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MAX4535CSD Equivalent & Substitute Parts
Part Overview
The MAX4535CSD is a 2-circuit IC switch with DPST-NO configuration and 400Ohm on-state resistance, manufactured by Analog Devices Inc./Maxim Integrated. This component is classified as obsolete, which necessitates identification of active equivalent parts for new designs and ongoing production requirements. The part is housed in a 14-SOIC surface mount package and operates across a wide supply voltage range, making it suitable for analog switching applications requiring low on-state resistance and minimal crosstalk.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Switch Circuit Configuration | DPST - NO |
| Multiplexer/Demultiplexer Circuit | 2:1 |
| Number of Circuits | 2 |
| On-State Resistance (Max) | 400Ohm |
| Channel-to-Channel Matching (ΔRon) | 2Ohm |
| Voltage - Supply, Single (V+) | 9V ~ 36V |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V |
| Switch Time (Ton, Toff) (Max) | 275ns, 200ns |
| Charge Injection | 1pC |
| Channel Capacitance (CS(off), CD(off)) | 5pF, 4pF |
| Current - Leakage (IS(off)) (Max) | 500pA |
| Crosstalk | -53dB @ 1MHz |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution of the MAX4535CSD is based on electrical and mechanical parameter equivalence. The primary substitute, MAX4535ESD+, maintains identical electrical specifications across all critical switching parameters: DPST-NO circuit configuration, 2:1 multiplexer function, 400Ohm on-state resistance, channel matching of 2Ohm, supply voltage ranges, switching times, charge injection, capacitance values, leakage current, and crosstalk performance. Both parts utilize the same 14-SOIC package with identical physical dimensions and surface mount mounting type.
The key differentiator is product status and compliance certification. The MAX4535ESD+ is an active product with extended operating temperature range (-40°C ~ 85°C versus 0°C ~ 70°C) and RoHS3 compliance, whereas the MAX4535CSD is obsolete and RoHS non-compliant. Packaging differs in that MAX4535ESD+ is supplied in tube format.
Parameter Comparison
| Parameter | MAX4535CSD | MAX4535ESD+ | Compatibility |
|---|---|---|---|
| Switch Circuit | DPST - NO | DPST - NO | Identical |
| Multiplexer/Demultiplexer Circuit | 2:1 | 2:1 | Identical |
| Number of Circuits | 2 | 2 | Identical |
| On-State Resistance (Max) | 400Ohm | 400Ohm | Identical |
| Channel-to-Channel Matching (ΔRon) | 2Ohm | 2Ohm | Identical |
| Voltage - Supply, Single (V+) | 9V ~ 36V | 9V ~ 36V | Identical |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 20V | ±4.5V ~ 20V | Identical |
| Switch Time (Ton, Toff) (Max) | 275ns, 200ns | 275ns, 200ns | Identical |
| Charge Injection | 1pC | 1pC | Identical |
| Channel Capacitance (CS(off), CD(off)) | 5pF, 4pF | 5pF, 4pF | Identical |
| Current - Leakage (IS(off)) (Max) | 500pA | 500pA | Identical |
| Crosstalk | -53dB @ 1MHz | -53dB @ 1MHz | Identical |
| Operating Temperature | 0°C ~ 70°C | -40°C ~ 85°C | Extended range |
| Package / Case | 14-SOIC (0.154", 3.90mm Width) | 14-SOIC (0.154", 3.90mm Width) | Identical |
| Mounting Type | Surface Mount | Surface Mount | Identical |
| RoHS Status | RoHS non-compliant | RoHS3 Compliant | Improved compliance |
| Product Status | Obsolete | Active | Active alternative |
Engineering Selection Recommendations
The MAX4535ESD+ is the direct functional equivalent for MAX4535CSD applications. Selection of MAX4535ESD+ is supported by:
Electrical equivalence across all switching parameters, enabling direct functional replacement without circuit redesign.
Active product status, ensuring long-term availability and manufacturing support.
RoHS3 compliance, meeting current environmental and regulatory requirements for new designs and production.
Extended operating temperature range (-40°C ~ 85°C), providing broader environmental operating conditions compared to the obsolete part.
Identical 14-SOIC package and surface mount configuration, allowing direct PCB layout compatibility.
Frequently Asked Questions (FAQ)
Q: Can MAX4535ESD+ be used as a direct replacement for MAX4535CSD in existing designs?
A: Yes. Both parts share identical electrical specifications for switching function, on-state resistance, supply voltage ranges, switching times, and package configuration. PCB layout and circuit connections require no modification.
Q: What is the primary reason to transition from MAX4535CSD to MAX4535ESD+?
A: MAX4535CSD is obsolete. MAX4535ESD+ is an active product with extended temperature range and RoHS3 compliance, ensuring continued availability and regulatory compliance for new and ongoing production.
Q: Are there packaging differences between these parts?
A: Both parts use 14-SOIC surface mount packages with identical physical dimensions (0.154" width, 3.90mm). MAX4535ESD+ is supplied in tube packaging format.
Q: Does the extended operating temperature range of MAX4535ESD+ affect circuit performance?
A: The extended range (-40°C ~ 85°C for MAX4535ESD+ versus 0°C ~ 70°C for MAX4535CSD) provides broader environmental capability. All electrical parameters remain identical within the overlapping temperature range.
Q: Is RoHS3 compliance a functional requirement for substitution?
A: RoHS3 compliance is a regulatory and environmental requirement for new designs and production in most markets. MAX4535ESD+ meets this requirement, while MAX4535CSD does not.
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