厂商：Freescale
类别：16位单片机
类别：8位单片机
厂商：Littelfuse
类别：瞬态抑制二极管
厂商：Panasonic
类别：PhotoMOS(MOSFET输出光电耦合器)
厂商：
类别：自恢复PTC
厂商：AKM
类别：数字音频DAC
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特点Withstands Transient Voltages Up to 200V/–200VRequires No Precision External ComponentsIndependently Monitors Two –48V Supplies for – Undervoltage Faults: –38.5V ±1V MAX – Overvoltage Faults: –70V ±1.5V MAX Accurately Detects Undervoltage Fault Recovery: –43V ±0.5V MAX Monitors Two External FusesOperates from –10V to –80VTolerates DC Faults to –100VTolerates Accidental Supply Reversal to 100VSmall Footprint: 8-Lead MSOP PackageSpecified from –40°C to 85°C典型应用描述The LTC?1921 monitors two independent –48V supplies, including their fuses, and drives up to three optoisolators to indicate status, in accordance with standard backplane specifications. Requiring only three noncritical resistors and optoisolators, the LTC1921 replaces multiple voltage comparators, a voltage reference and several precision resistors.The monitor features dual supply overvoltage and undervoltage detection circuits. The preset trip thresholds include overvoltage, undervoltage and undervoltage recovery that are guaranteed over temperature and meet or exceed common backplane specifications. Additional built-in circuitry detects the condition of supply fuses. Overvoltage and undervoltage detectors ignore fast supply transients, eliminating false detection. The LTC1921 operates from –10V to –80V with a typical power dissipation of less than 10mW.The LTC1921 is available in 8-pin MSOP and SOIC packages.