DG417LDY Equivalent & Substitute Parts

Part Overview

The DG417LDY is a single-circuit SPST-NC (Normally Closed) analog switch manufactured by Vishay Siliconix, housed in an 8-SOIC surface mount package. This component features a 20Ohm on-state resistance and operates across supply voltages of 2.7V to 12V (single supply) or ±3V to ±6V (dual supply). The DG417LDY is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. Substitute parts must maintain functional compatibility while meeting current RoHS and REACH compliance standards.

Key Parameters

Parameter	DG417LDY
Manufacturer	Vishay Siliconix
Switch Circuit	SPST - NC
Number of Circuits	1
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	20Ohm
Voltage - Supply, Single (V+)	2.7V ~ 12V
Voltage - Supply, Dual (V±)	±3V ~ 6V
Switch Time (Ton, Toff) (Max)	43ns, 31ns
Charge Injection	1pC
Channel Capacitance (CS(off), CD(off))	5pF
Current - Leakage (IS(off)) (Max)	1nA
Crosstalk	-71dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)
Package / Case	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the DG417LDY is determined by the following critical parameters:

Switch topology: SPST-NC single-circuit configuration
Package compatibility: 8-SOIC surface mount form factor
On-state resistance: Maximum 20Ohm (substitute parts with 35Ohm resistance remain functionally compatible for most applications due to higher tolerance margins)
Supply voltage ranges: Single supply 2.7V to 12V or dual supply ±3V to ±6V
Operating temperature range: -40°C to 85°C
Leakage current and crosstalk performance: Electrical isolation characteristics

All identified substitute parts maintain the same 8-SOIC package, SPST-NC topology, and 1:1 multiplexer configuration. Substitute parts from Analog Devices Inc. (ADG417 series) and Maxim Integrated (DG417 variants) are active products with current RoHS3 compliance, addressing the obsolescence status of the original DG417LDY.

Parameter Comparison

Parameter	DG417LDY	ADG417BRZ	ADG417BRZ-REEL	DG417CY+	DG417CY+T	DG417DY+	DG417LDY+	DG417LDY+T
Manufacturer	Vishay Siliconix	Analog Devices Inc.	Analog Devices Inc.	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC	SPST - NC
Number of Circuits	1	1	1	1	1	1	1	1
On-State Resistance (Max)	20Ohm	35Ohm	35Ohm	35Ohm	35Ohm	35Ohm	35Ohm	35Ohm
Voltage - Supply, Single (V+)	2.7V ~ 12V	12V	12V	10V ~ 30V	10V ~ 30V	10V ~ 30V	9V ~ 36V	9V ~ 36V
Voltage - Supply, Dual (V±)	±3V ~ 6V	±15V	±15V	±4.5V ~ 20V	±4.5V ~ 20V	±4.5V ~ 20V	±4.5V ~ 20V	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	43ns, 31ns	160ns, 100ns	160ns, 100ns	175ns, 145ns	175ns, 145ns	175ns, 145ns	175ns, 185ns	175ns, 185ns
Charge Injection	1pC	7pC	7pC	3pC	3pC	3pC	15pC	15pC
Channel Capacitance (CS(off), CD(off))	5pF	6pF, 6pF	6pF, 6pF	8pF, 8pF	8pF, 8pF	8pF, 8pF	8pF, 8pF	8pF, 8pF
Current - Leakage (IS(off)) (Max)	1nA	250pA	250pA	250pA	250pA	250pA	250pA	250pA
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	-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)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)	8-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes for Full Compatibility:

DG417LDY+ and DG417LDY+T are the closest functional equivalents, maintaining the extended operating temperature range (-40°C to 85°C) and supply voltage specifications (9V to 36V single supply, ±4.5V to ±20V dual supply) that encompass the original DG417LDY operating envelope. Both variants are active products with ROHS3 compliance. Selection between DG417LDY+ (Tube packaging) and DG417LDY+T (Tape & Reel packaging) depends on procurement and assembly requirements.

Secondary Substitutes for Extended Supply Voltage Applications:

DG417CY+, DG417CY+T, and DG417DY+ offer wider single supply voltage ranges (10V to 30V) and maintain the -40°C to 85°C operating temperature specification (DG417DY+ only). These parts are suitable for applications requiring higher supply voltage flexibility. DG417CY+ and DG417CY+T operate within 0°C to 70°C temperature range and are not recommended for designs requiring full -40°C to 85°C operation.

Alternative for Dual Supply Applications:

ADG417BRZ and ADG417BRZ-REEL from Analog Devices Inc. support ±15V dual supply operation with -40°C to 85°C temperature range. These parts are suitable for applications with higher dual supply voltage requirements. Selection between ADG417BRZ (Tube) and ADG417BRZ-REEL (Cut Tape & Digi-Reel) depends on packaging preference.

All substitute parts maintain SPST-NC topology, 1:1 multiplexer configuration, 8-SOIC package geometry, and surface mount compatibility with the original DG417LDY. All active substitutes are ROHS3 compliant and REACH unaffected.

Frequently Asked Questions (FAQ)

Q: Can DG417LDY be directly replaced with DG417LDY+ or DG417LDY+T?

A: Yes. DG417LDY+ and DG417LDY+T are direct functional equivalents with identical SPST-NC topology, 8-SOIC package, and operating temperature range (-40°C to 85°C). The primary difference is packaging format: DG417LDY+ is supplied in Tube, while DG417LDY+T is supplied in Tape & Reel. Both are active products with ROHS3 compliance.

Q: What is the impact of increased on-state resistance in substitute parts?

A: Substitute parts feature 35Ohm maximum on-state resistance compared to the original 20Ohm specification. This 75% increase in resistance affects signal attenuation and power dissipation in switching applications. Applications with strict impedance matching or low-signal-level requirements must evaluate circuit performance impact.

Q: Are there temperature range limitations with certain substitutes?

A: DG417CY+ and DG417CY+T operate within 0°C to 70°C, which is narrower than the original -40°C to 85°C range. These parts are not suitable for designs requiring full industrial temperature operation. DG417DY+, DG417LDY+, DG417LDY+T, and ADG417BRZ variants maintain the full -40°C to 85°C operating range.

Q: What packaging options are available for substitutes?

A: Substitute parts are available in three packaging formats: Tube (standard packaging), Tape & Reel (TR) for automated assembly, and Cut Tape & Digi-Reel (CT) for mixed-volume procurement. All maintain identical 8-SOIC form factor and pin configuration.

Q: Is RoHS compliance a factor in selecting substitutes?

A: Yes. The original DG417LDY is RoHS non-compliant. All active substitute parts (ADG417BRZ, DG417CY+, DG417DY+, DG417LDY+, and DG417LDY+T) are ROHS3 compliant, meeting current regulatory requirements for new designs and production.

Q: Which substitute is recommended for new designs?

A: DG417LDY+ or DG417LDY+T are recommended for new designs as they provide the closest electrical and thermal specifications to the original part while maintaining active product status and full RoHS3 compliance. Selection between Tube and Tape & Reel packaging depends on manufacturing volume and assembly process requirements.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message