unisonic technologies co., ltd u74lvc74a cmos ic www.unisonic.com.tw 1 of 7 copyright ? 2013 unisonic technologies co., ltd qw-r502-879.c dual positive-edge- triggered d-type flip-flops with clear and preset ? description the u74lvc74a is a dual positive-edge-triggered d-type flip-flop. the preset ( pre ) and clear ( clr ) input can set or reset the output, egardless of the levels f others inputs. when the pre and clr are inactive(high),data at th e data input meeting the set-up time requirements is transferred to the outputs on the positive-going edge of the clock pulse. following the hold-time interval, data d can be changed without affecting the levels at the outputs. ? features * 1.65v to 3.6v v cc operation * inputs accept voltages to 5.5v * max tpd at 5.2ns of 3.3v * typical v olp <0.8v at v cc =3.3v, t a =25c * typical v ohv >2v at v cc =3.3v, t a =25c ? ordering information ordering number package packing lead free halogen free u74lvc74al-s14-t u74lvc74ag-s14-t sop-14 tube u74lvc74al-s14-r u74lvc74ag-s14-r sop-14 tape reel u74lvc74al-p14-t u74lvc74ag-p14-t tssop-14 tube U74LVC74AL-P14-R u74lvc74ag-p14-r tssop-14 tape reel
u74lvc74a cmos ic unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r502-879.c ? pin configuration ? function table (each gate) input output pre clr clk d q q l h x x h l h l x x l h l l x x ? h ? h h h h h l h h l l h h h l x q 0 q 0 : this configuration is unstable, as it is not persist when either pre or clr return to high level. ? logic diagram (positive logic)
u74lvc74a cmos ic unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r502-879.c ? absolute maximum rating (unless otherwise specified)(note 1) parameter symbol ratings unit supply voltage v cc -0.5~6.5 v input voltage v in -0.5~ 6.5 v output voltage(active mode) v out -0.5~v cc +0.5 v input clamp current(v in <0) i i k -50(max) ma output clamp current(v out <0) i o k -50(max) ma output current i out 50 ma v cc or gnd current i cc 100 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 1.65 3.6 v input voltage v in 0 5.5 v output voltage v out 0 v cc v high-level input voltage v ih v cc =1.65v~1.95v 0.65v cc v v cc =2.3v~2.7v 1.7 v cc =2.7v~3.6v 2 low-level input voltage v il v cc =1.65v~1.95v 0.35v cc v v cc =2.3v~2.7v 0.7 v cc =2.7v~3.6v 0.8 high-level output current i oh v cc =1.65v -4 ma v cc =2.3v -8 v cc =2.7v -12 v cc =3v -24 low-level output current i ol v cc =1.65v 4 ma v cc =2.3v 8 v cc =2.7v 12 v cc =3v 24 input transition rise or fall rate ? t/ ? v 10 ns/v operating temperature t a -40 +85 c
u74lvc74a cmos ic unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r502-879.c ? static characteristics parameter symbol test conditions min typ max unit high-level output voltage v oh i oh =-100ua v cc =1.65v~3.6v v cc -0.2 v i oh =-4ma v cc =1.65v 1.2 i oh =-8ma v cc =2.3v 1.7 i oh =-12ma v cc =2.7v 2.2 v cc =3v 2.4 i oh =-24ma v cc =3v 2.2 low-level output voltage v ol i ol =100ua v cc =1.65v~3.6v 0.2 v i ol =4ma v cc =1.65v 0.45 i ol =8ma v cc =2.3v 0.7 i ol =12ma v cc =2.7v 0.4 i ol =24ma v cc =3v 0.55 input leakage current i i(leak) v cc =0v~3.6v v in =5.5v or gnd 5 a quiescent supply current i q v cc =3.6v v in =v cc or gnd i out =0 10 a additional quiescent supply current ? i q v cc =2.7v to 3.6v one input at v cc -0.6v, other inputs at v cc or gnd 500 a input capacitance c in v cc =3.3v, v in =v cc or gnd 5 pf ? dynamic characteristics (input: t r , t f 2.5ns; prr 1mhz) parameter symbol test conditions min typ max unit fclock clock frequency f clock v cc =1.8v0.15v 83 mhz v cc =2.5v0.2v 83 v cc =2.7v 83 v cc =3.3v0.3v 150 pulse duration t w v cc =1.8v0.15v pre or clr low 4.1 ns clk high or low 4.1 v cc =2.5v0.2v pre or clr low 3.3 clk high or low 3.3 v cc =2.7v pre or clr low 3.3 clk high or low 3.3 v cc =3.3v0.3v pre or clr low 3.3 clk high or low 3.3 setup time before clk t su v cc =1.8v0.15v data 3.6 ns pre or clr inactive 2.7 v cc =2.5v0.2v data 2.3 pre or clr inactive 1.9 v cc =2.7v data 3.4 pre or clr inactive 2.2 v cc =3.3v0.3v data 3 pre or clr inactive 2 hold time ,data after clk t h v cc =1.8v0.15v 1 ns v cc =2.5v0.2v 1 v cc =2.7v 1 v cc =3.3v0.3v 0
u74lvc74a cmos ic unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r502-879.c ? dynamic characteristics see fig. 1 and fig. 2 for test circuit and waveforms. parameter symbol test conditions min typ max unit m axinum clock pulse frequency f max v cc =1.8v0.15v 83 mhz v cc =2.5v0.2v 83 v cc =2.7v 83 v cc =3.3v0.3v 150 propagation delay from input (clk) to output(q or q) t plh/ t phl v cc =1.8v0.15v, c l =30pf, r l =1k ? 1 7.1 ns v cc =2.5v0.2v, c l =30pf, r l =500 ? 1 4.4 v cc =2.7v, c l =50pf, r l =500 ? 1 6 v cc =3.3v0.3v, c l =50pf, r l =500 ? 1 5.2 propagation delay from input ( pre or clr ) to output(q or q) t plh/ t phl v cc =1.8v0.15v, c l =30pf, r l =1k ? 1 6.9 ns v cc =2.5v0.2v, c l =30pf, r l =500 ? 1 4.6 v cc =2.7v, c l =50pf, r l =500 ? 1 6.4 v cc =3.3v0.3v, c l =50pf, r l =500 ? 1 5.4 ? operating characteristics parameter symbol test conditions min typ max unit power dissipation capacitance c pd v cc =1.8v, f=10mhz 24 pf v cc =2.5v, f=10mhz 24 pf v cc =3.3v, f=10mhz 26 pf
u74lvc74a cmos ic unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r502-879.c ? 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. fig. 2 propagation delay from input to output and input voltage waveforms. v cc inputs v m c l r l v in t r , t f 1.8v0.15v v cc 2ns v cc /2 30pf 1k ? 2.5v0.2v v cc 2ns v cc /2 30pf 500 ? 2.7v 2.7v 2.5ns 1.5v 50pf 500 ? 3.3v0.3v 2.7v 2.5ns v cc /2 50pf 500 ?
u74lvc74a cmos ic unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r502-879.c ? test circuit and waveforms(cont.) fig. 3 propagation delay times 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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