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DG418CY+ Equivalent & Substitute Parts
Part Overview
The DG418CY+ is a single-circuit SPST-NO (Normally Open) analog switch manufactured by Analog Devices Inc./Maxim Integrated. This 8-SOIC surface-mount interface component provides 1:1 multiplexing functionality with 35Ohm on-state resistance, designed for signal routing and switching applications requiring low on-resistance and fast switching performance. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity while maintaining functional compatibility within specified electrical and mechanical parameters.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Switch Circuit Type | SPST - NO |
| Multiplexer/Demultiplexer Circuit | 1:1 |
| Number of Circuits | 1 |
| On-State Resistance (Max) | 35Ohm |
| Channel-to-Channel Matching (ΔRon) | 3Ohm (Max) |
| Voltage - Supply, Single (V+) | 10V ~ 30V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V |
| Switch Time (Ton, Toff) (Max) | 175ns, 145ns |
| Charge Injection | 3pC |
| Channel Capacitance (CS(off), CD(off)) | 8pF, 8pF |
| Current - Leakage (IS(off)) (Max) | 250pA |
| Crosstalk | -85dB @ 1MHz |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the DG418CY+ are grouped based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:
Critical Parameters for Substitution:
- Switch Circuit Type: SPST - NO (mandatory match)
- Multiplexer/Demultiplexer Circuit: 1:1 (mandatory match)
- Number of Circuits: 1 (mandatory match)
- Package / Case: 8-SOIC (mandatory match for PCB compatibility)
- Mounting Type: Surface Mount (mandatory match)
Allowable Parameter Variations:
- On-State Resistance (Max): Parts with 25Ohm or 35Ohm are functionally compatible; lower resistance provides improved performance
- Voltage Supply Ranges: Substitute parts may have extended or different supply voltage ranges; applications must operate within the intersection of both part specifications
- Operating Temperature Range: Substitute parts may have extended temperature ranges; applications must operate within the intersection of both part specifications
- Charge Injection and Channel Capacitance: Variations are acceptable provided application signal integrity requirements are met
- Packaging Format: Tube and Tape & Reel (TR) formats are interchangeable for the same electrical part
Substitute Parts Identified:
- DG418CY+ (Direct equivalent - Analog Devices Inc./Maxim Integrated, Tube packaging)
- DG418DY-E3 (Vishay Siliconix, Tube packaging, 35Ohm, extended temperature range)
- DG418DY-T1-E3 (Vishay Siliconix, Tape & Reel packaging, 35Ohm, extended temperature range)
- DG418BDY-E3 (Vishay Siliconix, Tube packaging, 25Ohm on-state resistance)
- DG418BDY-T1-E3 (Vishay Siliconix, Tape & Reel packaging, 25Ohm on-state resistance)
Parameter Comparison
| Parameter | DG418CY+ | DG418DY-E3 | DG418DY-T1-E3 | DG418BDY-E3 | DG418BDY-T1-E3 |
|---|---|---|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Vishay Siliconix | Vishay Siliconix | Vishay Siliconix | Vishay Siliconix |
| Switch Circuit Type | SPST - NO | SPST - NO | SPST - NO | SPST - NO | SPST - NO |
| Multiplexer/Demultiplexer Circuit | 1:1 | 1:1 | 1:1 | 1:1 | 1:1 |
| Number of Circuits | 1 | 1 | 1 | 1 | 1 |
| On-State Resistance (Max) | 35Ohm | 35Ohm | 35Ohm | 25Ohm | 25Ohm |
| Voltage - Supply, Single (V+) | 10V ~ 30V | 12V | 12V | 13V ~ 36V | 13V ~ 36V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V | ±15V | ±15V | ±7V ~ 22V | ±7V ~ 22V |
| Switch Time (Ton, Toff) (Max) | 175ns, 145ns | 175ns, 145ns | 175ns, 145ns | 89ns, 80ns | 89ns, 80ns |
| Charge Injection | 3pC | 60pC | 60pC | 38pC | 38pC |
| Channel Capacitance (CS(off), CD(off)) | 8pF, 8pF | 8pF, 8pF | 8pF, 8pF | 12pF, 12pF | 12pF, 12pF |
| Current - Leakage (IS(off)) (Max) | 250pA | 250pA | 250pA | 250pA | 250pA |
| Operating Temperature | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount | Surface Mount | Surface Mount | Surface Mount |
| Packaging Format | Tube | Tube | Tape & Reel (TR) | Tube | Tape & Reel (TR) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
All identified substitute parts maintain Active product status and ROHS3 compliance, ensuring regulatory and environmental compatibility with the DG418CY+.
For applications requiring identical electrical performance and operating temperature range (0°C ~ 70°C): The DG418CY+ remains the primary selection. Direct equivalents from Vishay Siliconix (DG418DY-E3 and DG418DY-T1-E3) provide 35Ohm on-state resistance with matching switch timing but operate across an extended temperature range (-40°C ~ 85°C). These parts are suitable only if the application environment does not exceed 70°C.
For applications requiring extended operating temperature range (-40°C ~ 85°C): DG418DY-E3 (Tube) or DG418DY-T1-E3 (Tape & Reel) provide identical 35Ohm on-state resistance and switch timing with extended temperature capability. Supply voltage ranges differ; verify application voltage requirements fall within both the original specification (10V ~ 30V single supply, ±4.5V ~ 20V dual supply) and the substitute specification (12V single supply, ±15V dual supply).
For applications where reduced on-state resistance improves performance: DG418BDY-E3 (Tube) or DG418BDY-T1-E3 (Tape & Reel) provide 25Ohm on-state resistance with faster switching times (89ns, 80ns vs. 175ns, 145ns). These parts also support extended operating temperature range (-40°C ~ 85°C). Supply voltage ranges differ; verify application voltage requirements fall within both the original specification and the substitute specification (13V ~ 36V single supply, ±7V ~ 22V dual supply).
For packaging format selection: Tube packaging (DG418CY+, DG418DY-E3, DG418BDY-E3) and Tape & Reel packaging (DG418DY-T1-E3, DG418BDY-T1-E3) are electrically identical; selection depends on assembly process requirements and inventory management practices.
Frequently Asked Questions (FAQ)
Q: Can DG418DY-E3 or DG418DY-T1-E3 be used as direct replacements for DG418CY+ in all applications?
A: DG418DY-E3 and DG418DY-T1-E3 are electrically compatible for applications operating within 0°C ~ 70°C. Both parts provide identical 35Ohm on-state resistance and switch timing. However, supply voltage specifications differ: DG418CY+ supports 10V ~ 30V single supply and ±4.5V ~ 20V dual supply, while DG418DY variants support 12V single supply and ±15V dual supply. Verify your application voltage requirements fall within both specifications before substitution.
Q: What is the advantage of using DG418BDY-E3 or DG418BDY-T1-E3 over DG418CY+?
A: DG418BDY variants provide 25Ohm on-state resistance (versus 35Ohm) and faster switching times (89ns/80ns versus 175ns/145ns). These improvements reduce signal distortion and power dissipation in switching applications. Both parts support extended operating temperature range (-40°C ~ 85°C). Supply voltage specifications differ; verify compatibility with your application requirements.
Q: Are Tube and Tape & Reel packaging formats electrically equivalent?
A: Yes. Tube packaging (DG418CY+, DG418DY-E3, DG418BDY-E3) and Tape & Reel packaging (DG418DY-T1-E3, DG418BDY-T1-E3) contain identical electrical components. Selection depends on assembly process requirements, handling procedures, and inventory management practices.
Q: What parameters must remain constant for a part to be considered a valid substitute?
A: Valid substitutes must maintain SPST-NO switch circuit type, 1:1 multiplexer/demultiplexer configuration, single-circuit design, and 8-SOIC surface-mount package. All identified substitute parts meet these mandatory criteria. On-state resistance, supply voltage ranges, operating temperature range, and charge injection may vary within application requirements.
Q: Can I use DG418BDY parts in applications designed for DG418CY+ without circuit modifications?
A: DG418BDY parts (25Ohm on-state resistance) are electrically compatible with DG418CY+ (35Ohm on-state resistance) applications. Lower on-state resistance improves performance by reducing signal attenuation and power dissipation. However, verify that your application supply voltage requirements fall within both the original specification (10V ~ 30V single supply, ±4.5V ~ 20V dual supply) and the DG418BDY specification (13V ~ 36V single supply, ±7V ~ 22V dual supply). No circuit modifications are required if voltage compatibility is confirmed.
Q: What is the significance of the -E3 and -T1-E3 designations?
A: The -E3 designation indicates Vishay Siliconix manufacturing with specific quality and compliance certifications. The -T1 designation indicates Tape & Reel packaging format. Both designations identify the same electrical component with different packaging and handling formats.
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