utc NE558 linear integrated circuit utc unisonic technologies co., ltd. 1 qw-r106-003,a quad timer description the utc NE558 is a monolithic quad timer which can be used to produce four entirely independent timing functions. the highly stable, general purpose controller can be used in a monostable mode to produce accurate time delays. features *wide supply voltage: vcc= 4.5v~15v *100ma output current per-section *edge trigger without coupling capacitor *time period equals rc *output independent dip-16 sop-16 applications *precision timing *quad one-shot *timing delay generation *sequential timing. block diagram
utc NE558 linear integrated circuit utc unisonic technologies co., ltd. 2 qw-r106-003,a absolute maximum ratings (ta=25 c ) parameter symbol value unit supply voltage vcc 16 v power dissipation pd 600 mw lead temperature(soldering 10 sec.) tlead 300 c operating temperature topr -40~85 c storage temperature tstg -65~150 c electrical characteristics ( ta=25 c ,vcc=5 to 15v, unless otherwise specified ) parameter symbol test conditions min typ max unit supply voltage vcc 4.5 16 v supply current icc vcc=15v,rl=15v 16 36 ma timing error(t=rc) initial accuracy a ccur r a =2k ? to 100k ? c=1 f 2 5 % drift with temperature ? t/ ? t 30 150 ppm/ c drift with supply voltage ? t/ ? vcc 0.1 0.9 %/v threshold voltage( note 1) v th 0.63*vcc v threshold current i th 15 na trigger voltage vtr vcc=15v 0.8 1.5 2.4 v trigger current itr vtr=0 5 100 a reset voltage(note 2) vrst reset 0.8 1.5 2.4 v reset current irst reset 5 100 a output voltage( note 3) v ol il=10ma il=100ma 0. 1 1 0. 4 2 v rise time of output tr il=100ma 100 nsec fall time of output t f il=100ma 100 300 nsec discharge leakage current i lkg 10 500 na note 1: the trigger functions only on the falling edge of the trigger pulse only after previously being high. after reset, the trigger must be brought high and then low to implement triggering. note 2: for reset below 0.8v, output s set low and trigger inhibited. note 3: output structure is open collector which requires a pull up resistor to vcc to sink current. the output is normally low sinking current. utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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