HA17555 SeriesPrecision TimerDescriptionHA17555 Series are ICs designed for accurate time delays or oscillations. It provides both of triggerterminal and reset terminal in order to enable a wide scope of application including Mono Multi Vibratorand Astable Multi Vibrator, and the number of external components is fewer. Further, it’s compatible withNE555 of singnetics.Featu res• Mono multi vibrator can be constructed with one resistor and one capacitor.• Astable multi vibrator can be constructed with two resistors and one capacitor.• Delay time can be established widely from several µ seconds to several hours.• Pulse Duty can be controlled.• The maximum value of both sink current and source current is 200mA.• Direct connection of output to TTL is possible.• Temperature/delay time ratio is 50 ppm/°C (typ).• Output is normally in the on and off states.Ordering InformationApplicationTy pe No.PackageIndu strial u seHA17555PSDP-8HA17555FPFP-8DCommercial u seHA17555DP-8HA17555FFP-8DHA17555 Series2Applications• Delay Time Generator (Mono Mu lti Vibrator)• Pu lse Generator (Astable Mu lti Vibrator)• Pu lse Width Modu lator• Pu lse Location Modu lator• Miss Pu lse DetectorPin Arrangement12348765GNDTriggerOutputResetVCCDischargeThresholdControl Voltage(Top View)Pin DescriptionPin No.Fu nction1Ground pin2Trigger pin3Output pin4Reset pin5Control voltage pin6Threshold pin7Discharge pin8VCC pinHA17555 Series3Circu it SchematicR1R2R4Q5Q7Q9Q8ControlVoltageVCCThresholdTriggerQ6Q11Q10Q12Q13Q17Q16R11Q18Q15Q25Q20Q23Q19Q4Q2Q1Q3Ou tpu tDischargeGNDResetR3R6R5R9R8R7Q21Q22Q24R12R13Q14R14R15R16Block DiagramControlResetOu tpu tThresholdDischargeTriggerVCCQRSCLRHA17555 Series4Absolute Maximum Ratings (Ta = 25°C)ItemSy mbolHA17555PS/FPHA17555/FUnitSupply voltageVCC1818VDischarge c...
