PS391EEE Equivalent & Substitute Parts

Part Overview

The PS391EEE is a 4-circuit SPST-NC IC switch manufactured by Diodes Incorporated, designed for low-impedance analog signal switching applications. This part operates across single supply (3V to 15V) and dual supply (±3V to ±8V) configurations with 45Ohm on-state resistance and 100MHz bandwidth capability. The PS391EEE is classified as obsolete, necessitating identification of functionally equivalent active alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	PS391EEE
Manufacturer	Diodes Incorporated
Switch Circuit Type	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-SSOP (0.154", 3.90mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PS391EEE is determined by the following critical parameters:

Circuit Configuration: SPST-NC topology with 4 independent circuits in 1:1 multiplexer configuration
Package Compatibility: 16-pin surface mount package (SSOP/TSSOP family)
Supply Voltage Range: Single supply 3V minimum and dual supply ±3V minimum capability
On-State Resistance: Maximum 45Ohm specification
Operating Temperature: Minimum -40°C to 85°C range
Electrical Performance: Switching speed, bandwidth, and leakage current characteristics

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

Low-Resistance Substitutes (1.1Ohm): ADG1611BRUZ, ADG1611BRUZ-REEL, ADG1611BRUZ-REEL7 — superior performance with lower impedance and improved matching
Mid-Resistance Substitute (5.3Ohm): DG454EQ-T1-E3 — moderate impedance with higher supply voltage capability
Matched-Impedance Substitutes (25Ohm): MAX4711EUE+, MAX4711EUE+T — closest electrical match to PS391EEE on-state resistance

Parameter Comparison

Parameter	PS391EEE	ADG1611BRUZ	ADG1611BRUZ-REEL	ADG1611BRUZ-REEL7	DG454EQ-T1-E3	MAX4711EUE+	MAX4711EUE+T
Manufacturer	Diodes Inc.	Analog Devices	Analog Devices	Analog Devices	Vishay Siliconix	Analog Devices/Maxim	Analog Devices/Maxim
Switch Circuit	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC
Number of Circuits	4	4	4	4	4	4	4
On-State Resistance (Max)	45Ohm	1.1Ohm	1.1Ohm	1.1Ohm	5.3Ohm	25Ohm	25Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm	30mOhm	30mOhm	30mOhm	120mOhm	200mOhm	200mOhm
Voltage - Supply, Single (V+)	3V ~ 15V	3.3V ~ 16V	3.3V ~ 16V	3.3V ~ 16V	12V ~ 36V	2.7V ~ 11V	2.7V ~ 11V
Voltage - Supply, Dual (V±)	±3V ~ 8V	±3.3V ~ 8V	±3.3V ~ 8V	±3.3V ~ 8V	±5V ~ 15V	±2.7V ~ 5.5V	±2.7V ~ 5.5V
Switch Time (Ton, Toff) (Max)	130ns, 75ns	156ns, 87ns	156ns, 87ns	156ns, 87ns	118ns, 97ns	125ns, 80ns	125ns, 80ns
-3dB Bandwidth	100MHz	38MHz	38MHz	38MHz	Not Specified	Not Specified	Not Specified
Charge Injection	3pC	170pC	170pC	170pC	22pC	25pC	25pC
Channel Capacitance (CS(off), CD(off))	12pF, 12pF	60pF, 60pF	60pF, 60pF	60pF, 60pF	31pF, 34pF	8pF, 8pF	8pF, 8pF
Current - Leakage (IS(off)) (Max)	100pA	300pA	300pA	300pA	500pA	500pA	500pA
Crosstalk	-90dB @ 1MHz	-110dB @ 1MHz	-110dB @ 1MHz	-110dB @ 1MHz	-85dB @ 1MHz	-87dB @ 1MHz	-87dB @ 1MHz
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	16-SSOP (3.90mm)	16-TSSOP (4.40mm)	16-TSSOP (4.40mm)	16-TSSOP (4.40mm)	16-TSSOP (4.40mm)	16-TSSOP (4.40mm)	16-TSSOP (4.40mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

ADG1611BRUZ / ADG1611BRUZ-REEL / ADG1611BRUZ-REEL7 — These Analog Devices parts are recommended as primary substitutes for applications where lower on-state resistance (1.1Ohm) provides performance improvement over the PS391EEE. All three variants share identical electrical specifications and differ only in packaging format (Tube, Cut Tape & Digi-Reel, or Cut Tape & Digi-Reel variant). These parts maintain ROHS3 compliance, MSL 1 rating, and extend operating temperature to 125°C. The 16-TSSOP package (4.40mm width) requires PCB layout verification against the original 16-SSOP (3.90mm width) footprint.

DG454EQ-T1-E3 — This Vishay Siliconix substitute operates at higher supply voltages (12V to 36V single supply, ±5V to ±15V dual supply) with moderate on-state resistance (5.3Ohm). Selection is appropriate for applications requiring extended supply voltage range. Operating temperature extends to 125°C. Package compatibility requires verification due to TSSOP format.

MAX4711EUE+ / MAX4711EUE+T — These Analog Devices/Maxim Integrated parts provide the closest on-state resistance match (25Ohm) to the PS391EEE and maintain identical operating temperature range (-40°C to 85°C). The MAX4711EUE+ is supplied in Tube packaging, while MAX4711EUE+T is supplied in Tape & Reel format. Both maintain ROHS3 compliance and MSL 1 rating. Supply voltage range is more restricted (2.7V to 11V single supply, ±2.7V to ±5.5V dual supply) compared to the PS391EEE.

All substitute parts maintain ROHS3 compliance, MSL 1 (Unlimited) moisture sensitivity rating, and EAR99 export classification consistent with the PS391EEE.

Frequently Asked Questions (FAQ)

Q: Can ADG1611BRUZ variants be used as direct drop-in replacements for PS391EEE?

A: ADG1611BRUZ, ADG1611BRUZ-REEL, and ADG1611BRUZ-REEL7 are electrically compatible substitutes with superior performance characteristics (1.1Ohm vs. 45Ohm on-state resistance). However, the package footprint differs: 16-TSSOP (4.40mm width) versus 16-SSOP (3.90mm width). PCB layout and land pattern verification is required before implementation.

Q: What is the difference between ADG1611BRUZ, ADG1611BRUZ-REEL, and ADG1611BRUZ-REEL7?

A: All three variants are electrically identical with the same electrical specifications. The differences are packaging and supply format: ADG1611BRUZ is supplied in Tube packaging, ADG1611BRUZ-REEL is supplied in Cut Tape & Digi-Reel format, and ADG1611BRUZ-REEL7 is supplied in Cut Tape & Digi-Reel variant packaging. Selection depends on manufacturing assembly requirements and inventory management.

Q: Why does DG454EQ-T1-E3 have a different supply voltage range?

A: DG454EQ-T1-E3 is designed for higher-voltage applications with single supply range of 12V to 36V and dual supply range of ±5V to ±15V. This part is suitable only for applications operating within these voltage specifications. The PS391EEE operates at lower supply voltages (3V to 15V single supply), making DG454EQ-T1-E3 incompatible for low-voltage designs.

Q: Is MAX4711EUE+ suitable for all PS391EEE applications?

A: MAX4711EUE+ and MAX4711EUE+T provide on-state resistance (25Ohm) closer to the PS391EEE (45Ohm) than the ADG1611 variants. However, the supply voltage range is more restricted (2.7V to 11V single supply, ±2.7V to ±5.5V dual supply). Verify that your application operates within these voltage limits before selection.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (ADG1611BRUZ, ADG1611BRUZ-REEL, ADG1611BRUZ-REEL7, DG454EQ-T1-E3, MAX4711EUE+, MAX4711EUE+T) maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, consistent with the PS391EEE.

Q: What is the impact of higher operating temperature range on substitute selection?

A: ADG1611BRUZ variants and DG454EQ-T1-E3 extend operating temperature to 125°C, compared to the PS391EEE specification of 85°C. This provides additional thermal margin for applications in elevated-temperature environments. MAX4711EUE+ and MAX4711EUE+T maintain the 85°C upper limit matching the PS391EEE.

Q: How do charge injection and channel capacitance differences affect circuit performance?

A: Charge injection and channel capacitance are provided parameters for engineering evaluation. ADG1611 variants exhibit higher charge injection (170pC vs. 3pC) and higher channel capacitance (60pF vs. 12pF) compared to PS391EEE. DG454EQ-T1-E3 and MAX4711 variants show intermediate values. These differences may impact signal integrity in precision analog applications and require circuit-level analysis.

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