PS391ESEE Equivalent & Substitute Parts

Part Overview

The PS391ESEE is a 4-circuit IC switch manufactured by Diodes Incorporated, configured as a SPST-NC (Single Pole Single Throw - Normally Closed) multiplexer with 1:1 switching capability in a 16-SOIC package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design requirements and production continuity. The part operates across supply voltage ranges of 3V to 15V (single supply) or ±3V to ±8V (dual supply), with on-state resistance of 45Ohm maximum and switching times of 130ns (Ton) and 75ns (Toff).

Key Parameters

Parameter	PS391ESEE Value
Switch Circuit Configuration	SPST - NC
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	45Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm
Voltage - Supply, Single (V+)	3V ~ 15V
Voltage - Supply, Dual (V±)	±3V ~ 8V
Switch Time (Ton, Toff) (Max)	130ns, 75ns
-3dB Bandwidth	100MHz
Charge Injection	3pC
Channel Capacitance (CS(off), CD(off))	12pF, 12pF
Current - Leakage (IS(off)) (Max)	100pA
Crosstalk	-90dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	16-SOIC (0.295", 7.50mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the PS391ESEE is determined by the following critical parameters: switch circuit configuration (SPST-NC), number of circuits (4), multiplexer ratio (1:1), package type (16-SOIC), and electrical operating ranges (supply voltage and temperature). On-state resistance, switching time, and leakage current are secondary selection criteria that define performance tier compatibility.

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

Category A - Lower Resistance (35Ohm): MAX391CSE+, MAX391CSE+T, MAX391ESE+, MAX391ESE+T. These parts maintain identical switching architecture and supply voltage compatibility with the PS391ESEE while offering improved on-state resistance performance.

Category B - Moderate Resistance (50Ohm): DG271BDY-E3, DG271BDY-T1-E3. These Vishay Siliconix parts provide comparable resistance performance with dual supply operation (±15V) and enhanced crosstalk isolation.

Category C - Lower Resistance, Extended Temperature (5.3Ohm): DG454EY-T1-E3. This part offers significantly lower on-state resistance with extended operating temperature range (-40°C ~ 125°C) and higher supply voltage capability (12V ~ 36V single supply).

Category D - Higher Resistance (160Ohm): MAX4511CSE+, MAX4511CSE+T, MAX4511ESE+. These parts are suitable for applications where higher on-state resistance is acceptable in exchange for higher supply voltage operation (9V ~ 36V single supply).

Parameter Comparison

Part Number	Manufacturer	On-State Resistance (Max)	Supply Voltage Single (V+)	Supply Voltage Dual (V±)	Switch Time Ton/Toff (Max)	Operating Temperature	Package	Product Status	Packaging Type
PS391ESEE	Diodes Incorporated	45Ohm	3V ~ 15V	±3V ~ 8V	130ns, 75ns	-40°C ~ 85°C	16-SOIC	Obsolete	-
MAX391CSE+	Analog Devices Inc./Maxim Integrated	35Ohm	3V ~ 15V	±3V ~ 8V	130ns, 75ns	0°C ~ 70°C	16-SOIC	Active	Tube
MAX391CSE+T	Analog Devices Inc./Maxim Integrated	35Ohm	3V ~ 15V	±3V ~ 8V	130ns, 75ns	0°C ~ 70°C	16-SOIC	Active	Tape & Reel (TR)
MAX391ESE+	Analog Devices Inc./Maxim Integrated	35Ohm	3V ~ 15V	±3V ~ 8V	130ns, 75ns	-40°C ~ 85°C	16-SOIC	Active	Tube
MAX391ESE+T	Analog Devices Inc./Maxim Integrated	35Ohm	3V ~ 15V	±3V ~ 8V	130ns, 75ns	-40°C ~ 85°C	16-SOIC	Active	Tape & Reel (TR)
DG271BDY-E3	Vishay Siliconix	50Ohm	-	±15V	65ns, 65ns	-40°C ~ 85°C	16-SOIC	Active	Tube
DG271BDY-T1-E3	Vishay Siliconix	50Ohm	-	±15V	65ns, 65ns	-40°C ~ 85°C	16-SOIC	Active	Tape & Reel (TR)
DG454EY-T1-E3	Vishay Siliconix	5.3Ohm	12V ~ 36V	±5V ~ 15V	118ns, 97ns	-40°C ~ 125°C	16-SOIC	Active	Tape & Reel (TR)
MAX4511CSE+	Analog Devices Inc./Maxim Integrated	160Ohm	9V ~ 36V	±4.5V ~ 18V	500ns, 400ns	0°C ~ 70°C	16-SOIC	Active	Tube
MAX4511CSE+T	Analog Devices Inc./Maxim Integrated	160Ohm	9V ~ 36V	±4.5V ~ 18V	500ns, 400ns	0°C ~ 70°C	16-SOIC	Active	Tape & Reel (TR)
MAX4511ESE+	Analog Devices Inc./Maxim Integrated	160Ohm	9V ~ 36V	±4.5V ~ 18V	500ns, 400ns	-40°C ~ 85°C	16-SOIC	Active	Tube

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement):

MAX391ESE+ and MAX391ESE+T are the preferred direct substitutes for PS391ESEE. Both parts are manufactured by Analog Devices Inc./Maxim Integrated with active product status, maintain identical electrical specifications (35Ohm on-state resistance, 3V ~ 15V single supply, ±3V ~ 8V dual supply), and support the full operating temperature range (-40°C ~ 85°C) of the original part. Both are ROHS3 compliant with MSL 1 rating. The primary distinction is packaging: MAX391ESE+ is supplied in Tube format, while MAX391ESE+T is supplied in Tape & Reel (TR) format for automated assembly.

Secondary Substitutes (Performance-Equivalent with Constraints):

MAX391CSE+ and MAX391CSE+T offer lower on-state resistance (35Ohm) and identical switching characteristics but operate within a narrower temperature range (0°C ~ 70°C). These parts are suitable for applications not requiring the full -40°C to 85°C temperature range. Both are ROHS3 compliant with MSL 1 rating and active product status.

Alternative Substitutes (Different Electrical Characteristics):

DG271BDY-E3 and DG271BDY-T1-E3 (Vishay Siliconix) provide 50Ohm on-state resistance with faster switching times (65ns Ton/Toff) and operate on dual supply only (±15V). These parts are suitable for applications where single supply operation is not required and higher switching speed is beneficial. Both are ROHS3 compliant with MSL 1 rating and active product status.

DG454EY-T1-E3 (Vishay Siliconix) offers significantly lower on-state resistance (5.3Ohm) with extended operating temperature range (-40°C ~ 125°C) and higher supply voltage capability (12V ~ 36V single supply, ±5V ~ 15V dual supply). This part is suitable for high-current switching applications requiring lower resistance performance. ROHS3 compliant with MSL 1 rating and active product status.

MAX4511ESE+, MAX4511CSE+, and MAX4511CSE+T provide 160Ohm on-state resistance with higher supply voltage operation (9V ~ 36V single supply, ±4.5V ~ 18V dual supply). These parts are suitable for applications where higher supply voltages are required and higher on-state resistance is acceptable. MAX4511ESE+ supports full temperature range (-40°C ~ 85°C), while MAX4511CSE+ and MAX4511CSE+T are limited to 0°C ~ 70°C. All are ROHS3 compliant with MSL 1 rating and active product status.

Frequently Asked Questions (FAQ)

Q: Can MAX391ESE+ directly replace PS391ESEE without circuit modification?

A: MAX391ESE+ is electrically compatible with PS391ESEE across all specified parameters: identical on-state resistance (35Ohm is lower, providing improved performance), matching supply voltage ranges (3V ~ 15V single, ±3V ~ 8V dual), identical switching times (130ns Ton, 75ns Toff), and full operating temperature range (-40°C ~ 85°C). Both are 16-SOIC package, ROHS3 compliant, and MSL 1 rated. No circuit modification is required.

Q: What is the difference between MAX391ESE+ and MAX391ESE+T?

A: Both parts are electrically identical. The difference is packaging format: MAX391ESE+ is supplied in Tube format for manual handling and lower-volume applications, while MAX391ESE+T is supplied in Tape & Reel (TR) format for automated pick-and-place assembly and higher-volume production.

Q: Why would I select DG271BDY-E3 over MAX391ESE+?

A: DG271BDY-E3 is selected when dual supply operation (±15V) is required and single supply operation is not needed. It offers faster switching times (65ns vs. 130ns Ton) and lower leakage current (1nA vs. 100pA). However, it does not support single supply operation (3V ~ 15V) that PS391ESEE provides.

Q: Is DG454EY-T1-E3 a suitable substitute for PS391ESEE?

A: DG454EY-T1-E3 is functionally compatible as a 4-circuit SPST-NC switch in 16-SOIC package, but operates under different electrical constraints. It requires higher supply voltages (12V ~ 36V single supply vs. 3V ~ 15V for PS391ESEE) and offers significantly lower on-state resistance (5.3Ohm). It is suitable only for applications that can accommodate these higher voltage requirements and benefit from lower resistance performance.

Q: Can MAX4511ESE+ replace PS391ESEE?

A: MAX4511ESE+ is functionally compatible as a 4-circuit SPST-NC switch in 16-SOIC package with full temperature range support (-40°C ~ 85°C). However, it requires higher supply voltages (9V ~ 36V single supply vs. 3V ~ 15V for PS391ESEE) and has significantly higher on-state resistance (160Ohm vs. 45Ohm). It is suitable only for applications that operate at higher supply voltages and where higher on-state resistance is acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes, all substitute parts listed are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of PS391ESEE.

Q: What is the inventory status of substitute parts?

A: All substitute parts listed maintain active product status with current inventory availability: MAX391ESE+ (936 Pcs), MAX391ESE+T (789 Pcs), MAX391CSE+ (1286 Pcs), MAX391CSE+T (1054 Pcs), DG271BDY-E3 (1509 Pcs), DG271BDY-T1-E3 (665 Pcs), DG454EY-T1-E3 (3342 Pcs), MAX4511ESE+ (6370 Pcs), MAX4511CSE+ (909 Pcs), and MAX4511CSE+T (1055 Pcs).

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