DG412LDY-T1 Equivalent & Substitute Parts

Part Overview

The DG412LDY-T1 is a 4-circuit SPST-NO IC switch manufactured by Vishay Siliconix in 16-SOIC surface mount packaging. This interface component features 1:1 multiplexer/demultiplexer configuration with 17Ohm on-state resistance and operates across 2.7V to 12V single supply or ±3V to ±6V dual supply voltage ranges. The product is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	DG412LDY-T1
Manufacturer	Vishay Siliconix
Switch Circuit	SPST - NO
Number of Circuits	4
On-State Resistance (Max)	17Ohm
Voltage - Supply, Single (V+)	2.7V ~ 12V
Voltage - Supply, Dual (V±)	±3V ~ 6V
Switch Time (Ton, Toff) (Max)	19ns, 12ns
-3dB Bandwidth	280MHz
Charge Injection	5pC
Channel Capacitance (CS(off), CD(off))	5pF, 6pF
Current - Leakage (IS(off)) (Max)	250pA
Crosstalk	-95dB @ 1MHz
Operating Temperature	-40°C ~ 85°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DG412LDY-T1 is determined by the following critical parameters:

Mandatory Compatibility Criteria:

Switch circuit type: SPST - NO
Number of circuits: 4
Multiplexer/demultiplexer configuration: 1:1
Package type: 16-SOIC surface mount
Pinout compatibility: Base product number DG412

Electrical Parameter Ranges for Substitution:

On-state resistance must not exceed application requirements (DG412LDY-T1: 17Ohm maximum)
Supply voltage ranges must encompass or exceed the original specification
Operating temperature range must cover or exceed -40°C to 85°C
Switch timing, bandwidth, and leakage characteristics must be compatible with circuit requirements

Substitute Parts Identified:

DG412CY+ and DG412CY+T (Analog Devices Inc./Maxim Integrated) – 45Ohm on-state resistance, 10V–30V single supply, 0°C–70°C operating range
DG412DY+ and DG412DY+T (Analog Devices Inc./Maxim Integrated) – 45Ohm on-state resistance, 10V–30V single supply, -40°C–85°C operating range
DG412DYZ and DG412DYZ-T (Renesas Electronics Corporation) – 35Ohm on-state resistance, 5V–44V single supply, -40°C–85°C operating range
MAX4605CSE+ and MAX4605CSE+T (Analog Devices Inc./Maxim Integrated) – 4Ohm on-state resistance, 4.5V–36V single supply, 0°C–70°C operating range

Parameter Comparison

Parameter	DG412LDY-T1	DG412CY+	DG412CY+T	DG412DY+	DG412DY+T	DG412DYZ	DG412DYZ-T	MAX4605CSE+	MAX4605CSE+T
Manufacturer	Vishay Siliconix	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Analog Devices/Maxim	Renesas	Renesas	Analog Devices/Maxim	Analog Devices/Maxim
Switch Circuit	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	4	4	4	4	4	4	4	4	4
On-State Resistance (Max)	17Ohm	45Ohm	45Ohm	45Ohm	45Ohm	35Ohm	35Ohm	4Ohm	4Ohm
Voltage - Supply, Single (V+)	2.7V ~ 12V	10V ~ 30V	10V ~ 30V	10V ~ 30V	10V ~ 30V	5V ~ 44V	5V ~ 44V	4.5V ~ 36V	4.5V ~ 36V
Voltage - Supply, Dual (V±)	±3V ~ 6V	±4.5V ~ 20V	±4.5V ~ 20V	±4.5V ~ 20V	±4.5V ~ 20V	±5V ~ 20V	±5V ~ 20V	±4.5V ~ 20V	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	19ns, 12ns	175ns, 145ns	175ns, 145ns	175ns, 145ns	175ns, 145ns	175ns, 145ns	175ns, 145ns	120ns, 130ns	120ns, 130ns
-3dB Bandwidth	280MHz	—	—	—	—	—	—	—	—
Charge Injection	5pC	5pC	5pC	5pC	5pC	5pC	5pC	225pC	225pC
Channel Capacitance (CS(off), CD(off))	5pF, 6pF	9pF, 9pF	9pF, 9pF	9pF, 9pF	9pF, 9pF	9pF, 9pF	9pF, 9pF	34pF, 34pF	34pF, 34pF
Current - Leakage (IS(off)) (Max)	250pA	250pA	250pA	250pA	250pA	100pA	100pA	500pA	500pA
Crosstalk	-95dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	-85dB @ 1MHz	-60dB @ 1MHz	-60dB @ 1MHz
Operating Temperature	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	0°C ~ 70°C	0°C ~ 70°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Product Status	Obsolete	Active	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	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Full Temperature Range Coverage (-40°C to 85°C): Select DG412DY+, DG412DY+T, DG412DYZ, or DG412DYZ-T. These parts maintain the extended operating temperature range of the original DG412LDY-T1. DG412DYZ and DG412DYZ-T offer the lowest on-state resistance (35Ohm) and lowest leakage current (100pA) among this group, with the widest single supply voltage range (5V–44V).

For RoHS3 Compliance: All substitute parts listed are ROHS3 compliant, addressing regulatory requirements that the original obsolete part does not meet.

For Reduced On-State Resistance: MAX4605CSE+ and MAX4605CSE+T provide the lowest on-state resistance (4Ohm) with superior channel-to-channel matching (200mOhm). These are suitable for applications requiring minimal signal attenuation. Operating temperature range is limited to 0°C–70°C.

For Packaging Format: Tube packaging is available in DG412CY+, DG412DY+, DG412DYZ, and MAX4605CSE+. Tape & Reel (TR) packaging is available in DG412CY+T, DG412DY+T, DG412DYZ-T, and MAX4605CSE+T.

For Moisture Sensitivity: DG412CY+, DG412CY+T, DG412DY+, and DG412DY+T carry MSL 1 (Unlimited). DG412DYZ and DG412DYZ-T carry MSL 2 (1 Year), requiring controlled storage conditions.

Frequently Asked Questions (FAQ)

Q: Can DG412CY+ or DG412CY+T be used as direct replacements for DG412LDY-T1?

A: DG412CY+ and DG412CY+T are functionally compatible in 16-SOIC package and maintain 4-circuit SPST-NO configuration. However, they are limited to 0°C–70°C operating temperature, which does not cover the full -40°C to 85°C range of the original part. Use only in applications operating within 0°C–70°C.

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

A: DG412CY+, DG412CY+T, DG412DY+, and DG412DY+T feature 45Ohm on-state resistance compared to 17Ohm in the original. DG412DYZ and DG412DYZ-T feature 35Ohm. Higher resistance increases signal attenuation and power dissipation. Verify circuit tolerance for increased resistance before selection.

Q: Are all substitute parts pin-compatible with DG412LDY-T1?

A: All substitute parts share the DG412 base product number and 16-SOIC package, maintaining identical pinout and footprint compatibility. Direct PCB substitution is mechanically feasible.

Q: Which substitute offers the best performance for high-frequency applications?

A: The original DG412LDY-T1 specifies 280MHz -3dB bandwidth. Substitute parts do not provide bandwidth specifications. For high-frequency signal switching, circuit simulation or testing is necessary to confirm performance adequacy.

Q: What are the supply voltage compatibility considerations?

A: DG412LDY-T1 operates at 2.7V–12V single supply or ±3V–±6V dual supply. All substitute parts require higher minimum supply voltages (4.5V–10V single supply minimum). Verify that application supply voltages meet substitute part requirements before selection.

Q: How does packaging format affect component handling?

A: Tube packaging (DG412CY+, DG412DY+, DG412DYZ, MAX4605CSE+) is suitable for manual assembly and lower-volume applications. Tape & Reel (TR) packaging (DG412CY+T, DG412DY+T, DG412DYZ-T, MAX4605CSE+T) is optimized for automated pick-and-place assembly and higher-volume production.

Q: What is the significance of MSL 2 rating on DG412DYZ and DG412DYZ-T?

A: MSL 2 (1 Year) requires storage in controlled humidity conditions and limits shelf life to one year from manufacturing date. MSL 1 (Unlimited) parts have no moisture sensitivity restrictions. Verify storage and handling procedures align with MSL requirements.

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