unisonic technologies co., ltd u74lcx74 cmos ic www.unisonic.com.tw 1 of 7 copyright ? 2013 unisonic technologies co., ltd qw-r502-999. a low voltage dual d-type positive edge-triggered flip-flop with 5v tolerant inputs ? description the u74lcx74 is a dual d-type flip-flop with asynchronous clear and set inputs and complementary (q, q ) outputs. information at the input is transferred to the outputs on the positive edge of the clock pulse. after the clock pulse input threshold voltage has been passed, the data input is locked out and information present will not be transferred to the outputs until the next rising edge of the clock pulse input. asynchronous inputs: low input to d s (set) sets q to high level low input to c d (clear) sets q to low level clear and set are independent of clock simultaneous low on c d and d s makes both q and q high ? features * 2.3v-3.6v v cc specifications provided * 5v tolerant inputs * 7.0 ns t pd max (v cc =3.3v), i cc =10 a (max.) * power down high impedance inputs and outputs * 24ma output drive (v cc =3.0v) ? ordering information ordering number package packing lead free halogen free u74lcx74l-p14-t u74lcx74g-p14-t tssop-14 tube U74LCX74L-P14-R u74lcx74g-p14-r tssop-14 tape reel
u74lcx74 cmos ic unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r502-999. a ? pin configuration ? pin descriptions pin names description d1, d2 data inputs cp1, cp2 clock pulse inputs 1 d c , 2 d c direct clear inputs 1 d s , 2 d s direct set inputs q1, 1 q , q2, 2 q outputs ? function table (each gate) input output function d s d c cp d q q l h x x h l asynchronous set h l x x l h asynchronous clear l l x x h h undetermined h h h h l load and read register h h l l h h h l x q 0 0 q hold h=high voltage level; l=low voltage level; x=immaterial; =low-to-high clock transition; q 0 ( 0 q )=previous q( q ) before low-to-high transition of clock
u74lcx74 cmos ic unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r502-999. a ? logic diagram (positive logic)
u74lcx74 cmos ic unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r502-999. a ? absolute maximum rating (unless otherwise specified)(note 1) parameter symbol ratings unit supply voltage v cc -0.5~7.0 v input voltage v in -0.5~ 7.0 v output voltage v out -0.5~v cc +0.5 v input diode current(v i v cc ) i ok 50 ma output current i out 50 ma v cc or gnd current i cc 100 ma ground current i gnd 100 ma storage temperature t stg -65 ~ +150 c notes: 1. the input and output voltage ratings may be exceeded if the input and output current ratings are observed. 2. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device operation is not implied. ? recommended operating comditions parameter symbol conditions min typ max unit supply voltage v cc 2.0 3.6 v input voltage v in 0 5.5 v output voltage v out 0 v cc v input transition rise or fall rate ? t/ ? v input edge rate, v in =0.8v-2v, v cc =3v 0 10 ns/v operating temperature t a -40 +85 c ? static characteristics (t a =-40c to +85c, unless otherwise specified) parameter symbol test conditions min typ max unit high-level input voltage v ih v cc =2.3v to 2.7v 1.7 v v cc =2.7v to 3.6v 2.0 low-level input voltage v il v cc =2.3v to 2.7v 0.7 v v cc =2.7v to 3.6v 0.8 high-level output voltage v oh v cc =2.3v to 3.6v, i oh =-100 a v cc -0.2 v v cc =2.3v, i oh =-8ma 1.8 v cc =2.7v, i oh =-12ma 2.2 v cc =3v, i oh =-18ma 2.4 v cc =3v, i oh =-24ma 2.2 low-level output voltage v ol v cc =2.3v to 3.6v, i ol =100ua 0.2 v v cc =2.3v, i ol =8ma 0.6 v cc =2.7v, i ol =12ma 0.4 v cc =3v, i ol =16ma 0.4 v cc =3v, i ol =24ma 0.55 input leakage current i i ( leak ) v cc =2.3v ~ 3.6v, v in =0 ~ 5.5v 5 a quiescent supply current i q v cc = 2.3v to 3.6v, v in = v cc or gnd 10 a v cc = 2.3v to 3.6v, 3.6v v in 5.5v 10 increase i cc per input ? i q v cc =2.3v to 3.6v, v ih =v cc -0.6v 500 a power-off leakage current i off v cc =0, v in or v out = 5.5v 10 a input capacitance c in v cc =open, v i =0 or v cc 7.0 pf output capacitance c out v cc =3.3v, v i =0 or v cc 8.0 pf
u74lcx74 cmos ic unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r502-999. a ? dynamic characteristics (input: t r , t f =3ns, f=1mhz, t a = -40c to 85c, r l =500 ? ) parameter symbol conditio ns min typ max unit maximum clock frequency f max v cc =2.5v0.2v, c l =30pf 150 mhz v cc =2.7v, c l =50pf 150 v cc =3.3v0.3v, c l =50pf 150 propagation delay cpn to qn or qn t phl /t plh v cc =2.5v0.2v, c l =30pf 1.5 8.4 ns v cc =2.7v, c l =50pf 1.5 8.0 v cc =3.3v0.3v, c l =50pf 1.5 7.0 propagation delay dn cor dn s to qn or qn t phl /t plh v cc =2.5v0.2v, c l =30pf 1.5 8.4 ns v cc =2.7v, c l =50pf 1.5 8.0 v cc =3.3v0.3v, c l =50pf 1.5 7.0 setup time t s v cc =2.5v0.2v, c l =30pf 4.0 ns v cc =2.7v, c l =50pf 2.5 v cc =3.3v0.3v, c l =50pf 2.5 hold time t h v cc =2.5v0.2v, c l =30pf 2.0 ns v cc =2.7v, c l =50pf 1.5 v cc =3.3v0.3v, c l =50pf 1.5 pulse width cp t w v cc =2.5v0.2v, c l =30pf 4.0 ns v cc =2.7v, c l =50pf 3.3 v cc =3.3v0.3v, c l =50pf 3.3 pulse width and dn c, dn s t w v cc =2.5v0.2v, c l =30pf 4.0 ns v cc =2.7v, c l =50pf 3.6 v cc =3.3v0.3v, c l =50pf 3.3 see fig. 1 and fig. 2 for test circuit and waveforms. ? operating characteristics parameter symbol test conditions min typ max unit power dissipation capacitance c pd v cc =3.3v, v i =0v or v cc , f=10mhz 25 pf
u74lcx74 cmos ic unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r502-999. a ? test circuit and waveforms from output c l test circuit r l note: c l includes probe and jig capacitance. fig. 1 load circuitry for switching times. v cc v m c l r l 2.5v0.2v v cc /2 30pf 500 ? 2.7v 1.5v 50pf 500 ? 3.3v0.3v 1.5v 50pf 500 ?
u74lcx74 cmos ic unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r502-999. a ? test circuit and waveforms(cont.) fig. 2 propagation delay from input to output and input voltage waveforms. 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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