unisonic technologies co., ltd u74ahc374 cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2011 unisonic technologies co., ltd qw-r502-647.a octal edge-triggered d-type flip-flops with 3-state outputs ? description the u74ahc374 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 posit ive 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 state 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 12.7ns at v cc =3.3v, c l =15pf * max i cc of 4ua * typ v ol < 0.36v at v cc =4.5v,i o =8ma,t a =25c * typ v oh > 3.94v at v cc =4.5v,i o =-8ma, t a =25c tssop-20 ? ordering information ordering number lead free halogen free package packing U74HC374L-P20-R u74hc374g-p20-r tssop-20 tape reel u74hc374l-p20-t u74hc374g-p20-t tssop-20 tube
u74ahc374 cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-647.a ? pin configuration ? function table inputs( oe ) inputs(clk) inputs(d) output(q) l h h l l l l h or l x q0 h x x z ? logic symbol 1 3 4 7 8 13 14 17 18 11 19 16 15 12 9 6 5 2 1q 2q 8q clk 3q 4q 5q 6q 7q 2d 3d 4d 5d 6d 7d 8d 1d 1d en c1 oe ? logic diagram
u74ahc374 cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-647.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 storage temperature t stg -65 ~ + 150 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 v cc =2v 1.5 v cc =3v 2.1 high-level input voltage v ih v cc =5.5v 3.85 v v cc =2v 0.5 v cc =3v 0.9 low-level input voltage v il v cc =5.5v 1.65 v input voltage v in 0 v cc v output voltage v out high or low state 0 v cc v v cc = 2 v -50 a v cc = 3.3 v 0.3 v -4 high - level output current i oh v cc = 5 v 0.5 v -8 ma v cc = 2 v 50 a v cc = 3.3 v 0.3 v 4 low - level output current i ol v cc = 5 v 0.5 v 8 ma v cc = 3.3 v 0.3 v 100 input rise or fall times t r , t f v cc = 5 v 0.5 v 20 ns ? electrical characteristics (t a =25 ) parameter symbol test conditions min typ max unit v cc =2v, i oh =-50 a 1.9 2 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 output voltage high-level v oh v cc =4.5v, i oh =-8ma 3.94 v v cc =2v, i oh =50 a 0.1 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 output voltage low-level v ol v cc =4.5v, i oh =8ma 0.36 v input leakage current i i(leak) v cc = 0 to 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 4 10 pf output capacitance c o v cc =5v, v out =v cc or gnd 6 pf
u74ahc374 cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-647.a ? switching characteristics (see test circuit and waveforms) parameter symbol test conditions min typ max unit c l =15pf 8.1 12.7 v cc = 3.3v 0.3v c l =50pf 10.6 16.2 c l =15pf 5.4 8.1 from clk to q t plh /t phl v cc = 5v 0.5v c l =50pf 6.9 10.1 ns c l =15pf 7.1 11 v cc = 3.3v 0.3v c l =50pf 9.6 14.5 c l =15pf 5.1 7.6 from oe to q t pzl /t pzh v cc = 5v 0.5v c l =50pf 6.6 9.6 ns c l =15pf 7.5 10.5 v cc = 3.3v 0.3v c l =50pf 10.2 14 c l =15pf 4.6 6.8 from oe to q t plz /t phz v cc = 5v 0.5v c l =50pf 6.1 8.8 ns c l =15pf 80 130 v cc = 3.3v 0.3v c l =50pf 55 85 c l =15pf 130 185 maximum clock frequency f max v cc = 5v 0.5v c l =50pf 85 120 mhz v cc = 3.3 v 0.3 v 5 pulse width t w v cc = 5 v 0.5 v 5 ns v cc = 3.3 v 0.3 v 4.5 setup time t su v cc = 5 v 0.5 v 3 ns v cc = 3.3 v 0.3 v 2 hold time t h v cc = 5 v 0.5 v 2 ns ? operating characteristics (t a =25 ) parameter symbol test conditions ratings unit power dissipation capacitance c pd no load, v cc = 5 v , f=1mhz 32 pf
u74ahc374 cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-647.a ? test circuit and waveforms test s1 t plh /t phl open t plz /t pzl v load t phz /t pzh gnd input v cc v in t r , t f v m v load c l r l v 15pf 3.3v0.3v v cc 3ns v cc /2 v cc 50pf 1k ? 0.3v 15pf 5v0.5v v cc 3ns v cc /2 v cc 50pf 1k ? 0.5v v m v in 0 v pulse duration t w input v m v in 0v setup and hold times t su v m timing input data input t h v m v m
u74ahc374 cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-647.a ? test circuit and waveforms(cont.) v m v in 0v v oh v ol voltage waveforms propagation delay times input output t plh t phl t plh t phl output v m v m v m v m v m v oh v ol note: a. c l includes probe and jig capacitance. note: b. p rr 1mhz, z o = 50 ? , t r 3ns, t f 3ns. 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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