MAX378:8通道、高电压、故障保护多路复用器

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
  • 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
MAX378、MAX379:引脚配置
MAX378、MAX379:引脚配置
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
数据手册DataSheet
语言下载文件备注
英文MAX378-MAX379.pdfRev 1; 08/1994
关键参数
Part NumberFunctionsConfig.ChannelsVSUPPLY (Dual)
(±V)
VSUPPLY (Dual)
(±V)
RON
(Ω)
IL(OFF)
(nA)
tON
(ns)
tOFF
(ns)
CON
(pF)
COFF
(pF)
Package/PinsBudgetary
Price
minmaxmaxmaxminmaxSee Notes
MAX378Mux8-to-114.518350021000500255
  • CDIP(N)/16
  • LCC/20
  • PDIP(N)/16
  • SOIC(W)/24
$7.12 @1k
MAX3794-to-1212
  • CDIP(N)/16
  • LCC/20
  • PDIP(N)/16
  • SOIC(W)/24
$3.65 @1k
质量和环境数据
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX378C/D停止供货DICE SALES,;NA引脚;DICE S;0°C至+70°C参考数据资料
MAX378CJE停止供货CDIP(N),;16引脚;173.5mm²0°C至+70°CRoHS/无铅:否
MAX378CPE停止供货MAX378CPE+PDIP(N),;16引脚;160.5mm²0°C至+70°CRoHS/无铅:否
MAX378CPE+生产中PDIP(N),;16引脚;160.5mm²0°C至+70°CRoHS/无铅:无铅
MAX378CWG停止供货MAX378CWG+SOIC(W),;24引脚;166.1mm²0°C至+70°CRoHS/无铅:否
MAX378CWG+生产中SOIC(W),;24引脚;166.1mm²0°C至+70°CRoHS/无铅:无铅
MAX378CWG+T生产中SOIC(W),;24引脚;166.1mm²0°C至+70°CRoHS/无铅:无铅
MAX378CWG-T停止供货MAX378CWG+TW.SO;24引脚0°C至+70°C参考数据资料
MAX378EJE停止供货CDIP(N),;16引脚;173.5mm²-40°C至+85°CRoHS/无铅:否
MAX378EPE停止供货MAX378EPE+PDIP(N),;16引脚;160.5mm²-40°C至+85°CRoHS/无铅:否
型号状况推荐替代产品封装:类型 引脚 占位面积封装图 编码/变更 *温度RoHS/无铅?
MAX378EPE+生产中PDIP(N),;16引脚;160.5mm²-40°C至+85°CRoHS/无铅:无铅
MAX378EWG停止供货MAX378EWG+SOIC(W),;24引脚;166.1mm²-40°C至+85°CRoHS/无铅:否
MAX378EWG+生产中SOIC(W),;24引脚;166.1mm²-40°C至+85°CRoHS/无铅:无铅
MAX378EWG+T生产中SOIC(W),;24引脚;166.1mm²-40°C至+85°CRoHS/无铅:无铅
MAX378EWG-T停止供货MAX378EWG+TW.SO;24引脚-40°C至+85°C参考数据资料
MAX378MJE停止供货CDIP(N),;16引脚;173.5mm²-55°C至+125°CRoHS/无铅:否
MAX378MJE/883B生产中CDIP(N),;16引脚;173.5mm²-55°C至+125°CRoHS/无铅:否
MAX378MLP生产中LCC,;20引脚;82.6mm²-55°C至+125°CRoHS/无铅:否
MAX378MLP/883B生产中LCC,;20引脚;82.6mm²-55°C至+125°CRoHS/无铅:否
MAX378-MAX379.pdf MAX379
MAX378.pdf MAX378
MAX378-MAX379.pdf MAX379