unisonic technologies co., ltd U74HC541 cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2010 unisonic technologies co., ltd qw-r502-395.a octal buffers and line drivers with 3-state outputs ? description the U74HC541 is a octal buffers and line drivers with 3-state outputs and 8 channels. ? features * operate from 2v to 6v * max t pd of 23ns at 4.5 v(c l =50pf) * typical v ih < 3.15v at v cc =4.5v, t a =25c * typical v il > 1.35v at v cc =4.5v, t a =25c tssop-20 ? ordering information ordering number package packing U74HC541g-p20-r tssop-20 tape reel U74HC541g-p20-t tssop-20 tube
U74HC541 cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-395.a ? pin configuration 9 8 7 6 5 4 3 2 1 18 17 16 14 15 13 12 11 10 19 20 oe1 a1 a2 a3 a4 a5 a6 a7 a8 gnd y8 v cc y2 y4 y5 y6 y7 y3 y1 oe2 ? function table inputs( oe1 ) inputs( oe2 ) inputs(a) output(y) l l l l l l h h h x x z x h x z note: h: high voltage level l: low voltage level z : high impedance x : don?t care
U74HC541 cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-395.a ? logic symbol ? logic diagram a2 a1 y2 y1 1 19 2 317 18 to six other channels oe1 oe2
U74HC541 cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-395.a ? 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. ? recommended operating conditions parameter symbol test conditions min typ max unit supply voltage v cc 2 6 v v cc =2v 1.5 v cc =4.5v 3.15 high-level input voltage v ih v cc =6v 4.2 v v cc =2v 0.5 v cc =4.5v 1.35 low-level input voltage v il v cc =6v 1.8 v input voltage v in 0 v cc v output voltage v out 0 v cc v v cc =2v 1000 v cc =4.5v 500 input transition rise or fall rate t r ,t f v cc =6v 400 ns ? electrical characteristics (t a =25 ) parameter symbol test conditions min typ max unit v cc =2v, i oh =-20 a 1.9 1.998 v cc =4.5v, i oh =-20 a 4.4 4.499 v cc =6v, i oh =-20 a 5.9 5.999 v cc =4.5v, i oh =-6ma 3.98 4.3 output voltage high-level v oh v cc =6v, i oh =-7.8ma 5.48 5.8 v v cc =2v, i ol =20 a 0.002 0.1 v cc =4.5v, i ol =20 a 0.001 0.1 v cc =6v, i ol =20 a 0.001 0.1 v cc =4.5v, i ol =6m a 0.17 0.26 output voltage low-level v ol v cc =6v, i ol =7.8m a 0.15 0.26 v input leakage current i i(leak) v cc =6v, v in = v cc or gnd 0.1 100 na output off-state current i oz v cc =6v, v out = v cc or gnd 0.01 0.5 a quiescent supply current i q v cc =6v, v in =v cc or gnd, i out =0 8 a input capacitance c in v cc =2v to 6v 3 10 pf
U74HC541 cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-395.a ? switching characteristics (t a =25 ,c l =50pf) parameter symbol test conditions min typ max unit v cc =2v 40 115 v cc =4.5v 12 23 propagation delay from input (a) to output (y) t plh /t phl v cc =6v 10 20 ns v cc =2v 80 150 v cc =4.5v 17 30 output enable time from oe to y t pzl /t pzh v cc =6v 15 26 ns v cc =2v 40 150 v cc =4.5v 18 30 output disable time from oe to y t plz /t phz v cc =6v 17 26 ns v cc =2v 28 60 v cc =4.5v 8 12 output y t t v cc =6v 6 10 ns ? switching characteristics (t a =25 ,c l =150pf) parameter symbol test conditions min typ max unit v cc =2v 65 165 v cc =4.5v 16 33 propagation delay from input (a) to output (y) t plh /t phl v cc =6v 14 28 ns v cc =2v 100 200 v cc =4.5v 20 40 output enable time from oe to y t pzl /t pzh v cc =6v 17 34 ns v cc =2v 45 210 v cc =4.5v 17 42 output y t t v cc =6v 13 36 ns ? operating characteristics (t a =25 ) parameter symbol test conditions min typ max unit power dissipation capacitance c pd no load 35 pf
U74HC541 cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-395.a ? test circuit and waveforms parameter rl cl t pzh t en t pzl 1k ? 50 pf or 150 pf t pzh t dis t pzl 1k ? 50 pf t pd or t t 50 pf or 150 pf p lh t phl t p zl t pzh t plz t phz t note: c l includes probe and jig capacitance. all input pulses are supplied by generators having the following characteristics: prr 1mhz, zo = 50 ? , tr=6ns, tf=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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