MAX351EPE+ Equivalent & Substitute Parts

Part Overview

The MAX351EPE+ is a 4-circuit SPST-NC (Single Pole Single Throw - Normally Closed) IC switch manufactured by Analog Devices Inc./Maxim Integrated. This interface component features 35Ohm on-state resistance and operates across a wide supply voltage range (10V ~ 30V single supply or ±4.5V ~ 20V dual supply). The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. Substitute parts must maintain functional equivalence in switching topology, circuit count, on-state resistance, and package configuration while meeting current product availability and compliance requirements.

Key Parameters

Parameter	MAX351EPE+
Switch Circuit	SPST - NC
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	35Ohm
Channel-to-Channel Matching (ΔRon)	2Ohm (Max)
Voltage - Supply, Single (V+)	10V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	175ns, 145ns
Charge Injection	5pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF
Current - Leakage (IS(off)) (Max)	250pA
Crosstalk	-85dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MAX351EPE+ is determined by the following critical parameters:

Primary Substitution Criteria:

Switch topology: SPST - NC (Single Pole Single Throw - Normally Closed)
Circuit count: 4 independent circuits
Multiplexer configuration: 1:1
On-state resistance: 35Ohm maximum
Package: 16-DIP (0.300", 7.62mm) through-hole mounting
Operating temperature range: -40°C ~ 85°C

Secondary Compatibility Factors:

Supply voltage compatibility (single or dual supply operation)
Switch timing characteristics (Ton, Toff)
Leakage current and crosstalk performance
Charge injection specifications
Channel capacitance values

The substitute parts are grouped into two categories based on on-state resistance:

Category 1 - Direct Resistance Match (35Ohm): ADG411BNZ and DG411DJ-E3 maintain the exact 35Ohm on-state resistance specification, providing direct functional equivalence for applications requiring this specific resistance value.

Category 2 - Enhanced Performance (24Ohm): ADG431BNZ offers improved on-state resistance (24Ohm) with faster switching times (90ns, 60ns vs. 175ns, 145ns), suitable for applications where lower resistance and faster switching provide design advantages.

Parameter Comparison

Parameter	MAX351EPE+	ADG411BNZ	ADG431BNZ	DG411DJ-E3
Switch Circuit	SPST - NC	SPST - NC	SPST - NC	SPST - NC
Number of Circuits	4	4	4	4
Multiplexer/Demultiplexer Circuit	1:1	1:1	1:1	1:1
On-State Resistance (Max)	35Ohm	35Ohm	24Ohm	35Ohm
Voltage - Supply, Single (V+)	10V ~ 30V	12V	12V	5V ~ 44V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±15V	±15V	±5V ~ 20V
Switch Time (Ton, Toff) (Max)	175ns, 145ns	175ns, 145ns	90ns, 60ns	175ns, 145ns
Charge Injection	5pC	5pC	5pC	5pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF	9pF, 9pF	9pF, 9pF	9pF, 9pF
Current - Leakage (IS(off)) (Max)	250pA	250pA	250pA	250pA
Crosstalk	-85dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

ADG411BNZ (Analog Devices Inc.) - Primary Substitute

ADG411BNZ is the recommended primary substitute for MAX351EPE+ applications. This part maintains identical on-state resistance (35Ohm), switching time characteristics (175ns, 145ns), and all critical electrical parameters. The part is manufactured by Analog Devices Inc., the original MAX351 manufacturer, ensuring design continuity and process consistency. ADG411BNZ holds active product status with 2014 units in stock, providing reliable supply chain availability. Full ROHS3 compliance and REACH unaffected status confirm regulatory alignment with current environmental standards.

DG411DJ-E3 (Vishay Siliconix) - Alternative Substitute

DG411DJ-E3 provides functional equivalence with identical 35Ohm on-state resistance and switching characteristics. This Vishay Siliconix part offers extended single-supply voltage range (5V ~ 44V) compared to the original specification (10V ~ 30V), enabling broader application flexibility. The part maintains active product status with 2549 units available. ROHS3 compliance and REACH unaffected status confirm regulatory compliance. Selection of DG411DJ-E3 is appropriate when extended voltage range capability provides design advantages.

ADG431BNZ (Analog Devices Inc.) - Enhanced Performance Alternative

ADG431BNZ serves as an enhanced-performance alternative when improved switching speed and reduced on-state resistance are beneficial. This part reduces on-state resistance to 24Ohm and improves switching times to 90ns/60ns (compared to 175ns/145ns), delivering faster circuit response. Channel-to-Channel Matching (ΔRon) is specified at 1.2Ohm. ADG431BNZ maintains active product status with 1273 units in stock and full ROHS3 compliance. This substitute is appropriate for new designs where performance enhancement does not conflict with existing circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can ADG411BNZ directly replace MAX351EPE+ without circuit modifications?

A: ADG411BNZ maintains identical on-state resistance (35Ohm), switching times (175ns, 145ns), and all critical electrical parameters specified for MAX351EPE+. The 16-DIP package and through-hole mounting are identical. However, verify supply voltage compatibility with your circuit design. ADG411BNZ operates at 12V single supply or ±15V dual supply, whereas MAX351EPE+ operates at 10V ~ 30V single supply or ±4.5V ~ 20V dual supply. Confirm your application's voltage requirements before substitution.

Q: What is the difference between ADG411BNZ and ADG431BNZ?

A: Both parts are 4-circuit SPST-NC switches in 16-DIP packages. The primary difference is on-state resistance: ADG411BNZ maintains 35Ohm (matching MAX351EPE+), while ADG431BNZ reduces this to 24Ohm. ADG431BNZ also provides faster switching times (90ns/60ns vs. 175ns/145ns). Select ADG411BNZ for direct parameter matching; select ADG431BNZ when improved performance characteristics are acceptable and beneficial.

Q: Is DG411DJ-E3 compatible with all MAX351EPE+ applications?

A: DG411DJ-E3 maintains identical on-state resistance (35Ohm) and switching characteristics (175ns, 145ns). The 16-DIP through-hole package is identical. DG411DJ-E3 offers extended single-supply voltage range (5V ~ 44V) compared to MAX351EPE+ (10V ~ 30V). Verify that your circuit design accommodates the Vishay Siliconix manufacturing process and any potential differences in device behavior. All critical electrical parameters remain equivalent.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. ADG411BNZ, ADG431BNZ, and DG411DJ-E3 are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. This compliance status matches the original MAX351EPE+ specification.

Q: What is the operating temperature range for substitute parts?

A: All substitute parts (ADG411BNZ, ADG431BNZ, DG411DJ-E3) operate across the identical temperature range of -40°C ~ 85°C (TA), matching the MAX351EPE+ specification.

Q: Can I use ADG431BNZ in a design originally specified for MAX351EPE+?

A: ADG431BNZ can be used if your circuit design accommodates the improved electrical characteristics. The reduced on-state resistance (24Ohm vs. 35Ohm) and faster switching times (90ns/60ns vs. 175ns/145ns) may require circuit re-evaluation to confirm compatibility. The 16-DIP package and through-hole mounting are identical. Verify that lower resistance and faster switching do not introduce signal integrity or timing issues in your specific application.

Q: What inventory levels are available for each substitute part?

A: Current inventory levels are: ADG411BNZ (2014 units), ADG431BNZ (1273 units), and DG411DJ-E3 (2549 units). All parts are listed as new original stock. Verify current availability with your component supplier before finalizing procurement decisions.

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