DG412LDQ Equivalent & Substitute Parts

Part Overview

The DG412LDQ is a 4-circuit SPST-NO IC switch manufactured by Vishay Siliconix, housed in a 16-TSSOP surface mount package. This part features a maximum on-state resistance of 17Ohm and operates across supply voltages of 2.7V to 12V (single supply) or ±3V to ±6V (dual supply). The DG412LDQ is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

DG412LDQ

Vishay SiliconixIn Stock: 3842DG412LDQ Datasheet

Current PartRFQ

DG412CUE+

Analog Devices Inc./Maxim IntegratedIn Stock: 2859DG412CUE+ Datasheet

MFR RecommendedRFQ

DG412CUE+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2223DG412CUE+T Datasheet

MFR RecommendedRFQ

DG412EUE+

Analog Devices Inc./Maxim IntegratedIn Stock: 1306DG412EUE+ Datasheet

MFR RecommendedRFQ

DG412EUE+T

Analog Devices Inc./Maxim IntegratedIn Stock: 4383DG412EUE+T Datasheet

MFR RecommendedRFQ

DG445DVZ

Renesas Electronics CorporationIn Stock: 1525DG445DVZ Datasheet

MFR RecommendedRFQ

DG445DVZ-T

Renesas Electronics CorporationIn Stock: 1937DG445DVZ-T Datasheet

MFR RecommendedRFQ

MAX4678EUE+

Analog Devices Inc./Maxim IntegratedIn Stock: 2162MAX4678EUE+ Datasheet

MFR RecommendedRFQ

MAX4678EUE+T

Analog Devices Inc./Maxim IntegratedIn Stock: 2261MAX4678EUE+T Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the DG412LDQ is determined by the following critical parameters:

• Switch Circuit Configuration: SPST - NO (Single Pole Single Throw - Normally Open)
• Number of Circuits: 4 independent circuits
• Package Type: 16-TSSOP surface mount
• Multiplexer/Demultiplexer Circuit: 1:1 ratio
• Supply Voltage Compatibility: Single supply (2.7V minimum) or dual supply (±3V minimum)
• Operating Temperature Range: -40°C to 85°C preferred for extended industrial applications

Substitute parts are grouped into three categories based on on-state resistance characteristics:

Group 1 - Low Resistance (1.6Ohm): MAX4678EUE+ and MAX4678EUE+T offer the lowest on-state resistance, suitable for applications requiring minimal signal attenuation and low power dissipation.

Group 2 - Medium Resistance (45Ohm): DG412CUE+, DG412CUE+T, and DG412EUE+ provide moderate on-state resistance with active product status and RoHS3 compliance.

Group 3 - Higher Resistance (85Ohm): DG445DVZ and DG445DVZ-T deliver higher on-state resistance with superior crosstalk performance (-100dB @ 1MHz).

Parameter Comparison

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: All substitute parts (DG412CUE+, DG412CUE+T, DG412EUE+, DG412EUE+T, DG445DVZ, DG445DVZ-T, MAX4678EUE+, MAX4678EUE+T) are ROHS3 compliant, whereas the original DG412LDQ is RoHS non-compliant. Selection of any substitute part satisfies modern regulatory compliance mandates.

For Extended Temperature Range (-40°C to 85°C): DG412EUE+, DG412EUE+T, DG445DVZ, DG445DVZ-T, MAX4678EUE+, and MAX4678EUE+T support the full -40°C to 85°C operating range. DG412CUE+ and DG412CUE+T are limited to 0°C to 70°C.

For Low On-State Resistance: MAX4678EUE+ and MAX4678EUE+T deliver 1.6Ohm maximum on-state resistance, closest to the original DG412LDQ at 17Ohm. These parts minimize signal loss and power dissipation in low-voltage switching applications.

For High-Voltage Supply Compatibility: DG445DVZ and DG445DVZ-T support the widest supply voltage range (5V to 34V single supply, ±5V to ±22V dual supply), suitable for applications requiring extended voltage headroom.

For Packaging Format: Tube packaging is available in DG412CUE+, DG412EUE+, DG445DVZ, and MAX4678EUE+. Tape & Reel (TR) packaging is available in DG412CUE+T, DG412EUE+T, DG445DVZ-T, and MAX4678EUE+T for high-volume production environments.

Frequently Asked Questions (FAQ)

Q: Can DG412CUE+ directly replace DG412LDQ in all applications?

A: DG412CUE+ shares the same 4-circuit SPST-NO configuration and 16-TSSOP package as DG412LDQ. However, it has a higher on-state resistance (45Ohm vs. 17Ohm), narrower operating temperature range (0°C to 70°C vs. -40°C to 85°C), and higher supply voltage requirements (10V to 30V vs. 2.7V to 12V). Verify your application's voltage, temperature, and resistance specifications before substitution.

Q: What is the difference between tube and tape & reel packaging?

A: Tube packaging (DG412CUE+, DG412EUE+, DG445DVZ, MAX4678EUE+) is suitable for lower-volume applications and manual assembly. Tape & Reel packaging (DG412CUE+T, DG412EUE+T, DG445DVZ-T, MAX4678EUE+T) is designed for automated pick-and-place assembly in high-volume production. Both formats contain identical electrical specifications.

Q: Why does MAX4678EUE+ have significantly lower on-state resistance than other substitutes?

A: MAX4678EUE+ is optimized for low-resistance switching applications with 1.6Ohm maximum on-state resistance. This design choice results in lower power dissipation and reduced signal attenuation, but at the cost of higher charge injection (85pC) and larger channel capacitance (85pF) compared to other substitutes. Select this part only if your application requires minimal on-state resistance.

Q: Is DG445DVZ suitable for applications requiring the lowest crosstalk performance?

A: DG445DVZ and DG445DVZ-T deliver the lowest crosstalk specification at -100dB @ 1MHz, compared to -95dB for DG412LDQ and -84dB to -85dB for other substitutes. This makes DG445DVZ the preferred choice for high-frequency or sensitive analog signal switching applications where crosstalk isolation is critical.

Q: Which substitute part maintains the closest electrical performance to DG412LDQ?

A: DG412EUE+ and DG412EUE+T provide the best balance of compatibility with the original DG412LDQ. Both support the full -40°C to 85°C operating temperature range and maintain the same 4-circuit SPST-NO configuration and 16-TSSOP package. The primary trade-off is higher on-state resistance (45Ohm vs. 17Ohm) and higher supply voltage requirements (10V to 30V vs. 2.7V to 12V).