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MAX378CWG Equivalent & Substitute Parts
Part Overview
The MAX378CWG is an 8:1 multiplexer/demultiplexer integrated circuit manufactured by Analog Devices Inc./Maxim Integrated. This interface component features a single circuit configuration with 4.6kOhm on-state resistance and operates across a dual supply voltage range of ±4.5V to ±18V. The device is packaged in a 24-SOIC surface mount package.
The MAX378CWG is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure component availability, and support ongoing production requirements for systems utilizing this multiplexer architecture.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Multiplexer/Demultiplexer Circuit | 8:1 |
| Number of Circuits | 1 |
| On-State Resistance (Max) | 4.6kOhm |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 18V |
| Switch Time (Ton, Toff) (Max) | 400ns, 300ns (Typ) |
| Channel Capacitance (CS(off), CD(off)) | 5pF, 25pF |
| Current - Leakage (IS(off)) (Max) | 1nA |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Package / Case | 24-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount |
Substitute Part Grouping Explanation
Substitution eligibility for the MAX378CWG is determined by strict equivalence across the following critical parameters:
- Multiplexer configuration: 8:1 topology
- Number of circuits: Single circuit
- On-state resistance: 4.6kOhm maximum
- Dual supply voltage range: ±4.5V ~ 18V
- Switch timing characteristics: 400ns (Ton), 300ns (Toff) typical
- Channel capacitance specifications: 5pF (CS(off)), 25pF (CD(off))
- Leakage current: 1nA maximum
- Operating temperature range: 0°C ~ 70°C
- Package format: 24-SOIC surface mount
The MAX378CWG+ meets all electrical and mechanical substitution criteria and is classified as a direct equivalent part.
Parameter Comparison
| Parameter | MAX378CWG | MAX378CWG+ |
|---|---|---|
| Multiplexer/Demultiplexer Circuit | 8:1 | 8:1 |
| Number of Circuits | 1 | 1 |
| On-State Resistance (Max) | 4.6kOhm | 4.6kOhm |
| Voltage - Supply, Dual (V±) | ±4.5V ~ 18V | ±4.5V ~ 18V |
| Switch Time (Ton, Toff) (Max) | 400ns, 300ns (Typ) | 400ns, 300ns (Typ) |
| Channel Capacitance (CS(off), CD(off)) | 5pF, 25pF | 5pF, 25pF |
| Current - Leakage (IS(off)) (Max) | 1nA | 1nA |
| Operating Temperature | 0°C ~ 70°C (TA) | 0°C ~ 70°C (TA) |
| Package / Case | 24-SOIC (0.295", 7.50mm Width) | 24-SOIC (0.295", 7.50mm Width) |
| Mounting Type | Surface Mount | Surface Mount |
| Product Status | Obsolete | Active |
| RoHS Status | RoHS non-compliant | ROHS3 Compliant |
Engineering Selection Recommendations
The MAX378CWG+ is the direct functional equivalent of the MAX378CWG. Both parts share identical electrical specifications and mechanical packaging. The primary distinction is product lifecycle status: the MAX378CWG is obsolete, while the MAX378CWG+ maintains active production status.
The MAX378CWG+ additionally provides ROHS3 compliance, whereas the original MAX378CWG is non-compliant. This compliance improvement supports regulatory requirements for new designs and manufacturing environments subject to RoHS directives.
For applications currently utilizing the MAX378CWG, the MAX378CWG+ provides direct substitution without circuit redesign or performance compromise.
Frequently Asked Questions (FAQ)
Q: Can the MAX378CWG+ be used as a direct replacement for the MAX378CWG?
A: Yes. The MAX378CWG+ is electrically and mechanically equivalent. All functional parameters, including multiplexer configuration, on-state resistance, supply voltage range, switching characteristics, and package format are identical.
Q: What is the difference between MAX378CWG and MAX378CWG+?
A: The primary differences are product status and RoHS compliance. The MAX378CWG is obsolete and RoHS non-compliant. The MAX378CWG+ is in active production and ROHS3 compliant. Electrical and mechanical specifications are identical.
Q: Are there packaging differences between these parts?
A: Both parts use the 24-SOIC surface mount package with identical dimensions (0.295", 7.50mm width). The MAX378CWG+ is supplied in tube packaging, while the original MAX378CWG packaging format is not specified in the available data.
Q: What supply voltage range does this multiplexer support?
A: The MAX378CWG and MAX378CWG+ operate with dual supply voltages ranging from ±4.5V to ±18V.
Q: What is the on-state resistance specification?
A: Both parts specify a maximum on-state resistance of 4.6kOhm across all eight channels.
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