unisonic technologies co., ltd u74lvc1g79 cmos ic www.unisonic.com.tw 1 of 7 copyright ? 2012 unisonic technologies co., ltd qw-r502-803.a single positive-edge-triggered d-type flip-flop ? description the u74lvc1g79 is a single positive-edge-triggered d-type flip-flop. when data at the data input (d) meets the set-up time requirements, the data is trans ferred to the outputs (q) on the positive-going edge of the clock pulse. following the hold-time interval, data at the d input can be changed without affecting the level at the outputs. this device has power-down protective circuit, preventing device destruction when it is powered down. ? features * operate from 1.65v to 5.5v * inputs accept voltages to 5.5v * i off supports partial-power-down mode * low power dissipation: i cc =10 a (max.) * 24ma output drive(v cc =3.3v) ? ordering information ordering number package packing lead free plating halogen free u74lvc1g79l-al5-r U74LVC1G79G-AL5-R sot-353 tape reel ? marking
u74lvc1g79 cmos ic unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r502-803.a ? pin configuration ? function table (each gate input output clk d q h h l l l x q 0 note: h: high voltage level; l: low voltage level; x: don?t care; : low to high clk transition q 0 : indicates the state of referenced input, one set- up time prior to the low-to-high clk transition ? logic diagram (positive logic)
u74lvc1g79 cmos ic unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r502-803.a ? absolute maximum rating parameter symbol ratings unit supply voltage v cc -0.5 ~ +6.5 v input voltage v in -0.5 ~ +6.5 v output voltage output in the high or low state v out -0.5 ~ v cc +0.5 v output in the high-impedance or powe r -off state -0.5 ~ +6.5 v v cc or gnd current i cc 100 ma continuous output current (v out =0 ~ v cc ) i out 50 ma input clamp current (v in <0) i ik -50 ma output clamp current (v out <0 ) i ok -50 ma storage temperature range t stg -65 ~ +150 c note: absolute maximum ratings are those values beyond 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 test conditions min typ max unit supply voltage v cc operating 1.65 5.5 v data retention only 1.5 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 0.65*v cc v v cc =2.3v~2.7v 1.7 v cc =3.0v~3.6v 2 v cc =4.5v~5.5v 0.7*v cc lo w -level input voltage v il v cc =1.65v~1.95v 0.35*v cc v v cc =2.3v~2.7v 0.7 v cc =3.0v~3.6v 0.8 v cc =4.5v~5.5v 0.3*v cc high-level output current i oh v cc =1.65v -4 ma v cc =2.3v -8 ma v cc =3.0v -16 ma v cc =3.0v -24 ma v cc =4.5v -32 ma lo w -level output current i ol v cc =1.65v 4 ma v cc =2.3v 8 ma v cc =3.0v 16 ma v cc =3.0v 24 ma v cc =4.5v 32 ma input transition rise or fall rate t/ v v cc =1.65v~1.95v, 2.3v~2.7v 20 ns/v v cc =3.0v~3.6v 10 ns/v v cc =4.5v~5.5v 5 ns/v operating temperature t a -40 85 c
u74lvc1g79 cmos ic unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r502-803.a ? electrical characteristics (t a =25c , unless otherwise specified) parameter symbol test conditions min typ max unit high-level output voltage v oh v cc =1.65v~5.5v, i oh =-100 a v cc -0.1 v v cc =1.65v, i oh =-4ma 1.2 v cc =2.3v, i oh =-8ma 1.9 v cc =3.0v, i oh =-16ma 2.4 v cc =3.0v, i oh =-24ma 2.3 v cc =4.5v, i oh =-32ma 3.8 low-level output voltage v ol v cc =1.65v~5.5v, i oh =-100 a 0.1 v v cc =1.65v, i oh =4ma 0.45 v cc =2.3v, i oh =8ma 0.3 v cc =3.0v, i oh =16ma 0.4 v cc =3.0v, i oh =24ma 0.55 v cc =4.5v, i oh =32ma 0.55 input leakage current i i ( leak ) v cc =0v~5.5v, v in =5.5v or gnd 10 a power off leakage current i off v cc =0v, v in or v out =5.5v 10 a quiescent supply current i q v cc =1.65v ~ 5.5v, v in =5.5v or gnd i out =0 10 a additional quiescent supply current i q v cc =3v~5.5v, 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 4 pf ? dynamic characteristics (t a =25c , unless otherwise specified) parameter symbol conditio ns min typ max unit f clock clock frequency 160 mh z pulse duration t w v cc =1.8v0.15v 2.5 ns v cc =2.5v0.2v 2.5 v cc =3.3v0.3v 2.5 v cc =5v0.5v 2.5 setup time before clk t su v cc =1.8v0.15v data in high 2.2 ns v cc =2.5v0.2v 1.4 v cc =3.3v0.3v 1.3 v cc =5v0.5v 1.2 v cc =1.8v0.15v data in low 2.6 v cc =2.5v0.2v 1.4 v cc =3.3v0.3v 1.3 v cc =5v0.5v 1.2 hold time ,data after clk t h v cc =1.8v0.15v, 0.3 ns v cc =2.5v0.2v 0.4 v cc =3.3v0.3v 1 v cc =5v0.5v 0.5
u74lvc1g79 cmos ic unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r502-803.a ? switching characteristic (input: t r , t f 2.5ns; prr 1mhz) see fig. 1 and fig. 2 for test circuit and waveforms. parameter symbol test conditions min typ max unit maximum clock pulse frequency f ma x v cc =1.65v~5.5v 160 mhz propagation delay from input (clk) to output(q) t plh /t phl v cc =1.65v~1.95v,cl=15pf 2.5 9.1 ns v cc =2.3v~2.7v,cl=15pf 1.2 6.0 v cc =3.0v~3.6v,cl=15pf 1.0 4.0 v cc =4.5v~5.5v,cl=15pf 0.8 3.8 propagation delay from input (clk) to output(q) t plh /t phl v cc =1.65v~1.95v,cl=30pf 3.9 9.9 ns v cc =2.3v~2.7v,cl=30pf 2.0 7.0 v cc =3.0v~3.6v,cl=50pf 1.7 5.0 v cc =4.5v~5.5v,cl=50pf 1.0 4.5 ? operating characteristics (t a =25c , unless otherwise specified) parameter symbol test conditions min typ max unit power dissipation capacitance cpd v cc =3.3v, f=10mhz 27 pf
u74lvc1g79 cmos ic unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r502-803.a ? test circuit and waveforms from output c l test circuit r l fig.1 load circuitry for switching times. v cc v in t r ,/t f v m c l r l 1.8v0.15v v cc 2ns v cc /2 15pf 1m ? 30pf 1k ? 2.5v0.2v v cc 2ns v cc /2 15pf 1m ? 30pf 500 ? 3.3v0.3v 3 v 2.5ns 1.5v 15pf 1m ? 50pf 500 ? 5v0.5v v cc 2.5ns v cc /2 15pf 1m ? 50pf 500 ? fig. 2 propagation delay from input to output and input voltage waveforms. note: 1. c l includes probe and jig capacitance. 2. all input pulses are supplied by generat ors having the following characteristics: prr 10mhz, zo = 50 ? .
u74lvc1g79 cmos ic unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r502-803.a 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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