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MAX4544CSA Equivalent & Substitute Parts
Part Overview
The MAX4544CSA is a single-circuit SPDT (Single Pole Double Throw) analog switch manufactured by Analog Devices Inc./Maxim Integrated. This component functions as a 2:1 multiplexer/demultiplexer with 60Ohm on-state resistance, designed for signal routing applications in analog and mixed-signal systems. The MAX4544CSA is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Switch Circuit Type | SPDT |
| Multiplexer/Demultiplexer Configuration | 2:1 |
| Number of Circuits | 1 |
| On-State Resistance (Max) | 60Ohm |
| Channel-to-Channel Matching (ΔRon) | 800mOhm |
| Supply Voltage Range (Single) | 2.7V ~ 12V |
| Switch Time (Ton/Toff Max) | 100ns / 75ns |
| Charge Injection | 1pC |
| Channel Capacitance (CS(off)/CD(off)) | 8pF / 8pF |
| Leakage Current (IS(off) Max) | 100pA |
| Crosstalk | -90dB @ 1MHz |
| Operating Temperature Range | 0°C ~ 70°C |
| Package Type | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX4544CSA is determined by strict equivalence across the following critical parameters:
- Switch topology: SPDT configuration with 2:1 multiplexer/demultiplexer function
- Electrical performance: 60Ohm on-state resistance, 800mOhm channel matching, 100ns/75ns switching times
- Signal integrity: 1pC charge injection, 8pF channel capacitance, -90dB crosstalk at 1MHz
- Power supply: 2.7V to 12V single supply operation
- Package: 8-SOIC surface mount form factor
- Thermal range: 0°C to 70°C operating temperature
The MAX4544CSA+ meets all these criteria and is therefore a direct functional equivalent. The primary distinction is product status and compliance certification, not electrical or mechanical performance.
Parameter Comparison
| Parameter | MAX4544CSA | MAX4544CSA+ |
|---|---|---|
| Switch Circuit | SPDT | SPDT |
| Multiplexer Configuration | 2:1 | 2:1 |
| Number of Circuits | 1 | 1 |
| On-State Resistance (Max) | 60Ohm | 60Ohm |
| Channel-to-Channel Matching (ΔRon) | 800mOhm | 800mOhm |
| Supply Voltage (Single) | 2.7V ~ 12V | 2.7V ~ 12V |
| Switch Time (Ton/Toff Max) | 100ns / 75ns | 100ns / 75ns |
| Charge Injection | 1pC | 1pC |
| Channel Capacitance (CS(off)/CD(off)) | 8pF / 8pF | 8pF / 8pF |
| Leakage Current (IS(off) Max) | 100pA | 100pA |
| Crosstalk | -90dB @ 1MHz | -90dB @ 1MHz |
| Operating Temperature | 0°C ~ 70°C | 0°C ~ 70°C |
| Package / Case | 8-SOIC (0.154", 3.90mm Width) | 8-SOIC (0.154", 3.90mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| MSL Rating | 1 (Unlimited) | 1 (Unlimited) |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The MAX4544CSA+ is the direct equivalent for the obsolete MAX4544CSA. All electrical and mechanical parameters are identical. The MAX4544CSA+ is currently in active production status, ensuring long-term availability and supply chain continuity.
For new designs or production transitions, the MAX4544CSA+ is the appropriate selection. The MAX4544CSA+ carries ROHS3 compliance certification, whereas the original MAX4544CSA is RoHS non-compliant. Both parts maintain REACH Unaffected status and EAR99 export classification.
Packaging differs only in format: the MAX4544CSA+ is supplied in tube packaging, while the original part number does not specify packaging format. This distinction does not affect electrical performance or PCB-level compatibility.
Frequently Asked Questions (FAQ)
Q: Can MAX4544CSA+ be used as a direct replacement for MAX4544CSA in existing designs?
A: Yes. The MAX4544CSA+ is electrically and mechanically identical to the MAX4544CSA. All functional parameters, switching characteristics, and package dimensions are equivalent. Direct substitution is supported without circuit modification.
Q: What is the difference between MAX4544CSA and MAX4544CSA+?
A: The primary differences are product status and compliance certification. The MAX4544CSA is obsolete and RoHS non-compliant. The MAX4544CSA+ is active production and ROHS3 compliant. Electrical performance and package form factor are identical.
Q: Are there any compatibility concerns with the 8-SOIC package?
A: No. Both parts use the same 8-SOIC (0.154", 3.90mm Width) surface mount package. PCB footprints, reflow profiles, and handling procedures are identical.
Q: What supply voltage range does this switch support?
A: The MAX4544CSA and MAX4544CSA+ operate with a single supply voltage range of 2.7V to 12V. Dual supply operation is not supported by this part number.
Q: Is the MAX4544CSA+ suitable for new product designs?
A: Yes. The MAX4544CSA+ is in active production status and carries current compliance certifications (ROHS3). It is the recommended choice for new designs requiring SPDT analog switch functionality in the 8-SOIC package.
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