unisonic technologies co., ltd U74LVC640 cmos ic www.unisonic.com.tw 1 of 5 copyright ? 2010 unisonic technologies co., ltd qw-r502-412.a octal bus transceiver with 3-state inverting outputs ? description the U74LVC640 is designed for asynchronous communication between data buses and has in verting outputs. while the direction-control(dir) input is high, data transmits from the a bus to the b bus. in contrast, data transmits from the b bus to the a bus dir input is low. the output-enable(oe) will disable the device and isolate from the buses when high voltage is applied on it. ? features * supply voltage range from 1.2v to 3.6v * input accept voltages up to 5.5v * partial-power-down mode operation * max t pd is 6.3ns at 3.3v tssop-20 ? ordering information ordering number package packing U74LVC640g-p20-r tssop-20 tape reel
U74LVC640 cmos ic unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r502-412.a ? pin configuration 1 2 3 4 5 6 7 16 15 14 13 12 11 gnd v cc dir a1 8 9 10 19 18 17 oe a2 a3 a4 a5 a6 a7 a8 b1 b2 b3 b4 b5 b6 b7 b8 20 ? function table input oe dir function h x isolation l h transmit data from a bus to b bus, b=a l l transmit data from b bus to a bus, a=b note: h: high voltage level l: low voltage level x : don?t care ? logic diagram (negative logic)
U74LVC640 cmos ic unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r502-412.a ? absolute maximum rating parameter symbol ratings unit supply voltage v cc -0.5~6.5 v input voltage v in -0.5~ 6.5 v voltage applied to ou tput in high-impedanc e or power-off state -0.5~6.5 voltage applied to output in high or low state v out -0.5~vcc+0.5 v input clamp current i ik -50 ma output clamp current i ok -50 ma output current i out 50 ma v cc or gnd current i cc 100 ma storage temperature t stg -65 ~ +150 c note: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. ? operating characteristics parameter symbol test conditions typ unit v cc =1.8v 42 v cc =2.5v 43 ? =0 f=10mhz v cc =3.3v 45 v cc =1.8v 1 v cc =2.5v 1 power dissipation capacitance per transceiver c pd ? =1 f=10mhz v cc =3.3v 2 pf ? recommended operating conditions parameter symbol test conditions min typ max unit operating 1.65 3.6 supply voltage v cc data retention only 1.5 v v cc = 1.65 v ~ 1.95 v 0.65*vcc v cc = 2.3 v ~ 2.7 v 1.7 high-level input voltage v ih v cc = 2.7 v ~ 3.6 v 2 v v cc = 1.65 v ~ 1.95 v 0.35*vcc v cc = 2.3 v ~ 2.7 v 0.7 low-level input voltage v il v cc = 2.7 v ~ 3.6 v 0.8 v input voltage v in 0 5.5 v output voltage v out 0 vcc v v cc = 1.65 v -4 v cc = 2.3 v -8 v cc = 2.7 v -12 output high current i oh v cc = 3 v -24 ma v cc = 1.65 v 4 v cc = 2.3 v 8 v cc = 2.7 v 12 output low current i ol v cc = 3 v 24 ma
U74LVC640 cmos ic unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r502-412.a ? electrical characteristics parameter symbol test conditions min typ max unit i oh = ?100 a,v cc =1.65 v to 3.6 v vcc-0.2 i oh = ?4ma, v cc =1.65v 1.29 i oh = ?8ma , v cc =2.3v 1.9 i oh = ?12ma , v cc =2.7v 2.2 i oh = ?12ma , v cc =3v 2.4 high-level output voltage v oh i oh = ?24ma , v cc =3v 2.3 v i oh = 100 a, v cc =1.65 v to 3.6 v 0.1 i oh = 4ma, v cc =1.65v 0.24 i oh = 8ma, v cc =2.3v 0.3 i oh = 12ma , v cc =2.7v 0.4 low-level output voltage v ol i oh = 24ma , v cc =3v 0.55 v input current i i(leak) v in = 5.5 v or gnd , v cc =3.6v 1 a power off leakage current i off v in = 5.5 v or gnd , v cc =0v 1 a output off-state current i oz v out = 0 to 5.5 v , v cc =3.6v 1 a v in =v cc or gnd,i out =0,v cc =3.6v 1 a quiescent supply current i q v in =3.6~5.5v,iout=0,v cc =3.6v 1 a a dditional quiescent current per input pin i q v cc =2.7v ~ 3.6v, v in = v cc -0.6v, i out =0 500 a ? switching characteristics parameter symbol test conditions min typ max unit v cc =1.8 v 0.15 v 1 6 12.2 v cc =2.5 v 0.2 v 1 3.9 7.8 v cc =2.7 v 1 4.2 7.1 propagation delay (from a to b or from b to a) t plh / t phl v cc =3.3 v 0.3 v 1.5 3.8 6.1 ns v cc =1.8 v 0.15 v 1 7 14.8 v cc =2.5 v 0.2 v 1 4.5 10 v cc =2.7 v 1 5.4 9.3 3-state output enable time ( from ? to a or b) t pzh / t pzl v cc =3.3 v 0.3 v 1.5 4.4 8.3 ns v cc =1.8 v 0.15 v 1 7.8 16.5 v cc =2.5 v 0.2 v 1 4 9 v cc =2.7 v 1 4.4 8.3 3-state output disable time ( from ? a to a or b) t plz / t plh v cc =3.3 v 0.3 v 1.7 4.1 7.3 ns
U74LVC640 cmos ic unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r502-412.a ? test circuit and waveforms from output r l v load gnd open s test t plh /t phl t phz /t pzh t plz /t pzl s open gnd v load c l r l inputs v cc v in t r /t f v m v c l r l v load 1.8v 0.15v v cc 2ns v cc /2 0.15v 30 pf 1 k ? 2 x v cc 2.5v 0.2v v cc 2ns v cc /2 0.15v 30 pf 500 ? 2 x v cc 2.7 v 2.7 v 2.5ns 1.5v 0.3v 50 pf 500 ? 6v 3.3v 0.3v 2.7 v 2.5ns 1.5v 0.3v 50 pf 500 ? 6v note: c l includes probe and jig capacitance. all input pulses are supplied by generators having the following characteristics: prr 10mhz, zo = 50 ? . 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.
|
