DG403CJ Equivalent & Substitute Parts

Part Overview

The DG403CJ is a dual SPDT (Single Pole Double Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated, designed for signal routing and multiplexing applications. This 16-DIP package component features 45Ohm on-state resistance and operates across single supply (10V–30V) or dual supply (±4.5V–±20V) configurations.

The DG403CJ is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support long-term product availability for legacy systems and new designs requiring compatible switching functionality.

Key Parameters

Parameter	Value
Switch Circuit Type	SPDT
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	0°C ~ 70°C
Package / Case	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution eligibility for the DG403CJ is determined by the following critical parameters:

Switch Circuit Configuration: SPDT topology for dual-channel signal routing
Number of Circuits: 2 independent switching channels
On-State Resistance: 45Ohm maximum specification
Package / Case: 16-DIP (0.300", 7.62mm) form factor for through-hole mounting
Supply Voltage Ranges: Compatibility with single supply (10V–30V) or dual supply (±4.5V–±20V) operation
Electrical Performance: Switching speed, charge injection, and leakage current specifications

Substitute parts must maintain electrical equivalence across these parameters to ensure functional interchangeability in existing circuit designs.

Parameter Comparison

Parameter	DG403CJ (Main)	DG403CJ+ (Direct Substitute)	DG403DJ-E3 (Manufacturer Recommended)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Vishay Siliconix
Product Status	Obsolete	Active	Active
Switch Circuit	SPDT	SPDT	SPDT - NO/NC
Multiplexer/Demultiplexer Circuit	2:1	2:1	1:1
Number of Circuits	2	2	2
On-State Resistance (Max)	45Ohm	45Ohm	45Ohm
Channel-to-Channel Matching (ΔRon)	500mOhm	500mOhm	Not specified
Voltage Supply - Single (V+)	10V ~ 30V	10V ~ 30V	13V ~ 36V
Voltage Supply - Dual (V±)	±4.5V ~ ±20V	±4.5V ~ ±20V	±7V ~ ±22V
Switch Time (Ton/Toff Max)	150ns / 100ns	150ns / 100ns	150ns / 100ns
Charge Injection	10pC	10pC	10pC
Channel Capacitance (CS(off) / CD(off))	12pF / 12pF	12pF / 12pF	12pF / 12pF
Current - Leakage (IS(off) Max)	500pA	500pA	500pA
Crosstalk	-90dB @ 1MHz	-90dB @ 1MHz	-90dB @ 1MHz
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°C
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

DG403CJ+ (Direct Substitute)

The DG403CJ+ is the primary equivalent for the obsolete DG403CJ. Both parts are manufactured by Analog Devices Inc./Maxim Integrated and share identical electrical specifications, including supply voltage ranges (10V–30V single, ±4.5V–±20V dual), on-state resistance (45Ohm), and switching performance parameters. The DG403CJ+ is currently in active production status with ROHS3 compliance, making it the preferred choice for new designs and legacy system replacements requiring direct pin-for-pin compatibility.

DG403DJ-E3 (Manufacturer Recommended Alternative)

The DG403DJ-E3, manufactured by Vishay Siliconix, is a manufacturer-recommended substitute offering extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) and broader supply voltage specifications (13V–36V single, ±7V–±22V dual). This part maintains core electrical performance (45Ohm on-state resistance, 150ns/100ns switching times, 10pC charge injection) and identical package form factor. The DG403DJ-E3 is ROHS3 compliant and suitable for applications requiring enhanced temperature performance. Note that the multiplexer/demultiplexer circuit topology differs (1:1 versus 2:1), which may affect circuit-level compatibility depending on application requirements.

Frequently Asked Questions (FAQ)

Q: Can DG403CJ+ be used as a direct replacement for DG403CJ?

A: Yes. The DG403CJ+ is electrically and mechanically equivalent to the DG403CJ. Both parts feature identical on-state resistance (45Ohm), supply voltage ranges, switching times, and 16-DIP package configuration. The primary difference is product status: DG403CJ+ is active production while DG403CJ is obsolete.

Q: What is the key difference between DG403CJ+ and DG403DJ-E3?

A: Both parts maintain 45Ohm on-state resistance and identical switching performance. The DG403DJ-E3 offers extended operating temperature range (-40°C to 85°C) and broader supply voltage specifications. The DG403DJ-E3 also features a 1:1 multiplexer/demultiplexer circuit topology compared to the 2:1 topology of DG403CJ/DG403CJ+. Verify circuit-level compatibility before substitution.

Q: Are all substitute parts available in the same package?

A: Yes. DG403CJ, DG403CJ+, and DG403DJ-E3 are all supplied in 16-DIP (0.300", 7.62mm) through-hole packages, ensuring mechanical interchangeability on PCBs designed for the original DG403CJ.

Q: Which substitute part should be selected for new designs?

A: For new designs requiring direct electrical equivalence, select DG403CJ+. For applications requiring extended temperature performance (-40°C to 85°C), select DG403DJ-E3 after confirming circuit-level compatibility with the 1:1 multiplexer/demultiplexer topology.

Q: Are substitute parts RoHS compliant?

A: DG403CJ+ and DG403DJ-E3 are both ROHS3 compliant. The original DG403CJ is RoHS non-compliant. For applications requiring RoHS compliance, substitute parts must be used.

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