unisonic technologies co., ltd u74ahc377 cmos ic www.unisonic.com.tw 1 of 8 copyright ? 2013 unisonic technologies co., ltd qw-r502-a48.a octal d-type flip-flops with data enable positive-edge trigger ? description the u74ahc377 is a high-speed si-gate cmos device and is compatible with low-power schottky ttl (lsttl). the u74ahc377 has eight edge-trigger ed, d-type flip-flops with individual d inputs and q outputs. a common clock input (clk) loads all flip-flops simultaneously when the data enable input ( en ) is low. the state of each d input, one set-up time before the low-to-high clock trans ition, is transferred to the corresponding output (qn) of the flip-flop. the en input is only required to be stable one set-up time prior to the low-to-high transition for predictable operation. ? features * balanced propagation delays * all inputs have schmitt-trigger actions * inputs accept voltages higher than v cc * ideal for addressable register applications * data enable for address and data synchronization * eight positive-edge triggered d-type flip-flops ? ordering information ordering number package packing lead free halogen free u74ahc373l-s20-t u74ahc373g-s20-t sop-20 tube u74ahc373l-s20-r u74ahc373g-s20-r sop-20 tape reel u74ahc373l-p20-t u74ahc 373g-p20-t tssop-20 tube u74ahc373l-p20-r U74AHC373G-P20-R tssop-20 tape reel
u74ahc377 cmos ic unisonic technologies co., ltd 2 of 8 www.unisonic.com.tw qw-r502-a48.a ? pin configuration ? pin description symbol pin description en 1 data enable input (active low) 1q 2 flip-flop output 1d 3 data input 2d 4 data input 2q 5 flip-flop output 3q 6 flip-flop output 3d 7 data input 4d 8 data input 4q 9 flip-flop output gnd 10 ground (0v) clk 11 clock input (low-to-high, edge triggered) 5q 12 flip-flop output 5d 13 data input 6d 14 data input 6q 15 flip-flop output 7d 16 flip-flop output 7q 17 data input 8d 18 data input 8q 19 flip-flop output v cc 20 supply voltage ? function table inputs output q en clk d h x x q 0 l h h l l l x l x q 0
u74ahc377 cmos ic unisonic technologies co., ltd 3 of 8 www.unisonic.com.tw qw-r502-a48.a ? functional diagram ? logic symbol
u74ahc377 cmos ic unisonic technologies co., ltd 4 of 8 www.unisonic.com.tw qw-r502-a48.a ? logic diagram (positive logic)
u74ahc377 cmos ic unisonic technologies co., ltd 5 of 8 www.unisonic.com.tw qw-r502-a48.a ? absolute maximum rating parameter symbol test conditions min typ max unit supply voltage v cc -0.5 7 v input voltage v i -0.5 7 v v cc or gnd current i cc -75 +75 ma output current i out v o =-0.5v to (v cc +0.5v) -25 +25 ma input clamp current i ik v i <-0.5v -20 ma output clamp current i ok v o <-0.5v or v o > v cc +0.5v -20 +20 ma storage temperature t stg -65 +150 c note: the input and output voltage ratings may be exce eded if the input and output cu rrent ratings are observed. ? recommended operating conditions parameter symbol test conditions min typ max unit supply voltage v cc 2 5 5.5 v input voltage v in 0 5.5 v output voltage v out 0 v cc v input transition rise and fall rate ? t/ ? v v cc =3v ~ 3.6v 100 ns/v v cc =4.5v ~ 5.5v 20 ambient temperature t a -40 +25 +85 c ? thermal data parameter symbol ratings unit junction to ambient sop-20 ja 58 /w tssop-20 83 ? electrical characteristics (t a =25c, unless otherwise specified) parameter symbol test conditions min typ max unit 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 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 0.1 v v cc =3v, i oh =50 a 0 0.1 v cc =4.5v, i oh =50 a 0 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 =0v to 5.5v, v in = 5.5v or gnd 0.1 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 i =v cc or gnd 3 10 pf
u74ahc377 cmos ic unisonic technologies co., ltd 6 of 8 www.unisonic.com.tw qw-r502-a48.a ? dynamic characteristics (t r = t f 3ns, ground=0v, t a =25c, unless otherwise specified) parameter symbol conditions min typ max unit maximum frequency f max v cc =3v to 3.6v, c l =15pf 80 125 ns v cc =3v to 3.6v, c l =50pf 50 75 v cc =4.5v to 5.5v, c l =15pf 125 175 v cc =4.5v to 5.5v, c l =50pf 85 120 propagation delay, from cp to qn t pd v cc =3v to 3.6v, c l =15pf 5.6 12.8 ns v cc =3v to 3.6v, c l= 50pf 8 16 v cc =4.5v to 5.5v, c l =15pf 3.9 9 v cc =4.5v to 5.5v, c l =50pf 5.6 10.5 pulse width cp, from high or low t w v cc =3v to 3.6v 5 ns v cc =4.5v to 5.5v 5 set-up time dn, from en to cp t su v cc =3v to 3.6v 5 ns v cc =4.5v to 5.5v 4.5 hold time dn, from en to cp t h v cc =3v to 3.6v 1.5 ns v cc =4.5v to 5.5v 2 ? operating characteristics (t a =25c , unless otherwise specified) parameter symbol test conditions min typ max unit power dissipation capacitance c pd f=1mhz; v i =gnd to v cc 20 pf note: t plh and t phl are the same as t pd .
u74ahc377 cmos ic unisonic technologies co., ltd 7 of 8 www.unisonic.com.tw qw-r502-a48.a ? test circuit and waveforms
u74ahc377 cmos ic unisonic technologies co., ltd 8 of 8 www.unisonic.com.tw qw-r502-a48.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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