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DG442CY Equivalent & Substitute Parts
Part Overview
The DG442CY is a 4-circuit IC switch manufactured by Analog Devices Inc./Maxim Integrated, configured as a SPST-NO (Single Pole Single Throw - Normally Open) multiplexer with 1:1 channel configuration. This component operates across single supply voltages of 10V to 30V or dual supply voltages of ±4.5V to ±20V, with an on-state resistance of 85Ohm maximum and fast switching times of 250ns (Ton) and 170ns (Toff).
The DG442CY is classified as obsolete. Locating equivalent or substitute components is necessary to support legacy system maintenance, design updates, or when original inventory becomes unavailable. The DG442CY+ serves as the direct active substitute, offering identical electrical and mechanical specifications with improved compliance status.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Switch Circuit Type | SPST - NO |
| Number of Circuits | 4 |
| Multiplexer/Demultiplexer Configuration | 1:1 |
| On-State Resistance (Max) | 85Ohm |
| Channel-to-Channel Matching (ΔRon Max) | 4Ohm |
| Voltage - Supply, Single (V+) | 10V ~ 30V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V |
| Switch Time - Ton (Max) | 250ns |
| Switch Time - Toff (Max) | 170ns |
| Charge Injection | 5pC |
| Channel Capacitance - CS(off) | 4pF |
| Channel Capacitance - CD(off) | 4pF |
| Current - Leakage (IS(off) Max) | 500pA |
| Crosstalk | -100dB @ 1MHz |
| Operating Temperature Range | 0°C ~ 70°C (TA) |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution of the DG442CY is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must maintain identical specifications for:
- Switch circuit topology (SPST - NO)
- Number of circuits (4)
- Multiplexer configuration (1:1)
- On-state resistance and channel matching (85Ohm, 4Ohm max)
- Supply voltage ranges (10V ~ 30V single; ±4.5V ~ 20V dual)
- Switching performance (250ns Ton, 170ns Toff)
- Signal integrity parameters (charge injection, capacitance, crosstalk)
- Operating temperature range (0°C ~ 70°C)
- Physical package (16-SOIC surface mount)
The DG442CY+ meets all these criteria and is classified as the direct equivalent substitute.
Parameter Comparison
| Parameter | DG442CY (Main Part) | DG442CY+ (Substitute) |
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Analog Devices Inc./Maxim Integrated |
| Switch Circuit | 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 Max) | 4Ohm | 4Ohm |
| Voltage - Supply, Single (V+) | 10V ~ 30V | 10V ~ 30V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V | ±4.5V ~ 20V |
| Switch Time - Ton (Max) | 250ns | 250ns |
| Switch Time - Toff (Max) | 170ns | 170ns |
| Charge Injection | 5pC | 5pC |
| Channel Capacitance - CS(off) | 4pF | 4pF |
| Channel Capacitance - CD(off) | 4pF | 4pF |
| Current - Leakage (IS(off) Max) | 500pA | 500pA |
| Crosstalk | -100dB @ 1MHz | -100dB @ 1MHz |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Package / Case | 16-SOIC (0.154", 3.90mm Width) | 16-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | 1 (Unlimited) |
| REACH Status | REACH Unaffected | REACH Unaffected |
Engineering Selection Recommendations
The DG442CY+ is the direct equivalent substitute for the DG442CY. Both components share identical electrical performance and physical packaging specifications. The primary distinction is product status and regulatory compliance: the DG442CY is obsolete, while the DG442CY+ is active and ROHS3 compliant.
For new designs or system updates, the DG442CY+ is the appropriate selection. For legacy system maintenance where the original DG442CY is specified, the DG442CY+ provides full functional and mechanical compatibility with improved compliance status.
Frequently Asked Questions (FAQ)
Q: Can the DG442CY+ be used as a direct replacement for the DG442CY?
A: Yes. The DG442CY+ is electrically and mechanically identical to the DG442CY across all specified parameters, including on-state resistance, switching times, supply voltage ranges, and 16-SOIC package dimensions. Pin-for-pin compatibility is maintained.
Q: What is the difference between the DG442CY and DG442CY+?
A: The DG442CY is classified as obsolete, while the DG442CY+ is active. The DG442CY+ is ROHS3 compliant, whereas the DG442CY is RoHS non-compliant. All electrical and mechanical specifications are identical.
Q: Are there any packaging differences between these parts?
A: Both components use the 16-SOIC surface mount package with 0.154" (3.90mm) width. The DG442CY+ is supplied in Tube packaging, while the DG442CY packaging specification was not provided in the available data.
Q: What supply voltages are supported by these components?
A: Both the DG442CY and DG442CY+ support single supply operation from 10V to 30V (V+) or dual supply operation from ±4.5V to ±20V (V±).
Q: What is the maximum on-state resistance?
A: The maximum on-state resistance for both components is 85Ohm, with channel-to-channel matching of 4Ohm maximum.
Q: What are the switching time specifications?
A: Both components have a maximum turn-on time (Ton) of 250ns and maximum turn-off time (Toff) of 170ns.
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