DG445CJ Equivalent & Substitute Parts

Part Overview

The DG445CJ is a 4-circuit SPST-NO (Single Pole Single Throw - Normally Open) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This component operates as a 1:1 multiplexer/demultiplexer with 85Ohm on-state resistance and is housed in a 16-pin DIP package for through-hole mounting. The DG445CJ is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production support.

Key Parameters

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

Substitute Part Grouping Explanation

Substitution eligibility for the DG445CJ is determined by the following critical parameters:

Primary Substitution Criteria:

Switch circuit type (SPST-NO vs. SPST-NC)
Number of circuits (4 circuits required)
Multiplexer/demultiplexer configuration (1:1)
On-state resistance compatibility (85Ohm nominal)
Package type (16-DIP through-hole)
Supply voltage range compatibility
Operating temperature range

Substitution Categories:

Direct Equivalent: Parts with identical electrical specifications and package, differing only in product status or packaging format (tube vs. bulk).

Manufacturer Recommended Substitute: Parts with superior electrical performance (lower on-state resistance, wider temperature range, improved compliance) but different switch circuit type (SPST-NC vs. SPST-NO), requiring circuit-level evaluation.

Parametric Equivalent: Parts with matching core electrical specifications and package, suitable for direct replacement in applications where product status change is acceptable.

Parameter Comparison

Parameter	DG445CJ (Main)	DG445CJ+ (Direct)	DG442CJ+ (Parametric)	MAX312EPE+ (MFR Recommended)
Manufacturer	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Product Status	Obsolete	Active	Obsolete	Active
Switch Circuit Type	SPST - NO	SPST - NO	SPST - NO	SPST - NC
Number of Circuits	4	4	4	4
Multiplexer Configuration	1:1	1:1	1:1	1:1
On-State Resistance (Max)	85Ohm	85Ohm	85Ohm	10Ohm
Channel-to-Channel Matching (ΔRon)	4Ohm (Max)	4Ohm (Max)	4Ohm (Max)	300mOhm
Supply Voltage - Single (V+)	10V ~ 30V	10V ~ 30V	10V ~ 30V	4.5V ~ 30V
Supply Voltage - Dual (V±)	±4.5V ~ 20V	±4.5V ~ 20V	±4.5V ~ 20V	±4.5V ~ 20V
Switch Time Ton (Max)	250ns	250ns	250ns	225ns
Switch Time Toff (Max)	170ns	170ns	170ns	185ns
Charge Injection	5pC	5pC	5pC	20pC
Channel Capacitance (CS(off), CD(off))	4pF, 4pF	4pF, 4pF	4pF, 4pF	15pF, 15pF
Current - Leakage (IS(off)) (Max)	500pA	500pA	500pA	500pA
Crosstalk	-100dB @ 1MHz	-100dB @ 1MHz	-100dB @ 1MHz	-85dB @ 1MHz
Operating Temperature Range	0°C ~ 70°C	0°C ~ 70°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)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	1425 Pcs New Original In Stock	1094 Pcs New Original In Stock	834 Pcs New Original In Stock	954 Pcs New Original In Stock

Engineering Selection Recommendations

DG445CJ+ (Direct Equivalent - Preferred for Active Production): DG445CJ+ is the direct equivalent with identical electrical specifications and 16-DIP through-hole package. The primary advantage is active product status, ensuring long-term availability and supply chain stability. DG445CJ+ is ROHS3 compliant, meeting modern environmental and regulatory requirements. This part is the recommended choice for new designs and production transitions from the obsolete DG445CJ.

DG442CJ+ (Parametric Equivalent - Legacy Applications): DG442CJ+ provides identical electrical performance to DG445CJ with matching on-state resistance, switching characteristics, and package configuration. However, DG442CJ+ is also classified as obsolete. This part is suitable only for applications where existing inventory must be maintained or where design constraints prevent migration to active alternatives. ROHS3 compliance is available with this part number.

MAX312EPE+ (Manufacturer Recommended - Performance Enhancement): MAX312EPE+ is recommended by Analog Devices Inc./Maxim Integrated for applications requiring superior electrical performance. Key advantages include significantly lower on-state resistance (10Ohm vs. 85Ohm), improved channel-to-channel matching (300mOhm vs. 4Ohm), and extended operating temperature range (-40°C to 85°C vs. 0°C to 70°C). MAX312EPE+ is active and ROHS3 compliant. The critical difference is switch circuit type: MAX312EPE+ is SPST-NC (Normally Closed) versus DG445CJ's SPST-NO (Normally Open). Circuit-level redesign is required to accommodate this functional difference. MAX312EPE+ is suitable for new designs where the normally-closed configuration is compatible with system requirements.

Frequently Asked Questions (FAQ)

Q: Can DG445CJ+ be used as a direct replacement for DG445CJ? A: Yes. DG445CJ+ is a direct equivalent with identical electrical specifications, package type (16-DIP through-hole), and functional characteristics. The primary difference is product status: DG445CJ+ is active while DG445CJ is obsolete. DG445CJ+ is the recommended choice for production transitions.

Q: What is the key difference between DG445CJ and MAX312EPE+? A: The primary functional difference is switch circuit type: DG445CJ is SPST-NO (Normally Open), while MAX312EPE+ is SPST-NC (Normally Closed). Additionally, MAX312EPE+ offers superior electrical performance with 10Ohm on-state resistance versus 85Ohm, improved matching characteristics, and wider operating temperature range (-40°C to 85°C). Circuit-level evaluation is required before substitution.

Q: Is DG442CJ+ suitable for new production designs? A: DG442CJ+ is not recommended for new production designs. Although it provides identical electrical specifications to DG445CJ, DG442CJ+ is classified as obsolete. DG445CJ+ is the preferred active alternative with the same electrical performance and package configuration.

Q: Are all substitute parts available in the same 16-DIP through-hole package? A: Yes. DG445CJ+, DG442CJ+, and MAX312EPE+ are all housed in 16-DIP (0.300", 7.62mm) through-hole packages, ensuring mechanical compatibility with existing PCB designs.

Q: What are the RoHS compliance differences? A: DG445CJ is RoHS non-compliant. All substitute parts (DG445CJ+, DG442CJ+, and MAX312EPE+) are ROHS3 compliant, meeting current environmental and regulatory standards for new production.

Q: Can MAX312EPE+ be used in applications designed for DG445CJ without circuit modifications? A: No. MAX312EPE+ requires circuit-level evaluation due to its SPST-NC (Normally Closed) configuration versus DG445CJ's SPST-NO (Normally Open) type. Applications must be redesigned to accommodate the normally-closed switching behavior. Additionally, the significantly lower on-state resistance (10Ohm vs. 85Ohm) may require impedance matching adjustments in signal path designs.

Q: What is the supply voltage compatibility between DG445CJ and its substitutes? A: DG445CJ, DG445CJ+, and DG442CJ+ support identical supply voltage ranges: 10V ~ 30V (single supply) and ±4.5V ~ 20V (dual supply). MAX312EPE+ offers wider single supply compatibility (4.5V ~ 30V) while maintaining the same dual supply range, providing greater flexibility in low-voltage applications.

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