unisonic technologies co., ltd U74HC373 cmos ic www.unisonic.com.tw 1 of 5 copyright ? 2010 unisonic technologies co., ltd qw-r502-296.b octal d-type transparent latch ? description the U74HC373 consists of eight d-type transparent latches with 3-state outputs. when letch-enable (l e) is high, the latches operate at the transparent mode, and t he latches? output will change corresponding with the data present at d0 to d7. when output-enable (oe) is low, the contents of the latches will be present at the outputs. the out puts will be in the high impedance when oe goes high. ? features * operation voltage range: 2~6v * drive up to 15 lsttl loads * 3-state outputs * output capability suitable for bus driving ? ordering information ordering number lead free halogen free package packing U74HC373l-s20-r U74HC373g-s20-r sop-20 tape reel U74HC373l-p20-r U74HC373g-p20-r tssop-20 tape reel
U74HC373 cmos ic unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r502-296.b ? pin configuration ? function table inputs( oe ) inputs(le) inputs(d) output(q) l h h h l h l l l l x q 0 h x x z note: h: high voltage level; l: low voltage level. ? logic symbol ? logic diagram
U74HC373 cmos ic unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r502-296.b ? absolute maximum rating parameter symbol ratings unit supply voltage v cc -0.5 ~ 7 v v cc or gnd current i cc 70 ma output current i out 35 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. ? thermal data parameter symbol ratings unit sop-20 60 junction to ambient tssop-20 ja 83 c/w ? recommended operating conditions parameter symbol test conditions min typ max unit supply voltage v cc 2 5 6 v v cc =2.0v 1.5 v cc =4.5v 3.15 high-level input voltage v ih v cc =6.0v 4.2 v v cc =2.0v 0 0.5 v cc =4.5v 0 1.35 low-level input voltage v il v cc =6.0v 0 1.8 v input voltage v in 0 v cc v output voltage v out high or low state 0 v cc v v cc =2.0v 1 v cc =4.5v 0.5 input rise or fall times t r , t f v cc =6.0v 0.4 s ? electrical characteristics ( t a =25c ) parameter symbol test conditions min typ max unit v cc =2.0v 1.9 1.998 v cc =4.5v 4.4 4.499 v cc =6.0v i oh =-20 a, v in =v ih or v il 5.9 5.999 v cc =4.5v, i oh =-6ma, v in =v ih or v il 3.98 4.3 output voltage high-level v oh v cc =6.0v, i oh =-7.8ma, v in =v ih or v il 5.48 5.8 v v cc =2.0v 2 100 v cc =4.5v 1 100 v cc =6.0v i oh =-20 a, v in =v ih or v il 1 100 v cc =4.5v, i ol =6ma, v in =v ih or v il 170 260 output voltage low-level v ol v cc =6.0v, i ol =7.8ma, v in =v ih or v il 150 260 mv input leakage current i i(leak) v cc =6.0v, v in =v cc or 0 0.1 100 na disable output leakage current i oz v cc =6.0v, v out =v cc or 0 0.01 0.5 a quiescent supply current i q v cc =6.0v, v in =v cc or 0, i out =0 8 a input capacitance c in v cc =2.0v~6.0v 3 10 pf
U74HC373 cmos ic unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r502-296.b ? switching characteristics (see test circuit and waveforms) parameter symbol test conditions min typ max unit v cc =2.0v 58 150 v cc =4.5v 15 30 v cc =6.0v c l =50pf 13 26 v cc =2.0v 82 200 v cc =4.5v 22 40 from d to q v cc =6.0v c l =150pf 19 34 v cc =2.0v 73 175 v cc =4.5v 18 35 v cc =6.0v c l =50pf 15 30 v cc =2.0v 100 225 v cc =4.5v 24 45 from le to q t plh /t phl v cc =6.0v c l =150pf 20 38 ns v cc =2.0v 65 150 v cc =4.5v 17 30 v cc =6.0v c l =50pf 14 26 v cc =2.0v 90 200 v cc =4.5v 23 40 from oe to q t pzl /t pzh v cc =6.0v c l =150pf 19 34 ns v cc =2.0v 50 150 v cc =4.5v 15 30 from oe to q t plz /t phz v cc =6.0v c l =50pf 13 26 ns v cc =2.0v 28 60 v cc =4.5v 8 12 to q t t v cc =6.0v c l =150pf 6 10 ns v cc =2.0v 80 v cc =4.5v 16 pulse width t w v cc =6.0v 14 ns v cc =2.0v 50 v cc =4.5v 10 setup time t su v cc =6.0v 9 ns v cc =2.0v 20 v cc =4.5v 10 hold time t h v cc =6.0v 10 ns ? operating characteristics (t a =25 ) parameter symbol test conditions min typ max unit power dissipation capacitance c pd no load 100 pf
U74HC373 cmos ic unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r502-296.b ? test circuit and waveforms r l c l s 1 s 2 t pzh open closed t pzl 1k ? 50pf, 150pf closed open t phz open closed t plz 1k ? 50pf closed open t phl t plh - 50pf, 150pf open open note: c l includes probe and jig capacitance. prr Q 1mhz, zo=50 ? , t r =6ns, t f =6ns 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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