MAX378CPE+

The MAX378CPE+ is a high-voltage, fault-protected analogue multiplexer in 16 pin DIP package. This single-ended (1-of-8) multiplexer use a series NPN structure to provide significant fault protection. If the power supplies to it is 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 MAX378 and circuitry they drive, but also the sensors or signal sources that drive the muxes. The series NPN protection structure has two significant advantages over the simple current-limiting protection scheme. First, Analog Devicesprotection scheme limits fault currents to nanoamp leakage values rather than many milliamperes. Second, MAX378 fault-protected muxes can withstand a continuous ±60V input, unlike first generation which had a continuous ±35V input limitation imposed by power dissipation considerations.

• Operates from ±4.5V to ±18V supplies
• Fault input voltage ±75V with power supplies off
• Fault input voltage ±60V with ±15V power supplies
• All switches off with power supplies off
• On channel turns off if overvoltage occurs on input or output
• Only nanoamperes of input current under all fault conditions
• No increase in supply currents due to fault conditions
• Latch-up proof construction
• All digital inputs are TTL and CMOS compatible
• Low-power monolithic CMOS design

Applications

Communications & Networking, Industrial

Notes

ADI products are only authorized (and sold) for use by the customer and are not to be resold or otherwise passed on to any third party