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DG308BAK/883 Equivalent & Substitute Parts
Part Overview
The DG308BAK/883 is a 4-circuit SPST-NO IC switch manufactured by Vishay Siliconix, designed for analog signal switching applications requiring low on-state resistance and minimal crosstalk. This component features an 85Ohm maximum on-state resistance and operates across a wide supply voltage range of 4V to 44V (single supply) or ±4V to ±22V (dual supply). The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for new designs and ongoing production requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Switch Circuit Type | SPST - NO (Single Pole Single Throw - Normally Open) |
| Number of Circuits | 4 |
| Multiplexer/Demultiplexer Configuration | 1:1 |
| On-State Resistance (Max) | 85Ohm |
| Channel-to-Channel Matching (ΔRon) | 1.7Ohm |
| Voltage - Supply, Single (V+) | 4V ~ 44V |
| Voltage - Supply, Dual (V±) | ±4V ~ 22V |
| Switch Time (Ton, Toff) (Max) | 200ns, 150ns |
| Charge Injection | 1pC |
| Channel Capacitance (CS(off), CD(off)) | 5pF, 5pF |
| Current - Leakage (IS(off)) (Max) | 500pA |
| Crosstalk | -95dB @ 100kHz |
| Operating Temperature Range | -40°C ~ 85°C |
| Package / Case | 16-CDIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
| RoHS Status | RoHS non-compliant |
Substitute Part Grouping Explanation
Substitution of the DG308BAK/883 is determined by the following critical parameters:
- Switch topology: SPST-NO configuration with 4 independent circuits in 1:1 multiplexer arrangement
- On-state resistance: Maximum 85Ohm specification
- Supply voltage compatibility: Single supply range 4V to 44V or dual supply ±4V to ±22V
- Package compatibility: 16-pin DIP form factor with 0.300" (7.62mm) pitch for through-hole mounting
- Electrical performance: Switch timing, charge injection, capacitance, leakage current, and crosstalk characteristics
The MAX362CPE+ from Analog Devices Inc./Maxim Integrated meets the core functional requirements of SPST-NO 4-circuit switching with 85Ohm on-state resistance in a compatible 16-DIP package. However, differences exist in supply voltage ranges, operating temperature, and performance specifications that must be evaluated for specific application requirements.
Parameter Comparison
| Parameter | DG308BAK/883 | MAX362CPE+ |
|---|---|---|
| Manufacturer | Vishay Siliconix | Analog Devices Inc./Maxim Integrated |
| Product Status | Obsolete | Active |
| Switch Circuit Type | SPST - NO | SPST - NO |
| Number of Circuits | 4 | 4 |
| Multiplexer Configuration | 1:1 | 1:1 |
| On-State Resistance (Max) | 85Ohm | 85Ohm |
| Channel-to-Channel Matching (ΔRon) | 1.7Ohm | 2Ohm (Max) |
| Voltage - Supply, Single (V+) | 4V ~ 44V | 10V ~ 30V |
| Voltage - Supply, Dual (V±) | ±4V ~ 22V | ±4.5V ~ 20V |
| Switch Time Ton (Max) | 200ns | 250ns |
| Switch Time Toff (Max) | 150ns | 120ns |
| Charge Injection | 1pC | 5pC |
| Channel Capacitance (CS(off), CD(off)) | 5pF, 5pF | 4pF, 4pF |
| Current - Leakage (IS(off)) (Max) | 500pA | 500pA |
| Crosstalk | -95dB @ 100kHz | -100dB @ 1MHz |
| Operating Temperature Range | -40°C ~ 85°C | 0°C ~ 70°C |
| Package / Case | 16-CDIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole | Through Hole |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Packaging | - | Tube |
Engineering Selection Recommendations
The MAX362CPE+ is an active, production-available substitute for the obsolete DG308BAK/883. Key considerations for selection:
Compatibility Assessment: Both devices share identical switch topology (SPST-NO, 4 circuits, 1:1 configuration), on-state resistance (85Ohm maximum), and through-hole 16-DIP package footprint. Pin-level compatibility exists for direct board-level substitution.
Supply Voltage Constraints: The DG308BAK/883 operates at single supply 4V to 44V; the MAX362CPE+ operates at 10V to 30V. Applications requiring operation below 10V single supply or above 30V single supply cannot use the MAX362CPE+ as a direct substitute. Dual supply operation differs: DG308BAK/883 supports ±4V to ±22V while MAX362CPE+ supports ±4.5V to ±20V.
Temperature Range Limitation: The DG308BAK/883 operates from -40°C to 85°C; the MAX362CPE+ operates from 0°C to 70°C. Applications requiring operation below 0°C or above 70°C cannot use the MAX362CPE+.
Performance Differences: The MAX362CPE+ exhibits superior crosstalk performance (-100dB @ 1MHz versus -95dB @ 100kHz) and lower channel capacitance (4pF versus 5pF). However, charge injection is higher (5pC versus 1pC) and switch-on time is slower (250ns versus 200ns).
Compliance Status: The MAX362CPE+ is ROHS3 compliant and active in production, whereas the DG308BAK/883 is RoHS non-compliant and obsolete. New designs should prioritize the MAX362CPE+ where voltage and temperature requirements permit.
Frequently Asked Questions (FAQ)
Q: Can the MAX362CPE+ directly replace the DG308BAK/883 in existing designs?
A: Direct substitution is possible only if the application operates within the MAX362CPE+ supply voltage range (10V to 30V single supply or ±4.5V to ±20V dual supply) and temperature range (0°C to 70°C). Pin configuration and package footprint are compatible. Applications requiring the extended voltage or temperature range of the DG308BAK/883 require circuit redesign or alternative components.
Q: What are the key electrical differences between these devices?
A: The primary differences are supply voltage operating ranges, temperature range, and dynamic performance. The MAX362CPE+ has lower charge injection (5pC vs 1pC), faster turn-off time (120ns vs 150ns), but slower turn-on time (250ns vs 200ns). Channel capacitance is lower in the MAX362CPE+ (4pF vs 5pF). Crosstalk performance is superior in the MAX362CPE+ (-100dB @ 1MHz vs -95dB @ 100kHz).
Q: Are the packages physically compatible?
A: Both devices use 16-pin DIP packages with 0.300" (7.62mm) pitch. The DG308BAK/883 uses 16-CDIP while the MAX362CPE+ uses 16-PDIP. Both are through-hole mounted and share identical footprints for PCB layout purposes.
Q: What compliance certifications apply to each device?
A: The DG308BAK/883 is RoHS non-compliant. The MAX362CPE+ is ROHS3 compliant. Both devices are REACH unaffected and classified under ECCN EAR99 and HTSUS 8542.39.0001.
Q: Which device should be selected for new designs?
A: The MAX362CPE+ should be selected for new designs where voltage and temperature requirements are compatible, as it is an active product with ongoing manufacturer support and RoHS3 compliance. The DG308BAK/883 is obsolete and should not be used in new designs.
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