unisonic technologies co., ltd u74ahc1g126 preliminary cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2012 unisonic technologies co., ltd qw-r502-782.a single bus buffer gate with 3-state output ? description the u74ahc1g126 is a single bus buffer gate/line driver with 3-state output. when oe is lo w, the y output are in a high-impedance state. when oe is high, the device passes noninverted data from the a input to the y output. to ensure the high-impedance st ate during power up or power down, oe should be tied to gnd through a pull-down resistor; the minimum value of the resistor is determined by the current-sinking capability of the driver. ? features * wide supply voltage range from 2v to 5.5v * max t pd of 6 ns from a to y at 5v * low power consumption, i cc = 1 a (max.) at 5.5v * 8 ma output driver at 5v ? ordering information order number package packing normal lead free plating u74ahc1g126l-al5-r U74AHC1G126G-AL5-R sot-353 tape reel
u74ahc1g126 preliminary cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-782.a ? pin configuration ? function table input output oe a y h h l h l x h l z ? logic diagram (positive logic)
u74ahc1g126 preliminary cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-782.a ? absolute maximum rating parameter symbol ratings unit supply voltage range v cc -0.5~7 v input voltage range v in -0.5~7 v output voltage range v out -0.5~v cc +0.5 v input clamp current (v in <0) i ik -20 ma output clamp current (v out <0, or v out >v cc ) i ok 20 ma output current i out 25 ma v cc or gnd current i cc 50 ma package thermal impedance ja 250 c /w storage temperature t stg -65 ~ +150 c note: 1. the input and output voltage ratings may be exce eded if the input and output cu rrent 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. ? recommended operating comditions parameter symbol conditions min max unit supply voltage v cc 2 5.5 v high-level input voltage v ih v cc = 2v 1.5 v v cc = 3v 2.1 v cc = 5.5v 3.85 lo w -level input voltage v il v cc = 2v 0.5 v v cc = 3v 0.9 v cc = 5.5v 1.65 input voltage v in 0 5.5 v output voltage v out 0 v cc v high-level output current i oh v cc = 2v -50 a v cc = 3.30.3v -4 ma v cc = 50.5v -8 lo w -level output current i ol v cc = 2v 50 a v cc = 3.30.3v 4 ma v cc = 50.5v 8 input transition rise or fall rate t/ v v cc = 3.30.3v 100 ns/v v cc = 50.5v 20 operating temperature t a -40 85 c
u74ahc1g126 preliminary cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-782.a ? electrical characteristics (t a =25c , unless otherwise specified) parameter symbol test conditions min typ max unit high-level output voltage v oh i oh = -50 a, v cc = 2v 1.9 2 v i oh = -50 a, v cc = 3v 2.9 3 i oh = -50 a, v cc = 4.5v 4.4 4.5 i oh = -4 ma, v cc = 3v 2.58 i oh = -8 ma, v cc = 4.5v 3.94 low-level output voltage v ol i oh = 50 a, v cc = 2v 0.1 v i oh = 50 a, v cc = 3v 0.1 i oh = 50 a, v cc = 4.5v 0.1 i oh = 4 ma, v cc = 3v 0.36 i oh = 8 ma, v cc = 4.5v 0.36 input leakage current (a or oe input) i i(leak) v in = 5.5v or gnd, v cc = 0 to 5.5v 0.1 a high-impedance state current i oz v in = v cc or gnd, v cc = 5.5v 0.25 a quiescent supply current i cc v in = v cc or gnd, i out = 0, v cc = 5.5v 1 a input capacitance c in v in = v cc or gnd, v cc =5v 4 10 pf output capacitance c out v o = v cc or gnd, v cc =5v 10 pf ? switching characteristics (v cc = 3.3v 0.3v, t a =25c) parameter symbol test conditions min typ max unit propagation delay from input a to output y, t pd t plh c l =15pf, r l =1k ? 5.6 8 ns c l =50pf, r l =1k ? 8.1 11.5 t phl c l =15pf, r l =1k ? 5.6 8 ns c l =50pf, r l =1k ? 8.1 11.5 propagation delay from input oe to output y, t en t pzh c l =15pf, r l =1k ? 5.4 8 ns c l =50pf, r l =1k ? 7.9 11.5 t pzl c l =15pf, r l =1k ? 5.4 8 ns c l =50pf, r l =1k ? 7.9 11.5 propagation delay from input oe to output y, t dis t phz c l =15pf, r l =1k ? 7 9.7 ns c l =50pf, r l =1k ? 9.5 13.2 t plz c l =15pf, r l =1k ? 7 9.7 ns c l =50pf, r l =1k ? 9.5 13.2 ? switching characteristics (v cc = 5v 0.5v, t a =25c) parameter symbol test conditions min typ max unit propagation delay from input a to output y, t pd t plh c l =15pf, r l =1k ? 3.8 5.5 ns c l =50pf, r l =1k ? 5.3 7.5 t phl c l =15pf, r l =1k ? 3.8 5.5 ns c l =50pf, r l =1k ? 5.3 7.5 propagation delay from input oe to output y, t en t pzh c l =15pf, r l =1k ? 3.6 5.1 ns c l =50pf, r l =1k ? 5.1 7.1 t pzl c l =15pf, r l =1k ? 3.6 5.1 ns c l =50pf, r l =1k ? 5.1 7.1 propagation delay from input oe to output y, t dis t phz c l =15pf, r l =1k ? 4.6 6.8 ns c l =50pf, r l =1k ? 6.1 8.8 t plz c l =15pf, r l =1k ? 4.6 6.8 ns c l =50pf, r l =1k ? 6.1 8.8 ? operating characteristics (t a =25c , unless otherwise specified) parameter symbol test conditions typ unit power dissipation capacitance c p d v cc = 5v, f=1mhz, no load 14 pf
u74ahc1g126 preliminary cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-782.a ? test circuit and waveforms test s1 t plh /t phl open t plz /t pzl v load t phz /t pzh gnd v cc input v m v load c l r l v v in t r , t f 3.3v0.3v v cc 3ns v cc /2 v cc 15pf 1k ? 0.3v 50pf 5v0.5v v cc 3ns v cc /2 v cc 15pf 1k ? 0.5v 50pf 0 v input output t plh output v m t plh t phl t phl v m v m v m v m v in v oh v oh v ol v ol
u74ahc1g126 preliminary cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-782.a v in 0 v input output t pzh v load output v m v oh ~ v v ol ~ v s 1 at v load s 1 at gnd t phz t plz t pzl v m v m v m v ol 0 v v oh note: 1.c l includes probe and jig capacitance. 2. all input pulses are supplied by generator s having the following characteristics: prr 1mhz, z o = 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.
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