary. For standard industrial or consumer applications within 0°C ~ 70°C, both parts are suitable.

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