DG390ACJ Equivalent & Substitute Parts

Part Overview

The DG390ACJ is a dual-circuit SPDT (Single Pole Double Throw) analog switch IC manufactured by Analog Devices Inc./Maxim Integrated. This 14-DIP through-hole component provides two independent 2:1 multiplexer/demultiplexer circuits with 50Ω on-state resistance, designed for precision signal routing applications in analog systems.

The DG390ACJ is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support legacy system maintenance and production requirements.

Substiute Parts

DG390ACJ

Analog Devices Inc./Maxim IntegratedIn Stock: 951DG390ACJ Datasheet

Current PartRFQ

DG301ACJ+

Analog Devices Inc./Maxim IntegratedIn Stock: 1273DG301ACJ+ Datasheet

Parametric EquivalentRFQ

DG303ACJ+

Analog Devices Inc./Maxim IntegratedIn Stock: 1697DG303ACJ+ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DG390ACJ is determined by the following critical parameters:

• Switch Circuit Type: Must be SPDT
• Multiplexer/Demultiplexer Configuration: Must be 2:1
• On-State Resistance: Must be 50Ω (maximum)
• Dual Supply Voltage Range: Must support ±5V ~ ±18V
• Switch Timing: Must meet or exceed 300ns (Ton) and 250ns (Toff) specifications
• Charge Injection: Must be 12pC or lower
• Channel Capacitance: Must be 14pF or lower for both CS(off) and CD(off)
• Leakage Current: Must be 5nA or lower
• Crosstalk: Must be -74dB or better @ 500kHz
• Operating Temperature: Must support 0°C ~ 70°C range
• Package / Case: Must be 14-DIP (0.300", 7.62mm)
• Mounting Type: Must be Through Hole

Two substitute parts meet these criteria:

1. DG303ACJ+: Dual-circuit configuration (2 circuits) matching the DG390ACJ circuit count. All electrical and mechanical parameters are identical. Product status is Active with RoHS3 compliance.

2. DG301ACJ+: Single-circuit configuration (1 circuit) with identical electrical specifications per circuit. This part provides functional equivalence for applications requiring only one SPDT 2:1 switch. Product status is Active with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

DG303ACJ+ is the primary substitute for direct replacement of the DG390ACJ. Both parts provide identical dual-circuit SPDT 2:1 switch functionality with matching electrical specifications. The DG303ACJ+ is currently in active production status with RoHS3 compliance, addressing the obsolescence of the DG390ACJ while maintaining full electrical and mechanical compatibility. The 14-DIP through-hole package and pinout are identical, enabling direct board-level substitution.

DG301ACJ+ serves as a functional equivalent for applications requiring only a single SPDT 2:1 switch circuit. This part is suitable for designs where dual-circuit capability is not required. The DG301ACJ+ provides identical per-circuit electrical performance and is also in active production with RoHS3 compliance. Circuit count reduction may require design modification depending on application requirements.

Both substitute parts are manufactured by the same supplier (Analog Devices Inc./Maxim Integrated) and maintain the same supply voltage range, switching characteristics, and thermal operating window as the obsolete DG390ACJ.

Frequently Asked Questions (FAQ)

Q: Can the DG303ACJ+ directly replace the DG390ACJ without PCB modification?

A: Yes. The DG303ACJ+ provides identical electrical specifications, circuit count (2 SPDT 2:1 switches), and 14-DIP through-hole package dimensions. Direct pin-for-pin substitution is supported.

Q: When should the DG301ACJ+ be used instead of the DG303ACJ+?

A: The DG301ACJ+ is appropriate for applications requiring only one SPDT 2:1 switch circuit. If your design uses only one of the two switch circuits in the DG390ACJ, the DG301ACJ+ provides equivalent functionality in a single-circuit configuration. PCB layout modification may be necessary.

Q: Are there differences in supply voltage requirements between these parts?

A: No. All three parts (DG390ACJ, DG303ACJ+, and DG301ACJ+) operate with identical dual supply voltage range: ±5V ~ ±18V.

Q: What is the significance of the RoHS compliance difference?

A: The DG390ACJ is RoHS non-compliant, while both substitute parts (DG303ACJ+ and DG301ACJ+) are RoHS3 compliant. This compliance status is relevant for applications subject to RoHS regulations and environmental standards.

Q: Do the substitute parts have identical switching speed and timing characteristics?

A: Yes. All three parts share identical switch timing specifications: Ton (max) = 300ns, Toff (max) = 250ns, charge injection = 12pC, and crosstalk = -74dB @ 500kHz.

Q: Is the 14-DIP package identical across all three parts?

A: Yes. All parts use the same 14-DIP (0.300", 7.62mm) through-hole package with 14-PDIP supplier device package designation. Physical footprint and mounting requirements are identical.

Q: What inventory status should be considered when selecting a substitute?

A: The DG303ACJ+ has 1610 pieces in stock and the DG301ACJ+ has 1203 pieces in stock, both in active production. The DG390ACJ (909 pieces) is obsolete and no longer manufactured.