unisonic technologies co., ltd U74LVC157 cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2013 unisonic technologies co., ltd qw-r502-990. a quadruple 2-line to 1-line data selectors/multiplexers ? description the U74LVC157 is designed for 1.65v to 3.6v v cc operation. the device features a common strobe ( g ) input. when ( g) is high, all outputs are low. when g is low, a 4-bit word is selected from one of two sources and is routed to the f our outputs. ? features * operate from 1.65v to 3.6v * inputs accept voltages to 5.5v * max t pd of 5.2ns at 3.3v * typical v olp (output ground bounce)<0.8v at v cc =3.3v, t a =25c * typical v ohv (output v oh undershoot)>2v at v cc =3.3v, t a =25c sop-16 ? ordering information ordering number package packing lead free halogen free U74LVC157l-s16-t U74LVC157g-s16-t sop-16 tube U74LVC157l-s16-r U74LVC157g-s16-r sop-16 tape reel U74LVC157l-s16-t (1) packing type (2) package type (3) halogen free (1) t: tube, r: tape reel (2) s16: sop-16 (3) l: lead free, g: halogen free
U74LVC157 cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-990. a ? pin configuration ? function table inputs output y g b / a a b h x x x l l l l x l l l h x h l h x l l l h x h h note: h: high voltage level; l: low voltage level; x: don?t care.
U74LVC157 cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-990. a ? logic diagram (positive logic)
U74LVC157 cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-990. 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 v out -0.5 ~ v cc +0.5 v v cc or gnd current i cc 100 ma continuous output current 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 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 (t a =25c , unless otherwise specified) parameter symbol test conditions min typ max unit supply voltage v cc operating 1.65 3.6 v input voltage v in 0 5.5 v output voltage v out 0 v cc v high-level input voltage v ih v cc =1.65v~1.95v 0.65v cc v v cc =2.3v~2.7v 1.7 v cc =2.7v~3.6v 2 low-level input voltage v il v cc =1.65v~1.95v 0.35v cc v v cc =2.3v~2.7v 0.7 v cc =2.7v~3.6v 0.8 input transition rise or fall rate ? t/ ? v 10 ns/v operating temperature t a -40 85 c 3note: all unused inputs of t he device must be held at v cc or gnd to ensure proper device operation. ? electrical characteristics (t a =25c , unless otherwise specified) parameter symbol test conditions min typ max unit high-level output voltage v oh v cc =1.65~3.6v, i oh =-100 a v cc -0.2 v v cc =1.65v, i oh =-4ma 1.29 v cc =2.3v, i oh =-8ma 1.9 v cc =2.7v, i oh =-12ma 2.2 v cc =3.0v, i oh =-12ma 2.4 v cc =3v, i oh =-24ma 2.3 low-level output voltage v ol v cc =1.6 ~3.6v, i ol =100 a 0.1 v v cc =1.65v, i ol =4ma 0.24 v cc =2.3v, i ol =8ma 0.30 v cc =2.7v, i ol =12ma 0.40 v cc =3v, i ol =24ma 0.55 input leakage current i i(leak) v cc =3.6v, v in =5.5v or gnd 1 a quiescent supply current i cc v in =v cc or gnd, i out =0 v cc =3.6v 1 a additional quiescent supply current per input pin ? i cc v cc =2.7v~3.6v, one input at v cc -0.6v, other inputs at v cc or gnd 500 a input capacitance c i v cc =3.3v, v in =v cc or gnd 5 pf
U74LVC157 cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-990. a ? switching characteristics (t a =25c , unless otherwise specified)(see figure 1) parameter symbol test conditions min typ max unit propagation delay from input (a or b) to output(y) t plh /t phl v cc =1.8v0.15v, c l =30pf 1 5.5 13.5 ns v cc =2.5v0.2v, c l =30pf 1 3.2 7.4 v cc =2.7v, c l =50pf 1 3.6 5.7 v cc =3.3v0.3v, c l =50pf 1 3 5 propagation delay from input ( b / a ) to output(y) t plh /t phl v cc =1.8v0.15v, c l =30pf 1 6 15.5 ns v cc =2.5v0.2v, c l =30pf 1 3.7 9.6 v cc =2.7v, c l =50pf 1 4.1 7.9 v cc =3.3v0.3v, c l =50pf 1 3.4 6.6 propagation delay from input ( g ) to output(y) t plh /t phl v cc =1.8v0.15v, c l =30pf 1 5.9 13.5 ns v cc =2.5v0.2v, c l =30pf 1 3.5 9.3 v cc =2.7v, c l =50pf 1 3.9 7.6 v cc =3.3v0.3v, c l =50pf 1 3.3 6.3 ? operating characteristics (t a =25c , unless otherwise specified) parameter symbol test conditions min typ max unit power dissipation capacitance c pd f=10mhz v cc =1.8v 14 pf v cc =2.5v 15 v cc =3.3v 16
U74LVC157 cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-990. a ? test circuit and waveforms v cc inputs v m c l r l v i 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 ? 2.7v 2.7v 2.5ns 1.5v 50pf 500 ? 3.3v0.3v 2.7v 2.5ns 1.5v 50pf 500 ? note: 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 ? . figure 1. test circuit and voltage waveforms 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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