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MAX349CAP Equivalent & Substitute Parts
Part Overview
The MAX349CAP is an 8:1 analog multiplexer IC manufactured by Analog Devices Inc./Maxim Integrated, designed for signal routing and switching applications in interface circuits. This component features a single 8:1 multiplexer configuration with 100Ohm on-state resistance in a 20-SSOP surface mount package.
The MAX349CAP is classified as obsolete. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain reliability, and support long-term product availability for applications currently utilizing this component.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Multiplexer Configuration | 8:1 |
| Number of Circuits | 1 |
| On-State Resistance (Max) | 100Ohm |
| Channel-to-Channel Matching (ΔRon) | 16Ohm (Max) |
| Voltage - Supply, Single (V+) | 2.7V ~ 16V |
| Voltage - Supply, Dual (V±) | ±2.7V ~ 8V |
| Switch Time (Ton, Toff) | 275ns, 150ns |
| Charge Injection | 1pC |
| Channel Capacitance (CS(off), CD(off)) | 2pF, 2pF |
| Current - Leakage (IS(off)) (Max) | 100pA |
| Crosstalk | -90dB @ 100kHz |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Package / Case | 20-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX349CAP is determined by strict equivalence across the following critical parameters:
- Multiplexer configuration: 8:1
- Number of circuits: 1
- On-state resistance: 100Ohm maximum
- Channel-to-channel matching: 16Ohm maximum
- Supply voltage ranges: 2.7V ~ 16V (single) and ±2.7V ~ 8V (dual)
- Switch timing: 275ns (Ton), 150ns (Toff)
- Charge injection: 1pC
- Channel capacitance: 2pF (both CS(off) and CD(off))
- Leakage current: 100pA maximum
- Crosstalk performance: -90dB @ 100kHz
- Package type: 20-SSOP surface mount
The MAX349CAP+ meets all electrical and mechanical specifications required for direct substitution. Both parts share identical functional parameters and package geometry, with differences limited to product status and compliance certifications.
Parameter Comparison
| Parameter | MAX349CAP | MAX349CAP+ |
|---|---|---|
| Multiplexer Configuration | 8:1 | 8:1 |
| Number of Circuits | 1 | 1 |
| On-State Resistance (Max) | 100Ohm | 100Ohm |
| Channel-to-Channel Matching (ΔRon) | 16Ohm (Max) | 16Ohm (Max) |
| Voltage - Supply, Single (V+) | 2.7V ~ 16V | 2.7V ~ 16V |
| Voltage - Supply, Dual (V±) | ±2.7V ~ 8V | ±2.7V ~ 8V |
| Switch Time (Ton, Toff) | 275ns, 150ns | 275ns, 150ns |
| Charge Injection | 1pC | 1pC |
| Channel Capacitance (CS(off), CD(off)) | 2pF, 2pF | 2pF, 2pF |
| Current - Leakage (IS(off)) (Max) | 100pA | 100pA |
| Crosstalk | -90dB @ 100kHz | -90dB @ 100kHz |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Package / Case | 20-SSOP (0.209", 5.30mm Width) | 20-SSOP (0.209", 5.30mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The MAX349CAP+ is the direct equivalent substitute for the MAX349CAP. Both components are electrically and mechanically identical across all functional parameters. The primary distinction is product lifecycle status: the MAX349CAP is obsolete, while the MAX349CAP+ maintains active production status.
For new designs or component replenishment, the MAX349CAP+ is the appropriate selection. This part is ROHS3 compliant, supporting modern regulatory requirements and supply chain continuity. The MAX349CAP+ is available in tube packaging and maintains full compatibility with existing MAX349CAP circuit implementations without design modification.
Frequently Asked Questions (FAQ)
Q: Can MAX349CAP+ directly replace MAX349CAP in existing designs?
A: Yes. The MAX349CAP+ is electrically and mechanically equivalent to the MAX349CAP. All electrical parameters, including multiplexer configuration, on-state resistance, supply voltage ranges, switching characteristics, and package dimensions are identical. Direct substitution requires no circuit modifications.
Q: What is the primary reason to transition from MAX349CAP to MAX349CAP+?
A: The MAX349CAP is classified as obsolete, creating supply chain risk. The MAX349CAP+ is an active product with ongoing manufacturing support. Additionally, the MAX349CAP+ is ROHS3 compliant, meeting current environmental and regulatory standards.
Q: Are there packaging differences between these parts?
A: Both parts use the 20-SSOP surface mount package with identical dimensions (0.209", 5.30mm width). The MAX349CAP+ is supplied in tube packaging, while the MAX349CAP packaging specification was not provided. The package footprint and pinout are identical.
Q: What are the critical electrical parameters that define substitution eligibility?
A: Substitution is based on equivalence across multiplexer configuration (8:1), on-state resistance (100Ohm), channel matching (16Ohm max), supply voltage ranges (2.7V ~ 16V single, ±2.7V ~ 8V dual), switch timing (275ns/150ns), charge injection (1pC), channel capacitance (2pF), leakage current (100pA), and crosstalk performance (-90dB @ 100kHz).
Q: Is the MAX349CAP+ suitable for new product designs?
A: Yes. The MAX349CAP+ is an active product with full manufacturing support and ROHS3 compliance, making it appropriate for new designs requiring an 8:1 analog multiplexer in a 20-SSOP package.
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