DG403DY Equivalent & Substitute Parts

Part Overview

The DG403DY is a 2-circuit IC switch with SPDT (Single Pole Double Throw) configuration and 45Ohm on-state resistance, manufactured by Renesas Electronics Corporation in 16-SOIC surface mount packaging. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The DG403DY operates across a wide supply voltage range (5V to 34V single supply, ±5V to ±17V dual supply) with fast switching characteristics (150ns turn-on, 100ns turn-off) and low leakage current (500pA maximum). Its 2:1 multiplexer/demultiplexer configuration with 3Ohm channel-to-channel matching and -90dB crosstalk at 1MHz makes it suitable for precision analog signal routing applications.

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)	3Ohm
Voltage - Supply, Single (V+)	5V ~ 34V
Voltage - Supply, Dual (V±)	±5V ~ 17V
Switch Time (Ton, Toff) (Max)	150ns, 100ns
Charge Injection	60pC
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
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the DG403DY is determined by the following critical parameters:

Primary Compatibility Criteria:

Switch circuit type (SPDT required)
Multiplexer/demultiplexer configuration (2:1 required)
Number of circuits (2 required)
On-state resistance maximum (45Ohm or lower)
Package type (16-SOIC required)
Mounting type (Surface Mount required)

Secondary Compatibility Criteria:

Supply voltage ranges must encompass or match the application requirements
Switch timing characteristics (Ton, Toff)
Channel capacitance and leakage current specifications
Operating temperature range

Substitute parts are grouped into three categories:

Category 1: Direct Equivalents (Identical Electrical Specifications) Parts with matching SPDT 2:1 configuration, 45Ohm on-state resistance, 3Ohm channel matching, 60pC charge injection, and identical supply voltage ranges. These parts differ only in packaging format (Tube vs. Tape & Reel) or product status (Active vs. Obsolete).

Category 2: Functional Equivalents (Relaxed Channel Matching) Parts with SPDT 2:1 configuration and 45Ohm on-state resistance but with 500mOhm channel-to-channel matching (versus 3Ohm). These parts have reduced supply voltage ranges (10V ~ 30V single, ±4.5V ~ 20V dual) and lower charge injection (10pC). Suitable for applications where tighter channel matching is not required.

Category 3: Alternative Topology (SPST Configuration) Parts with SPST-NO/NC topology (1:1 configuration) instead of SPDT 2:1. These provide different switching architecture and higher supply voltage ranges (13V ~ 36V single, ±7V ~ 22V dual) with identical 45Ohm on-state resistance and 3Ohm channel matching.

Parameter Comparison

Part Number	Manufacturer	Switch Circuit	Mux/Demux Config	Ron (Max)	ΔRon	V+ Range	V± Range	Ton/Toff (Max)	Charge Injection	Operating Temp	Packaging	Product Status	RoHS Status
DG403DY	Renesas Electronics	SPDT	2:1	45Ohm	3Ohm	5V ~ 34V	±5V ~ 17V	150ns, 100ns	60pC	-40°C ~ 85°C	16-SOIC	Obsolete	Non-compliant
DG403DYZ	Renesas Electronics	SPDT	2:1	45Ohm	3Ohm	5V ~ 34V	±5V ~ 17V	150ns, 100ns	60pC	-40°C ~ 85°C	16-SOIC (Tube)	Active	ROHS3 Compliant
DG403CY+	Analog Devices Inc./Maxim	SPDT	2:1	45Ohm	500mOhm	10V ~ 30V	±4.5V ~ 20V	150ns, 100ns	10pC	0°C ~ 70°C	16-SOIC (Tube)	Active	ROHS3 Compliant
DG403DY+	Analog Devices Inc./Maxim	SPDT	2:1	45Ohm	500mOhm	10V ~ 30V	±4.5V ~ 20V	150ns, 100ns	10pC	-40°C ~ 85°C	16-SOIC (Tube)	Active	ROHS3 Compliant
DG403DY+T	Analog Devices Inc./Maxim	SPDT	2:1	45Ohm	500mOhm	10V ~ 30V	±4.5V ~ 20V	150ns, 100ns	10pC	-40°C ~ 85°C	16-SOIC (TR)	Active	ROHS3 Compliant
DG403DY-E3	Vishay Siliconix	SPST - NO/NC	1:1	45Ohm	3Ohm	13V ~ 36V	±7V ~ 22V	150ns, 100ns	60pC	-40°C ~ 85°C	16-SOIC (Tube)	Active	ROHS3 Compliant
DG403DY-T1-E3	Vishay Siliconix	SPST - NO/NC	1:1	45Ohm	3Ohm	13V ~ 36V	±7V ~ 22V	150ns, 100ns	60pC	-40°C ~ 85°C	16-SOIC (CT)	Active	ROHS3 Compliant
MAX303CSE+	Analog Devices Inc./Maxim	SPDT	2:1	35Ohm	500mOhm	10V ~ 30V	±4.5V ~ 20V	150ns, 100ns	10pC	0°C ~ 70°C	16-SOIC (Tube)	Active	ROHS3 Compliant
MAX303CSE+T	Analog Devices Inc./Maxim	SPDT	2:1	35Ohm	500mOhm	10V ~ 30V	±4.5V ~ 20V	150ns, 100ns	10pC	0°C ~ 70°C	16-SOIC (TR)	Active	ROHS3 Compliant
MAX303ESE+	Analog Devices Inc./Maxim	SPDT	2:1	35Ohm	500mOhm	10V ~ 30V	±4.5V ~ 20V	150ns, 100ns	10pC	-40°C ~ 85°C	16-SOIC (Tube)	Active	ROHS3 Compliant
MAX303ESE+T	Analog Devices Inc./Maxim	SPDT	2:1	35Ohm	500mOhm	10V ~ 30V	±4.5V ~ 20V	150ns, 100ns	10pC	-40°C ~ 85°C	16-SOIC (TR)	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

DG403DYZ is the primary direct equivalent. It maintains all electrical specifications of the original DG403DY (SPDT 2:1, 45Ohm Ron, 3Ohm channel matching, 60pC charge injection, 5V-34V single supply, ±5V-±17V dual supply) while offering active product status and ROHS3 compliance. The part is available in Tube packaging with 1446 units in stock.

For Active Product Status with Extended Temperature Range:

DG403DY+ and DG403DY+T (Analog Devices Inc./Maxim Integrated) provide active product status and extended operating temperature range (-40°C to 85°C). These parts maintain the original -40°C to 85°C temperature specification but operate with reduced supply voltage ranges (10V-30V single, ±4.5V-±20V dual) and relaxed channel matching (500mOhm versus 3Ohm). Channel-to-channel matching degradation and reduced charge injection (10pC) must be evaluated against application requirements. DG403DY+T offers Tape & Reel packaging with 3503 units in stock.

For Improved On-State Resistance:

MAX303ESE+ and MAX303ESE+T (Analog Devices Inc./Maxim Integrated) reduce on-state resistance to 35Ohm while maintaining SPDT 2:1 configuration and identical switching timing. These parts operate across 10V-30V single supply and ±4.5V-±20V dual supply ranges with extended temperature support (-40°C to 85°C for ESE+ variants). MAX303ESE+ is available in Tube packaging (2158 units) and MAX303ESE+T in Tape & Reel (3600 units).

For Alternative Topology (SPST Configuration):

DG403DY-E3 and DG403DY-T1-E3 (Vishay Siliconix) provide SPST-NO/NC topology with 1:1 multiplexer configuration instead of SPDT 2:1. These parts maintain 45Ohm on-state resistance and 3Ohm channel matching with higher supply voltage ranges (13V-36V single, ±7V-±22V dual). Topology change requires circuit redesign and is suitable only for applications where SPST switching architecture is acceptable. DG403DY-T1-E3 offers highest inventory (16987 units) in Cut Tape & Digi-Reel packaging.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant, addressing environmental compliance requirements. The original DG403DY is RoHS non-compliant. Moisture sensitivity levels are consistent across all parts (MSL 1 for most variants, MSL 3 for DG403DYZ).

Frequently Asked Questions (FAQ)

Q: Can DG403DY+ be used as a direct replacement for DG403DY?

A: DG403DY+ maintains identical SPDT 2:1 configuration, 45Ohm on-state resistance, and -40°C to 85°C operating temperature. However, it operates with reduced supply voltage ranges (10V-30V single versus 5V-34V, and ±4.5V-±20V dual versus ±5V-±17V) and relaxed channel-to-channel matching (500mOhm versus 3Ohm). Substitution is valid only if the application supply voltages fall within the reduced range and channel matching tolerance is acceptable.

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

A: Both parts are electrically identical. DG403DY+ is supplied in Tube packaging, while DG403DY+T is supplied in Tape & Reel (TR) format. Selection depends on assembly process requirements and volume needs.

Q: Why do MAX303 parts have lower on-state resistance (35Ohm) than DG403DY (45Ohm)?

A: MAX303 series represents an improved design with lower on-state resistance. The 35Ohm specification is a superior characteristic that reduces signal attenuation in analog routing applications. MAX303 parts are fully compatible with DG403DY applications requiring 45Ohm or lower resistance.

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

A: DG403DY-E3 uses SPST-NO/NC topology (1:1 configuration) instead of SPDT 2:1. This represents a different switching architecture and requires circuit redesign. Substitution is not direct and is only valid for applications where SPST switching is functionally equivalent.

Q: What is the significance of the 3Ohm versus 500mOhm channel-to-channel matching specification?

A: Channel-to-channel matching (ΔRon) specifies the maximum resistance variation between the two circuits in the IC. The original DG403DY specifies 3Ohm matching, while functional equivalents specify 500mOhm. Tighter matching (3Ohm) is critical for precision analog applications requiring balanced signal routing. Applications with relaxed matching requirements can use 500mOhm variants.

Q: Are all substitute parts available in 16-SOIC packaging?

A: Yes, all substitute parts listed are available in 16-SOIC (0.154", 3.90mm Width) surface mount packaging, maintaining PCB layout compatibility with the original DG403DY.

Q: What is the inventory status for immediate procurement?

A: DG403DYZ (direct equivalent) has 1446 units in stock. DG403DY+T and MAX303ESE+T offer highest availability with 3503 and 3600 units respectively. DG403DY-T1-E3 (Vishay Siliconix) provides maximum inventory at 16987 units for applications accepting SPST topology.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message