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MAX389CPN Equivalent & Substitute Parts
Part Overview
The MAX389CPN 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 3kΩ on-state resistance and operates across a dual supply voltage range of ±4.5V to ±18V. The MAX389CPN is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.
Substiute Parts
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) | 3kΩ |
| Channel-to-Channel Matching (ΔRon) | 300Ω |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 18V |
| Switch Time (Ton, Toff) (Max) | 1.5µs, 1µs |
| Charge Injection | 55pC |
| Channel Capacitance (CS(off), CD(off)) | 5pF, 25pF |
| Current - Leakage (IS(off)) (Max) | 500pA |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Mounting Type | Through Hole |
| Package / Case | 18-DIP (0.300", 7.62mm) |
| Supplier Device Package | 18-PDIP |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX389CPN 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)
- Electrical Performance: On-state resistance of 3kΩ maximum with 300Ω channel-to-channel matching tolerance
- Supply Voltage: Dual supply operation within ±4.5V to ±18V range
- Switching Dynamics: Maximum switch times of 1.5µs (Ton) and 1µs (Toff)
- Signal Integrity Parameters: Charge injection of 55pC, channel capacitance specifications of 5pF (CS(off)) and 25pF (CD(off)), and leakage current maximum of 500pA
- Physical Form Factor: 18-DIP through-hole package with 0.300" (7.62mm) pitch
- Operating Temperature Range: 0°C to 70°C ambient temperature specification
The MAX389CPN+ qualifies as a direct substitute based on identical electrical specifications and package configuration. The primary distinction is product status and compliance certification.
Parameter Comparison
| Parameter | MAX389CPN | MAX389CPN+ |
|---|---|---|
| Switch Circuit | SP4T | SP4T |
| Multiplexer/Demultiplexer Circuit | 4:1 | 4:1 |
| Number of Circuits | 2 | 2 |
| On-State Resistance (Max) | 3kΩ | 3kΩ |
| Channel-to-Channel Matching (ΔRon) | 300Ω | 300Ω |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 18V | ±4.5V ~ 18V |
| Switch Time (Ton, Toff) (Max) | 1.5µs, 1µs | 1.5µs, 1µs |
| Charge Injection | 55pC | 55pC |
| Channel Capacitance (CS(off), CD(off)) | 5pF, 25pF | 5pF, 25pF |
| Current - Leakage (IS(off)) (Max) | 500pA | 500pA |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Mounting Type | Through Hole | Through Hole |
| Package / Case | 18-DIP (0.300", 7.62mm) | 18-DIP (0.300", 7.62mm) |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The MAX389CPN+ serves as the direct functional equivalent to the MAX389CPN for all electrical and mechanical applications. Both parts maintain identical switching characteristics, supply voltage specifications, and package form factors.
The MAX389CPN+ is the preferred selection for new designs and ongoing production due to its active product status and ROHS3 compliance certification. The MAX389CPN, classified as obsolete, is suitable only for legacy system maintenance where existing inventory is available and RoHS compliance is not a design requirement.
Both parts carry REACH Unaffected status and EAR99 export classification. The choice between these parts should be based on product lifecycle requirements, regulatory compliance mandates, and component availability.
Frequently Asked Questions (FAQ)
Q: Can MAX389CPN+ directly replace MAX389CPN in existing designs?
A: Yes. The MAX389CPN+ provides identical electrical performance and package compatibility. Both parts feature SP4T switching architecture, 3kΩ on-state resistance, dual supply operation (±4.5V to ±18V), and 18-DIP through-hole packaging. No circuit modifications are required.
Q: What is the primary difference between MAX389CPN and MAX389CPN+?
A: The MAX389CPN+ is an active product with ROHS3 compliance, while the MAX389CPN is obsolete and RoHS non-compliant. Electrical specifications and package form factors are identical.
Q: Are there packaging differences between these parts?
A: The MAX389CPN is supplied in standard packaging, while the MAX389CPN+ is supplied in tube packaging. Both use the 18-PDIP package format with identical pin configuration and mechanical dimensions (0.300", 7.62mm pitch).
Q: What supply voltage range do these parts support?
A: Both the MAX389CPN and MAX389CPN+ operate with dual supply voltages ranging from ±4.5V to ±18V, supporting symmetric bipolar supply configurations.
Q: Are these parts suitable for high-speed signal switching applications?
A: Both parts support maximum switch times of 1.5µs (Ton) and 1µs (Toff) with charge injection of 55pC. These specifications define the switching performance envelope for signal routing applications within the specified operating temperature range of 0°C to 70°C.
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