unisonic technologies co., ltd u74ahct14 cmos ic www.unisonic.com.tw 1 of 4 copyright ? 2012 unisonic technologies co., ltd qw-r502-799.a hex schmitt-trigger inverter ? description the u74ahct14 is a high speed si-gate cmos device which contains six independent schmitt-tr igger inverters and they perform the function y=a. the device have different input threshold levels for positive-going (v t+ ) and negative-going(v t- ) signals because of the schmitt-trigger action in the input. ? features * all inputs have schmitt-trigger action * inputs are ttl-voltage compatible * balanced propagation delays ? ordering information ordering number package packing lead free halogen free U74AHCT14L-S14-R u74ahct14g -s14-r sop-14 tape reel u74ahct14l-p14-r u74ahct14g -p14-r tssop-14 tape reel
u74ahct14 cmos ic unisonic technologies co., ltd 2 of 4 www.unisonic.com.tw qw-r502-799.a ? pin configuration ? function table (each gate) input output a y l h h l ? logic diagram (positive logic) iec logic symbol
u74ahct14 cmos ic unisonic technologies co., ltd 3 of 4 www.unisonic.com.tw qw-r502-799.a ? absolute maximum rating (t a =25c, unless otherwise specified)(note 1) parameter symbol ratings unit supply voltage v cc -0.5~7 v input voltage v in -0.5~7 v output voltage(active mode) v out -0.5~v cc +0.5 v input clamp current(v in <0) i ik -20 ma output clamp current(v out <0) i ok 20 ma output current i out 25 ma v cc or gnd current i cc 50 ma storage temperature t stg -65 ~ +150 c note 1. the input and output voltage ratings may be exce eded if the input and output cu rrent ratings are observed. 2. absolute maximum ratings are those values be yond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? recommended operating comditions parameter symbol conditions min typ max unit supply voltage v cc operating 4.5 5.5 v input voltage v in 0 5.5 v output voltage v out 0 v cc v operating temperature t a -40 +85 c ? static characteristics (t a =25c, unless otherwise specified) parameter symbol test conditions min typ max unit positive-going input threshold voltage v t+ v cc =4.5v 0.9 1.9 v v cc =5.5v 1 2.1 negative-going input threshold voltage v t- v cc =4.5v 0.5 1.5 v v cc =5.5v 0.6 1.7 hysteresis voltage (v t+ -v t- ) v t v cc =4.5v 0.4 1.4 v v cc =5.5v 0.4 1.5 high-level output voltage v oh v cc =4.5v, i oh =-50 a 4.4 v v cc =4.5v, i oh =-8ma 3.94 low-level output voltage v ol v cc =4.5v, i ol =50 a 0.1 v v cc =4.5v, i ol =8ma 0.36 input leakage current i i ( leak ) v cc =0v ~ 5.5v, v in =v cc or gnd 0.1 a quiescent supply current i cc v cc = 5.5v, v in =5.5v or gnd, i out =0 0.1 2 a additional quiescent supply current i cc v cc = 5.5v, one input at 3.4v, other inputs at v cc or gnd 1.35 ma input capacitance c in v cc =3.3v, v in =v cc or gnd 2 10 pf ? dynamic characteristics (input: t r , t f 3ns; prr 1mhz) see fig. 1 and fig. 2 for test circuit and waveforms. parameter symbol test conditions min typ max unit propagation delay from input (a or b) to output(y) t plh /t phl v cc =5v0.5v, c l =15pf 4 7 ns v cc =5v0.5v, c l =50pf 5.5 8 ? operating characteristics parameter symbol test conditions min typ max unit power dissipation capacitance cpd no load, f=1mhz, v cc =5v 12 pf
u74ahct14 cmos ic unisonic technologies co., ltd 4 of 4 www.unisonic.com.tw qw-r502-799.a ? test circuit and waveforms fig. 1 load circuitry for switching times. note: cl includes probe and jig capacitance. fig. 2 propagation delay from input(a) to output(y) and output transition time. 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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