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 component 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 characteristics.

Key Parameters

Parameter	Value
Switch Circuit Type	SPST - NO (Single Pole Single Throw - Normally Open)
Number of Circuits	4
Multiplexer/Demultiplexer Configuration	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 - Turn On (Ton)	250ns (Max)
Switch Time - Turn Off (Toff)	170ns (Max)
Charge Injection	5pC
Channel Capacitance - Switch Off (CS(off))	4pF
Channel Capacitance - Drain Off (CD(off))	4pF
Current - Leakage (IS(off)) (Max)	500pA
Crosstalk	-100dB @ 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
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of 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 configuration: 1:1
On-state resistance: 85Ohm (primary criterion)
Package type: 16-DIP (0.300", 7.62mm)
Mounting type: Through Hole

Acceptable Variation Ranges:

Supply voltage ranges may differ, provided the substitute operates within the application's required voltage window
Switch timing parameters (Ton, Toff) may vary within acceptable application limits
Charge injection and capacitance values may differ slightly without affecting core functionality
Operating temperature range may be extended (wider is acceptable)
RoHS compliance status may differ between original and substitute

The substitute parts are grouped into three categories based on their relationship to the DG442CJ:

Direct Manufacturer Substitutes - Identical electrical specifications with packaging or compliance variations
Parametric Equivalents - Functionally equivalent with active product status
Manufacturer-Recommended Alternatives - Parts with modified specifications suitable for specific application requirements

Parameter Comparison

Parameter	DG442CJ	DG442CJ+	DG445CJ+	ADG442BNZ	ALD4202MPCL	DG442DJ-E3
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc.	Advanced Linear Devices Inc.	Vishay Siliconix
Product Status	Obsolete	Obsolete	Active	Active	Active	Active
Switch Circuit	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO	SPST - NO
Number of Circuits	4	4	4	4	4	4
On-State Resistance (Max)	85Ohm	85Ohm	85Ohm	70Ohm	135Ohm	85Ohm
Channel-to-Channel Matching (ΔRon)	4Ohm (Max)	4Ohm (Max)	4Ohm (Max)	Not specified	2.7Ohm	4Ohm (Max)
Voltage - Supply, Single (V+)	10V ~ 30V	10V ~ 30V	10V ~ 30V	12V	3V ~ 12V	12V
Voltage - Supply, Dual (V±)	±4.5V ~ 20V	±4.5V ~ 20V	±4.5V ~ 20V	±15V	±1.5V ~ 6V	±15V
Switch Time - Ton (Max)	250ns	250ns	250ns	110ns	240ns	250ns
Switch Time - Toff (Max)	170ns	170ns	170ns	60ns	130ns	210ns
Charge Injection	5pC	5pC	5pC	1pC	2pC	-1pC
Channel Capacitance (CS(off), CD(off))	4pF, 4pF	4pF, 4pF	4pF, 4pF	4pF, 4pF	3pF, 3pF	4pF, 4pF
Current - Leakage (IS(off)) (Max)	500pA	500pA	500pA	500pA	100pA	500pA
Crosstalk	-100dB @ 1MHz	-100dB @ 1MHz	-100dB @ 1MHz	-100dB @ 1MHz	-90dB @ 100kHz	-100dB @ 1MHz
Operating Temperature	0°C ~ 70°C	0°C ~ 70°C	0°C ~ 70°C	-40°C ~ 85°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)	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	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

DG442CJ+ is the direct substitute with identical electrical specifications. It differs only in packaging format (Tube) and RoHS3 compliance status. This part is suitable for applications requiring exact parameter matching to the original DG442CJ. However, DG442CJ+ is also classified as obsolete, limiting long-term availability.

DG445CJ+ provides identical electrical specifications to the DG442CJ with the advantage of active product status, ensuring continued availability and manufacturing support. This part is recommended for new designs and production transitions from the obsolete DG442CJ.

For Extended Temperature Range Applications:

ADG442BNZ and DG442DJ-E3 both extend the operating temperature range to -40°C ~ 85°C, suitable for industrial and automotive applications. ADG442BNZ features improved switching speed (110ns Ton, 60ns Toff) and lower charge injection (1pC), while DG442DJ-E3 maintains timing characteristics closer to the original DG442CJ. Both are RoHS3 compliant and actively manufactured.

For Low-Voltage Applications:

ALD4202MPCL operates across a lower supply voltage range (3V ~ 12V single supply, ±1.5V ~ 6V dual supply), making it suitable for battery-powered and low-voltage systems. This part features lower leakage current (100pA) and reduced charge injection (2pC). The higher on-state resistance (135Ohm) must be evaluated against application requirements.

For RoHS Compliance:

All substitute parts except DG442CJ are RoHS3 compliant, meeting environmental and regulatory requirements for new product designs and markets with RoHS mandates.

Frequently Asked Questions (FAQ)

Q: Can DG442CJ+ be used as a direct replacement for DG442CJ?

A: Yes. DG442CJ+ is electrically identical to DG442CJ with matching on-state resistance (85Ohm), supply voltage ranges, switching times, and all other critical parameters. The primary difference is RoHS3 compliance and packaging format. Both parts are obsolete, so long-term availability may be limited.

Q: What is the difference between DG445CJ+ and DG442CJ?

A: DG445CJ+ is electrically equivalent to DG442CJ with identical specifications across all critical parameters including on-state resistance, supply voltages, switching times, and package type. The key advantage is that DG445CJ+ has active product status, ensuring continued manufacturing and availability, whereas DG442CJ is obsolete.

Q: When should ADG442BNZ be selected over other substitutes?

A: ADG442BNZ is the preferred choice for applications requiring extended operating temperature range (-40°C to 85°C), improved switching performance (110ns Ton, 60ns Toff), and lower charge injection (1pC). It is suitable for industrial, automotive, and harsh environment applications. The on-state resistance remains at 85Ohm, matching the original DG442CJ.

Q: Is ALD4202MPCL suitable for all DG442CJ applications?

A: ALD4202MPCL is suitable only for applications where the higher on-state resistance (135Ohm) and lower supply voltage range (3V ~ 12V single, ±1.5V ~ 6V dual) are acceptable. It offers advantages in low-voltage and battery-powered systems with lower leakage current (100pA) and charge injection (2pC). Applications requiring the original 85Ohm resistance or higher supply voltages should use alternative substitutes.

Q: Are all substitute parts available in the same 16-DIP package?

A: Yes. All substitute parts listed are housed in 16-DIP (0.300", 7.62mm) packages with through-hole mounting, ensuring mechanical and pin-compatible replacement without PCB redesign.

Q: What is the impact of RoHS compliance on part selection?

A: RoHS3 compliance is required for products sold in markets with environmental regulations (EU, China, and others). All substitute parts except DG442CJ are RoHS3 compliant. If RoHS compliance is mandatory for your application, select from DG442CJ+, DG445CJ+, ADG442BNZ, ALD4202MPCL, or DG442DJ-E3.

Q: Can DG442DJ-E3 replace DG442CJ in all applications?

A: DG442DJ-E3 is electrically compatible with DG442CJ, maintaining 85Ohm on-state resistance, 4Ohm channel matching, and -100dB crosstalk. It extends the operating temperature range to -40°C ~ 85°C and features slightly longer turn-off time (210ns vs. 170ns). It is suitable for most applications and is actively manufactured with RoHS3 compliance.

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