DG409DJ Equivalent & Substitute Parts

Part Overview

The DG409DJ is a dual 4:1 analog switch IC manufactured by Analog Devices Inc./Maxim Integrated, designed for signal routing and multiplexing applications. This component features SP4T (Single Pole, 4-Throw) switching architecture with 100Ohm on-state resistance and operates across a wide supply voltage range of 5V to 30V (single supply) or ±5V to ±20V (dual supply). The DG409DJ is classified as obsolete, making identification of compatible alternatives essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Switch Circuit Configuration	SP4T (Single Pole, 4-Throw)
Multiplexer/Demultiplexer Circuit	4:1
Number of Circuits	2
On-State Resistance (Max)	100Ohm
Channel-to-Channel Matching (ΔRon)	1.5Ohm
Voltage - Supply, Single (V+)	5V ~ 30V
Voltage - Supply, Dual (V±)	±5V ~ ±20V
Switch Time (Ton, Toff) (Max)	150ns, 150ns
Charge Injection	2pC
Channel Capacitance (CS(off), CD(off))	3pF, 14pF
Current - Leakage (IS(off)) (Max)	500pA
Crosstalk	-92dB @ 100kHz
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Through Hole
Package / Case	16-DIP (0.300", 7.62mm)
Supplier Device Package	16-PDIP
Base Product Number	DG409

Substitute Part Grouping Explanation

Substitution eligibility for the DG409DJ is determined by strict equivalence across the following critical parameters:

Switch Architecture: SP4T configuration with 4:1 multiplexer/demultiplexer circuit
Circuit Count: Dual circuit (2 circuits per package)
On-State Resistance: 100Ohm maximum specification
Channel Matching: 1.5Ohm ΔRon tolerance
Supply Voltage Range: 5V ~ 30V (single) and ±5V ~ ±20V (dual)
Switching Performance: 150ns maximum switching time (Ton, Toff)
Electrical Characteristics: Charge injection (2pC), leakage current (500pA max), crosstalk (-92dB @ 100kHz)
Temperature Range: -40°C ~ 85°C operating specification
Package Format: 16-DIP through-hole mounting

Parts meeting all these parameters are classified as direct substitutes. Variations in product status, compliance certifications, or packaging configuration do not affect functional equivalence.

Parameter Comparison

Parameter	DG409DJ (Main Part)	DG409DJ+ (Substitute)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Switch Circuit	SP4T	SP4T
Multiplexer/Demultiplexer Circuit	4:1	4:1
Number of Circuits	2	2
On-State Resistance (Max)	100Ohm	100Ohm
Channel-to-Channel Matching (ΔRon)	1.5Ohm	1.5Ohm
Voltage - Supply, Single (V+)	5V ~ 30V	5V ~ 30V
Voltage - Supply, Dual (V±)	±5V ~ ±20V	±5V ~ ±20V
Switch Time (Ton, Toff) (Max)	150ns, 150ns	150ns, 150ns
Charge Injection	2pC	2pC
Channel Capacitance (CS(off), CD(off))	3pF, 14pF	3pF, 14pF
Current - Leakage (IS(off)) (Max)	500pA	500pA
Crosstalk	-92dB @ 100kHz	-92dB @ 100kHz
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Through Hole	Through Hole
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
Supplier Device Package	16-PDIP	16-PDIP
Base Product Number	DG409	DG409
Product Status	Obsolete	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant
Packaging Configuration	Standard	Tube

Engineering Selection Recommendations

The DG409DJ+ serves as the direct functional equivalent to the obsolete DG409DJ. Both parts share identical electrical specifications, switching characteristics, and package geometry, ensuring pin-for-pin compatibility and circuit-level interchangeability.

The primary distinction between these parts lies in product lifecycle status and regulatory compliance. The DG409DJ is classified as obsolete, while the DG409DJ+ maintains active production status. Additionally, the DG409DJ+ achieves ROHS3 compliance, whereas the original DG409DJ does not meet RoHS requirements. The DG409DJ+ is supplied in tube packaging, compared to standard packaging for the original part.

For new designs and ongoing system support, the DG409DJ+ is the appropriate selection due to its active availability and regulatory compliance posture. Existing systems currently utilizing the DG409DJ can transition to the DG409DJ+ without circuit modification or re-qualification, provided that RoHS compliance requirements are satisfied by the system-level application.

Frequently Asked Questions (FAQ)

Q: Are DG409DJ and DG409DJ+ electrically interchangeable?

A: Yes. Both parts are manufactured by Analog Devices Inc./Maxim Integrated and share identical electrical specifications, including on-state resistance (100Ohm), switching time (150ns), supply voltage range (5V ~ 30V single, ±5V ~ ±20V dual), and all signal integrity parameters. Pin-for-pin substitution is supported without circuit modification.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: The DG409DJ is classified as obsolete and is no longer in active production. The DG409DJ+ maintains active production status, ensuring continued availability for procurement and supply chain continuity. For new designs and long-term system support, the active DG409DJ+ is the recommended selection.

Q: Does the RoHS compliance difference affect functional compatibility?

A: No. RoHS compliance is a regulatory and environmental requirement, not a functional specification. Both parts perform identically in circuit operation. However, system-level RoHS compliance requirements may necessitate selection of the DG409DJ+ to satisfy regulatory obligations.

Q: Are there package compatibility considerations between these parts?

A: Both parts utilize 16-DIP (0.300", 7.62mm) through-hole packaging with identical pinout and mechanical dimensions. The DG409DJ+ is supplied in tube packaging, while the DG409DJ uses standard packaging. This difference does not affect circuit-level compatibility or PCB mounting procedures.

Q: Can the DG409DJ+ be used as a direct replacement in existing systems?

A: Yes. The DG409DJ+ is a direct functional equivalent with identical electrical performance and package geometry. Existing systems utilizing the DG409DJ can transition to the DG409DJ+ without circuit redesign, re-layout, or functional re-qualification.

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