MAX391ESE Equivalent & Substitute Parts

Part Overview

The MAX391ESE is a 4-circuit SPST-NC (Single Pole Single Throw - Normally Closed) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated in a 16-SOIC surface mount package. This component functions as a precision electronic switch with 35Ohm on-state resistance and operates across supply voltages of 3V to 15V (single supply) or ±3V to ±8V (dual supply).

The MAX391ESE is classified as obsolete, with 5514 units currently in stock. Due to its discontinued status, identifying equivalent and substitute parts is essential for ongoing production support, design updates, and long-term component availability planning. Substitute parts must maintain functional compatibility across switching characteristics, package form factor, and electrical performance parameters.

Key Parameters

Parameter	MAX391ESE Value
Switch Circuit Type	SPST - NC
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	35Ohm
Channel-to-Channel Matching (ΔRon)	300mOhm
Voltage - Supply, Single (V+)	3V ~ 15V
Voltage - Supply, Dual (V±)	±3V ~ 8V
Switch Time (Ton, Toff) (Max)	130ns, 75ns
Charge Injection	2pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-85dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the MAX391ESE is determined by strict adherence to the following critical parameters:

Mandatory Compatibility Criteria:

Switch circuit type: SPST - NC (Single Pole Single Throw - Normally Closed)
Number of circuits: 4
Multiplexer/Demultiplexer circuit: 1:1
Package / Case: 16-SOIC (0.154", 3.90mm Width)
Mounting type: Surface Mount

Electrical Performance Parameters:

On-state resistance (maximum allowable)
Supply voltage ranges (single and/or dual supply capability)
Switch timing characteristics (Ton, Toff)
Charge injection
Channel capacitance
Leakage current
Crosstalk performance
Operating temperature range

Substitute parts are grouped based on their on-state resistance values and supply voltage compatibility. Parts with lower on-state resistance values (5.3Ohm to 70Ohm) provide improved signal integrity and reduced power dissipation compared to the original 35Ohm specification. Parts with higher supply voltage ratings (±15V dual supply) offer extended operational flexibility for applications requiring higher voltage switching.

Parameter Comparison

Parameter	MAX391ESE	MAX391ESE+	ADG1311YRZ	ADG441BRZ	ADG441BRZ-REEL	DG271BDY-E3	DG271BDY-T1-E3	DG454EY-T1-E3
Manufacturer	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices	Analog Devices	Analog Devices	Vishay Siliconix	Vishay Siliconix	Vishay Siliconix
Switch Circuit	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC
Number of Circuits	4	4	4	4	4	4	4	4
On-State Resistance (Max)	35Ohm	35Ohm	200Ohm	70Ohm	70Ohm	50Ohm	50Ohm	5.3Ohm
Channel-to-Channel Matching (ΔRon)	300mOhm	300mOhm	5Ohm	—	—	—	—	120mOhm
Voltage - Supply, Single (V+)	3V ~ 15V	3V ~ 15V	12V	12V	12V	—	—	12V ~ 36V
Voltage - Supply, Dual (V±)	±3V ~ 8V	±3V ~ 8V	±15V	±15V	±15V	±15V	±15V	±5V ~ 15V
Switch Time Ton (Max)	130ns	130ns	125ns	110ns	110ns	65ns	65ns	118ns
Switch Time Toff (Max)	75ns	75ns	50ns	60ns	60ns	65ns	65ns	97ns
Charge Injection	2pC	2pC	2pC	1pC	1pC	-5pC	-5pC	22pC
Channel Capacitance (CS(off), CD(off))	9pF, 9pF	9pF, 9pF	5pF, 5pF	4pF, 4pF	4pF, 4pF	8pF, 8pF	8pF, 8pF	31pF, 34pF
Current - Leakage (IS(off)) (Max)	100pA	100pA	10nA	500pA	500pA	1nA	1nA	500pA
Crosstalk	-85dB @ 1MHz	-85dB @ 1MHz	-90dB @ 1MHz	-100dB @ 1MHz	-100dB @ 1MHz	-100dB @ 100kHz	-100dB @ 100kHz	-85dB @ 1MHz
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 125°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	—	Tube	Tube	Tube	Cut Tape & Digi-Reel	Tube	Tape & Reel	Tape & Reel
Inventory Status	5514 Pcs	936 Pcs	3847 Pcs	13300 Pcs	5800 Pcs	1509 Pcs	665 Pcs	3342 Pcs

Engineering Selection Recommendations

Direct Replacement (Highest Compatibility):

MAX391ESE+ is the direct successor to the MAX391ESE, maintaining identical electrical specifications (35Ohm on-state resistance, 3V-15V single supply, ±3V-±8V dual supply) and package form factor. The primary distinction is product status: MAX391ESE+ is active and ROHS3 compliant, whereas the original MAX391ESE is obsolete and RoHS non-compliant. This part is the preferred choice for applications requiring exact electrical performance matching with modern compliance requirements.

Analog Devices Alternatives (Lower On-State Resistance):

ADG441BRZ and ADG441BRZ-REEL offer 70Ohm on-state resistance with improved crosstalk performance (-100dB @ 1MHz versus -85dB @ 1MHz). Both require ±15V dual supply operation and are not compatible with the original 3V-15V single supply range. These parts are suitable for applications where dual supply voltage is available and lower on-state resistance is beneficial.

ADG1311YRZ provides 200Ohm on-state resistance with extended operating temperature range (-40°C to 105°C) and improved crosstalk (-90dB @ 1MHz). This part requires ±15V dual supply and is not suitable for applications requiring the lower resistance characteristics of the MAX391ESE.

Vishay Siliconix Alternatives (Optimized Performance):

DG271BDY-E3 and DG271BDY-T1-E3 (identical electrical specifications, different packaging) offer 50Ohm on-state resistance with faster switching times (65ns Ton/Toff) and lower leakage current (1nA). These parts require ±15V dual supply only and are not compatible with single supply operation. Packaging differs: DG271BDY-E3 is supplied in tube format, while DG271BDY-T1-E3 is supplied in tape and reel format.

DG454EY-T1-E3 provides the lowest on-state resistance (5.3Ohm) with extended operating temperature range (-40°C to 125°C) and the widest supply voltage range (12V-36V single supply, ±5V-±15V dual supply). This part exhibits higher charge injection (22pC) and channel capacitance compared to the MAX391ESE, making it suitable for applications prioritizing low resistance and temperature performance over charge injection characteristics.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant and REACH unaffected, addressing regulatory requirements not met by the obsolete MAX391ESE. Selection should account for supply voltage availability in the target application, as several alternatives require ±15V dual supply operation not supported by the original design.

Frequently Asked Questions (FAQ)

Q: Can MAX391ESE+ be used as a direct replacement for MAX391ESE?

A: Yes. MAX391ESE+ maintains identical electrical specifications and 16-SOIC package form factor. The primary differences are product status (active versus obsolete) and RoHS compliance (ROHS3 compliant versus non-compliant). No circuit modifications are required.

Q: What is the key difference between ADG441BRZ and ADG441BRZ-REEL?

A: Both parts have identical electrical specifications and on-state resistance (70Ohm). The difference is packaging format: ADG441BRZ is supplied in tube packaging, while ADG441BRZ-REEL is supplied in cut tape and Digi-Reel format. Selection depends on assembly process requirements and volume handling.

Q: Why do some substitutes require ±15V dual supply when the MAX391ESE supports 3V-15V single supply?

A: Different IC switch architectures have different supply voltage requirements. ADG441BRZ, ADG1311YRZ, and DG271 series parts are optimized for ±15V dual supply operation and do not support single supply voltage ranges. Applications using these substitutes must provide dual supply voltage capability.

Q: Which substitute offers the best performance for low-resistance switching applications?

A: DG454EY-T1-E3 provides the lowest on-state resistance (5.3Ohm) with the widest supply voltage range (12V-36V single supply, ±5V-±15V dual supply). This part is suitable for applications prioritizing minimal signal attenuation and power dissipation. Note that charge injection is higher (22pC) compared to the MAX391ESE (2pC).

Q: Are all substitute parts available in 16-SOIC package?

A: Yes. All substitute parts listed are available in 16-SOIC (0.154", 3.90mm Width) surface mount package, maintaining mechanical compatibility with MAX391ESE PCB layouts.

Q: What is the significance of channel-to-channel matching (ΔRon)?

A: Channel-to-channel matching specifies the maximum resistance variation between the four switch circuits within a single IC. Lower values indicate better uniformity across channels. MAX391ESE specifies 300mOhm matching; DG454EY-T1-E3 specifies 120mOhm, indicating superior channel uniformity.

Q: Can DG271BDY-E3 and DG271BDY-T1-E3 be used interchangeably?

A: Yes, from an electrical and functional perspective. Both parts have identical specifications and 16-SOIC package. The only difference is packaging format (tube versus tape and reel), which affects handling and assembly processes but not electrical performance.

Q: What is charge injection and why does it matter?

A: Charge injection is the amount of charge transferred to the signal path when the switch transitions. Lower values reduce signal distortion in precision analog applications. MAX391ESE specifies 2pC; DG271 series specifies -5pC (negative injection); DG454EY-T1-E3 specifies 22pC (higher injection). Selection depends on application sensitivity to charge injection effects.

Q: Which substitute has the widest operating temperature range?

A: DG454EY-T1-E3 supports -40°C to 125°C, compared to MAX391ESE's -40°C to 85°C. This extended range is suitable for industrial and automotive applications requiring higher temperature operation.

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