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1/12 august 2004 high speed: t pd =4.7ns (typ.) at v cc = 3.3v 5v tolerant inputs power-down protection on inputs input voltage level: v il = 0.8v, v ih = 2v at v cc =3v low power dissipation: i cc = 4 a (max.) at t a =25c low noise: v olp = 0.3v (typ.) at v cc =3.3v symmetrical output impedance: |i oh | = i ol = 4 ma (min) at v cc =3v balanced propagation delays: t plh ? t phl operating voltage range: v cc (opr) = 2v to 3.6v (1.2v data retention) pin and function compatible with 74 series 240 improved latch-up immunity description the 74lvx240 is a low voltage cmos octal bus buffer (3-state) fabricated with sub-micron silicon gate and double-layer metal wiring c 2 mos technology. it is ideal for low power, battery operated and low noise 3.3v applications. g output enable governs four bus buffers power down protection is provided on all inputs and 0 to 7v can be accepted on inputs with no regard to the supply voltage. this device can be used to interface 5v to 3v. it combines high speed performance with the true cmos low power consumption. all inputs and outputs are equipped with protection circuits against static discharge, giving them 2kv esd immunity and transient excess voltage. 74lvx240 low voltage cmos octal bus buffer (3-state inv.) with 5v tolerant inputs figure 1: pin connection and iec logic symbols table 1: order codes package t & r sop 74lvx240mtr tssop 74LVX240TTR tssop sop rev. 3 obsolete product(s) - obsolete product(s)
74lvx240 2/12 figure 2: input equivalent circuit table 2: pin description table 3: truth table x :don?t care z : high impedance table 4: absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditi ons is not implied table 5: recommended operating conditions 1) truth table guaranteed: 1.2v to 3.6v 2) v in from 0.8v to 2.0v pin n symbol name and function 11g output enable input 2, 4, 6, 8 1a1 to 1a4 data inputs 9, 7, 5, 3 2y1 to 2y4 data outputs 11, 13, 15, 17 2a1 to 2a4 data inputs 18, 16, 14, 12 1y1 to 1y4 data outputs 19 2g output enable input 10 gnd ground (0v) 20 v cc positive supply voltage inputs output g an yn llh lhl hxz symbol parameter value unit v cc supply voltage -0.5 to +7.0 v v i dc input voltage -0.5 to +7.0 v v o dc output voltage -0.5 to v cc + 0.5 v i ik dc input diode current - 20 ma i ok dc output diode current 20 ma i o dc output current 25 ma i cc or i gnd dc v cc or ground current 50 ma t stg storage temperature -65 to +150 c t l lead temperature (10 sec) 300 c symbol parameter value unit v cc supply voltage (note 1) 2 to 3.6 v v i input voltage 0 to 5.5 v v o output voltage 0 to v cc v t op operating temperature -55 to 125 c dt/dv input rise and fall time (note 2) (v cc = 3v) 0 to 100 ns/v obsolete product(s) - obsolete product(s)
74lvx240 3/12 table 6: dc specifications table 7: dynamic switching characteristics 1) worst case package. 2) max number of outputs defined as (n). data inputs are driven 0v to 3.3v, (n-1) outputs switching and one output at gnd. 3) max number of data inputs (n) switching. (n-1) switching 0v to 3.3v. inputs under test switching: 3.3v to threshold (v ild ), 0v to threshold (v ihd ), f=1mhz. symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. v ih high level input voltage 2.0 1.5 1.5 1.5 v 3.0 2.0 2.0 2.0 3.6 2.4 2.4 2.4 v il low level input voltage 2.0 0.5 0.5 0.5 v 3.0 0.8 0.8 0.8 3.6 0.8 0.8 0.8 v oh high level output voltage 2.0 i o =-50 a 1.9 2.0 1.9 1.9 v 3.0 i o =-50 a 2.9 3.0 2.9 2.9 3.0 i o =-4 ma 2.58 2.48 2.44 v ol low level output voltage 2.0 i o =50 a 0.0 0.1 0.1 0.1 v 3.0 i o =50 a 0.0 0.1 0.1 0.1 3.0 i o =4 ma 0.36 0.44 0.55 i oz high impedance output leakage current 3.6 v i = v ih or v il v o = v cc or gnd 0.25 2.5 2.5 a i i input leakage current 3.6 v i = 5.5v or gnd 0.1 1 1 a i cc quiescent supply current 3.6 v i = v cc or gnd 44040 a symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. v olp dynamic low voltage quiet output (note 1, 2) 3.3 c l = 50 pf 0.3 0.5 v v olv -0.5 -0.3 v ihd dynamic high voltage input (note 1, 3) 3.3 2.0 v ild dynamic low voltage input (note 1, 3) 3.3 0.8 obsolete product(s) - obsolete product(s)
74lvx240 4/12 table 8: ac electrical characteristics (input t r = t f = 3ns) 1) skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switch- ing in the same direction, either high or low 2) parameter guaranteed by design (*) voltage range is 3.3v 0.3v table 9: capacitive characteristics 1) c pd is defined as the value of the ic?s internal equivalent capacitance which is calculated from the operating current consumption without load. (refer to test circuit). average operating current can be obtained by the following equation. i cc(opr) = c pd x v cc x f in + i cc /8 (per circuit) symbol parameter test condition value unit v cc (v) c l (pf) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. t plh t phl propagation delay time 2.7 15 5.7 10.1 1.0 12.5 1.0 14.0 ns 2.7 50 8.2 13.6 1.0 16.0 1.0 17.0 3.3 (*) 15 4.7 6.2 1.0 7.5 1.0 8.5 3.3 (*) 50 6.8 9.7 1.0 11.0 1.0 12.0 t pzl t pzh output enable time 2.7 15 7.1 13.8 1.0 16.5 1.0 18.0 ns 2.7 50 9.6 17.3 1.0 20.0 1.0 21.5 3.3 (*) 15 5.5 8.8 1.0 10.5 1.0 12.0 3.3 (*) 50 8.0 12.3 1.0 14.0 1.0 15.0 t plz t phz output disable time 2.7 50 11.6 16.0 1.0 19.0 1.0 20.0 ns 3.3 (*) 50 9.7 11.4 1.0 13.0 1.0 14.0 t oslh t oshl output to output skew time (note 1,2) 2.7 50 0.5 1.0 1.5 1.5 ns 3.3 (*) 50 0.5 1.0 1.5 1.5 symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c -55 to 125c min. typ. max. min. max. min. max. c in input capacitance 3.3 4 10 10 10 pf c out output capacitance 3.3 6 pf c pd power dissipation capacitance (note 1) 3.3 f in = 10mhz 17 pf obsolete product(s) - obsolete product(s)
74lvx240 5/12 figure 3: test circuit c l =15/50pf or equivalent (includes jig and probe capacitance) r l = r1 = 1k ? or equivalent r t = z out of pulse generator (typically 50 ? ) figure 4: waveform - propagation delays (f=1mhz; 50% duty cycle) test switch t plh , t phl open t pzl , t plz v cc t pzh , t phz gnd obsolete product(s) - obsolete product(s)
74lvx240 6/12 figure 5: waveform - output enable and disable time (f=1mhz; 50% duty cycle) obsolete product(s) - obsolete product(s)
74lvx240 7/12 dim. mm. inch min. typ max. min. typ. max. a 2.35 2.65 0.093 0.104 a1 0.1 0.30 0.004 0.012 b 0.33 0.51 0.013 0.020 c 0.23 0.32 0.009 0.013 d 12.60 13.00 0.496 0.512 e 7.4 7.6 0.291 0.299 e 1.27 0.050 h 10.00 10.65 0.394 0.419 h 0.25 0.75 0.010 0.030 l 0.4 1.27 0.016 0.050 k0 8 0 8 ddd 0.100 0.004 so-20 mechanical data 0016022d obsolete product(s) - obsolete product(s)
74lvx240 8/12 dim. mm. inch min. typ max. min. typ. max. a 1.2 0.047 a1 0.05 0.15 0.002 0.004 0.006 a2 0.8 1 1.05 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0079 d 6.4 6.5 6.6 0.252 0.256 0.260 e 6.2 6.4 6.6 0.244 0.252 0.260 e1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 bsc 0.0256 bsc k0? 8?0? 8? l 0.45 0.60 0.75 0.018 0.024 0.030 tssop20 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 0087225c obsolete product(s) - obsolete product(s)
74lvx240 9/12 dim. mm. inch min. typ max. min. typ. max. a 330 12.992 c 12.8 13.2 0.504 0.519 d 20.2 0.795 n 60 2.362 t 30.4 1.197 ao 10.8 11 0.425 0.433 bo 13.2 13.4 0.520 0.528 ko 3.1 3.3 0.122 0.130 po 3.9 4.1 0.153 0.161 p 11.9 12.1 0.468 0.476 tape & reel so-20 mechanical data obsolete product(s) - obsolete product(s)
74lvx240 10/12 dim. mm. inch min. typ max. min. typ. max. a 330 12.992 c 12.8 13.2 0.504 0.519 d 20.2 0.795 n 60 2.362 t 22.4 0.882 ao 6.8 7 0.268 0.276 bo 6.9 7.1 0.272 0.280 ko 1.7 1.9 0.067 0.075 po 3.9 4.1 0.153 0.161 p 11.9 12.1 0.468 0.476 tape & reel tssop20 mechanical data obsolete product(s) - obsolete product(s)
74lvx240 11/12 table 10: revision history date revision description of changes 27-aug-2004 3 ordering codes revision - pag. 1. obsolete product(s) - obsolete product(s)
74lvx240 12/12 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the co nsequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications mentioned in this publicati on are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics prod ucts are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectro nics. the st logo is a registered trademark of stmicroelectronics all other names are the property of their respective owners ? 2004 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com obsolete product(s) - obsolete product(s)

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