? 2003 fairchild semiconductor corporation ds011552 www.fairchildsemi.com february 1993 revised september 2003 74lvx244 low voltage octal buffer/line driver with 3-state outputs 74lvx244 low voltage octal buffer/line driver with 3-state outputs general description the lvx244 is an octal non-inverting buffer and line driver designed to be employed as a memory address driver, clock driver and bus oriented transmitter or receiver which provides improved pc board density. the inputs tolerate up to 7v allowing interface of 5v systems to 3v systems. features input voltage translation from 5v to 3v ideal for low power/low noise 3.3v applications guaranteed simultaneous switching noise level and dynamic threshold performance ordering code: devices also available in tape and reel. specify by appending suffix letter ?x? to the ordering code. logic symbol ieee/iec connection diagram pin descriptions truth tables h = high voltage level l = low voltage level x = immaterial z = high impedance order number package number package description 74lvx244m m20b 20-lead small outline integrated circuit (soic), jedec ms-013, 0.300" wide 74lvx244sj m20d 20-lead small outline package (sop), eiaj type ii, 5.3mm wide 74lvx244mtc mtc20 20-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide pin names description oe 1 , oe 2 3-state output enable inputs i 0 ? i 7 inputs o 0 ? o 7 outputs inputs outputs oe 1 i n (pins 12, 14, 16, 18) ll l lh h hx z inputs outputs oe 2 i n (pins 3, 5, 7, 9) ll l lh h hx z
www.fairchildsemi.com 2 74lvx244 absolute maximum ratings (note 1) recommended operating conditions (note 2) note 1: the ? absolute maximum ratings ? are those values beyond which the safety of the device cannot be guaranteed. the device should not be operated at these limits. the parametric values defined in the electrical characteristics tables are not guaranteed at the absolute maximum ratings. the ? recommended operating conditions ? table will define the conditions for actual device operation. note 2: unused inputs must be held high or low. they may not float. dc electrical characteristics noise characteristics (note 3) note 3: input t r = t f = 3 ns supply voltage (v cc ) ? 0.5v to + 7.0v dc input diode current (i ik ) v i = ? 0.5v ? 20 ma dc input voltage (v i ) ? 0.5v to 7v dc output diode current (i ok ) v o = ? 0.5v ? 20 ma v o = v cc + 0.5v + 20 ma dc output voltage (v o ) ? 0.5v to v cc + 0.5v dc output source or sink current (i o ) 25 ma dc v cc or ground current (i cc or i gnd ) 75 ma storage temperature (t stg ) ? 65 c to + 150 c power dissipation 180 mw supply voltage (v cc ) 2.0v to 3.6v input voltage (v i )0v to 5.5v output voltage (v o ) 0v to v cc operating temperature (t a ) ? 40 c to + 85 c input rise and fall time ( ? t/ ? v) 0 ns/v to 100 ns/v symbol parameter v cc t a = + 25 ct a = ? 40 c to + 85 c units conditions min typ max min max v ih high level input 2.0 1.5 1.5 voltage 3.0 2.0 2.0 v 3.6 2.4 2.4 v il low level input 2.0 0.5 0.5 voltage 3.0 0.8 0.8 v 3.6 0.8 0.8 v oh high level output 2.0 1.9 2.0 1.9 v in = v ih or v il i oh = ? 50 a voltage 3.0 2.9 3.0 2.9 v i oh = ? 50 a 3.0 2.58 2.48 i oh = ? 4 ma v ol low level output 2.0 0.0 0.1 0.1 v in = v ih or v il i ol = 50 a voltage 3.0 0.0 0.1 0.1 v i ol = 50 a 3.0 0.36 0.44 i ol = 4 ma i oz 3-state output 3.6 0.25 2.5 av in = v ih or v il off-state current v out = v cc or gnd i in input leakage current 3.6 0.1 1.0 av in = 5.5v or gnd i cc quiescent supply current 3.6 4.0 40.0 av in = v cc or gnd symbol parameter v cc t a = 25 c units c l (pf) (v) typ limit v olp quiet output maximum dynamic v ol 3.3 0.5 0.8 v 50 v olv quiet output minimum dynamic v ol 3.3 ? 0.5 ? 0.8 v 50 v ihd minimum high level dynamic input voltage 3.3 2.0 v 50 v ild maximum low level dynamic input voltage 3.3 0.8 v 50
3 www.fairchildsemi.com 74lvx244 ac electrical characteristics note 4: parameter guaranteed by design. t oslh = |t plhm ? t plhn |, t oshl = |t phlm ? t phln | capacitance note 5: c pd is defined as the value of the internal equivalent capacitance which is calculated from the operating current consumption with out load. symbol parameter v cc t a = + 25 ct a = ? 40 c to + 85 c units conditions (v) min typ max min max t plh propagation delay 2.7 6.1 11.4 1.0 13.5 ns c l = 15 pf t phl time 8.614.91.017.0 c l = 50 pf 3.3 0.3 4.7 7.1 1.0 8.5 c l = 15 pf 7.210.61.012.0 c l = 50 pf t pzl 3-state output 2.7 7.1 13.8 1.0 16.5 ns c l = 15 pf, t pzh enable time r l = 1 k ? 9.617.31.020.0 c l = 50 pf, r l = 1 k ? 3.3 0.3 5.5 8.8 1.0 10.5 c l = 15 pf, r l = 1 k ? 8.012.31.014.0 c l = 50 pf, r l = 1 k ? t plz 3-state output 2.7 11.6 16.0 1.0 19.0 ns c l = 50 pf, t phz disable time 3.3 0.3 9.7 11.4 1.0 13.0 r l = 1 k ? t oslh output to output 2.7 1.5 1.5 ns c l = 50 pf t oshl skew (note 4) 3.3 1.5 1.5 symbol parameter t a = + 25 ct a =? 40 c to + 85 c units min typ max min max c in input capacitance 4 10 10 pf c out output capacitance 6 pf c pd power dissipation capacitance (note 5) 19 pf
www.fairchildsemi.com 4 74lvx244 physical dimensions inches (millimeters) unless otherwise noted 20-lead small outline integrated circuit (soic), jedec ms-013, 0.300" wide package number m20b
5 www.fairchildsemi.com 74lvx244 physical dimensions inches (millimeters) unless otherwise noted (continued) 20-lead small outline package (sop), eiaj type ii, 5.3mm wide package number m20d
www.fairchildsemi.com 6 74lvx244 low voltage octal buffer/line driver with 3-state outputs physical dimensions inches (millimeters) unless otherwise noted (continued) 20-lead thin shrink small outline package (tssop), jedec mo-153, 4.4mm wide package number mtc20 fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and fairchild reserves the right at any time without notice to change said circuitry and specifications. life support policy fairchild ? s products are not authorized for use as critical components in life support devices or systems without the express written approval of the president of fairchild semiconductor corporation. as used herein: 1. life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be rea- sonably expected to result in a significant injury to the user. 2. a critical component in any component of a life support device or system whose failure to perform can be rea- sonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com
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