MAX378 - 8通道、高电压、故障保护多路复用器

MAX378是Maxim美信半导体公司的一款保护器产品，MAX378是8通道、高电压、故障保护多路复用器，本站介绍了MAX378的封装应用图解、特点和优点、功能等，并给出了与MAX378相关的Maxim元器件型号供参考。

MAX378 - 8通道、高电压、故障保护多路复用器 - 保护器 - Maxim美信半导体高性能芯片品质 - 美信半导体

产品概述

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.

关键特性

以下关键特性由Maxim美信半导体提供：

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

Latchup-Proof Construction

Operates from ±4.5V to ±18V Supplies

All Digital Inputs are TTL and CMOS Compatible

Low-Power Monolithic CMOS Design

热门应用

航空电子测试设备

数据采集

工业与过程控制系统

系统间的信号路由

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