unisonic technologies co., ltd u74lvc2g19 cmos ic www.unisonic.com.tw 1 of 5 copyright ? 2012 unisonic technologies co., ltd qw-r502-792.a 1-of-2 decoder/demultiplexer ? description the u74lvc1g19 is a 1-of-2 decoder / demultiplexer with a common output enable. this device buffers the data on input a and passes it to the outputs 1y and 2y when the enable input signal is low. this device is fully specified for partial power-down applications using ioff. the ioff circuitry disa bles the outputs, preventing the damaging backflow current through the device when it is powered down. ? features * operate from 1.65v to 5.5v * inputs accept voltages to 5.5v * low power dissipation, i cc =10 a (max) * 24ma output drive(v cc =3v) ? ordering information ordering number package packing lead free halogen free u74lvc1g19l-al6-r U74LVC1G19G-AL6-R sot-363 tape reel u74lvc1g19l-al6-r (1)packing type (2)package type (3)lead free (1) r: tape reel (2) al6: sot-363 (3) halogen free, l: lead free ? marking
u74lvc1g19 cmos ic unisonic technologies co., ltd 2 of 5 www.unisonic.com.tw qw-r502-792.a ? pin configuration ? pin description symbol pin description a 1 data input gnd 2 ground(0v) e 3 enable input 2y 4 data output vcc 5 supply voltage 1y 6 data output ? function table input output e a 1y 2y l l l h l h h l h x h h note: h: high voltage level; l: low voltage level ? logic diagram (positive logic) 1a 3e 1y 2y 6 4 iec logic symbol
u74lvc1g19 cmos ic unisonic technologies co., ltd 3 of 5 www.unisonic.com.tw qw-r502-792.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 output in the high or low state v out -0.5 ~ v cc +0.5 v output in the high-impedance or power-off state -0.5 ~ +6.5 v v cc or gnd current i cc 100 ma continuous output current (v out =0 to v cc) i out 50 ma input clamp current (v in <0) i ik -50 ma output clamp current (v out <0) i ok -50 ma storage temperature range t stg -65 ~ +150 c note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device operation is not implied. ? recommended operating conditions parameter symbol test conditions min typ max unit supply voltage v cc operating 1.65 5.5 v input voltage v in 0 5.5 v output voltage v out high or low state 0 v cc v operating temperature t a -40 85 c input transition rise or fall rate t/ v v cc =1.8v 0.15v, 2.5v 0.2v 20 ns/v v cc =3.0v 0.3v 10 ns/v v cc =5v 0.5v 5 ns/v
u74lvc1g19 cmos ic unisonic technologies co., ltd 4 of 5 www.unisonic.com.tw qw-r502-792.a ? electrical characteristics (t a =25c , unless otherwise specified) parameter symbol test conditions min typ max unit high-level input voltage v ih v cc =1.65v ~ 1.95v 0.65*v 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 0.7*v cc v low-level input voltage v il v cc =1.65v ~ 1.95v 0.35*v 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 0.3*v cc v high-level output voltage v oh i oh =-100 a v cc =1.65 ~ 5.5v v cc -0.1 v i oh =-4ma v cc =1.65v 1.2 1.54 v i oh =-8ma v cc =2.3v 1.9 2.15 v i oh =-16ma v cc =3.0v 2.4 2.50 v i oh =-24ma v cc =3.0v 2.3 2.62 v i oh =-32ma v cc =4.5v 3.8 4.11 v low-level output voltage v ol i ol =100 a v cc =1.65 ~ 5.5v 0.1 v i ol =4ma v cc =1.65v 0.07 0.45 v i ol =8ma v cc =2.3v 0.12 0.30 v i ol =16ma v cc =2.7v 0.17 0.40 v i ol =24ma v cc =3.0v 0.33 0.55 v i ol =32ma v cc =4.5v 0.39 0.55 v input leakage current i i ( leak ) v in =5.5v or gnd, v cc =0 ~ 5.5v 0.1 1 a power off leakage current i off v in or v out =5.5v, v cc =0v 0.1 10 a quiescent supply current i cc v in =5.5v or gnd, i out =0 v cc =1.65 ~ 5.5v 0.1 10 a a dditional quiescent supply current per input pin i cc v cc =2.3 ~ 5.5v, one input at v cc -0.6v, other inputs at v cc or gnd 5 500 a input capacitance c i v cc =3.3v, v in =v cc or gnd 3.5 pf ? switching characteristics (t a =25 ) parameter symbol test conditions min typ max unit propagation delay from input (a or e ) to output(y) t plh /t phl v cc =1.8v0.15v, c l =30 pf r u =1k 3.2 4.0 16.1 ns v cc =2.5v0.2v, c l =30pf r c =500 1.5 2.5 65 ns v cc =3.3v0.3v, c l =50 pf r c =500 1.1 2.5 5.2 ns v cc =5v0.5v, c l =50pf r c =500 0.5 1.8 3.9 ns ? operating characteristics (t a =25 ) parameter symbol test conditions min typ max unit power dissipation capacitance c pd v i = gnd to v cc, v cc =3.3v 16 pf
u74lvc1g19 cmos ic unisonic technologies co., ltd 5 of 5 www.unisonic.com.tw qw-r502-792.a ? test circuit and waveforms from output c l test circuit r l 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. v cc inputs v m c l r l v in t r , t f 1.8v0.15v v cc 2ns v cc /2 30pf 1k ? 2.5v0.2v v cc 2ns v cc /2 30pf 500 ? 3.3v0.3v 2.7v 2.5ns 1.5v 50pf 500 ? 5v0.5v v cc 2.5ns v cc /2 50pf 500 ?
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