DG405BDY Equivalent & Substitute Parts

Part Overview

The DG405BDY is a 4-circuit SPST-NO analog switch IC manufactured by Vishay Siliconix in 16-SOIC surface mount packaging. This component is classified as obsolete, with 1120 units currently in stock. The DG405BDY provides low on-state resistance switching capability suitable for signal routing and multiplexing applications across industrial and commercial temperature ranges.

Due to its obsolete product status, identifying equivalent and substitute parts is essential for design continuity, long-term supply chain planning, and new design implementations. Active alternatives with comparable or improved electrical characteristics are available from both Vishay Siliconix and Analog Devices Inc./Maxim Integrated.

Substiute Parts

DG405BDY

Vishay SiliconixIn Stock: 1160DG405BDY Datasheet

Current PartRFQ

DG401BDY-E3

Vishay SiliconixIn Stock: 1105DG401BDY-E3 Datasheet

Parametric EquivalentRFQ

DG401DY-E3

Vishay SiliconixIn Stock: 838DG401DY-E3 Datasheet

Parametric EquivalentRFQ

DG405BDY-E3

Vishay SiliconixIn Stock: 760DG405BDY-E3 Datasheet

Parametric EquivalentRFQ

DG412DY+

Analog Devices Inc./Maxim IntegratedIn Stock: 1170DG412DY+ Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DG405BDY is determined by the following critical parameters:

Circuit Configuration: The part must maintain 4 independent SPST-NO switch circuits in a 1:1 multiplexer/demultiplexer configuration.

Electrical Performance: On-state resistance of 45Ohm maximum, supply voltage ranges (13V ~ 36V single supply or ±7V ~ 22V dual supply), and operating temperature range of -40°C ~ 85°C.

Package Compatibility: 16-SOIC surface mount package with 0.154" (3.90mm) width for direct PCB footprint compatibility.

Switching Characteristics: Switch times (Ton ≤ 150ns, Toff ≤ 100ns), charge injection of 60pC, and channel capacitance specifications (12pF each for CS(off) and CD(off)).

Leakage and Isolation: Maximum leakage current of 500pA and crosstalk performance of -94.8dB @ 1MHz.

Substitute parts are categorized as follows:

Parametric Equivalents (DG401BDY-E3, DG401DY-E3, DG405BDY-E3): Identical electrical specifications with active product status and improved RoHS compliance.

Manufacturer Recommended Substitute (DG412DY+): Alternative from Analog Devices Inc./Maxim Integrated with 4-circuit configuration and comparable performance characteristics, though with different supply voltage and timing specifications.

Parameter Comparison

Engineering Selection Recommendations

Direct Replacement (4-Circuit Configuration)

The DG405BDY-E3 is the primary direct replacement. It maintains identical electrical specifications, 4-circuit configuration, and 16-SOIC packaging while offering active product status and ROHS3 compliance. This part is recommended for new designs and existing applications requiring pin-for-pin compatibility.

Alternative from Vishay Siliconix (2-Circuit Configuration)

The DG401BDY-E3 and DG401DY-E3 are active Vishay Siliconix alternatives with identical electrical performance but reduced to 2 independent circuits. These parts are suitable for applications requiring fewer switching channels, with the advantage of active product status and ROHS3 compliance. Design modification is required to accommodate the reduced circuit count.

Cross-Manufacturer Substitute (Analog Devices Inc./Maxim Integrated)

The DG412DY+ is a manufacturer-recommended substitute from Analog Devices Inc./Maxim Integrated. It maintains the 4-circuit SPST-NO configuration and 16-SOIC package. Key differences include narrower supply voltage ranges (10V ~ 30V single supply, ±4.5V ~ 20V dual supply), slightly longer switch times (175ns Ton, 145ns Toff), and improved leakage characteristics (250pA maximum). The DG412DY+ also features superior charge injection (5pC) and lower channel capacitance (9pF each). This part is suitable for applications where the supply voltage range is compatible and improved leakage performance is beneficial.

Compliance Considerations

All substitute parts listed are ROHS3 compliant, addressing the RoHS non-compliance status of the obsolete DG405BDY. For applications subject to RoHS regulations, substitution to any of the listed active parts is necessary.

Frequently Asked Questions (FAQ)

Q: Can DG401BDY-E3 or DG401DY-E3 directly replace DG405BDY in existing designs?

A: These parts are not direct pin-for-pin replacements due to reduced circuit count (2 circuits versus 4 circuits). PCB layout and schematic modifications are required. They are suitable only for applications requiring 2 or fewer independent switch channels.

Q: What is the primary advantage of DG405BDY-E3 over the original DG405BDY?

A: The DG405BDY-E3 provides identical electrical performance and circuit configuration while offering active product status, improved availability, and ROHS3 compliance. It is the recommended direct replacement for obsolete DG405BDY applications.

Q: Can DG412DY+ be used as a direct replacement for DG405BDY?

A: The DG412DY+ maintains the same 4-circuit configuration and 16-SOIC package, enabling direct PCB footprint compatibility. However, the narrower supply voltage ranges (10V ~ 30V single supply versus 13V ~ 36V, and ±4.5V ~ 20V dual supply versus ±7V ~ 22V) must be verified against application requirements. Slightly longer switch times (175ns Ton, 145ns Toff versus 150ns, 100ns) should be evaluated for timing-critical applications.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts listed (DG401BDY-E3, DG401DY-E3, DG405BDY-E3, and DG412DY+) are supplied in 16-SOIC surface mount packages with 0.154" (3.90mm) width, ensuring PCB footprint compatibility.

Q: What are the key electrical differences between DG405BDY-E3 and DG412DY+?

A: Both parts maintain 45Ohm on-state resistance and identical operating temperature range. DG412DY+ offers improved leakage current (250pA versus 500pA), lower charge injection (5pC versus 60pC), and reduced channel capacitance (9pF versus 12pF). However, DG412DY+ has narrower supply voltage ranges and slightly longer switch times. Supply voltage compatibility must be confirmed for the target application.

Q: Why is the DG405BDY classified as obsolete?

A: The DG405BDY is no longer in active production by Vishay Siliconix. The DG405BDY-E3 is the active successor, providing equivalent functionality with improved compliance and availability.

Q: Can DG412DY+ be used in applications with supply voltages above 30V single supply?

A: No. The DG412DY+ maximum single supply voltage is 30V, compared to 36V for DG405BDY. Applications requiring supply voltages between 30V and 36V are not compatible with DG412DY+ and must use DG405BDY-E3 or other Vishay Siliconix alternatives.