unisonic technologies co., ltd U74AHC125 cmos ic www.unisonic.com.tw 1 of 6 copyright ? 2011 unisonic technologies co., ltd qw-r502-650.a quadruple bus buffer gate with 3-state outputs ? description the U74AHC125 is a quadruple bus buffer gate with 3-state output. when oe is high, the y output is in a high-impedance state. when oe is low, the device passes non inverted 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 v cc through a pull-up 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 3.8ns from a to y at 5v, c l =15pf * low quiescent current: i cc = 4 a (max.) at 5.5v * 8 ma output driver at 5v sop-14 ? ordering information ordering number lead free halogen free package packing U74AHC125l-s14-r U74AHC125g-s14-r sop-14 tape reel U74AHC125l-s14-t U74AHC125g-s14-t sop-14 tube
U74AHC125 cmos ic unisonic technologies co., ltd 2 of 6 www.unisonic.com.tw qw-r502-650.a ? pin configuration ? function table inputs outputs oe a y l l h h l x h l z ? logic diagram a oe y
U74AHC125 cmos ic unisonic technologies co., ltd 3 of 6 www.unisonic.com.tw qw-r502-650.a ? absolute maximum rating (unless otherwise specified) parameter symbol ratings unit supply voltage v cc -0.5~7 v input voltage v in -0.5~7 v output voltage 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 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. ? recommended operating comditions parameter symbol test conditions min typ max unit supply voltage v cc 2 5.5 v v cc = 2v 1.5 v cc = 3v 2.1 high-level input voltage v ih v cc = 5.5v 3.85 v v cc = 2v 0.5 v cc = 3v 0.9 low-level input voltage v il v cc = 5.5v 1.65 v input voltage v in 0 5.5 v output voltage v out 0 v cc v v cc = 2v -50 a v cc = 3.30.3v -4 high-level output current i oh v cc = 50.5v -8 ma v cc = 2v 50 a v cc = 3.30.3v 4 low-level output current i ol v cc = 50.5v 8 ma v cc = 3.30.3v 100 input transition rise or fall rate t/ v v cc = 50.5v 20 ns/v operating temperature t a -40 85 c
U74AHC125 cmos ic unisonic technologies co., ltd 4 of 6 www.unisonic.com.tw qw-r502-650.a ? electrical characteristics ( t a =25 c , unless otherwise specified) parameter symbol test conditions min typ max unit i oh = -50 a, v cc = 2v 1.9 2 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 high-level output voltage v oh i oh = -8 ma, v cc = 4.5v 3.94 v i oh = 50 a, v cc = 2v 0.1 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 low-level output voltage v ol i oh = 8 ma, v cc = 4.5v 0.36 v 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 out = 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 4 a input capacitance c in v in = v cc or gnd, v cc =5v 4 10 pf ? switching characteristics (v cc = 3.3v 0.3v, t a =25c) parameter symbol test conditions min typ max unit c l =15pf, r l =1k ? 5.6 8 t plh c l =50pf, r l =1k ? 8.1 11.5 ns c l =15pf, r l =1k ? 5.6 8 propagation delay from input a to output y, t pd t phl c l =50pf, r l =1k ? 8.1 11.5 ns c l =15pf, r l =1k ? 5.4 8 t pzh c l =50pf, r l =1k ? 7.9 11.5 ns c l =15pf, r l =1k ? 5.4 8 propagation delay from input oe to output y, t en t pzl c l =50pf, r l =1k ? 7.9 11.5 ns c l =15pf, r l =1k ? 7 9.7 t phz c l =50pf, r l =1k ? 9.5 13.2 ns c l =15pf, r l =1k ? 7 9.7 propagation delay from input oe to output y, t dis t plz c l =50pf, r l =1k ? 9.5 13.2 ns (v cc = 5v 0.5v, t a =25c) parameter symbol test conditions min typ max unit c l =15pf, r l =1k ? 3.8 5.5 t plh c l =50pf, r l =1k ? 5.3 7.5 ns c l =15pf, r l =1k ? 3.8 5.5 propagation delay from input a to output y, t pd t phl c l =50pf, r l =1k ? 5.3 7.5 ns c l =15pf, r l =1k ? 3.6 5.1 t pzh c l =50pf, r l =1k ? 5.1 7.1 ns c l =15pf, r l =1k ? 3.6 5.1 propagation delay from input oe to output y, t en t pzl c l =50pf, r l =1k ? 5.1 7.1 ns c l =15pf, r l =1k ? 4.6 6.8 t phz c l =50pf, r l =1k ? 6.1 8.8 ns c l =15pf, r l =1k ? 4.6 6.8 propagation delay from input oe to output y, t dis t plz c l =50pf, r l =1k ? 6.1 8.8 ns ? operating characteristics (t a =25c) parameter symbol test conditions ratings unit power dissipation capacitance c pd v cc = 5v, f=1mhz, no load 14 pf
U74AHC125 cmos ic unisonic technologies co., ltd 5 of 6 www.unisonic.com.tw qw-r502-650.a ? test circuit and waveforms test s1 t plh /t phl open t plz /t pzl v load t phz /t pzh gnd input v cc v in t r , t f v m v load c l r l v 15pf 3.3v0.3v v cc 3ns v cc /2 v cc 50pf 1k ? 0.3v 15pf 5v0.5v v cc 3ns v cc /2 v cc 50pf 1k ? 0.5v v m v in 0 v pulse duration t w input v m v in 0v setup and hold times t su v m timing input data input t h v m v m
U74AHC125 cmos ic unisonic technologies co., ltd 6 of 6 www.unisonic.com.tw qw-r502-650.a v m v in 0v v oh v ol voltage waveforms propagation delay times input output t plh t phl t plh t phl output v m v m v m v m v m v oh v ol notes: 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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