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PI5A391AW Equivalent & Substitute Parts
Part Overview
The PI5A391AW is a 4-circuit SPST-NC (Single Pole Single Throw - Normally Closed) IC switch manufactured by Diodes Incorporated, housed in a 16-SOIC package. This component features an 18Ohm on-state resistance and operates across a 2V to 6V supply voltage range with a 200MHz bandwidth. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI5A391AW |
| Manufacturer | Diodes Incorporated |
| Category | Interface |
| Description | IC SWITCH SPST-NCX4 18OHM 16SOIC |
| Switch Circuit | SPST - NC |
| Number of Circuits | 4 |
| Multiplexer/Demultiplexer Circuit | 1:1 |
| On-State Resistance (Max) | 18Ohm |
| Channel-to-Channel Matching (ΔRon) | 400mOhm |
| Voltage - Supply, Single (V+) | 2V ~ 6V |
| Switch Time (Ton, Toff) (Max) | 20ns, 10ns |
| -3dB Bandwidth | 200MHz |
| Charge Injection | 5pC |
| Channel Capacitance (CS(off), CD(off)) | 13pF |
| Current - Leakage (IS(off)) (Max) | 30nA |
| Crosstalk | -72dB @ 30MHz |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Product Status | Obsolete |
| RoHS Status | RoHS non-compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the PI5A391AW is determined by the following critical parameters:
- Switch Circuit Configuration: SPST - NC topology with 4 circuits in 1:1 multiplexer/demultiplexer arrangement
- Package Compatibility: 16-SOIC form factor (0.154", 3.90mm Width)
- Operating Temperature Range: -40°C ~ 85°C (TA)
- Supply Voltage Compatibility: Single supply operation within overlapping voltage ranges
- On-State Resistance: Lower resistance values are functionally compatible as they represent improved performance
- Electrical Performance: Bandwidth, charge injection, and crosstalk specifications must support the intended application
All substitute parts listed maintain the same switch circuit topology, package form factor, and operating temperature range. The substitute parts from Analog Devices Inc. (ADG711BRZ series and MAX4651ESE+ series) offer improved electrical characteristics, including lower on-state resistance (4Ohm vs. 18Ohm), faster switching times, and lower leakage currents.
Parameter Comparison
| Parameter | PI5A391AW | ADG711BRZ | ADG711BRZ-REEL | ADG711BRZ-REEL7 | MAX4651ESE+ | MAX4651ESE+T |
|---|---|---|---|---|---|---|
| Manufacturer | Diodes Inc. | Analog Devices | Analog Devices | Analog Devices | Analog Devices/Maxim | Analog Devices/Maxim |
| Switch Circuit | SPST - NC | SPST - NC | SPST - NC | SPST - NC | SPST - NC | SPST - NC |
| Number of Circuits | 4 | 4 | 4 | 4 | 4 | 4 |
| Multiplexer/Demultiplexer | 1:1 | 1:1 | 1:1 | 1:1 | 1:1 | 1:1 |
| On-State Resistance (Max) | 18Ohm | 4Ohm | 4Ohm | 4Ohm | 4Ohm | 4Ohm |
| Channel-to-Channel Matching (ΔRon) | 400mOhm | — | — | — | 50mOhm | 50mOhm |
| Voltage - Supply, Single (V+) | 2V ~ 6V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V | 1.8V ~ 5.5V |
| Switch Time (Ton, Toff) (Max) | 20ns, 10ns | 11ns, 6ns (Typ) | 11ns, 6ns (Typ) | 11ns, 6ns (Typ) | 14ns, 8ns | 14ns, 8ns |
| -3dB Bandwidth | 200MHz | 200MHz | 200MHz | 200MHz | — | — |
| Charge Injection | 5pC | 3pC | 3pC | 3pC | 2pC | 2pC |
| Channel Capacitance (CS(off), CD(off)) | 13pF | 10pF, 10pF | 10pF, 10pF | 10pF, 10pF | 16pF, 16pF | 16pF, 16pF |
| Current - Leakage (IS(off)) (Max) | 30nA | 100pA | 100pA | 100pA | 100pA | 100pA |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C |
| Package / Case | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC | 16-SOIC |
| Product Status | Obsolete | Active | Active | Active | Active | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
ADG711BRZ Series (ADG711BRZ, ADG711BRZ-REEL, ADG711BRZ-REEL7)
The ADG711BRZ family represents the primary substitute option for the PI5A391AW. All three variants share identical electrical specifications and differ only in packaging format (Tube, Cut Tape & Digi-Reel®). These parts are manufactured by Analog Devices Inc. and maintain active product status with ROHS3 compliance. The ADG711BRZ series offers superior electrical performance with 4Ohm on-state resistance, faster switching times (11ns/6ns typical), and significantly lower leakage current (100pA vs. 30nA). The supply voltage range (1.8V ~ 5.5V) overlaps with the PI5A391AW operating window, ensuring compatibility in most applications.
MAX4651ESE+ Series (MAX4651ESE+, MAX4651ESE+T)
The MAX4651ESE+ family from Analog Devices Inc./Maxim Integrated provides an alternative substitute path. Both variants feature identical electrical specifications and differ in packaging format (Tube vs. Tape & Reel). These parts maintain active product status with ROHS3 compliance. The MAX4651ESE+ series delivers 4Ohm on-state resistance with improved channel-to-channel matching (50mOhm vs. 400mOhm on the original part) and the lowest charge injection specification (2pC). The supply voltage range (1.8V ~ 5.5V) ensures compatibility with the PI5A391AW application envelope.
Packaging Considerations
Selection between ADG711BRZ variants and MAX4651ESE+ variants should be based on procurement and assembly requirements. The ADG711BRZ-REEL and ADG711BRZ-REEL7 variants, along with MAX4651ESE+T, are supplied in tape and reel format suitable for automated assembly. The ADG711BRZ and MAX4651ESE+ variants are supplied in tube packaging for manual handling or lower-volume applications.
Compliance and Product Status
All substitute parts are active products with ROHS3 compliance, addressing the RoHS non-compliance status of the obsolete PI5A391AW. This compliance improvement is significant for new designs and applications subject to environmental regulations.
Frequently Asked Questions (FAQ)
Q: Can the ADG711BRZ directly replace the PI5A391AW in existing designs?
A: Yes. Both parts maintain the same SPST-NC switch circuit topology, 4-circuit configuration, 16-SOIC package form factor, and -40°C to 85°C operating temperature range. The ADG711BRZ offers improved electrical performance with lower on-state resistance (4Ohm vs. 18Ohm) and faster switching times, making it functionally compatible and superior in most applications.
Q: What is the difference between ADG711BRZ, ADG711BRZ-REEL, and ADG711BRZ-REEL7?
A: These three part numbers represent the same electrical component with different packaging and delivery formats. ADG711BRZ is supplied in tube packaging. ADG711BRZ-REEL and ADG711BRZ-REEL7 are supplied in cut tape and digi-reel format for automated assembly. Selection depends on procurement volume and assembly process requirements.
Q: How do the MAX4651ESE+ variants differ from the ADG711BRZ series?
A: Both families provide equivalent substitution for the PI5A391AW with identical on-state resistance (4Ohm) and operating temperature range. The MAX4651ESE+ series features superior channel-to-channel matching (50mOhm vs. unspecified for ADG711BRZ) and lower charge injection (2pC vs. 3pC). The ADG711BRZ series specifies 200MHz bandwidth, while MAX4651ESE+ does not provide this specification. Selection should be based on specific application requirements and packaging preferences.
Q: Is the supply voltage range compatible between the PI5A391AW and substitute parts?
A: The PI5A391AW operates at 2V ~ 6V, while all substitute parts operate at 1.8V ~ 5.5V. The overlapping range is 2V ~ 5.5V, which covers most standard single-supply applications. Applications requiring operation above 5.5V or below 2V require design review.
Q: What are the RoHS compliance implications of switching from PI5A391AW to substitute parts?
A: The PI5A391AW is RoHS non-compliant, while all substitute parts (ADG711BRZ series and MAX4651ESE+ series) are ROHS3 compliant. This compliance improvement is mandatory for new designs and applications subject to environmental regulations in regulated markets.
Q: Are there any leakage current considerations when substituting?
A: The PI5A391AW specifies 30nA maximum leakage current, while all substitute parts specify 100pA maximum leakage current. This represents a 300-fold improvement in leakage performance, which is beneficial for low-power and precision applications.
Q: What packaging format should be selected for high-volume production?
A: For automated assembly processes, select ADG711BRZ-REEL, ADG711BRZ-REEL7, or MAX4651ESE+T, which are supplied in tape and reel format. For lower-volume or manual assembly, ADG711BRZ or MAX4651ESE+ in tube packaging are appropriate.
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