DG401CJ Equivalent & Substitute Parts

Part Overview

The DG401CJ is a 2-circuit IC switch with SPST-NO configuration and 45Ohm on-state resistance, manufactured by Analog Devices Inc./Maxim Integrated. This component is classified as obsolete, which necessitates identification of equivalent substitute parts for ongoing design support and procurement. The DG401CJ operates across single supply (10V to 30V) or dual supply (±4.5V to ±20V) configurations with 16-DIP through-hole packaging.

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	0°C ~ 70°C (TA)
Mounting Type	Through Hole
Package / Case	16-DIP (0.300", 7.62mm)
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution eligibility for the DG401CJ is determined by the following critical parameters:

Switch circuit topology (SPST - NO)
Number of circuits (2)
Multiplexer configuration (1:1)
On-state resistance maximum (45Ohm)
Package type and form factor (16-DIP through-hole)
Supply voltage ranges (single and dual)
Switch timing characteristics (Ton, Toff)
Leakage current specification (500pA max)

The identified substitute parts maintain these core electrical and mechanical specifications, ensuring functional compatibility in existing circuit designs. Variations in secondary parameters such as charge injection, crosstalk performance, and operating temperature range are noted but do not preclude substitution where the primary specifications align.

Parameter Comparison

Parameter	DG401CJ (Main)	DG401CJ+ (Direct)	DG401DJ-E3 (MFR Recommended)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Vishay Siliconix
Product Status	Obsolete	Active	Active
Switch Circuit	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	2	2	2
Multiplexer Configuration	1:1	1:1	1:1
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	60pC
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	-94.8dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

DG401CJ+ (Direct Substitute)

The DG401CJ+ is manufactured by the same supplier (Analog Devices Inc./Maxim Integrated) and maintains identical electrical specifications to the obsolete DG401CJ. This part is currently in active production status with 1098 units in stock. The primary distinction is RoHS3 compliance, making it suitable for applications requiring environmental regulation adherence. Electrical performance is equivalent across all specified parameters.

DG401DJ-E3 (Manufacturer-Recommended Alternative)

The DG401DJ-E3, manufactured by Vishay Siliconix, provides an alternative from a different supplier while maintaining core functional specifications. This part is active in production with 2076 units available. Key differences include:

Extended operating temperature range (-40°C to 85°C versus 0°C to 70°C)
Expanded supply voltage ranges (13V to 36V single supply; ±7V to ±22V dual supply)
Higher charge injection (60pC versus 10pC)
Improved crosstalk performance (-94.8dB versus -90dB @ 1MHz)
RoHS3 compliance

The DG401DJ-E3 is suitable for applications requiring extended temperature operation or higher supply voltage tolerance. The increased charge injection may impact precision analog switching applications sensitive to this parameter.

Frequently Asked Questions (FAQ)

Q: Can DG401CJ+ be used as a direct replacement for DG401CJ?

A: Yes. The DG401CJ+ maintains identical electrical specifications and package configuration. The primary difference is RoHS3 compliance status. Both parts are manufactured by Analog Devices Inc./Maxim Integrated and are electrically interchangeable.

Q: What are the key differences between DG401CJ+ and DG401DJ-E3?

A: Both parts maintain the same switch circuit topology, on-state resistance, and package form factor. The DG401DJ-E3 offers extended operating temperature range (-40°C to 85°C), wider supply voltage specifications, and improved crosstalk performance. However, it exhibits higher charge injection (60pC versus 10pC), which may be significant in precision applications. The DG401DJ-E3 is manufactured by Vishay Siliconix rather than Analog Devices.

Q: Are all substitute parts available in 16-DIP through-hole packaging?

A: Yes. All identified substitute parts (DG401CJ+ and DG401DJ-E3) are packaged in 16-DIP (0.300", 7.62mm) through-hole configuration, ensuring mechanical compatibility with existing PCB layouts.

Q: Which substitute should be selected for new designs?

A: Selection depends on application requirements. For direct replacement with RoHS compliance, use DG401CJ+. For applications requiring extended temperature operation (-40°C to 85°C) or higher supply voltage tolerance, use DG401DJ-E3. Verify charge injection requirements, as DG401DJ-E3 specifies 60pC versus 10pC for the original part.

Q: Are there RoHS compliance differences between the substitutes?

A: Yes. The original DG401CJ is RoHS non-compliant. Both DG401CJ+ and DG401DJ-E3 are ROHS3 compliant, meeting current environmental regulations.

Q: What is the significance of channel-to-channel matching (ΔRon) in substitution?

A: Channel-to-channel matching specifies the maximum resistance variation between the two circuits within a single package. The DG401CJ and DG401CJ+ both specify 500mOhm matching. The DG401DJ-E3 does not specify this parameter. For applications requiring matched channel performance, verify that the DG401DJ-E3 meets your specific matching tolerance requirements before substitution.

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