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DG441C/D Equivalent & Substitute Parts
Part Overview
The DG441C/D is a 4-circuit IC switch manufactured by Analog Devices Inc./Maxim Integrated, configured as SPST-NC (Single Pole Single Throw - Normally Closed) with 85Ohm on-state resistance. This die-format component is designed for precision switching applications requiring low on-state resistance and minimal crosstalk. The product is currently obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.
Substiute Parts
Key Parameters
| Parameter | DG441C/D Value |
|---|---|
| Switch Circuit Configuration | SPST - NC |
| Number of Circuits | 4 |
| Multiplexer/Demultiplexer Circuit | 1:1 |
| On-State Resistance (Max) | 85Ohm |
| Channel-to-Channel Matching (ΔRon) | 4Ohm (Max) |
| Voltage - Supply, Single (V+) | 10V ~ 30V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V |
| Switch Time (Ton, Toff) (Max) | 250ns, 120ns |
| Charge Injection | 5pC |
| Channel Capacitance (CS(off), CD(off)) | 4pF, 4pF |
| Current - Leakage (IS(off)) (Max) | 500pA |
| Crosstalk | -100dB @ 1MHz |
| Operating Temperature | 0°C ~ 70°C |
| Mounting Type | Surface Mount |
| Package / Case | Die |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution of the DG441C/D is determined by the following critical parameters:
- Switch Configuration: SPST topology with 4 independent circuits
- On-State Resistance: Maximum 85Ohm with channel matching tolerance of 4Ohm
- Supply Voltage Range: Dual supply operation (±4.5V ~ 20V) or single supply (10V ~ 30V)
- Switching Performance: Maximum switching times of 250ns (Ton) and 120ns (Toff)
- Signal Integrity: Crosstalk specification of -100dB @ 1MHz and charge injection of 5pC
- Compliance: ROHS3 compliance and MSL Level 1 rating
The MAX4545CAP+ qualifies as a substitute based on its SPST 4-channel architecture, compatible supply voltage ranges, and superior on-state resistance performance. However, packaging differs from the die format of the original component.
Parameter Comparison
| Parameter | DG441C/D | MAX4545CAP+ |
|---|---|---|
| Switch Circuit Configuration | SPST - NC | SPST |
| Number of Channels | 4 | 4 |
| Multiplexer/Demultiplexer Circuit | 1:1 | 1:1 |
| On-State Resistance (Max) | 85Ohm | 20Ohm |
| Voltage - Supply, Single (V+) | 10V ~ 30V | 2.7V ~ 12V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V | ±2.7V ~ 6V |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Mounting Type | Surface Mount | Surface Mount |
| Package / Case | Die | 20-SSOP (0.209", 5.30mm Width) |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
Engineering Selection Recommendations
The MAX4545CAP+ is the manufacturer-recommended substitute for the obsolete DG441C/D. Both components maintain ROHS3 compliance and MSL Level 1 ratings, ensuring regulatory and environmental compatibility.
Key considerations for selection:
- On-State Resistance: The MAX4545CAP+ provides superior performance at 20Ohm maximum versus 85Ohm, reducing power dissipation in switching applications.
- Supply Voltage Range: The MAX4545CAP+ operates at lower supply voltages (2.7V ~ 12V single supply; ±2.7V ~ 6V dual supply) compared to the DG441C/D. System voltage requirements must be verified for compatibility.
- Packaging: The MAX4545CAP+ is supplied in 20-SSOP package format, requiring PCB layout redesign from the die format of the original component.
- Product Status: The MAX4545CAP+ is active and in production, ensuring long-term availability and supply chain stability.
Frequently Asked Questions (FAQ)
Q: Can the MAX4545CAP+ directly replace the DG441C/D in existing designs?
A: Electrical substitution is feasible based on SPST 4-channel architecture and compatible operating temperature ranges. However, packaging differs significantly (20-SSOP versus die format), requiring PCB redesign. Supply voltage ranges must be verified against system requirements.
Q: What is the primary advantage of the MAX4545CAP+ over the DG441C/D?
A: The MAX4545CAP+ provides lower on-state resistance (20Ohm maximum versus 85Ohm), resulting in reduced power dissipation and improved signal integrity in switching applications.
Q: Are there supply voltage compatibility issues between these components?
A: The MAX4545CAP+ operates at lower maximum supply voltages. Systems requiring the DG441C/D's higher voltage range (up to ±20V dual supply) must verify that the MAX4545CAP+ maximum ratings (±6V dual supply) are sufficient for the application.
Q: What packaging considerations apply to substitution?
A: The DG441C/D is supplied as a die, while the MAX4545CAP+ is packaged in 20-SSOP format. This requires complete PCB layout redesign and may impact board space allocation and thermal management strategies.
Q: Are both components compliant with current regulatory standards?
A: Yes. Both the DG441C/D and MAX4545CAP+ are ROHS3 compliant and carry MSL Level 1 ratings, meeting current environmental and reliability requirements.
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