unisonic technologies co., ltd u74hc74 cmos ic www.unisonic.com.tw 1 of 5 copyright ? 2010 unisonic technologies co., ltd qw-r502-385.a dual d flip-flop with set and reset,positive-edgen trigger ? description the u74hc74 contains dual d flip-flops and each flip-flop has independent data, set , reset and clock inputs and complementary outputs q and q . a low level at appropriate input helps set and reset adjust the output. data will be transferred to the output during the low-to-high transition of the clk while set and reset are high. ? features * operation voltage range: 2~6v * buffered inputs * asynchronous set and reset * complementary outputs * high noise immunity ? ordering information ordering number package packing u74hc74g-p14-r tssop-14 tape reel u74hc74g-s14-r sop-14 tape reel
u74hc74 cmos ic unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r502-385.a ? pin configuration 1 2 3 4 5 6 7 14 13 12 11 10 9 8 gnd 1q 1q 1s 1cp 1d 1r 2q 2q 2s 2cp 2d 2r v cc ? function table (each gate) input output set reset cp d q q l h h l h l l h h h h h l h h l l h h h l q0 q0 l l h (note) h (note) note: unstable state, it will not persist when set and reset inputs return to their inactive level. ? functional diagram logic diagram tg tg tg tg c c c c c c c c q q s cp d r c c iec logic symbol
u74hc74 cmos ic unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r502-385.a ? absolute maximum rating (unless otherwise specified)(note 1) parameter symbol ratings unit supply voltage v cc -0.5 ~ +7 v input voltage v in 0 ~ v cc v output voltage v out 0 ~ v cc v input clamp current i ik 20 ma output clamp current 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: absolute maximum ratings are those values beyo nd which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? recommended operating conditions parameter symbol min typ max unit supply voltage v cc 2 6 v input voltage v in 0 v cc v output voltage v out 0 v cc v v cc =2v 1000 v cc =4.5v 500 input transition rise or fall rate v cc =6v t r , t f 400 ns operating temperature t a -55 125 c ? static characteristics (t a =25 c ) parameter symbol test conditions min typ max unit v cc =2.0v 1.5 v cc =4.5v 3.15 high-level input voltage v ih v cc =6.0v 4.2 v v cc =2.0v 0.5 v cc =4.5v 1.35 low-level input voltage v il v cc =6.0v 1.8 v v cc =2.0v, i oh =-20a 1.9 v cc =4.5v, i oh =-20a 4.4 v cc =6.0v, i oh =-20a 5.9 v cc =4.5v, i oh =-4ma 3.98 high-level output voltage v oh v cc =6v, i oh =-5.2ma 5.48 v v cc =2.0v, i ol =20a 0.1 v cc =4.5v, i ol =20a 0.1 v cc =6.0v, i ol =20a 0.1 v cc =4.5, i ol =4ma 0.26 low-level output voltage v ol v cc =6, i ol =5.2ma 0.26 v input leakage current i i(leak) v cc =6.0v, v in =v cc or gnd 0.1 a quiescent supply current i q v cc =6.0v, v in =v cc or gnd, i out =0 4 a input capacitance c in v cc =6.0v, v in =v cc or gnd 10 pf
u74hc74 cmos ic unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r502-385.a ? dynamic characteristics (t a =25c) (input: t r , t f =6ns) parameter symbol test conditions min typ max unit v cc =2.0v, c l =50pf 175 ns v cc =4.5v, c l =50pf 35 ns propagation delay from input (cp) to output(q, q ) t plh /t phl v cc =6.0v, c l =50pf 30 ns v cc =2.0v, c l =50pf 200 ns v cc =4.5v, c l =50pf 40 ns propagation delay from input ( r , s ) to output(q, q ) t plh /t phl v cc =6.0v, c l =50pf 34 ns v cc =2.0v, c l =50pf 75 ns v cc =4.5v, c l =50pf 15 ns output transition time t tlh /t thl v cc =6.0v, c l =50pf 13 ns cp frequency f max v cc =5v, c l =15pf 50 mhz ? operating characteristics parameter symbol test conditions min typ max unit power dissipation capacitance cpd no load 25 pf
u74hc74 cmos ic unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r502-385.a ? test circuit and waveforms note : c l includes probe and jig capacitance. 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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