DG403DY IC Switch SPDT 2:1 45Ohm 16-SOIC Equivalent & Substitute Parts

Part Overview

The DG403DY is a dual-circuit SPDT (Single Pole Double Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-SOIC surface mount package. This component functions as a 2:1 multiplexer/demultiplexer with 45Ohm on-state resistance, designed for signal routing and switching applications in analog circuits.

The DG403DY is classified as obsolete. Equivalent and substitute parts are available from active product lines that maintain electrical and mechanical compatibility within specified parameter tolerances.

Key Parameters

Parameter	Value
Switch Circuit Type	SPDT
Multiplexer/Demultiplexer Configuration	2:1
Number of Circuits	2
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	-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 DG403DY is determined by the following critical parameters:

Primary Compatibility Criteria:

Switch circuit topology (SPDT or SPST-NO/NC)
Multiplexer/demultiplexer configuration (2:1 or 1:1)
On-state resistance maximum rating (45Ohm)
Package type (16-SOIC surface mount)
Operating temperature range (-40°C ~ 85°C)

Secondary Compatibility Criteria:

Supply voltage ranges (single and dual)
Switch timing specifications (Ton, Toff)
Leakage current and crosstalk performance
Channel capacitance values

Substitute parts are grouped into two categories:

Category A - Direct Electrical Equivalents (SPDT 2:1 Configuration): Parts maintaining identical switch circuit topology and multiplexer configuration. These include DG403DY+ (Analog Devices), DG403DYZ (Renesas), and DG403DYZ-T (Renesas).

Category B - Functional Alternatives (SPST-NO/NC 1:1 Configuration): Parts with different switch topology (SPST instead of SPDT) and different multiplexer configuration (1:1 instead of 2:1). These include DG403DY-E3 and DG403DY-T1-E3 (Vishay Siliconix). These parts are suitable only for applications requiring single-pole switching without multiplexing capability.

Parameter Comparison

Parameter	DG403DY (Main)	DG403DY+	DG403DY-E3	DG403DY-T1-E3	DG403DYZ	DG403DYZ-T
Manufacturer	Analog Devices Inc./Maxim	Analog Devices Inc./Maxim	Vishay Siliconix	Vishay Siliconix	Renesas Electronics	Renesas Electronics
Product Status	Obsolete	Active	Active	Active	Active	Active
Switch Circuit	SPDT	SPDT	SPST - NO/NC	SPST - NO/NC	SPDT	SPDT
Multiplexer/Demultiplexer	2:1	2:1	1:1	1:1	2:1	2:1
On-State Resistance (Max)	45Ohm	45Ohm	45Ohm	45Ohm	45Ohm	45Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm	500mOhm	3Ohm	3Ohm	3Ohm	3Ohm
Voltage - Supply, Single (V+)	10V ~ 30V	10V ~ 30V	13V ~ 36V	13V ~ 36V	5V ~ 34V	5V ~ 34V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±4.5V ~ 20V	±7V ~ 22V	±7V ~ 22V	±5V ~ 17V	±5V ~ 17V
Switch Time (Ton, Toff) (Max)	150ns, 100ns	150ns, 100ns	150ns, 100ns	150ns, 100ns	150ns, 100ns	150ns, 100ns
Charge Injection	10pC	10pC	60pC	60pC	60pC	60pC
Channel Capacitance (CS(off), CD(off))	12pF, 12pF	12pF, 12pF	12pF, 12pF	12pF, 12pF	12pF, 12pF	12pF, 12pF
Current - Leakage (IS(off)) (Max)	500pA	500pA	500pA	500pA	500pA	500pA
Crosstalk	-90dB @ 1MHz	-90dB @ 1MHz	-90dB @ 1MHz	-90dB @ 1MHz	-90dB @ 1MHz	-90dB @ 1MHz
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)
Packaging	-	Tube	Tube	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®

Engineering Selection Recommendations

For Direct Replacement (SPDT 2:1 Multiplexer Applications):

DG403DY+ is the primary direct substitute. It maintains identical electrical specifications and switch topology while offering active product status and ROHS3 compliance. Packaging is available in tube format.

DG403DYZ and DG403DYZ-T (Renesas) provide SPDT 2:1 functionality with active status and ROHS3 compliance. These parts feature expanded single supply voltage range (5V ~ 34V) compared to the original DG403DY (10V ~ 30V), providing greater design flexibility. Moisture sensitivity level is MSL 3 (168 Hours) versus MSL 1 (Unlimited) for the original. DG403DYZ-T is available in cut tape and digi-reel packaging for high-volume applications.

For Single-Pole Switching Applications (SPST-NO/NC 1:1 Configuration):

DG403DY-E3 and DG403DY-T1-E3 (Vishay Siliconix) are functional alternatives suitable only for applications requiring single-pole switching without multiplexing capability. These parts are not direct replacements for SPDT 2:1 multiplexer circuits. Both offer active status and ROHS3 compliance with MSL 1 (Unlimited).

Compliance Considerations:

All substitute parts are ROHS3 compliant and REACH unaffected, addressing environmental regulatory requirements. The original DG403DY is RoHS non-compliant, making substitution necessary for new designs subject to RoHS directives.

Frequently Asked Questions (FAQ)

Q: Can DG403DY-E3 or DG403DY-T1-E3 replace DG403DY in all applications?

A: No. DG403DY-E3 and DG403DY-T1-E3 feature SPST-NO/NC topology with 1:1 configuration, whereas DG403DY is SPDT with 2:1 multiplexer configuration. These parts are suitable only for single-pole switching applications. For applications requiring dual-circuit SPDT 2:1 multiplexing, use DG403DY+, DG403DYZ, or DG403DYZ-T.

Q: What is the difference between DG403DY+ and DG403DYZ?

A: Both are SPDT 2:1 direct equivalents with identical switch topology and on-state resistance. Key differences include: DG403DY+ (Analog Devices) supports 10V ~ 30V single supply and ±4.5V ~ 20V dual supply; DG403DYZ (Renesas) supports 5V ~ 34V single supply and ±5V ~ 17V dual supply. DG403DYZ offers wider single supply voltage range. DG403DY+ has MSL 1 (Unlimited); DG403DYZ has MSL 3 (168 Hours).

Q: What does MSL 3 (168 Hours) mean for DG403DYZ and DG403DYZ-T?

A: Moisture Sensitivity Level 3 indicates the component can be exposed to moisture for a maximum of 168 hours before soldering. Components must be stored in dry conditions and baked before reflow soldering if moisture absorption limits are exceeded. MSL 1 (Unlimited) parts like DG403DY+ have no moisture exposure time restrictions.

Q: Are all substitute parts available in the same packaging options?

A: No. DG403DY+ is available in tube packaging. DG403DYZ is available in tube packaging. DG403DYZ-T is available in cut tape and digi-reel packaging. DG403DY-E3 is available in tube packaging. DG403DY-T1-E3 is available in cut tape and digi-reel packaging. Select packaging based on assembly requirements and volume.

Q: Why is the original DG403DY obsolete?

A: The DG403DY is classified as obsolete by the manufacturer. Active equivalent products from Analog Devices (DG403DY+), Renesas (DG403DYZ, DG403DYZ-T), and Vishay Siliconix (DG403DY-E3, DG403DY-T1-E3) are available for new designs and production continuity.

Q: What is the significance of the 500mOhm channel-to-channel matching in DG403DY?

A: Channel-to-channel matching (ΔRon) of 500mOhm indicates the maximum difference in on-state resistance between the two circuits. This specification is critical for applications requiring balanced signal routing. Substitute parts DG403DYZ and DG403DYZ-T have 3Ohm matching, which is looser but acceptable for most applications. DG403DY+ maintains 500mOhm matching.

Q: Can DG403DY be used in new designs?

A: No. DG403DY is obsolete. New designs must use active substitute parts. DG403DY+ is the recommended direct replacement for designs requiring SPDT 2:1 multiplexer functionality with specifications matching the original.

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