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DG419LDY Equivalent & Substitute Parts
Part Overview
The DG419LDY is a single-circuit SPDT (Single Pole Double Throw) analog switch manufactured by Analog Devices Inc./Maxim Integrated. This interface component operates as a 2:1 multiplexer/demultiplexer with 35Ohm on-state resistance and is housed in an 8-SOIC surface mount package. The DG419LDY is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Switch Circuit Type | SPDT |
| Multiplexer/Demultiplexer Configuration | 2:1 |
| Number of Circuits | 1 |
| On-State Resistance (Max) | 35Ohm |
| Channel-to-Channel Matching (ΔRon) | 100mOhm |
| Voltage - Supply, Single (V+) | 9V ~ 36V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V |
| Charge Injection | 15pC |
| Channel Capacitance (CS(off), CD(off)) | 8pF, 8pF |
| Current - Leakage (IS(off)) (Max) | 250pA |
| Crosstalk | -86dB @ 1MHz |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution eligibility for the DG419LDY is determined by strict equivalence across the following critical parameters:
- Switch circuit topology (SPDT configuration)
- Multiplexer/demultiplexer ratio (2:1)
- On-state resistance specification (35Ohm maximum)
- Channel-to-channel matching tolerance (100mOhm)
- Supply voltage ranges (single and dual supply compatibility)
- Charge injection and capacitance characteristics
- Leakage current and crosstalk performance
- Operating temperature range (-40°C ~ 85°C)
- Package type and pin configuration (8-SOIC)
The DG419LDY+ meets all substitution criteria as a direct functional equivalent with identical electrical specifications and mechanical compatibility.
Parameter Comparison
| Parameter | DG419LDY | DG419LDY+ |
|---|---|---|
| Switch Circuit | SPDT | SPDT |
| Multiplexer/Demultiplexer Circuit | 2:1 | 2:1 |
| Number of Circuits | 1 | 1 |
| On-State Resistance (Max) | 35Ohm | 35Ohm |
| Channel-to-Channel Matching (ΔRon) | 100mOhm | 100mOhm |
| Voltage - Supply, Single (V+) | 9V ~ 36V | 9V ~ 36V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V | ±4.5V ~ 20V |
| Charge Injection | 15pC | 15pC |
| Channel Capacitance (CS(off), CD(off)) | 8pF, 8pF | 8pF, 8pF |
| Current - Leakage (IS(off)) (Max) | 250pA | 250pA |
| Crosstalk | -86dB @ 1MHz | -86dB @ 1MHz |
| Operating Temperature | -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) |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The DG419LDY+ is the direct substitute for the obsolete DG419LDY. Both parts share identical electrical and mechanical specifications, ensuring pin-for-pin and functional compatibility. The primary distinction is product status and regulatory compliance: the DG419LDY+ is actively manufactured and ROHS3 compliant, whereas the DG419LDY is obsolete and RoHS non-compliant.
For new designs or production continuity, the DG419LDY+ is the appropriate selection. Both parts are manufactured by Analog Devices Inc./Maxim Integrated and supplied in 8-SOIC surface mount packaging. The DG419LDY+ is available in Tube packaging with higher inventory availability.
Frequently Asked Questions (FAQ)
Q: Can the DG419LDY+ be used as a direct replacement for the DG419LDY?
A: Yes. The DG419LDY+ is electrically and mechanically identical to the DG419LDY across all specified parameters, including switch topology, on-state resistance, supply voltage ranges, and package configuration. Pin-for-pin substitution is supported without circuit modification.
Q: What is the primary reason to transition from DG419LDY to DG419LDY+?
A: The DG419LDY is classified as obsolete, while the DG419LDY+ is actively manufactured. Additionally, the DG419LDY+ is ROHS3 compliant, meeting current regulatory requirements for electronic components in many jurisdictions.
Q: Are there any differences in packaging between these parts?
A: Both parts use the 8-SOIC (0.154", 3.90mm Width) surface mount package. The DG419LDY+ is supplied in Tube packaging, while the DG419LDY packaging specification is not detailed. This does not affect electrical or mechanical compatibility.
Q: What supply voltage configurations are supported?
A: Both parts support single supply operation (9V ~ 36V) and dual supply operation (±4.5V ~ 20V), providing flexibility for various circuit topologies.
Q: Are these parts suitable for high-frequency applications?
A: Both parts exhibit -86dB crosstalk at 1MHz and 15pC charge injection, supporting applications requiring low signal coupling and minimal charge feedthrough. Specific bandwidth limitations are not specified in the provided parameters.
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