DG405CJ Equivalent & Substitute Parts

Part Overview

The DG405CJ is a 2-circuit IC switch with DPST-NO configuration and 45Ohm on-state resistance, manufactured by Analog Devices Inc./Maxim Integrated in a 16-DIP package. This component functions as a 2:1 multiplexer/demultiplexer for analog signal switching applications. The DG405CJ is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Switch Circuit Configuration	DPST - NO
Multiplexer/Demultiplexer Circuit	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	0°C ~ 70°C (TA)
Package / Case	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole

Substitute Part Grouping Explanation

Substitution of the DG405CJ is determined by strict equivalence across the following critical parameters:

Switch circuit configuration (DPST - NO)
Multiplexer/demultiplexer circuit topology (2:1)
Number of circuits (2)
On-state resistance maximum (45Ohm)
Package type and pin count (16-DIP)
Mounting method (Through Hole)
Supply voltage ranges that encompass or match the original specification
Switch timing characteristics (Ton, Toff)
Leakage current and crosstalk performance

The DG405DJ-E3 qualifies as a direct substitute based on matching all core functional and physical parameters. Variations in secondary characteristics such as charge injection, operating temperature range, and RoHS compliance status do not preclude substitution when the primary electrical and mechanical requirements are satisfied.

Parameter Comparison

Parameter	DG405CJ (Main Part)	DG405DJ-E3 (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Vishay Siliconix
Product Status	Obsolete	Active
Switch Circuit	DPST - NO	DPST - NO
Multiplexer/Demultiplexer Circuit	2:1	2:1
Number of Circuits	2	2
On-State Resistance (Max)	45Ohm	45Ohm
Voltage - Supply, Single (V+)	10V ~ 30V	13V ~ 36V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±7V ~ 22V
Switch Time (Ton, Toff) (Max)	150ns, 100ns	150ns, 100ns
Charge Injection	10pC	60pC
Channel Capacitance (CS(off), CD(off))	12pF, 12pF	12pF, 12pF
Current - Leakage (IS(off)) (Max)	500pA	500pA
Crosstalk	-90dB @ 1MHz	-90dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole
RoHS Status	RoHS non-compliant	ROHS3 Compliant

Engineering Selection Recommendations

The DG405DJ-E3 is a qualified substitute for the obsolete DG405CJ. Both components share identical switch circuit topology, on-state resistance, channel capacitance, leakage current, and crosstalk specifications. The 16-DIP package and through-hole mounting are identical, ensuring direct PCB compatibility without layout modifications.

The DG405DJ-E3 offers an extended operating temperature range (-40°C to 85°C versus 0°C to 70°C) and ROHS3 compliance, providing advantages for applications requiring broader environmental specifications or regulatory compliance. The substitute part maintains supply voltage compatibility within the specified ranges, though the DG405DJ-E3 specifies a narrower minimum single supply voltage (13V versus 10V) and dual supply voltage (±7V versus ±4.5V). Applications operating at the lower voltage extremes of the original specification require verification against the substitute part's minimum ratings.

The charge injection specification differs (60pC versus 10pC), which may impact precision analog switching applications with stringent charge injection requirements. This parameter should be evaluated against specific application tolerances.

Frequently Asked Questions (FAQ)

Q: Can the DG405DJ-E3 replace the DG405CJ in existing designs?

A: Yes, the DG405DJ-E3 is a direct functional substitute. Both components feature identical switch circuit configuration (DPST-NO), 2:1 multiplexer topology, 45Ohm on-state resistance, and 16-DIP package. No PCB modifications are required for pin-compatible replacement.

Q: What are the key differences between these parts?

A: The primary differences are product status (DG405CJ is obsolete; DG405DJ-E3 is active), operating temperature range (DG405DJ-E3 extends to -40°C and 85°C), RoHS compliance (DG405DJ-E3 is ROHS3 compliant), and charge injection specification (DG405DJ-E3 is 60pC versus 10pC for DG405CJ). Supply voltage ranges differ slightly at the lower limits.

Q: Are there supply voltage compatibility concerns?

A: The DG405DJ-E3 specifies minimum single supply voltage of 13V (versus 10V for DG405CJ) and minimum dual supply voltage of ±7V (versus ±4.5V for DG405CJ). Applications operating at the lower voltage extremes require confirmation that the substitute part meets system requirements.

Q: Does the higher charge injection of the DG405DJ-E3 affect performance?

A: Charge injection differences (60pC versus 10pC) may impact precision analog switching applications. Applications sensitive to charge injection should evaluate whether the substitute part's specification remains within acceptable system tolerances.

Q: Is the 16-DIP package identical between both parts?

A: Yes, both components use the 16-DIP (0.300", 7.62mm) package with through-hole mounting. Pin assignments and package dimensions are identical, enabling direct socket replacement.

Q: What is the inventory status of these parts?

A: The DG405CJ is obsolete with 999 pieces available as new original stock. The DG405DJ-E3 is an active product with 1155 pieces available as new original stock in tube packaging.

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