ICOM-ICM7555_ICM7555I_ICM7555C_1维修手册

Philips Semiconductors Linear ProductsProduct specificationGeneral purpose CMOS timer1CM7555DESCRIPTIONPIN CONFIGURATIONThe ICM7555 is a CMOS timer providing significantly improvedperfommance over the standard NE/SE555 timer,while at the sameD and N Packagestime being a direct replacement for those devices in mostapplications.Improved parameters include low supply current,wideGND18 VDDoperating supply voltage range,low THRESHOLD,TRIGGER,andTRIGGER 2刁DISCHARGERESET currents,no crowbarring of the supply current during outputtransitions,higher frequency performance and no requirement toOUTPUT 36THRESHOLDdecouple CONTROL VOLTAGE for stable operation.RESET 45CONTROL VOLTAGEThe ICM7555 is a stable controller capable of producing accuratetime delays or frequencies.In the one-shot mode,the pulse width of each circuit is preciselyTiming from microseconds through hourscontrolled by one external resistor and capacitor.For astableOperates in both astable and monostable modesoperation as an oscillator,the free-running frequency and the dutycycle are both accurately controlled by two external resistors andAdjustable duty cycleone capacitor.Unlike the bipolar 555 device,the CONTROLVOLTAGE terminal need not be decoupled with a capacitor.TheHigh output source/sink driver can drive TTL/CMOSTRIGGER and RESET inputs are active low.The output inverter canTypical temperature stability of 0.005%C at 25'Csource or sink currents large enough to drive TTLloads or provideminimal offsets to drive CMOS loads.●Rai-to-rail outputsFEATURESAPPLICATIONSExact equivalent in most applications for NE/SE555●Precision timing.Low supply current:80uA(typ)·Pulse generationExtremely low trigger,threshold,and reset currents:20pA(typ)·Sequential timingHigh-speed operation:500kHz guaranteedTime delay generation.Wide operating supply voltage range guaranteed 3 to 16V over full.Pulse width modulationautomotive temperaturesPulse position modulationNormal reset function;no crowbarring of supply during outputMissing pulse detectortransition.Can be used with higher-impedance timing elements than thebipolar 555 for longer time constantsORDERING INFORMATIONDESCRIPTIONTEMPERATURE RANGEORDER CODEDWG#8-Pin Plastic Dual In-Line Package (DIP)0to+70°CICM7555CN0404B8-Pin Plastic Small Outline (SO)Package0to+70°CICM7555CD0174C8-Pin Plastic Dual In-Line Package (DIP).40to+85°CICM7555IN0404B8-Pin Plastic Small Outline (SO)Package.40to+85CICM7555ID0174CAugust 31,1994337853-119213721