DG419DY Equivalent & Substitute Parts

Part Overview

The DG419DY is a single-circuit SPDT (Single Pole Double Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated in 8-SOIC surface mount packaging. This component functions as a 2:1 multiplexer/demultiplexer with 35Ohm on-state resistance, designed for signal routing and switching applications in analog systems.

The DG419DY is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity, ensure supply chain availability, and meet current regulatory compliance requirements including RoHS3 standards.

Key Parameters

Parameter	DG419DY (Main Part)
Switch Circuit	SPDT
Multiplexer/Demultiplexer Circuit	2:1
Number of Circuits	1
On-State Resistance (Max)	35Ohm
Channel-to-Channel Matching (ΔRon)	3Ohm (Max)
Voltage - Supply, Single (V+)	10V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	175ns, 145ns
Charge Injection	3pC
Channel Capacitance (CS(off), CD(off))	8pF, 8pF
Current - Leakage (IS(off)) (Max)	250pA
Crosstalk	-85dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DG419DY is determined by the following critical parameters:

Mandatory Matching Parameters:

Switch Circuit: SPDT
Multiplexer/Demultiplexer Circuit: 2:1
Number of Circuits: 1
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
On-State Resistance (Max): 35Ohm (for direct equivalents)

Allowable Variation Parameters:

Voltage supply ranges may differ if the application operates within the substitute part's specified range
Switch timing, charge injection, and capacitance values may vary within acceptable limits for the intended application
Operating temperature range may extend beyond the original specification
RoHS compliance status may differ (upgrades to RoHS3 are acceptable for obsolete parts)

Substitute Categories:

Category 1: Direct Equivalents (Identical Specifications)

DG419DY+ (Analog Devices Inc./Maxim Integrated) - Active status, RoHS3 compliant, Tube packaging
DG419DY-E3 (Vishay Siliconix) - Active status, RoHS3 compliant, Tube packaging
DG419DY-T1-E3 (Vishay Siliconix) - Active status, RoHS3 compliant, Cut Tape & Digi-Reel packaging

Category 2: Functional Equivalents with Lower On-State Resistance

DG419BDY-E3 (Vishay Siliconix) - 25Ohm on-state resistance, faster switching, higher charge injection
DG419BDY-T1-E3 (Vishay Siliconix) - 25Ohm on-state resistance, faster switching, higher charge injection, Tape & Reel packaging

Category 3: Cross-Manufacturer Equivalents

ADG419BRZ (Analog Devices Inc.) - 35Ohm on-state resistance, extended operating temperature to 125°C, RoHS3 compliant
ADG419BRZ-REEL (Analog Devices Inc.) - 35Ohm on-state resistance, extended operating temperature to 125°C, RoHS3 compliant, Cut Tape & Digi-Reel packaging
ADG419BRZ-REEL7 (Analog Devices Inc.) - 35Ohm on-state resistance, extended operating temperature to 125°C, RoHS3 compliant, Cut Tape & Digi-Reel packaging

Parameter Comparison

Part Number	Manufacturer	Product Status	On-State Resistance (Max)	Voltage - Supply, Single (V+)	Voltage - Supply, Dual (V±)	Switch Time Ton/Toff (Max)	Charge Injection	Channel Capacitance (CS/CD)	Operating Temperature	Packaging	RoHS Status
DG419DY	Analog Devices Inc./Maxim Integrated	Obsolete	35Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	3pC	8pF, 8pF	-40°C ~ 85°C	8-SOIC	RoHS non-compliant
DG419DY+	Analog Devices Inc./Maxim Integrated	Active	35Ohm	10V ~ 30V	±4.5V ~ 20V	175ns, 145ns	3pC	8pF, 8pF	-40°C ~ 85°C	8-SOIC (Tube)	ROHS3 Compliant
DG419DY-E3	Vishay Siliconix	Active	35Ohm	12V	±15V	175ns, 145ns	60pC	8pF, 8pF	-40°C ~ 85°C	8-SOIC (Tube)	ROHS3 Compliant
DG419DY-T1-E3	Vishay Siliconix	Active	35Ohm	12V	±15V	175ns, 145ns	60pC	8pF, 8pF	-40°C ~ 85°C	8-SOIC (Cut Tape & Digi-Reel)	ROHS3 Compliant
DG419BDY-E3	Vishay Siliconix	Active	25Ohm	13V ~ 36V	±7V ~ 22V	89ns, 80ns	38pC	12pF, 12pF	-40°C ~ 85°C	8-SOIC (Tube)	ROHS3 Compliant
DG419BDY-T1-E3	Vishay Siliconix	Active	25Ohm	13V ~ 36V	±7V ~ 22V	89ns, 80ns	38pC	12pF, 12pF	-40°C ~ 85°C	8-SOIC (Tape & Reel)	ROHS3 Compliant
ADG419BRZ	Analog Devices Inc.	Active	35Ohm	12V	±15V	—	—	6pF	-40°C ~ 125°C	8-SOIC (Tube)	ROHS3 Compliant
ADG419BRZ-REEL	Analog Devices Inc.	Active	35Ohm	12V	±15V	—	—	6pF	-40°C ~ 125°C	8-SOIC (Cut Tape & Digi-Reel)	ROHS3 Compliant
ADG419BRZ-REEL7	Analog Devices Inc.	Active	35Ohm	12V	±15V	—	—	6pF	-40°C ~ 125°C	8-SOIC (Cut Tape & Digi-Reel)	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

Select DG419DY+, DG419DY-E3, or DG419DY-T1-E3 when the original DG419DY specifications must be maintained exactly. All three parts are active products with RoHS3 compliance. Choose based on packaging requirements: Tube for DG419DY+ and DG419DY-E3, or Cut Tape & Digi-Reel for DG419DY-T1-E3.

For Enhanced Performance (Lower On-State Resistance):

Select DG419BDY-E3 or DG419BDY-T1-E3 when lower on-state resistance (25Ohm vs. 35Ohm) is beneficial. These parts offer faster switching times (89ns/80ns vs. 175ns/145ns) and support higher supply voltages (13V ~ 36V single supply). Packaging options include Tube (DG419BDY-E3) or Tape & Reel (DG419BDY-T1-E3).

For Extended Temperature Range:

Select ADG419BRZ, ADG419BRZ-REEL, or ADG419BRZ-REEL7 when operating temperature must extend to 125°C. These parts maintain 35Ohm on-state resistance and are available in Tube or Cut Tape & Digi-Reel packaging. All are RoHS3 compliant and active products.

Compliance Considerations:

All substitute parts listed are RoHS3 compliant, addressing the non-compliance status of the original DG419DY. Selection should prioritize active product status and current manufacturing availability.

Frequently Asked Questions (FAQ)

Q: Can DG419BDY-E3 or DG419BDY-T1-E3 be used as direct replacements for DG419DY?

A: DG419BDY variants are functionally compatible but not direct replacements. They feature lower on-state resistance (25Ohm vs. 35Ohm), faster switching times, and different voltage supply ranges. Use these only if the application can tolerate the lower resistance and faster switching characteristics.

Q: What is the difference between DG419DY-E3 and DG419DY-T1-E3?

A: Both parts are electrically identical with 35Ohm on-state resistance and identical switching characteristics. The difference is packaging: DG419DY-E3 is supplied in Tube, while DG419DY-T1-E3 is supplied in Cut Tape & Digi-Reel format. Select based on assembly process requirements.

Q: Are ADG419BRZ parts suitable replacements for DG419DY?

A: Yes. ADG419BRZ, ADG419BRZ-REEL, and ADG419BRZ-REEL7 maintain the same 35Ohm on-state resistance and SPDT 2:1 switching function. The primary advantage is extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). Packaging differs: ADG419BRZ is Tube, while ADG419BRZ-REEL and ADG419BRZ-REEL7 are Cut Tape & Digi-Reel.

Q: Why do some substitute parts show missing values for switch time and charge injection?

A: Missing values indicate that the manufacturer did not specify these parameters in the datasheet. This does not indicate inferior performance; it reflects different characterization or specification methodologies between manufacturers.

Q: Is the 8-SOIC package identical across all substitute parts?

A: Yes. All parts use 8-SOIC (0.154", 3.90mm Width) surface mount packaging with identical pinout and footprint. Packaging format (Tube, Tape & Reel, Cut Tape & Digi-Reel) refers to the supply method, not the component package itself.

Q: What is the significance of the -E3 suffix in Vishay part numbers?

A: The -E3 suffix indicates RoHS3 compliance and lead-free manufacturing. This is a Vishay designation for environmentally compliant versions of their components.

Q: Can I mix substitute parts from different manufacturers in the same design?

A: Yes, provided all selected parts meet the electrical requirements of the application. Verify that supply voltage ranges, operating temperature, and switching characteristics are compatible with your circuit design. All listed substitutes maintain the same 8-SOIC package footprint.

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