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PS398CSE Equivalent & Substitute Parts
Part Overview
The PS398CSE is an 8:1 multiplexer/demultiplexer IC manufactured by Diodes Incorporated, housed in a 16-SOIC package with 100Ohm on-state resistance. This part is classified as obsolete, making substitute components necessary for new designs and ongoing production requirements. The PS398CSE operates across single supply voltages of 3V to 15V or dual supplies of ±3V to ±8V, with switching times of 150ns and low charge injection of 2.8pC.
Substiute Parts
Key Parameters
| Parameter | PS398CSE Value |
|---|---|
| Multiplexer/Demultiplexer Circuit | 8:1 |
| Number of Circuits | 1 |
| On-State Resistance (Max) | 100Ohm |
| Channel-to-Channel Matching (ΔRon) | 6Ohm (Max) |
| Voltage - Supply, Single (V+) | 3V ~ 15V |
| Voltage - Supply, Dual (V±) | ±3V ~ 8V |
| Switch Time (Ton, Toff) (Max) | 150ns, 150ns |
| Charge Injection | 2.8pC |
| Channel Capacitance (CS(off), CD(off)) | 3.6pF, 31pF |
| Current - Leakage (IS(off)) (Max) | 50nA |
| Crosstalk | -92dB @ 100kHz |
| Package / Case | 16-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the PS398CSE is determined by the following critical parameters:
Mandatory Compatibility Criteria:
- Multiplexer/Demultiplexer configuration: 8:1
- Number of circuits: 1
- Package type: 16-SOIC
- Mounting type: Surface Mount
- On-state resistance tolerance and value range
- Supply voltage compatibility (single and/or dual supply)
- Switch time performance
- Leakage current specifications
Grouping Logic:
Substitute parts are organized into two functional categories based on on-state resistance and supply voltage characteristics:
Category A - Direct Electrical Equivalents (100Ohm On-State Resistance): Parts with matching 100Ohm on-state resistance, identical supply voltage ranges, and equivalent switching performance. These provide pin-for-pin compatibility with minimal circuit redesign.
Category B - Functional Alternatives (Higher On-State Resistance): Parts with increased on-state resistance (200Ohm to 1.8kOhm) but compatible 8:1 multiplexer topology. These require circuit evaluation for impedance-dependent applications but maintain functional compatibility for logic-level switching applications.
Parameter Comparison
| Parameter | PS398CSE | MAX398ESE+T | MAX398CSE+ | ADG1208YRZ | ADG1308BRZ-REEL7 | DG508BEY-T1-E3 | HI9P0548-5Z |
|---|---|---|---|---|---|---|---|
| Manufacturer | Diodes Inc. | Analog Devices/Maxim | Analog Devices/Maxim | Analog Devices | Analog Devices | Vishay Siliconix | Renesas |
| Product Status | Obsolete | Active | Active | Active | Active | Active | Active |
| Multiplexer Circuit | 8:1 | 8:1 | 8:1 | 8:1 | 8:1 | 8:1 | 8:1 |
| On-State Resistance (Max) | 100Ohm | 100Ohm | 100Ohm | 200Ohm | 210Ohm | 380Ohm | 1.8kOhm |
| Channel-to-Channel Matching (ΔRon) | 6Ohm (Max) | 6Ohm (Max) | 6Ohm (Max) | 4.6Ohm | 5Ohm | 10Ohm | 126Ohm |
| Voltage - Supply, Single (V+) | 3V ~ 15V | 3V ~ 15V | 3V ~ 15V | 5V ~ 16.5V | 5V ~ 16.5V | 12V ~ 44V | — |
| Voltage - Supply, Dual (V±) | ±3V ~ 8V | ±3V ~ 8V | ±3V ~ 8V | ±5V ~ 16.5V | ±5V ~ 16.5V | ±5V ~ 20V | ±15V |
| Switch Time (Ton, Toff) (Max) | 150ns, 150ns | 150ns, 150ns | 150ns, 150ns | 95ns, 100ns | 100ns, 100ns | 250ns, 240ns | 300ns, 300ns (Typ) |
| Charge Injection | 2.8pC | 2pC | 2pC | 0.4pC | 2pC | 2pC | — |
| Current - Leakage (IS(off)) (Max) | 50nA | 100pA | 100pA | 100pA | 1nA | 1nA | 30pA (Typ) |
| Crosstalk | -92dB @ 100kHz | -92dB @ 100kHz | -92dB @ 100kHz | -85dB @ 1MHz | -80dB @ 1MHz | -88dB @ 1MHz | — |
| Package / Case | 16-SOIC (0.295", 7.50mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.154", 3.90mm) | 16-SOIC (0.154", 3.90mm) |
| Operating Temperature | — | -40°C ~ 85°C | 0°C ~ 70°C | -40°C ~ 125°C | -40°C ~ 105°C | -40°C ~ 125°C | 0°C ~ 75°C |
| 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) | 3 (168 Hours) |
Engineering Selection Recommendations
Direct Replacement (100Ohm Category):
MAX398ESE+T and MAX398CSE+ are active production parts from Analog Devices/Maxim Integrated with identical on-state resistance (100Ohm), matching supply voltage ranges (3V ~ 15V single, ±3V ~ 8V dual), and equivalent switching performance (150ns). Both are ROHS3 compliant with MSL 1 rating. MAX398ESE+T offers extended operating temperature range (-40°C ~ 85°C) compared to MAX398CSE+ (0°C ~ 70°C). These parts provide electrical equivalence with package geometry differences (0.154" width versus 0.295" width of PS398CSE).
Functional Alternatives (Higher Resistance Category):
ADG1208YRZ and ADG1308BRZ-REEL7 are active Analog Devices parts with 8:1 multiplexer topology and higher on-state resistance (200Ohm and 210Ohm respectively). Both support extended supply voltage ranges (5V ~ 16.5V single, ±5V ~ 16.5V dual) and offer improved switching performance (95-100ns). ADG1208YRZ provides superior charge injection (0.4pC) and lower leakage current (100pA). These parts are suitable for applications where impedance tolerance permits higher on-state resistance.
DG508BEY-T1-E3 from Vishay Siliconix operates with 380Ohm on-state resistance and extended supply voltage range (12V ~ 44V single, ±5V ~ 20V dual). This part is appropriate for high-voltage applications but exhibits slower switching (250ns, 240ns) and higher crosstalk (-88dB).
HI9P0548-5Z from Renesas operates exclusively on dual supply (±15V) with significantly higher on-state resistance (1.8kOhm) and MSL 3 rating. This part is limited to applications requiring ±15V dual supply operation and is not suitable for single supply or lower voltage dual supply configurations.
All substitute parts maintain 16-SOIC package format, surface mount mounting type, and ROHS3 compliance. Selection depends on supply voltage requirements, impedance tolerance, switching speed requirements, and operating temperature range.
Frequently Asked Questions (FAQ)
Q: Can MAX398ESE+T directly replace PS398CSE in existing PCB layouts?
A: Electrical substitution is direct due to identical on-state resistance (100Ohm), supply voltage ranges, and switching performance. However, package geometry differs: PS398CSE uses 16-SOIC with 0.295" width while MAX398ESE+T uses 0.154" width. PCB footprint modification is required.
Q: What is the primary reason for substituting PS398CSE?
A: PS398CSE is classified as obsolete. Active production alternatives must be selected for new designs and ongoing manufacturing. MAX398ESE+T and MAX398CSE+ provide direct electrical equivalence from active manufacturers.
Q: Are ADG1208YRZ and ADG1308BRZ-REEL7 suitable for applications requiring 100Ohm on-state resistance?
A: No. These parts operate at 200Ohm and 210Ohm on-state resistance respectively. They are functional alternatives for 8:1 multiplexing but introduce higher impedance. Circuit evaluation is required for applications sensitive to on-state resistance values.
Q: What is the significance of the package width difference between PS398CSE and substitute parts?
A: PS398CSE uses 16-SOIC with 0.295" width (wide body). Most active substitutes use 16-SOIC with 0.154" width (narrow body). This requires PCB footprint redesign. Verify PCB layout compatibility before component selection.
Q: Can HI9P0548-5Z be used in applications requiring single supply voltage operation?
A: No. HI9P0548-5Z operates exclusively on dual supply (±15V). It is not compatible with single supply voltage applications. This part is limited to designs requiring ±15V dual supply operation.
Q: What is the difference between MAX398ESE+T and MAX398CSE+ in terms of operating temperature?
A: MAX398ESE+T operates across -40°C ~ 85°C while MAX398CSE+ operates across 0°C ~ 70°C. For applications requiring extended low-temperature operation below 0°C, MAX398ESE+T is the appropriate selection.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant. HI9P0548-5Z carries MSL 3 rating (168 Hours) while all other parts carry MSL 1 rating (Unlimited). MSL rating affects moisture sensitivity handling requirements during storage and assembly.
Q: What switching performance improvement is available with ADG1208YRZ compared to PS398CSE?
A: ADG1208YRZ provides faster switching: 95ns (Ton) and 100ns (Toff) compared to PS398CSE at 150ns for both. This represents approximately 37% improvement in switching speed, beneficial for high-frequency applications.
Q: Is crosstalk performance a critical differentiator between substitute options?
A: Crosstalk performance varies across substitutes: PS398CSE and MAX398 series provide -92dB @ 100kHz, while ADG and DG series provide -85dB to -88dB @ 1MHz. Selection depends on application sensitivity to crosstalk at specific frequency ranges.
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