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74lv244 octal buffer/line driver (3-state) product specification supersedes data of 1997 feb 19 ic24 data handbook 1998 may 20 integrated circuits
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 2 1998 may 20 8531924 19420 features ? wide operating voltage: 1.0 to 5.5 v ? optimized for low voltage applications: 1.0 to 3.6 v ? accepts ttl input levels between v cc = 2.7 v and v cc = 3.6 v ? typical v olp (output ground bounce) < 0.8 v at v cc = 3.3 v, t amb = 25 c ? typical v ohv (output v oh undershoot) > 2 v at v cc = 3.3 v, t amb = 25 c ? output capability: bus driver ? i cc category: msi description the 74lv244 is a low-voltage si-gate cmos device and is pin and function compatible with 74hc/hct244. the 74lv244 is an octal non-inverting buffer/line driver with 3-state outputs. the 3-state outputs are controlled by the output enable inputs 1oe and 2oe . a high on noe causes the outputs to assume a high impedance off-state. the 74lv244 is identical to the 74lv240 but has non-inverting outputs. quick reference data gnd = 0 v; t amb = 25 c; t r = t f 2.5 ns symbol parameter conditions typical unit t phl /t plh propagation delay 1a n to 1y n ; 2a n to 2y n c l = 15 pf; v cc = 3.3 v 8.0 ns c i input capacitance 3.5 pf c pd power dissipation capacitance per buffer v cc = 3.3 v v i = gnd to v cc 1 35 pf note: 1. c pd is used to determine the dynamic power dissipation (p d in m w) p d = c pd v cc 2 f i (c l v cc 2 f o ) where: f i = input frequency in mhz; c l = output load capacitance in pf; f o = output frequency in mhz; v cc = supply voltage in v; (c l v cc 2 f o ) = sum of the outputs. ordering information packages temperature range outside north america north america pkg. dwg. # 20-pin plastic dil 40 c to +125 c 74lv244 n 74lv244 n sot146-1 20-pin plastic so 40 c to +125 c 74lv244 d 74lv244 d sot163-1 20-pin plastic ssop type ii 40 c to +125 c 74lv244 db 74lv244 db sot339-1 20-pin plastic tssop type i 40 c to +125 c 74lv244 pw 74lv244pw dh sot360-1 pin configuration sv00620 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 1oe 1a 0 2y 0 1a 1 2y 1 1a 2 2y 2 1a 3 2y 3 gnd 2a 3 1y 3 2a 2 1y 2 2a 1 1y 1 2a 0 1y 0 2oe v cc logic symbol sv00621 1y 0 2y 0 18 3 1y 1 2y 1 16 5 1y 2 2y 2 14 7 1y 3 2y 3 12 9 1a 0 2a 0 2 17 1a 1 2a 1 4 15 1a 2 2a 2 6 13 1a 3 2a 3 8 11 1oe 1 2oe 19
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 1998 may 20 3 pin description pin number symbol function 1 1oe output enable input (active low) 2, 4, 6, 8 1a 0 to 1a 3 data inputs 3, 5, 7, 9 2y 0 to 2y 3 bus outputs 10 gnd ground (0 v) 17, 15, 13, 11 2a 0 to 2a 3 data inputs 18, 16, 14, 12 1y 0 to 1y 3 bus outputs 19 2oe output enable input (active low) 20 v cc positive supply voltage logic symbol (ieee/iec) sv00666 18 16 14 12 2 4 6 8 en 1 9 7 5 3 11 13 15 17 en 19 functional diagram sv00622 2y 0 3 2y 1 5 2y 2 7 2y 3 9 2a 0 17 2a 1 15 2a 2 13 2a 3 11 2oe 19 1y 0 18 1y 1 16 1y 2 14 1y 3 12 1a 0 2 1a 1 4 1a 2 6 1a 3 8 1oe 1 function table inputs output noe na n ny n l l l l h h h x z notes: h = high voltage level l = low voltage level x = don't care z = high impedance off-state
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 1998 may 20 4 recommended operating conditions symbol parameter conditions min typ max unit v cc dc supply voltage see note 1 1.0 3.3 5.5 v v i input voltage 0 v cc v v o output voltage 0 v cc v t amb operating ambient temperature range in free air see dc and ac characteristics 40 40 +85 +125 c t r , t f input rise and fall times v cc = 1.0v to 2.0v v cc = 2.0v to 2.7v v cc = 2.7v to 3.6v v cc = 3.6v to 5.5v 500 200 100 50 ns/v note: 1. the lv is guaranteed to function down to v cc = 1.0v (input levels gnd or v cc ); dc characteristics are guaranteed from v cc = 1.2v to v cc = 5.5v. absolute maximum ratings 1, 2 in accordance with the absolute maximum rating system (iec 134). voltages are referenced to gnd (ground = 0v). symbol parameter conditions rating unit v cc dc supply voltage 0.5 to +7.0 v i ik dc input diode current v i < 0.5 or v i > v cc + 0.5v 20 ma i ok dc output diode current v o < 0.5 or v o > v cc + 0.5v 50 ma i o dc output source or sink current bus driver outputs 0.5v < v o < v cc + 0.5v 35 ma i gnd , i cc dc v cc or gnd current for types with bus driver outputs 70 ma t stg storage temperature range 65 to +150 c p tot power dissipation per package plastic dil plastic mini-pack (so) plastic shrink mini-pack (ssop and tssop) for temperature range: 40 to +125 c above +70 c derate linearly with 12 mw/k above +70 c derate linearly with 8 mw/k above +60 c derate linearly with 5.5 mw/k 750 500 400 mw notes: 1. stresses beyond those listed may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under arecommended operating conditionso is not implied. exposur e to absolute-maximum-rated conditions for extended periods may affect device reliability. 2. the input and output voltage ratings may be exceeded if the input and output current ratings are observed.
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 1998 may 20 5 dc electrical characteristics over recommended operating conditions. voltages are referenced to gnd (ground = 0v). limits symbol parameter test conditions -40 c to +85 c -40 c to +125 c unit min typ 1 max min max v cc = 1.2v 0.9 0.9 v high level input v cc = 2.0v 1.4 1.4 v v ih voltage v cc = 2.7 to 3.6v 2.0 2.0 v v cc = 4.5 to 5.5v 0.7 v cc 0.7 v cc v cc = 1.2v 0.3 0.3 v low level input v cc = 2.0v 0.6 0.6 v v il voltage v cc = 2.7 to 3.6v 0.8 0.8 v v cc = 4.5 to 5.5 0.3 v cc 0.3 v cc v cc = 1.2v; v i = v ih or v il; i o = 100 m a 1.2 high l l t t v cc = 2.0v; v i = v ih or v il; i o = 100 m a 1.8 2.0 1.8 v oh high level output voltage ; all out p uts v cc = 2.7v; v i = v ih or v il; i o = 100 m a 2.5 2.7 2.5 v voltage all out uts v cc = 3.0v; v i = v ih or v il; i o = 100 m a 2.8 3.0 2.8 v cc = 4.5v; v i = v ih or v il; i o = 100 m a 4.3 4.5 4.3 v o high level output voltage ; bus driver v cc = 3.0v; v i = v ih or v il; i o = 8ma 2.40 2.82 2.20 v v oh voltage; bus driver outputs v cc = 4.5v; v i = v ih or v il; i o = 16ma 3.60 4.20 3.50 v v cc = 1.2v; v i = v ih or v il; i o = 100 m a 0 low l l t t v cc = 2.0v; v i = v ih or v il; i o = 100 m a 0 0.2 0.2 v ol low level output voltage ; all out p uts v cc = 2.7v; v i = v ih or v il; i o = 100 m a 0 0.2 0.2 v voltage all out uts v cc = 3.0v; v i = v ih or v il; i o = 100 m a 0 0.2 0.2 v cc = 4.5v; v i = v ih or v il; i o = 100 m a 0 0.2 0.2 v o low level output voltage ; bus driver v cc = 3.0v; v i = v ih or v il; i o = 8ma 0.25 0.40 0.50 v v ol voltage; bus driver outputs v cc = 4.5v; v i = v ih or v il; i o = 16ma 0.35 0.55 0.65 v i i input leakage current v cc = 5.5v; v i = v cc or gnd 1.0 1.0 m a i oz 3-state output off-state current v cc = 3.6v; v i = v ih or v il; v o = v cc or gnd 5 10 m a i cc quiescent supply current; msi v cc = 5.5v; v i = v cc or gnd; i o = 0 20.0 160 m a d i cc additional quiescent supply current per input v cc = 2.7v to 3.6v; v i = v cc 0.6v 500 850 m a note: 1. all typical values are measured at t amb = 25 c.
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 1998 may 20 6 ac characteristics gnd = 0v; t r = t f 2.5ns; c l = 50pf; r l =1k w condition limits symbol parameter waveform condition 40 to +85 c 40 to +125 c unit v cc (v) min typ 1 max min max 1.2 50 pro p agation delay 2.0 17 24 31 t phl/ t plh pro agation delay 1a n to 1y n ; 2a to 2y figures 1, 2 2.7 13 17 23 ns 2a n t o 2y n 3.0 to 3.6 9 2 14 18 4.5 to 5.5 12 15 1.2 65 3 - state out p ut enable time 2.0 22 39 49 t pzh/ t pzl 3-state out ut enable time 1oe to 1y n ; 2oe to 2y figures 2, 3 2.7 16 29 36 ns 2oe t o 2y n 3.0 to 3.6 12 2 23 29 4.5 to 5.5 19 24 1.2 60 3 - state out p ut disable time 2.0 22 34 43 t phz/ t plz 3-state out ut disable time 1oe to 1y n ; 2oe to 2y figures 2, 3 2.7 17 24 32 ns 2oe t o 2y n 3.0 to 3.6 13 2 21 26 4.5 to 5.5 16 19 notes: 1. unless otherwise stated, all typical values are measured at t amb = 25 c. 2. typical values are measured at v cc = 3.3 v. ac waveforms v m = 1.5 v at v cc 2.7 v and 3.6 v v m = 0.5 v cc at v cc < 2.7 v and 4.5 v v ol and v oh are the typical output voltage drop that occur with the output load. v x = v ol + 0.3 v at v cc 2.7 v and 3.6 v v x = v ol + 0.1 v cc at v cc < 2.7 v and 4.5 v v y = v oh 0.3 v at v cc 2.7v and 3.6 v v y = v oh 0.1 v cc at v cc < 2.7 v and 4.5 v sv00617 v m 1a n , 2a n inputs 1y n , 2y n output v m t plh t phl gnd v ol v i v oh figure 1. input (1a n , 2a n ) to output (1y n , 2y n ) propagation delays. sv00623 outputs disabled outputs enabled outputs enabled t phz t pzh t pzl t plz high-to-off off-to-high low-to-off off-to-low v m v m oe input v x v ol v oh v y gnd gnd v cc v i v m q n output q n output figure 2. 3-state enable and disable times.
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 1998 may 20 7 test circuit switch position pulse generator r t v i d.u.t. v o c l r l = 1k v cc test circuit for outputs definitions v cc v i < 2.7v v cc test t plh/ t phl r t = termination resistance should be equal to z out of pulse generators. 2.7v 2.73.6v 4.5v v cc 50 pf sv00896 s 1 t plz/ t pzl t phz/ t pzh open 2 * v cc gnd r l = 1k open 2 * v cc gnd r l = load resistor c l = load capacitance includes jig and probe capacitiance. figure 3. load circuitry for switching times.
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 1998 may 20 8 dip20: plastic dual in-line package; 20 leads (300 mil) sot146-1
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 1998 may 20 9 so20: plastic small outline package; 20 leads; body width 7.5 mm sot163-1
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 1998 may 20 10 ssop20: plastic shrink small outline package; 20 leads; body width 5.3 mm sot339-1
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 1998 may 20 11 tssop20: plastic thin shrink small outline package; 20 leads; body width 4.4 mm sot360-1
philips semiconductors product specification 74lv244 octal buffer/line driver (3-state) 1998 may 20 12 philips semiconductors and philips electronics north america corporation reserve the right to make changes, without notice, in the products, including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performanc e. philips semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under a ny patent, copyright, or mask work right to these products, and makes no representations or warranties that these products are free from patent, copy right, or mask work right infringement, unless otherwise specified. applications that are described herein for any of these products are for illustrative purposes only. philips semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing or modification. life support applications philips semiconductors and philips electronics north america corporation products are not designed for use in life support appl iances, devices, or systems where malfunction of a philips semiconductors and philips electronics north america corporation product can reasonab ly be expected to result in a personal injury. philips semiconductors and philips electronics north america corporation customers using or sel ling philips semiconductors and philips electronics north america corporation products for use in such applications do so at their own risk and agree to fully indemnify philips semiconductors and philips electronics north america corporation for any damages resulting from such improper use or sale. this data sheet contains preliminary data, and supplementary data will be published at a later date. philips semiconductors reserves the right to make changes at any time without notice in order to improve design and supply the best possible product. philips semiconductors 811 east arques avenue p.o. box 3409 sunnyvale, california 940883409 telephone 800-234-7381 definitions data sheet identification product status definition objective specification preliminary specification product specification formative or in design preproduction product full production this data sheet contains the design target or goal specifications for product development. specifications may change in any manner without notice. this data sheet contains final specifications. philips semiconductors reserves the right to make changes at any time without notice, in order to improve design and supply the best possible product. ? copyright philips electronics north america corporation 1998 all rights reserved. printed in u.s.a. print code date of release: 05-96 document order number: 9397-750-04437

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