unisonic technologies co., ltd u74lvc2g126 cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2011 unisonic technologies co., ltd qw-r502-231.c dual bus buffer gate with 3-state outputs ? description the u74lvc2g126 consists of two bus buffers with 3-state output controlled by enable input (noe ) , when noe is low, the output is disabling. inputs can be driven from either 3.3v or 5v devices, so the device can be used in a mix 3.3v/5v system. this device is full specified for partial power-down protective circuit, preventing the backflow current through the device when it is powered down. ? features * operation voltage range: 1.65~5.5v * support 5v v cc operation * low power dissipation * input accept voltage to 5.5v tssop-8 msop-8 ? ordering information ordering number package packing lead free halogen free u74lvc2g126l-p08-r u74lvc2g12 6g-p08-r tssop-8 tape reel u74lvc2g126l-p08-t u74lvc 2g126g-p08-t tssop-8 tube u74lvc2g126l-sm1-r u74lvc2g126g-sm1-r msop-8 tape reel u74lvc2g126l-sm1-t u74lvc2g126g-sm1-t msop-8 tube
u74lvc2g126 cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-231.c ? pin configuration 4 3 2 5 7 1a 2y gnd 2a 2oe 1 6 1y 8 v cc 1oe ? function table (each gate) input(noe) input(a) output(y) h l l h h h l x z ? logic diagram (positive logic)
u74lvc2g126 cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-231.c ? absolute maximum rating (unless otherwise specified) parameter symbol ratings unit supply voltage v cc -0.5~6.5 v input voltage v in -0.5~6.5 v output voltage enable v out -0.5~v cc +0.5 v disable -0.5~6.5 v power-down -0.5~6.5 v v cc or gnd current i cc 100 ma input clamp current(v in < 0) i ik -50 ma output clamp current(v out < 0) i ok 50 ma output current i out 50 ma power dissipation p d 300 mw storage temperature t stg -65 ~ +150 c note: absolute maximum ratings are those values beyo nd 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 conditions min typ max unit supply voltage v cc 1.65 5.5 v input voltage v in 0 5.5 v output voltage enable v out v cc =1.65~5.5v 0 v cc v disable v cc =1.65~5.5v 0 5.5 v power-down v cc =0v 0 5.5 v input transition rise or fall rate t r , t f v cc =1.65~2.7v 0 20 ns/v v cc =2.7~5.5v 0 10 ns/v operating temperature t a -40 125 c ? static characteristics (t a =25 c) parameter symbol test conditions min typ max unit positive-going input threshold voltage v t+ v cc =1.65v~1.95v 0.65v cc v v cc =2.3v~2.7v 1.7 v v cc =2.7v~3.6v 2 v v cc =4.5v~5.5v 0.7v cc v negative-going input threshold voltage v t- v cc =1.65v~1.95v 0.35v cc v v cc =2.3v~2.7v 0.7 v v cc =2.7v~3.6v 0.8 v v cc =4.5v~5.5v 0.3v cc v high-level output voltage v oh v cc =1.65v~5.5v, i oh =-100 a v cc ? 0.1 v v cc =1.65v, i oh =-4ma 1.2 v v cc =2.3v, i oh =-8ma 1.9 v v cc =2.7v, i oh =-12ma 2.2 v v cc =3v, i oh =-24ma 2.3 v v cc =4.5v, i oh =-32ma 3.8 v low-level output voltage v ol v cc =1.65v~5.5v, i ol =100 a 0.1 v v cc =1.65v, i ol =4ma 0.45 v v cc =2.3v, i ol =8ma 0.3 v v cc =2.7v, i ol =12ma 0.4 v v cc =3v, i ol =24ma 0.55 v v cc =4.5v, i ol =32ma 0.55 v input leakage current i i ( leak ) v cc =5.5v, v in =5.5v or gnd 0.1 5 a output off -state current i oz v cc =3.6v, v out =v cc or gnd 0.1 10 a power off leakage current i off v cc =0v, v in or v out =5.5v 0.1 10 a
u74lvc2g126 cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-231.c ? static characteristics(cont.) parameter symbol test conditions min typ max unit quiescent supply current i q v cc =5.5v, v in =v cc or gnd i out =0 0.1 10 a additional quiescent supply current i q v cc =2.3v~5.5v, one input at v cc - 0.6v, other inputs at v cc or gnd 5 500 a input capacitance c in v in =v cc or gnd 2 pf ? dynamic characteristics parameter symbol test conditions min typ max unit propagation delay from input( a ) to output(y) t phl /t plh v cc =1.8v0.15v 1 3.9 9.8 ns v cc =2.5v0.2v 0.5 2.6 4.9 ns v cc =2.7v 1 2.8 4.7 ns v cc =3.3v0.3v 0.5 2.4 4.3 ns v cc =5.0v0.5v 0.5 1.9 3.2 ns propagation delay from input(noe) to output(y) t pzh /t pzl v cc =1.8v0.15v 1.0 4.1 10 ns v cc =2.5v0.2v 1.0 2.6 5 ns v cc =2.7v 1.0 2.8 4.7 ns v cc =3.3v0.3v 1.0 2.4 4.1 ns v cc =5.0v0.5v 0.5 1.8 3.1 ns propagation delay from input(noe) to output(y) t plz /t phz v cc =1.8v0.15v 1 3.3 12.6 ns v cc =2.5v0.2v 0.5 1.9 5.7 ns v cc =2.7v 1 3.0 4.8 ns v cc =3.3v0.3v 1 2.5 4.4 ns v cc =5.0v0.5v 0.5 1.8 3.3 ns ? operating characteristics (t a =25 c) parameter symbol test conditions min typ max unit power dissipation capacitance c pd output enable 17 pf output disable 5 pf
u74lvc2g126 cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-231.c ? test circuit and waveforms c l (note) r l from output r l v ext gnd open s test t plh /t phl t phz /t pzh t plz /t pzl s open gnd v ext note : c l includes probe and jig capacitance. v cc v in t r , t f v m v ext c l r l v 1.8v0.15v v cc 2ns v cc /2 2* v cc 30pf 1k ? 0.15v 2.5v0.2v v cc 2ns v cc /2 2* v cc 30pf 500 ? 0.15v 2.7v 2.7v 2.5ns 1.5v 6v 50pf 500 ? 0.3v 3.3v0.3v 2.7 v 2.5ns 1.5v 6v 50pf 500 ? 0.3v 5v0.5v v cc 2.5ns v cc /2 2* v cc 50pf 500 ? 0.3v output t phz t pzh t plz t pzl v oh -v v m v m output v m v m v ol +v v oe
u74lvc2g126 cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-231.c 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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