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m54hc7240/7241/7244 m74HC7240/7241/7244 october 1993 hc7240: inverted - hc7241/7244 non inverted octal bus buffer with 3 state outputs b1r (plastic package) order codes : m54hcxxxxf1r m74hcxxxxm1r m74hcxxxxb1r m74hcx xxxc1r f1r (ceramic package) m1r (micro package) c1r (chip carrier) pin connection (top view) . high speed t pd = 15 ns (typ.) at v cc =5v . low power dissipation i cc =4 m a (max.) at t a =25 o c . high noise immunity v h = 1.1 v(typ.) at v cc =5v . output drive capability 15 lsttl loads . symmetrical output impedance |i oh |=i ol = 6 ma (min) . balanced propagation delays t plh =t phl . wide operating voltage range v cc (opr) = 2v to 6v . pin and function compatible with 54/74ls240/241/244 description the m54/74HC7240, hc7241 and hc7244 are high speed cmos octal bus buffers fabricated in silicon gate c 2 mos technology. they have the same high speed performance of lsttl combined with true cmos low power consumption. the designer has a choise of select combination of inverting and non-inverting outputs, symmetrical g (active low output control) input, and complementary g and g inputs. each control input governs four bus buffers. the hc7240, hc7241 and hc7244 have the same pin configuration and function as the hc240, hc241 and hc244 and they have a hysteresis characteristics with each input so can be used as a line receiver, etc. all inputs are equipped with protection circuits against static discharge and transient excess voltage. hc7244 hc7241 hc7240 1/12
chip carrier input and output equivalent circuit pin description (hc7240) pin no symbol name and function 1 1g 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 enabel input 10 gnd ground (0v) 20 v cc positive supply voltage pin description (hc7244) pin no symbol name and function 1 1g 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 enabel input 10 gnd ground (0v) 20 v cc positive supply voltage pin description (hc7241) pin no symbol name and function 1 1g 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 enabel input 10 gnd ground (0v) 20 v cc positive supply voltage hc7244 hc7241 hc7240 m54/m74HC7240/7241/7244 2/12
iec logic symbols truth table input output g g (hc7241) an yn (hc7240) yn (hc7241) yn (hc7244) lhlhll lhhlhh hlxzzz x: oho or olo z: high impedance circuit schematic (1/8 package) hc7244 hc7241 hc7240 hc7240 hc7244 m54/m74HC7240/7241/7244 3/12
absolute maximum ratings symbol parameter value unit v cc supply voltage -0.5 to +7 v v i dc input voltage -0.5 to v cc + 0.5 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 source sink current per output pin 35 ma i cc or i gnd dc v cc or ground current 70 ma p d power dissipation 500 (*) mw t stg storage temperature -65 to +150 o c t l lead temperature (10 sec) 300 o c absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition isnotimplied. (*) 500 mw: @ 65 o c derate to 300 mw by 10mw/ o c: 65 o cto85 o c recommended operating conditions symbol parameter value unit v cc supply voltage 2 to 6 v v i input voltage 0 to v cc v v o output voltage 0 to v cc v t op operating temperature: m54hc series m74hc series -55 to +125 -40 to +85 o c o c m54/m74HC7240/7241/7244 4/12
dc specifications symbol parameter test conditions value unit v cc (v) t a =25 o c 54hc and 74hc -40 to 85 o c 74hc -55 to 125 o c 54hc min. typ. max. min. max. min. max. v p high level threshold voltage 2.0 1.0 1.25 1.5 1.0 1.5 1.0 1.5 v 4.5 2.3 2.7 3.15 2.3 3.15 2.3 3.15 6.0 3.0 3.5 4.2 3.0 4.2 3.0 4.2 v n low level threshold voltage 2.0 0.3 0.65 0.9 0.3 0.9 0.3 0.9 v 4.5 1.13 1.6 2.0 1.13 2.0 1.13 2.0 6.0 1.5 2.3 2.6 1.5 2.6 1.5 2.6 v h hysteresis voltage 2.0 0.3 0.6 1.0 0.3 1.0 0.3 1.0 v 4.5 0.6 1.1 1.4 0.6 1.4 0.6 1.4 6.0 0.8 1.2 1.7 0.8 1.7 0.8 1.7 v oh high level output voltage 2.0 v i = v ih or v il i o =-20 m a 1.9 2.0 1.9 1.9 v 4.5 4.4 4.5 4.4 4.4 6.0 5.9 6.0 5.9 5.9 4.5 i o =-6.0 ma 4.18 4.31 4.13 4.10 6.0 i o =-7.8 ma 5.68 5.8 5.63 5.60 v ol low level output voltage 2.0 i o =20 m a 0.0 0.1 0.1 0.1 v 4.5 0.0 0.1 0.1 0.1 6.0 0.0 0.1 0.1 0.1 4.5 i o = 6.0 ma 0.17 0.26 0.33 0.40 6.0 i o = 7.8 ma 0.18 0.26 0.33 0.40 i i input leakage current 6.0 v i =v ih or v il v o =v cc or gnd 0.1 1 1 m a i oz 3 state output off state current 6.0 v i =v cc or gnd 0.5 5 10 m a i cc quiescent supply current 6.0 v i =v cc or gnd 4 40 80 m a m54/m74HC7240/7241/7244 5/12
ac electrical characteristics (c l =50pf,inputt r =t f =6ns) symbol parameter test conditions value unit v cc (v) c l (pf) t a =25 o c 54hc and 74hc -40 to 85 o c 74hc -55 to 125 o c 54hc min. typ. max. min. max. min. max. t tlh t thl output transition time 2.0 50 25 60 75 ns 4.5 7 12 19 6.0 6 10 13 t plh t phl propagation delay time 2.0 50 50 125 155 ns 4.5 15 25 31 6.0 13 21 26 t pzl t pzh output enable time 2.0 50 r l =1k w 68 150 190 ns 4.5 21 30 38 6.0 16 26 32 t plz t phz output disable time 2.0 50 r l =1k w 48 150 190 ns 4.5 21 30 38 6.0 19 26 32 c in input capacitance 5 10 10 10 pf c out output capacitance 10 pf c pd (*) power dissipation capacitance hc7240 hc7241/7244 33 34 pf (*) 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 operting current can be obtained by the following equation. i cc (opr) = c pd ? v cc ? f in +i cc /8 (per channel) test circuit i cc (opr.) m54/m74HC7240/7241/7244 6/12
switching characteristics test circuit hc7240 hc7241/hc7244 m54/m74HC7240/7241/7244 7/12
plastic dip20 (0.25) mechanical data dim. mm inch min. typ. max. min. typ. max. a1 0.254 0.010 b 1.39 1.65 0.055 0.065 b 0.45 0.018 b1 0.25 0.010 d 25.4 1.000 e 8.5 0.335 e 2.54 0.100 e3 22.86 0.900 f 7.1 0.280 i 3.93 0.155 l 3.3 0.130 z 1.34 0.053 p001j m54/m74HC7240/7241/7244 8/12
ceramic dip20 mechanical data dim. mm inch min. typ. max. min. typ. max. a 25 0.984 b 7.8 0.307 d 3.3 0.130 e 0.5 1.78 0.020 0.070 e3 22.86 0.900 f 2.29 2.79 0.090 0.110 g 0.4 0.55 0.016 0.022 i 1.27 1.52 0.050 0.060 l 0.22 0.31 0.009 0.012 m 0.51 1.27 0.020 0.050 n1 4 (min.), 15 (max.) p 7.9 8.13 0.311 0.320 q 5.71 0.225 p057h m54/m74HC7240/7241/7244 9/12
so20 mechanical data dim. mm inch min. typ. max. min. typ. max. a 2.65 0.104 a1 0.10 0.20 0.004 0.007 a2 2.45 0.096 b 0.35 0.49 0.013 0.019 b1 0.23 0.32 0.009 0.012 c 0.50 0.020 c1 45 (typ.) d 12.60 13.00 0.496 0.512 e 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 11.43 0.450 f 7.40 7.60 0.291 0.299 l 0.50 1.27 0.19 0.050 m 0.75 0.029 s8 (max.) p013l m54/m74HC7240/7241/7244 10/12
plcc20 mechanical data dim. mm inch min. typ. max. min. typ. max. a 9.78 10.03 0.385 0.395 b 8.89 9.04 0.350 0.356 d 4.2 4.57 0.165 0.180 d1 2.54 0.100 d2 0.56 0.022 e 7.37 8.38 0.290 0.330 e 1.27 0.050 e3 5.08 0.200 f 0.38 0.015 g 0.101 0.004 m 1.27 0.050 m1 1.14 0.045 p027a m54/m74HC7240/7241/7244 11/12
information furnished is believed to be accurate and reliable. however, sgs-thomson microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. no license is granted by implication or otherwise under any patent or patent rights of sgs-thomson microelectronics. specifications mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. sgs-thomson microelectronics products are not authorized for use ascritical components in life support devices or systems without express written approval of sgs-thomson microelectonics. ? 1994 sgs-thomson microelectronics - all rights reserved sgs-thomson microelectronics group of companies australia - brazil - france - germany - hong kong - italy - japan - korea - malaysia - malta - morocco - the netherlands - singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a m54/m74HC7240/7241/7244 12/12

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