DG417LDY-T1 Equivalent & Substitute Parts

Part Overview

The DG417LDY-T1 is a single-circuit SPST-NC (Normally Closed) analog switch IC manufactured by Vishay Siliconix in 8-SOIC surface mount packaging. This component features 20Ohm on-state resistance, operates across 2.7V to 12V single supply or ±3V to ±6V dual supply configurations, and is designed for low-impedance switching applications requiring fast switching times (43ns turn-on, 31ns turn-off).

The DG417LDY-T1 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs and field replacements.

Key Parameters

Parameter	DG417LDY-T1 Value
Switch Circuit Type	SPST - NC
Multiplexer/Demultiplexer Circuit	1:1
Number of Circuits	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)
Mounting Type	Surface Mount
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the DG417LDY-T1 is determined by the following critical parameters:

Functional Compatibility Requirements:

Switch circuit type: SPST - NC
Multiplexer/Demultiplexer circuit: 1:1
Number of circuits: 1
Package / Case: 8-SOIC (0.154", 3.90mm Width)
Mounting type: Surface Mount

Electrical Performance Considerations:

On-state resistance tolerance and maximum value
Supply voltage range compatibility (single and dual supply)
Switch timing characteristics (Ton, Toff)
Leakage current specifications
Operating temperature range

All substitute parts listed maintain identical package geometry and pinout compatibility. Substitutes differ in on-state resistance (35Ohm vs. 20Ohm), supply voltage ranges, switching speed, and charge injection characteristics. Selection depends on whether the application can tolerate higher on-state resistance and different electrical performance parameters.

Parameter Comparison

Parameter	DG417LDY-T1	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
Multiplexer/Demultiplexer Circuit	1:1	1:1	1:1	1:1	1:1	1:1	1:1	1:1
Number of Circuits	1	1	1	1	1	1	1	1
On-State Resistance (Max)	20Ohm	35Ohm	35Ohm	35Ohm	35Ohm	35Ohm	35Ohm	35Ohm
Channel-to-Channel Matching (ΔRon)	—	—	—	3Ohm (Max)	3Ohm (Max)	3Ohm (Max)	100mOhm	100mOhm
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
Crosstalk	-71dB @ 1MHz	—	—	-85dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	—	—
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)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

For RoHS3 Compliance Requirements: All substitute parts (ADG417BRZ, ADG417BRZ-REEL, DG417CY+, DG417CY+T, DG417DY+, DG417LDY+, DG417LDY+T) are ROHS3 compliant, whereas the DG417LDY-T1 is RoHS non-compliant. Applications requiring regulatory compliance with RoHS3 standards must transition to one of the active substitute parts.

For Extended Temperature Range (-40°C to 85°C): DG417CY+ and DG417CY+T are limited to 0°C to 70°C operating temperature. For applications requiring full -40°C to 85°C operation, select ADG417BRZ, ADG417BRZ-REEL, DG417DY+, DG417LDY+, or DG417LDY+T.

For Low On-State Resistance: The DG417LDY-T1 features 20Ohm on-state resistance. All substitute parts feature 35Ohm on-state resistance. Applications with strict impedance requirements may require circuit redesign or alternative component families.

For Supply Voltage Compatibility: The DG417LDY-T1 operates at 2.7V to 12V single supply. Substitute parts operate at higher minimum voltages (9V to 12V single supply). Verify supply voltage compatibility before substitution.

For Packaging and Inventory: ADG417BRZ-REEL is supplied in Cut Tape (CT) & Digi-Reel® packaging. DG417CY+T and DG417LDY+T are supplied in Tape & Reel (TR) packaging. DG417CY+, DG417DY+, and DG417LDY+ are supplied in Tube packaging. Select packaging based on production volume and assembly requirements.

Frequently Asked Questions (FAQ)

Q: Can DG417LDY-T1 be directly replaced with any of the listed substitutes?

A: All substitute parts share identical 8-SOIC package geometry and SPST-NC switch topology, enabling direct PCB-level replacement. However, electrical performance differs significantly. The DG417LDY-T1 features 20Ohm on-state resistance and faster switching times (43ns/31ns) compared to substitute parts with 35Ohm resistance and slower switching (160ns-175ns turn-on). Circuit validation is required to confirm performance compatibility.

Q: What is the primary difference between DG417LDY+ and DG417LDY+T?

A: Both parts are electrically identical. The difference is packaging: DG417LDY+ is supplied in Tube packaging, while DG417LDY+T is supplied in Tape & Reel (TR) packaging. Select based on production volume and assembly line requirements.

Q: Why do substitute parts have higher on-state resistance?

A: The DG417LDY-T1 represents an earlier generation design with lower on-state resistance (20Ohm). Current active substitutes from Analog Devices Inc./Maxim Integrated feature 35Ohm on-state resistance as part of their standard product line. Applications sensitive to impedance must evaluate circuit impact or consider alternative component families.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (ADG417BRZ, ADG417BRZ-REEL, DG417CY+, DG417CY+T, DG417DY+, DG417LDY+, DG417LDY+T) are ROHS3 compliant. The original DG417LDY-T1 is RoHS non-compliant. New designs and regulatory-compliant applications must use one of the active substitutes.

Q: Which substitute part offers the best low-temperature performance?

A: DG417CY+ and DG417CY+T are limited to 0°C minimum operating temperature. For applications requiring -40°C operation, select ADG417BRZ, ADG417BRZ-REEL, DG417DY+, DG417LDY+, or DG417LDY+T, all rated to -40°C to 85°C.

Q: What is the difference between ADG417BRZ and ADG417BRZ-REEL?

A: Both parts are electrically identical. ADG417BRZ is supplied in Tube packaging, while ADG417BRZ-REEL is supplied in Cut Tape (CT) & Digi-Reel® packaging. Selection depends on production volume and assembly equipment compatibility.

Q: Can DG417LDY-T1 be used in applications requiring ±15V dual supply?

A: No. The DG417LDY-T1 is rated for ±3V to ±6V dual supply maximum. ADG417BRZ and ADG417BRZ-REEL support ±15V dual supply. Other substitutes support ±4.5V to ±20V dual supply. Verify supply voltage compatibility before component selection.

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