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MAX305CPE+ Equivalent & Substitute Parts
Part Overview
The MAX305CPE+ is a 2-circuit IC switch manufactured by Analog Devices Inc./Maxim Integrated, configured as a DPST-NO (Dual Pole Single Throw - Normally Open) multiplexer/demultiplexer with 2:1 switching capability. This component operates across single supply voltages of 10V to 30V or dual supply voltages of ±4.5V to ±20V, with an on-state resistance of 35Ohm maximum. The device is actively produced and widely stocked (1139 pcs available), making it suitable for signal routing and switching applications in industrial and commercial electronics. Alternative components may be required when supply voltage ranges, operating temperature specifications, or specific electrical characteristics differ from application requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | MAX305CPE+ |
| Manufacturer | Analog Devices Inc./Maxim Integrated |
| Category | Interface |
| Switch Circuit Configuration | DPST - NO |
| Multiplexer/Demultiplexer Circuit | 2:1 |
| Number of Circuits | 2 |
| On-State Resistance (Max) | 35Ohm |
| Channel-to-Channel Matching (ΔRon) | 500mOhm |
| Voltage - Supply, Single (V+) | 10V ~ 30V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V |
| Switch Time (Ton, Toff) (Max) | 150ns, 100ns |
| Charge Injection | 10pC |
| Channel Capacitance (CS(off), CD(off)) | 12pF, 12pF |
| Current - Leakage (IS(off)) (Max) | 500pA |
| Crosstalk | -90dB @ 1MHz |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Package / Case | 16-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole |
| Product Status | Active |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX305CPE+ is determined by strict alignment with the following critical parameters:
Mandatory Matching Criteria:
- Switch circuit configuration: DPST - NO
- Multiplexer/demultiplexer circuit: 2:1
- Number of circuits: 2
- Package / Case: 16-DIP (0.300", 7.62mm)
- Mounting type: Through Hole
- Supplier device package: 16-PDIP
Allowable Parameter Variations:
- On-state resistance (Max): May exceed 35Ohm if application tolerates higher resistance
- Voltage supply ranges: May be broader than the original specification
- Operating temperature range: May be broader than 0°C ~ 70°C
- Charge injection: May differ from 10pC
- Channel-to-channel matching (ΔRon): May vary or be unspecified
The DG405DJ-E3 manufactured by Vishay Siliconix qualifies as a substitute based on matching core switching architecture, circuit configuration, and physical package specifications, despite variations in on-state resistance (45Ohm vs. 35Ohm), supply voltage ranges, operating temperature range (-40°C ~ 85°C), and charge injection (60pC vs. 10pC).
Parameter Comparison
| Parameter | MAX305CPE+ (Main Part) | DG405DJ-E3 (Substitute) |
|---|---|---|
| Manufacturer | Analog Devices Inc./Maxim Integrated | Vishay Siliconix |
| Switch Circuit Configuration | DPST - NO | DPST - NO |
| Multiplexer/Demultiplexer Circuit | 2:1 | 2:1 |
| Number of Circuits | 2 | 2 |
| On-State Resistance (Max) | 35Ohm | 45Ohm |
| Channel-to-Channel Matching (ΔRon) | 500mOhm | Not specified |
| Voltage - Supply, Single (V+) | 10V ~ 30V | 13V ~ 36V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V | ±7V ~ 22V |
| Switch Time (Ton, Toff) (Max) | 150ns, 100ns | 150ns, 100ns |
| Charge Injection | 10pC | 60pC |
| Channel Capacitance (CS(off), CD(off)) | 12pF, 12pF | 12pF, 12pF |
| Current - Leakage (IS(off)) (Max) | 500pA | 500pA |
| Crosstalk | -90dB @ 1MHz | -90dB @ 1MHz |
| Operating Temperature | 0°C ~ 70°C (TA) | -40°C ~ 85°C (TA) |
| Package / Case | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) |
| Mounting Type | Through Hole | Through Hole |
| Product Status | Active | Active |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant |
Engineering Selection Recommendations
Both the MAX305CPE+ and DG405DJ-E3 are active products with ROHS3 compliance and identical moisture sensitivity levels (MSL 1 - Unlimited), ensuring regulatory and environmental compatibility for equivalent applications.
The MAX305CPE+ is the primary selection when on-state resistance must not exceed 35Ohm and charge injection must remain at 10pC or lower. This component is suitable for applications requiring precise impedance matching and minimal signal distortion in low-charge-injection environments.
The DG405DJ-E3 serves as a functional substitute when the application can tolerate an on-state resistance of 45Ohm and charge injection of 60pC. The DG405DJ-E3 offers an extended operating temperature range (-40°C ~ 85°C) compared to the MAX305CPE+ (0°C ~ 70°C), making it suitable for industrial and automotive environments requiring broader temperature performance. The DG405DJ-E3 also supports higher single supply voltages (up to 36V vs. 30V) and higher dual supply voltages (±22V vs. ±20V).
Both components maintain identical switch timing (150ns, 100ns), channel capacitance (12pF, 12pF), leakage current (500pA), and crosstalk performance (-90dB @ 1MHz), ensuring signal integrity characteristics remain consistent across substitution.
Frequently Asked Questions (FAQ)
Q: Can the DG405DJ-E3 replace the MAX305CPE+ in all applications?
A: The DG405DJ-E3 qualifies as a substitute only when the application can accommodate the higher on-state resistance (45Ohm vs. 35Ohm) and increased charge injection (60pC vs. 10pC). Applications with strict impedance or signal distortion requirements may not be compatible with the DG405DJ-E3.
Q: What are the key differences between these two parts?
A: The primary differences are on-state resistance (35Ohm vs. 45Ohm), charge injection (10pC vs. 60pC), operating temperature range (0°C ~ 70°C vs. -40°C ~ 85°C), and supply voltage ranges. Switch timing, channel capacitance, leakage current, and crosstalk performance are identical.
Q: Are both parts available in the same package?
A: Yes. Both the MAX305CPE+ and DG405DJ-E3 are packaged in 16-DIP (0.300", 7.62mm) through-hole format with identical pinout compatibility, allowing direct board-level substitution without layout modifications.
Q: Which part should I select for extended temperature operation?
A: The DG405DJ-E3 supports operating temperatures from -40°C to 85°C, compared to the MAX305CPE+ range of 0°C to 70°C. Select the DG405DJ-E3 for applications requiring operation below 0°C or above 70°C.
Q: Are both parts RoHS compliant?
A: Yes. Both the MAX305CPE+ and DG405DJ-E3 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity levels, meeting current environmental and regulatory requirements.
Q: What is the impact of higher on-state resistance in the DG405DJ-E3?
A: The 45Ohm on-state resistance of the DG405DJ-E3 compared to 35Ohm in the MAX305CPE+ results in increased voltage drop across the switch during signal transmission. Applications sensitive to impedance matching or requiring minimal signal attenuation should verify compatibility before substitution.
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