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SA555 データシート(PDF) 2 Page - Diodes Incorporated |
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SA555 データシート(HTML) 2 Page - Diodes Incorporated |
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2 / 14 page ![]() NE555/SA555/NA555 PRECISION TIMERS NE555/SA555/NA555 Document number: DS35112 Rev. 4 - 2 2 of 14 www.diodes.com February 2012 © Diodes Incorporated Pin Descriptions Pin Name Pin Number Description GND 1 Ground TRIG 2 Trigger set 1/3VCC OUT 3 Timer output RESET 4 Reset active low CONT 5 External adjustment of internal threshold and trigger voltages THRES 6 Threshold set to 2/3 VCC DISCH 7 Low impedance discharge path VCC 8 Chip supply voltage Functional Block Diagram RESET can override TRIG, which can override THRESH Functional Table Pin Name Nominal Trigger Voltage Threshold Voltage Output Discharge Switch GND Irrelevant Irrelevant Low On TRIG <1/3VCC Irrelevant High Off OUT <1/3VCC <2/3VCC Low On RESET <1/3VCC <2/3VCC As previously established |
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