DG442CJ+ Equivalent & Substitute Parts

Part Overview

The DG442CJ+ is a 4-circuit SPST-NO analog switch IC manufactured by Analog Devices Inc./Maxim Integrated, housed in a 16-DIP package with 85Ohm on-state resistance. This part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support. The DG442CJ+ operates across a wide supply voltage range (10V to 30V single supply, or ±4.5V to ±20V dual supply) and is suitable for signal routing and multiplexing applications requiring low on-state resistance and fast switching times.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO (Single Pole Single Throw - Normally Open)
Number of Circuits	4
Multiplexer/Demultiplexer Circuit	1:1
On-State Resistance (Max)	85Ohm
Channel-to-Channel Matching (ΔRon)	4Ohm (Max)
Voltage - Supply, Single (V+)	10V ~ 30V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V
Switch Time (Ton, Toff) (Max)	250ns, 170ns
Charge Injection	5pC
Channel Capacitance (CS(off), CD(off))	4pF, 4pF
Current - Leakage (IS(off)) (Max)	500pA
Crosstalk	-100dB @ 1MHz
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	16-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the DG442CJ+ is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

Switch circuit type: SPST - NO
Number of circuits: 4
Multiplexer/Demultiplexer circuit: 1:1
Package type: 16-DIP (0.300", 7.62mm)
On-state resistance: 85Ohm (primary criterion)
Supply voltage compatibility: Must support the application's required voltage range
Operating temperature range: Must meet or exceed the application requirement

Substitute Categories:

Direct Equivalent (Parametric Match): DG445CJ+ maintains identical electrical specifications to the DG442CJ+, including 85Ohm on-state resistance, matching channel-to-channel resistance, and identical switching characteristics. The primary distinction is product status: DG445CJ+ is active, whereas DG442CJ+ is obsolete.

Manufacturer Recommended Alternatives: ADG442BNZ and DG442DJ-E3 are manufacturer-recommended substitutes that maintain the 85Ohm on-state resistance and 4-circuit SPST-NO configuration. These parts differ in supply voltage specifications and operating temperature ranges, requiring verification against application requirements.

Parametric Equivalent (Functional Substitute): ALD4202MPCL provides 4-circuit SPST-NO switching in the same 16-DIP package but with different electrical characteristics (135Ohm on-state resistance, lower supply voltage range, improved leakage current performance). This part is suitable only for applications where the higher on-state resistance is acceptable.

Parameter Comparison

Parameter	DG442CJ+	DG445CJ+	ADG442BNZ	DG442DJ-E3	ALD4202MPCL
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc.	Vishay Siliconix	Advanced Linear Devices Inc.
Product Status	Obsolete	Active	Active	Active	Active
Switch Circuit	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	4	4	4	4	4
On-State Resistance (Max)	85Ohm	85Ohm	70Ohm	85Ohm	135Ohm
Channel-to-Channel Matching (ΔRon)	4Ohm (Max)	4Ohm (Max)	-	4Ohm (Max)	2.7Ohm
Voltage - Supply, Single (V+)	10V ~ 30V	10V ~ 30V	12V	12V	3V ~ 12V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±4.5V ~ 20V	±15V	±15V	±1.5V ~ 6V
Switch Time Ton (Max)	250ns	250ns	110ns	250ns	240ns
Switch Time Toff (Max)	170ns	170ns	60ns	210ns	130ns
Charge Injection	5pC	5pC	1pC	-1pC	2pC
Channel Capacitance (CS(off), CD(off))	4pF, 4pF	4pF, 4pF	4pF, 4pF	4pF, 4pF	3pF, 3pF
Current - Leakage (IS(off)) (Max)	500pA	500pA	500pA	500pA	100pA
Crosstalk	-100dB @ 1MHz	-100dB @ 1MHz	-100dB @ 1MHz	-100dB @ 1MHz	-90dB @ 100kHz
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	0°C ~ 70°C (TA)
Package / Case	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Preferred): DG445CJ+ is the optimal substitute for the obsolete DG442CJ+. It maintains identical electrical specifications and package configuration while offering active product status and current manufacturing support. All compliance certifications (ROHS3, REACH Unaffected, EAR99) are equivalent.

For Extended Temperature Range Applications: DG442DJ-E3 (Vishay Siliconix) and ADG442BNZ (Analog Devices Inc.) both extend the operating temperature range to -40°C ~ 85°C, suitable for industrial and automotive applications. DG442DJ-E3 maintains the 85Ohm on-state resistance specification. ADG442BNZ offers improved switching speed (110ns Ton, 60ns Toff) and reduced charge injection (1pC) but operates at fixed supply voltages (12V single, ±15V dual) rather than the wide range of the original part.

For Low-Voltage Applications: ALD4202MPCL operates across 3V ~ 12V single supply or ±1.5V ~ 6V dual supply, making it suitable for battery-powered and low-voltage systems. The higher on-state resistance (135Ohm) and lower crosstalk specification (-90dB @ 100kHz) require application-level verification of signal integrity requirements.

All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and EAR99 classification, ensuring regulatory and supply chain compatibility with the original DG442CJ+.

Frequently Asked Questions (FAQ)

Q: Can DG445CJ+ be used as a direct drop-in replacement for DG442CJ+? A: Yes. DG445CJ+ is electrically and mechanically identical to DG442CJ+, with the same 85Ohm on-state resistance, 4-circuit SPST-NO configuration, 16-DIP package, and supply voltage specifications. The primary difference is product status: DG445CJ+ is active and currently manufactured, whereas DG442CJ+ is obsolete.

Q: What is the key difference between ADG442BNZ and DG442DJ-E3? A: Both parts maintain the 85Ohm on-state resistance and extend operating temperature to -40°C ~ 85°C. ADG442BNZ (Analog Devices) offers faster switching times (110ns Ton, 60ns Toff) and lower charge injection (1pC), while DG442DJ-E3 (Vishay Siliconix) maintains the original switching characteristics (250ns Ton, 210ns Toff). Supply voltage specifications differ: ADG442BNZ operates at fixed 12V single or ±15V dual supply, while DG442DJ-E3 also operates at fixed 12V single or ±15V dual supply.

Q: Can ALD4202MPCL replace DG442CJ+ in all applications? A: ALD4202MPCL is a functional substitute only for applications where the higher on-state resistance (135Ohm versus 85Ohm) is acceptable. The lower supply voltage range (3V ~ 12V single, ±1.5V ~ 6V dual) limits its use to low-voltage systems. The crosstalk specification (-90dB @ 100kHz) is lower than the original part (-100dB @ 1MHz), requiring verification against signal integrity requirements.

Q: Are all substitute parts RoHS compliant? A: Yes. All substitute parts listed (DG445CJ+, ADG442BNZ, DG442DJ-E3, and ALD4202MPCL) are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating, matching the original DG442CJ+ compliance profile.

Q: What supply voltage range should I verify when selecting a substitute? A: The original DG442CJ+ operates across 10V ~ 30V single supply or ±4.5V ~ 20V dual supply. DG445CJ+ maintains this range. ADG442BNZ and DG442DJ-E3 operate at fixed 12V single or ±15V dual supply. ALD4202MPCL operates at 3V ~ 12V single or ±1.5V ~ 6V dual supply. Verify that the substitute part's supply voltage range encompasses your application's requirements.

Q: Does package compatibility require any PCB layout changes? A: No. All substitute parts use the same 16-DIP (0.300", 7.62mm) package as the DG442CJ+, requiring no PCB layout modifications. Pin-to-pin compatibility is maintained across all listed substitutes.

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