unisonic technologies co., ltd u74lvc2g240 cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2010 unisonic technologies co., ltd qw-r502-433.a dual buffer/driver with 3-state outputs ? description the u74lvc2g240 is a dual buffer or driver with 3-state outputs. it is designed for 1. 65v to 5.5v operation. the u74lvc2g240 is composed of two 1-bit buffers/drivers with separate output-enable ( oe ) inputs. when oe is low, data passes from a (input) to y (output). when oe is high, the outputs are in the hi gh-impedance state. to ensure the high-impedance st ate during power up or power down, oe should be tied to v cc through a pull-up resistor, and the minimum value of the re sistor is determined by the current-sinking capab ility of the driver. the u74lvc2g240 is fully specified for partial-power-down applications using i off . the i off circuitry disables the outputs and prevents damaging current backflow through the device when it is powered down. ? features * wide supply voltage range from 1.65v to 5.5v * max t pd of 4.6 ns at 3.3v * up to 5.5v inputs accept voltages * low power consumption, i cc = 10 a (max.) * 24 ma output driver at 3.3v * typical v olp (output ground bounce) < 0.8v, v cc = 3.3 v, t a = 25 * typical v ohv (output v oh undershoot) > 2v, v cc = 3.3 v, t a = 25 tssop-8 ? ordering information ordering number package packing U74LVC2G240G-P08-R tssop-8 tape reel (1) r: tape reel (2) p08:tssop-8 (3) g: halogen free u74lvc2g240g -p08 -r (1) packing type (2) package type (3) halogen free
u74lvc2g240 cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-433.a ? pin configuration ? function table (each buffer) inputs output oe a y l h l l l h h x z ? logic diagram (positive logic) 1a 1y 1oe 1 2 6 2a 2y 2oe 7 5 3
u74lvc2g240 cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-433.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 output voltage ( any output in the high-impedance or power-off state) v out -0.5~6.5 v output voltage (any output in the high or low state) v out -0.5~v cc +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. the input and output voltage ratings may be exceeded if the input and output curr ent ratings are observed. 2. 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 junction to ambient ja 190 c /w ? recommended operating conditions parameter symbol conditions min typ max unit operating 1.65 5.5 supply voltage v cc data retention only 1.5 v v cc = 1.65v to 1.95v 0.65* v cc v cc = 2.3v to 2.7v 1.7 v cc = 3v to 3.6v 2 high-level input voltage v ih v cc = 4.5v to 5.5v 0.7* v cc v v cc = 1.65v to 1.95v 0.35* v c c v cc = 2.3v to 2.7v 0.7 v cc = 3v to 3.6v 0.8 low-level input voltage v il v cc = 4.5v to 5.5v 0.3* v cc v input voltage v in 0 5.5 v high or low state 0 v cc output voltage v out 3-state 0 5.5 v v cc =1.65v -4 v cc =2.3v -8 -16 v cc =3v -24 high-level output current i oh v cc =4.5v -32 ma v cc =1.65v 4 v cc =2.3v 8 16 v cc =3v 24 low-level output current i ol v cc =4.5v 32 ma v cc =1.80.15v, 2.50.2v 20 v cc =3.30.3v 10 input transition rise or fall rate t r / t f v cc =5.0+0.5v 5 ns/ v operating temperature t opr -40 85 c
u74lvc2g240 cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-433.a ? electrical characteristics ( t a =25 c , v cc = 3.3 v, unless otherwise specified) parameter symbol test conditions min typ max unit i oh = -100 av cc = 1.65v to 5.5v v cc -0.1 i oh = -4 ma v cc = 1.65v 1.2 i oh = -8 ma v cc = 2.3v 1.9 i oh = -16 ma v cc = 3v 2.4 i oh = -24 ma v cc = 3v 2.3 high-level output voltage v oh i oh = -32 ma v cc = 4.5v 3.8 v i ol = 100 av cc = 1.65v to 5.5v 0.1 i ol = 4 ma v cc = 1.65v 0.45 i ol = 8 ma v cc = 2.3v 0.3 i ol = 16 ma v cc = 3v 0.4 i ol = 24 ma v cc = 3v 0.55 low-level output voltage v ol i ol = 32 ma v cc = 4.5v 0.55 v input leakage current (a or oe inputs) i i(leak) v in = 5.5v or gnd, v cc = 0 to 5.5v 5 a off-state current i off v in or v o = 5.5v, v cc = 0v 10 a high-impedance state current i oz v o = 0 to 5.5v, v cc = 3.6v 10 a quiescent supply current i q v in = 5.5v or gnd, i out = 0, v cc = 1.65v to 5.5v 10 a a dditional quiescent supply current i q one input at v cc ? 0.6v; other inputs at v cc or gnd; v cc =3v to 5.5v 500 a input capacitance c in v in = v cc or gnd, v cc =3.3v 4 pf output capacitance c out v out = v cc or gnd, v cc =3.3v 6 pf ? switching characteristics ( t a =25 c ) parameter symbol test conditions min typ max unit v cc =1.80.15v, r l =1k ? 2 11.3 v cc =2.50.2v, r l =500 ? c l =30pf 1.4 5.5 v cc =3.30.3v, r l =500 ? 1.1 4.6 propagation delay from input a to output y t plh / t phl (t pd ) v cc =50.5v, r l =500 ? r l =500 ? c l =50pf 1 4 ns v cc =1.80.15v, r l =1k ? 2.7 11.7 v cc =2.50.2v, r l =500 ? c l =30pf 1.9 6.6 v cc =3.30.3v 1.4 5.4 propagation delay from input oe to output y t pzl / t pzh (t en ) v cc =50.5v r l =500 ? c l =50pf 1.1 5 ns v cc =1.80.15v, r l =1k ? 1.7 12.8 v cc =2.50.2v, r l =500 ? c l =30pf 0.8 5.7 v cc =3.30.3v 1.2 5.5 propagation delay from input oe to output y t plz / t phz (t dis ) v cc =50.5v r l =500 ? c l =50pf 0.5 4.2 ns ? operating characteristics ( t a =25 c ) parameter symbol test conditions min typ max unit v cc = 1.8v v cc = 2.5v v cc = 3.3v 15 outputs enabled v cc = 5v f=10mhz 17 pf v cc = 1.8v 1 v cc = 2.5v 1 v cc = 3.3v 2 power dissipation capacitance per buffer/driver c pd outputs disabled v cc = 5v f=10mhz 2 pf
u74lvc2g240 cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-433.a ? test circuit and waveforms inputs v cc v in t r , t f v m v load 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 3.3v0.3v 3v 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 notes: 1. c l includes probe and jig capacitance. 2. all input pulses are supplied by generator s having the following characteristics: prr 10mhz, z o = 50 ? . test s1 t plh /t phl open t plz /t pzl v load t phz /t pzh gnd
u74lvc2g240 cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-433.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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