unisonic technologies co., ltd u74ahc574 cmos ic www.unisonic.com.tw 1 of 7 copyright ? 2012 unisonic technologies co., ltd qw-r502-796.a octal edge-triggered d-type flip-flops with 3-state outputs ? description the u74ahc574 is a octal edge-triggered d-type flip-flops with 3-state outputs, and it has 8 channels. when the oe input is low, on the positive transition of the clock (clk) input, the q outputs are set to the logic levels of the data (d) inputs. when the oe input is high, the outputs are in the high-impedance. to ensure the high-impedance st ate during power up or power down, oe should be tied to v cc through a pull-up resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. ? features * operate from 2v to 5.5v * max t pd of 13.2 ns at at v cc =3.3v, c l =15pf * max i cc of 4ua * typical v ol < 0.36v at v cc =4.5v, i o =8ma, t a =25c * typical v oh > 3.94v at v cc =4.5v, i o =-8ma, t a =25c tssop-20 ? ordering information ordering number package packing lead free halogen free u74ahc574l-p20-r u74ahc574g -p20-r tssop-20 tape reel U74AHC574L-P20-T u74ahc 574g-p20-t tssop-20 tube
u74ahc574 cmos ic unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r502-796.a ? pin configuration 9 8 7 6 5 4 3 2 1 18 17 16 14 15 13 12 11 10 19 20 oe 1d 2d 3d 4d 5d 6d 7d 8d gnd clk v cc 1q 3q 5q 6q 7q 8q 4q 2q ? function table inputs(oe) inputs(clk) inputs(d) output(q) l h h l l l l h or l x q 0 h x x z ? logic symbol ? logic diagram
u74ahc574 cmos ic unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r502-796.a ? absolute maximum rating parameter symbol ratings unit supply voltage v cc -0.5 ~ 7 v input voltage v in -0.5 ~ 7 v output voltage v out -0.5 ~ v cc +0.5 v v cc or gnd current i cc 75 ma output current i out 25 ma input clamp current i ik -20 ma output clamp current i ok 20 ma operating temperature t opr -40 ~ + 85 c storage temperature t stg -65 ~ + 150 c note: 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 conditions parameter symbol test conditions min typ max unit supply voltage v cc 2 5.5 v high-level input voltage v ih v cc =2v 1.5 v v cc =3v 2.1 v cc =5.5v 3.85 low-level input voltage v il v cc =2v 0.5 v v cc =3v 0.9 v cc =5.5v 1.65 input voltage v in 0 v cc v output voltage v out high or low state 0 v cc v high-level output current i oh v cc =2v -50 a v cc =3.3v 0.3v -4 ma v cc =5v 0.5v -8 low-level output current i ol v cc =2v 50 a v cc =3.3v0.3v 4 ma v cc =5v0.5v 8 input rise or fall times t r , t f v cc =3.3v0.3v 100 ns v cc =5v0.5v 20 ? electrical characteristics parameter symbol test conditions min typ max unit output voltage high-level v oh v cc =2v, i oh =-50 a 1.9 2 v v cc =3v, i oh =-50 a 2.9 3 v cc =4.5v, i oh =-50 a 4.4 4.5 v cc =3v, i oh =-4ma 2.58 v cc =4.5v, i oh =-8ma 3.94 output voltage low-level v ol v cc =2v, i oh =50 a 0.1 v v cc =3v, i oh =50 a 0.1 v cc =4.5v, i oh =50 a 0.1 v cc =3v, i oh =4ma 0.36 v cc =4.5v, i oh =8ma 0.36 input leakage current i i ( leak ) v cc = 0 ~ 5.5v, v in =5.5v or gnd 0.1 a 3-state leakage current i oz v cc =5.5v, v out = v cc or gnd 0.25 a quiescent supply current i cc v cc =5.5v, v in =v cc or gnd, i out =0 4 a input capacitance c i v cc =5v, v in =v cc or gnd 3 10 pf output capacitance c o v cc =5v, v out =v cc or gnd 3 pf
u74ahc574 cmos ic unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r502-796.a ? switching characteristics (see test circuit and waveforms) parameter symbol test conditions min typ max unit from clk to q t plh /t phl v cc =3.3v0.3v c l =15pf 8.5 13.2 ns c l =50pf 11 16.7 v cc =5v0.5v c l =15pf 5.6 8.6 c l =50pf 7.1 10.6 from oe to q t pzl /t pzh v cc =3.3v0.3 v c l =15pf 8.2 12.8 ns c l =50pf 10.7 16.3 v cc =5v0.5v c l =15pf 5.9 9 c l =50pf 7.4 11 from oe to q t plz /t phz v cc =3.3v 0.3v c l =15pf 8.5 13 ns c l =50pf 11 15 v cc =5v0.5v c l =15pf 5.5 9 c l =50pf 7.1 10.1 maximum clock frequency f max v cc =3.3v 0.3v c l =15pf 80 125 mhz c l =50pf 50 75 v cc =5v0.5v c l =15pf 130 180 c l =50pf 85 115 pulse width t w v cc =3.3v 0.3v 5 ns v cc =5v0.5v 5 setup time t su v cc =3.3v 0.3v 3.5 ns v cc =5v0.5v 3 hold time t h v cc =3.3v 0.3v 1.5 ns v cc =5v0.5v 1.5 ? operating characteristics (t a =25c, unless otherwise specified) parameter symbol test conditions min typ max unit power dissipation capacitance cpd no load, v cc =5v, f=1mhz 28 pf
u74ahc574 cmos ic unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r502-796.a ? test circuit and waveforms test s1 t plh /t phl open t plz /t pzl v load t phz /t pzh gnd v cc input v m v load c l r l v v in t r , t f 3.3v0.3v v cc 3ns v cc /2 v cc 15pf 1k ? 0.3v 50pf 5v0.5v v cc 3ns v cc /2 v cc 15pf 1k ? 0.5v 50pf v m v m v in 0v setup and hold times t su v m timing input data input t h
u74ahc574 cmos ic unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r502-796.a ? test circuit and waveforms(cont.) note: 1. c l includes probe and jig capacitance. 2. p rr 1mhz, z o = 50 ? , t r 3ns, t f 3ns.
u74ahc574 cmos ic unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r502-796.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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