DG401DY IC Switch SPST-NOX2 45OHM 16SOIC Equivalent & Substitute Parts

Part Overview

The DG401DY is a 2-circuit IC switch with SPST-NO (Single Pole Single Throw - Normally Open) configuration, rated at 45Ohm on-state resistance, housed in a 16-SOIC surface mount package. This component is classified as obsolete, making identification of suitable alternatives essential for ongoing production and maintenance applications. The DG401DY+ serves as the direct active-status successor, maintaining identical electrical and mechanical specifications while offering improved compliance status.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO
Number of Circuits	2
Multiplexer/Demultiplexer Configuration	1:1
On-State Resistance (Max)	45Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm
Voltage - Supply, Single (V+)	10V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	150ns, 100ns
Charge Injection	10pC
Channel Capacitance (CS(off), CD(off))	12pF, 12pF
Current - Leakage (IS(off)) (Max)	500pA
Crosstalk	-90dB @ 1MHz
Operating Temperature Range	-40°C ~ 85°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitution eligibility for the DG401DY is determined by strict equivalence across the following critical parameters:

Switch circuit topology (SPST - NO configuration)
Circuit count (2 circuits)
Multiplexer ratio (1:1)
On-state resistance specification (45Ohm maximum)
Channel-to-channel matching tolerance (500mOhm)
Supply voltage ranges (single and dual configurations)
Switching speed characteristics (Ton/Toff)
Charge injection performance (10pC)
Channel capacitance values (12pF off-state)
Leakage current specification (500pA maximum)
Crosstalk performance (-90dB @ 1MHz)
Operating temperature range (-40°C ~ 85°C)
Physical package format (16-SOIC surface mount)

The DG401DY+ maintains complete electrical and mechanical equivalence across all specified parameters, differing only in product status (active vs. obsolete) and regulatory compliance certifications.

Parameter Comparison

Parameter	DG401DY (Main Part)	DG401DY+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit	SPST - NO	SPST - NO
Number of Circuits	2	2
Multiplexer/Demultiplexer Circuit	1:1	1:1
On-State Resistance (Max)	45Ohm	45Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm	500mOhm
Voltage - Supply, Single (V+)	10V ~ 30V	10V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	150ns, 100ns	150ns, 100ns
Charge Injection	10pC	10pC
Channel Capacitance (CS(off), CD(off))	12pF, 12pF	12pF, 12pF
Current - Leakage (IS(off)) (Max)	500pA	500pA
Crosstalk	-90dB @ 1MHz	-90dB @ 1MHz
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Package / Case	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

The DG401DY+ is the direct equivalent for the obsolete DG401DY. Selection between these parts is determined by regulatory and compliance requirements:

For new designs or production requiring RoHS3 compliance: DG401DY+ is the appropriate selection, as it maintains full electrical equivalence while meeting current environmental regulations.
For legacy system maintenance where RoHS compliance is not mandated: Either part is electrically suitable; however, DG401DY+ is preferred due to active product status and ongoing manufacturer support.
For applications with existing DG401DY inventory: Direct substitution with DG401DY+ is electrically and mechanically valid without circuit redesign.

Both parts share identical electrical performance, switching characteristics, and physical packaging, ensuring drop-in compatibility in existing PCB layouts.

Frequently Asked Questions (FAQ)

Q: Can DG401DY+ be used as a direct replacement for DG401DY in existing designs?

A: Yes. The DG401DY+ is electrically and mechanically equivalent to the DG401DY across all specified parameters. No circuit modifications are required for substitution.

Q: What is the primary difference between DG401DY and DG401DY+?

A: The DG401DY+ is the active-status successor with ROHS3 compliance certification, while the DG401DY is classified as obsolete and RoHS non-compliant. Electrical performance and package specifications are identical.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the 16-SOIC (0.154", 3.90mm Width) surface mount package with identical pinout and mechanical dimensions.

Q: What supply voltage configurations are supported?

A: Both parts support single supply operation (10V ~ 30V) and dual supply operation (±4.5V ~ 20V).

Q: What is the maximum on-state resistance specification?

A: The maximum on-state resistance for both parts is 45Ohm, with channel-to-channel matching tolerance of 500mOhm.

Q: Are moisture sensitivity considerations different between the two parts?

A: No. Both parts have identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited).

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