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PS391ESEEX Equivalent & Substitute Parts
Part Overview
The PS391ESEEX is a 4-circuit SPST-NC analog switch IC manufactured by Diodes Incorporated, housed in a 16-SOIC package with 45Ohm on-state resistance. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The PS391ESEEX operates across dual supply voltages (±3V to ±8V) or single supply (3V to 15V) with switching times of 130ns (Ton) and 75ns (Toff), suitable for audio and signal routing applications requiring low on-state resistance and minimal crosstalk.
Substiute Parts
Key Parameters
| Parameter | PS391ESEEX |
|---|---|
| Manufacturer | Diodes Incorporated |
| Switch Circuit | SPST - NC |
| Number of Circuits | 4 |
| 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 PS391ESEEX is determined by the following critical parameters:
- Switch topology: SPST-NC (Single Pole Single Throw - Normally Closed) with 4 circuits
- On-state resistance range: 35Ohm to 50Ohm represents the closest electrical match; parts with significantly higher resistance (135Ohm, 160Ohm) or lower resistance (5.3Ohm) serve different application requirements
- Supply voltage compatibility: Dual supply (±3V to ±8V) or single supply (3V to 15V) operation
- Package type: 16-SOIC form factor with surface mount capability
- Switching performance: Ton/Toff specifications and bandwidth requirements
- Compliance: ROHS3 compliance and MSL rating
Substitute parts are grouped into three categories based on on-state resistance characteristics:
Category A (35Ohm - 50Ohm): Direct electrical equivalents with minimal performance deviation
- MAX391CSE+, MAX391CSE+T, MAX391ESE+, MAX391ESE+T (35Ohm)
- DG271BDY-E3, DG271BDY-T1-E3 (50Ohm)
Category B (Higher Resistance): Suitable for applications tolerating increased on-state resistance
- ALD4211SCL (135Ohm)
- MAX4511CSE+, MAX4511CSE+T (160Ohm)
Category C (Lower Resistance): For applications requiring minimal on-state resistance
- DG454EY-T1-E3 (5.3Ohm)
Parameter Comparison
| Part Number | Manufacturer | On-State Resistance (Max) | Voltage - Supply, Dual (V±) | Switch Time Ton/Toff (Max) | Charge Injection | Channel Capacitance (CS/CD) | Current - Leakage (Max) | Crosstalk | Operating Temperature | Package / Case | Product Status | Packaging |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PS391ESEEX | Diodes Incorporated | 45Ohm | ±3V ~ 8V | 130ns, 75ns | 3pC | 12pF, 12pF | 100pA | -90dB @ 1MHz | -40°C ~ 85°C | 16-SOIC (0.295", 7.50mm) | Obsolete | - |
| MAX391ESE+ | Analog Devices Inc./Maxim Integrated | 35Ohm | ±3V ~ 8V | 130ns, 75ns | 2pC | 9pF, 9pF | 100pA | -85dB @ 1MHz | -40°C ~ 85°C | 16-SOIC (0.154", 3.90mm) | Active | Tube |
| MAX391ESE+T | Analog Devices Inc./Maxim Integrated | 35Ohm | ±3V ~ 8V | 130ns, 75ns | 2pC | 9pF, 9pF | 100pA | -85dB @ 1MHz | -40°C ~ 85°C | 16-SOIC (0.154", 3.90mm) | Active | Tape & Reel (TR) |
| MAX391CSE+ | Analog Devices Inc./Maxim Integrated | 35Ohm | ±3V ~ 8V | 130ns, 75ns | 2pC | 9pF, 9pF | 100pA | -85dB @ 1MHz | 0°C ~ 70°C | 16-SOIC (0.154", 3.90mm) | Active | Tube |
| MAX391CSE+T | Analog Devices Inc./Maxim Integrated | 35Ohm | ±3V ~ 8V | 130ns, 75ns | 2pC | 9pF, 9pF | 100pA | -85dB @ 1MHz | 0°C ~ 70°C | 16-SOIC (0.154", 3.90mm) | Active | Tape & Reel (TR) |
| DG271BDY-E3 | Vishay Siliconix | 50Ohm | ±15V | 65ns, 65ns | -5pC | 8pF, 8pF | 1nA | -100dB @ 100kHz | -40°C ~ 85°C | 16-SOIC (0.154", 3.90mm) | Active | Tube |
| DG271BDY-T1-E3 | Vishay Siliconix | 50Ohm | ±15V | 65ns, 65ns | -5pC | 8pF, 8pF | 1nA | -100dB @ 100kHz | -40°C ~ 85°C | 16-SOIC (0.154", 3.90mm) | Active | Tape & Reel (TR) |
| ALD4211SCL | Advanced Linear Devices Inc. | 135Ohm | ±1.5V ~ 6V | 130ns, 130ns | 0.2pC | 3pF, 3pF | 100pA | -90dB @ 100kHz | -40°C ~ 85°C | 16-SOIC (0.154", 3.90mm) | Active | Tube |
| DG454EY-T1-E3 | Vishay Siliconix | 5.3Ohm | ±5V ~ 15V | 118ns, 97ns | 22pC | 31pF, 34pF | 500pA | -85dB @ 1MHz | -40°C ~ 125°C | 16-SOIC (0.154", 3.90mm) | Active | Tape & Reel (TR) |
| MAX4511CSE+ | Analog Devices Inc./Maxim Integrated | 160Ohm | ±4.5V ~ 18V | 500ns, 400ns | 1.5pC | 10pF, 5pF | 500pA | -66dB @ 1MHz | 0°C ~ 70°C | 16-SOIC (0.154", 3.90mm) | Active | Tube |
| MAX4511CSE+T | Analog Devices Inc./Maxim Integrated | 160Ohm | ±4.5V ~ 18V | 500ns, 400ns | 1.5pC | 10pF, 5pF | 500pA | -66dB @ 1MHz | 0°C ~ 70°C | 16-SOIC (0.154", 3.90mm) | Active | Tape & Reel (TR) |
Engineering Selection Recommendations
Primary Substitutes (Category A - 35Ohm to 50Ohm)
The MAX391ESE+ and MAX391ESE+T series represent the closest electrical equivalents to the PS391ESEEX. Both parts maintain identical supply voltage ranges (±3V to ±8V), switching times (130ns/75ns), and leakage current specifications (100pA). The MAX391ESE+ variants offer extended operating temperature range (-40°C to 85°C) matching the original part, while MAX391CSE+ variants operate within 0°C to 70°C. All MAX391 variants are ROHS3 compliant with MSL 1 rating. The primary difference is package width (0.154" vs. 0.295"), which requires PCB layout verification.
The DG271BDY-E3 and DG271BDY-T1-E3 from Vishay Siliconix provide 50Ohm on-state resistance with superior crosstalk performance (-100dB @ 100kHz) and faster switching times (65ns). However, these parts require dual supply operation at ±15V, limiting compatibility to applications with higher supply voltages. Both are ROHS3 compliant with MSL 1 rating and active product status.
Secondary Substitutes (Category B - Higher Resistance)
The ALD4211SCL (135Ohm) and MAX4511CSE+/MAX4511CSE+T (160Ohm) are suitable only for applications where on-state resistance is not a critical parameter. The ALD4211SCL operates at lower supply voltages (±1.5V to ±6V) and exhibits minimal charge injection (0.2pC). The MAX4511 series requires higher supply voltages (±4.5V to ±18V) and exhibits significantly slower switching times (500ns/400ns), making these parts unsuitable for high-speed signal routing applications.
Tertiary Substitute (Category C - Lower Resistance)
The DG454EY-T1-E3 (5.3Ohm) is appropriate only for applications requiring minimal on-state resistance. This part operates across extended temperature range (-40°C to 125°C) but exhibits higher charge injection (22pC) and channel capacitance (31pF/34pF), unsuitable for audio applications or precision signal routing.
Compliance and Certification
All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original PS391ESEEX specifications. All parts carry EAR99 ECCN classification and HTSUS code 8542.39.0001.
Frequently Asked Questions (FAQ)
Q: Can MAX391CSE+ replace PS391ESEEX in all applications?
A: MAX391CSE+ is electrically compatible with PS391ESEEX for supply voltage and switching characteristics. However, the operating temperature range differs: MAX391CSE+ operates 0°C to 70°C versus PS391ESEEX at -40°C to 85°C. Verify your application's temperature requirements before substitution. Additionally, the package width differs (0.154" vs. 0.295"), requiring PCB layout confirmation.
Q: What is the difference between MAX391ESE+ and MAX391CSE+?
A: Both parts share identical electrical specifications (35Ohm on-state resistance, 130ns/75ns switching times, ±3V to ±8V supply). The primary difference is operating temperature range: MAX391ESE+ operates -40°C to 85°C (matching PS391ESEEX), while MAX391CSE+ operates 0°C to 70°C. Select MAX391ESE+ for extended temperature applications.
Q: Why do DG271 parts require ±15V supply while PS391ESEEX operates at ±3V to ±8V?
A: DG271 parts are designed for higher voltage applications and do not support the lower supply voltage range of PS391ESEEX. Substitution is only valid if your application can accommodate ±15V dual supply operation.
Q: Can I use DG454EY-T1-E3 as a direct replacement?
A: DG454EY-T1-E3 is not a direct replacement. While it provides superior on-state resistance (5.3Ohm), it exhibits significantly higher charge injection (22pC vs. 3pC) and channel capacitance (31pF/34pF vs. 12pF), making it unsuitable for audio signal routing. Use DG454EY-T1-E3 only in applications where minimal on-state resistance is the primary requirement.
Q: What packaging options are available?
A: Substitute parts are available in two packaging formats: Tube (standard packaging) and Tape & Reel (TR) for automated assembly. Select based on your procurement and assembly requirements. Both formats are ROHS3 compliant with identical electrical specifications.
Q: Are all substitute parts currently in active production?
A: Yes, all listed substitute parts carry Active product status. The original PS391ESEEX is classified as Obsolete, making active substitutes necessary for new designs and ongoing procurement.
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