The MAX378 8-channel single-ended (1-of-8) multiplexer and the MAX379 4-channel differential (2-of-8) multiplexer use a series N-channel/P-channel/N-channel structure to provide significant fault protection. If the power supplies to the MAX378/MAX379 are inadvertently turned off while input voltages are still applied, all channels in the muxes are turned off, and only a few nanoamperes of leakage current will flow into the inputs. This protects not only the MAX378/MAX379 and the circuitry they drive, but also the sensors or signal sources that drive the muxes. The series N-channel/P-channel/N-channel protection structure has two significant advantages over the simple current-limiting protection scheme of the industry's first-generation fault-protected muxes. First, the Maxim protection scheme limits fault currents to nanoamp leakage values rather than many milliamperes. This prevents damage to sensors or other sensitive signal sources. Second, the MAX378/MAX379 fault-protected muxes can withstand a continuous±60V input, unlike the first generation, which had a continuous ±35V input limitation imposed by power dissipation considerations. All digital inputs have logic thresholds of 0.8V and 2.4V, ensuring both TTL and CMOS compatibility without requiring pull-up resistors. Break-before-make operation is guaranteed. Power dissipation is less than 2mW.
title | Download file |
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MAX378-MAX379 Data Sheet | MAX378-MAX379.pdf |
Part Number | Functions | Config. | Channels | VSUPPLY (Dual) (±V) | VSUPPLY (Dual) (±V) | RON (Ω) | IL(OFF) (nA) | tON (ns) | tOFF (ns) | CON (pF) | COFF (pF) | Package/Pins | Budgetary Price |
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min | max | max | max | min | max | See Notes | |||||||
MAX378 | Mux | 8-to-1 | 1 | 4.5 | 18 | 3500 | 2 | 1000 | 500 | 25 | 5 | CDIP(N)/16 LCC/20 PDIP(N)/16 SOIC(W)/24 | $7.12 @1k |
MAX379 | 4-to-1 | 2 | 12 | CDIP(N)/16 LCC/20 PDIP(N)/16 SOIC(W)/24 | $3.65 @1k | ||||||||
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
---|---|---|---|---|---|
MAX379C/D | No Longer Available | See data sheet | |||
MAX379CJE | No Longer Available | CDIP(N),;16 pin;173.5 mm² | 0°C to +70°C | No | |
MAX379CPE | No Longer Available | MAX379CPE+ | PDIP(N),;16 pin;160.5 mm² | 0°C to +70°C | No |
MAX379CPE+ | Active | PDIP(N),;16 pin;160.5 mm² | 0°C to +70°C | Lead Free | |
MAX379CWG | No Longer Available | MAX379CWG+ | SOIC(W),;24 pin;166.1 mm² | 0°C to +70°C | No |
MAX379CWG+ | Active | SOIC(W),;24 pin;166.1 mm² | 0°C to +70°C | Lead Free | |
MAX379CWG+T | Active | SOIC(W),;24 pin;166.1 mm² | 0°C to +70°C | Lead Free | |
MAX379CWG-T | No Longer Available | MAX379CWG+T | W.SO;24 pin | 0°C to +70°C | See data sheet |
MAX379EJE | No Longer Available | CDIP(N),;16 pin;173.5 mm² | -40°C to +85°C | No | |
MAX379EPE | No Longer Available | MAX379EPE+ | PDIP(N),;16 pin;160.5 mm² | -40°C to +85°C | No |
Part Number | Status | Recommended Replacement | Package | Temp | RoHS |
MAX379EPE+ | Active | PDIP(N),;16 pin;160.5 mm² | -40°C to +85°C | Lead Free | |
MAX379EWG | No Longer Available | MAX379EWG+ | SOIC(W),;24 pin;166.1 mm² | -40°C to +85°C | No |
MAX379EWG+ | Active | SOIC(W),;24 pin;166.1 mm² | -40°C to +85°C | Lead Free | |
MAX379EWG+T | Active | SOIC(W),;24 pin;166.1 mm² | -40°C to +85°C | Lead Free | |
MAX379EWG-T | No Longer Available | MAX379EWG+T | W.SO;24 pin | -40°C to +85°C | See data sheet |
MAX379MJE | No Longer Available | CDIP(N),;16 pin;173.5 mm² | -55°C to +125°C | No | |
MAX379MJE/883B | Active | CDIP(N),;16 pin;173.5 mm² | -55°C to +125°C | No | |
MAX379MJE/HR | No Longer Available | MAX379MJE/883B | CDIP(N),;16 pin;173.5 mm² | -55°C to +125°C | No |
MAX379MLP | No Longer Available | LCC,;20 pin;82.6 mm² | -55°C to +125°C | No | |
MAX379MLP/883B | No Longer Available | LCC,;20 pin;82.6 mm² | -55°C to +125°C | No |