MAX378

8通道、高电压、故障保护多路复用器


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说明

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.
MAX378、MAX379:引脚配置 MAX378、MAX379:引脚配置 放大+

关键特性

  • 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

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
Part NumberFunctionsConfig.ChannelsVSUPPLY (Dual)
(±V)
VSUPPLY (Dual)
(±V)
RON
(Ω)
IL(OFF)
(nA)
tON
(ns)
tOFF
(ns)
CON
(pF)
COFF
(pF)
Package/PinsBudgetary
Price
minmaxmaxmaxmaxmaxSee Notes
MAX378 Mux8-to-114.518350021000500255
CDIP/16
LCC/20
PDIP/16
SOIC (W)/24
$7.12 @1k
MAX379 4-to-1212
CDIP/16
LCC/20
PDIP/16
SOIC (W)/24
$3.65 @1k
查看所有Switches and Multiplexers (Mid and High Voltage) (299)
Pricing Notes:
价格仅供参考,用于同类产品的比较。所提供报价为美元,需要依汇率折合成人民币。该价格将因当地关税、税率和汇率而异。有关特定订购量和指定版本的报价和供货问题,请参考:价格与供货网站或与指定代理商联系。

质量和环境数据

产品可靠性报告: MAX378.pdf 
无铅封装的锡(Sn)晶须报告

CAD Symbols and Footprints

  • MAX378CPE+
  • MAX378CWG+
  • MAX378CWG+T
  • MAX378EPE+
  • MAX378EWG+
  • MAX378EWG+T
  • MAX378MJE/883B
  • MAX378MLP
  • MAX378MLP/883B
  • 型号   生产流程   工艺   样本量   不合格   FIT @ 25°C   FIT @ 55°C  

    备注: 通过技术手段对故障率进行汇总,并映射到相关的材料部件号。 故障率与被测件的数量密切相关。

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