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1/11 july 2003 n high speed: t pd = 6.5 ns (max. 85c) at v cc =4.5v n low power dissipation: i cc = 80 a (max.) at v cc =5.5vt=85c n ttl compatible inputs v ih =2v(min.)v il =0.8v(max.) n operating voltage range: v cc (opr.) = 4.5v to 5.5v n a port have standard 4ma totem pole output n b port high drive source/sink capability of 14ma n support ieee std 1284-i (level 1 type) and ieee std 1284-ii (level 2 type) for bidirectional parallel communications between personal computer and printing peripherals. description the 74act1284 contains four high-speed non-in- verting bidirectional buffers and three non-invert- ing buffers with open drain outputs fabricated in silicon gate c 2 mos technology. its intended to provide a standard signaling meth- od for a bidirection parallel peripheral in an ex- tended capabilities port mode (ecp). the hd (active high) input pin enables the b ports to switch from open drain to a high drive totem pole output, capable of sourcing 14ma on all sev- en buffers. the dir input determines the direction of data flow on the bidirectional buffers. dir (active high) enables data flow from a port to b port. dir (active low) enables data flow from b port to a port. esd protection is greater than 2000v per method 3015.7 of mil-std-883b. its available in the commercial temperature ranges. 74act1284 high speed ieee1284 transceiver order codes package tube t & r sop 74act1284m 74ACT1284MTR tssop 74act1284ttr tssop sop pin connection
74act1284 2/11 logic diagram pin description truth table pin n. symbol name and function 1 - 4 a1 - a4 side a input or output 5, 6 gnd ground 7 - 9 a5 - a7 side a input 10 dir direction control input 11 hd high drive enable input 12 - 14 b5 - b7 side b output 15, 16 v cc power supply input function outputs dir hd ll b1 - b4 data to a1 - a4 a5 - a7 data to b5 - b7 b5 - b7 open drain l h b5 - b7 totem pole hl a1 - a7 data to b1 - b7 b1 - b7 open drain h h b1 - b7 totem pole
74act1284 3/11 absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these conditions is not implied. (1) the ac input voltage pulse width is limited to 20ns if the input voltage goes more negative than -0.5v. recommended operating conditions symbol parameter value unit v cc supply voltage -0.5 to +7 v v ia dc input voltage a side -0.5 to v cc + 0.5 v v ib dc input voltage b side -2 to +7 (1) v v oa dc output voltage a side -0.5 to v cc + 0.5 v v ob dc output voltage b side -2 to +7 (1) v i ik dc input diode current 20 ma i ok dc output diode current 50 ma i o dc output current 50 ma i cc or i gnd dc v cc or ground current 200 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 4.5 to 5.5 v v i input voltage 0 to v cc v v o output voltage hd = low 0 to 5.5 v t op operating temperature -40 to 85 c
74act1284 4/11 dc electrical characteristics ac electrical characteristics (f = 1mhz, t r =t f = 2.5ns) symbol parameter test condition value unit v cc (v) t a = 25c -40 to 85c min. typ. max. min. max. v ih high level input voltage 4.5 to 5.5 2.0 2.0 v v il low level input voltage 4.5 to 5.5 0.8 0.8 v v ohb high level output voltage b port 4.5 i oh = -14ma 3.86 3.76 v v oha high level output voltage a port 4.5 i o = -50 m a 4.4 4.4 v i o = -4ma 3.86 3.76 v olb low level output voltage b port 4.5 i oh = 14ma 0.4 0.4 v v ola low level output voltage a port 4.5 i o =50 m a 0.1 0.1 v i o =4ma 0.36 0.44 i i input current 5.5 v i =v cc or gnd (dir,a5,a6,a7,hd) 0.1 1 m a i cct max i cc /input 5.5 v i =v cc - 2.1v 0.6 1.5 ma i cc quiescent supply current 5.5 v i =v cc or gnd 880 m a i oz output leakage current 5.5 v o =v cc or gnd 0.5 5 m a i off b side power down leakage current 0 v o = 5.25v 440 m a v hys input hysteresis 5.0 v t + =v t 0.4 0.35 v z o output impedance b port 5.0 v b =v oh 824 w symbol parameter test condition value unit v cc (v) t a =25c -40 to 85c min. typ. max. min. max. t plh propagation delay time a1-a7tob1-b7 4.5 to 5.5 r l =500 w ,c l =50pf (fig. 1-2) 1 5.6 1 6.5 ns t phl 1 5.6 1 6.5 t plh propagation delay time b1-b4toa1-a4 4.5 to 5.5 r l =500 w ,c l =50pf (fig. 3) 1 7.5 1 8.5 ns t phl 1 7.5 1 8.5 t en enable delay time hd to b1 - b7 4.5 to 5.5 r s =33 w ,r l =62 w c l =50pf (fig. 2) 1 7.5 1 8.5 ns t dis disable delay time hd to b1 - b7 1 7.5 1 8.5 ns t r, t f t rise ,t fall b1 - b7 open drain 4.5 to 5.5 r pull_up =500 w c l =50pf (fig. 4) 120 120 ns c i control input capacitance (hd, dir, a5 - a7) open 4 pf c i/o i/o pin capacitance 5.0 12 pf
74act1284 5/11 test circuit c l = 50 pf or equivalent (includes jig and probe capacitance) r t =z out of pulse generator (typically 50 w ) figure 1 : propagation delay time test s1 s2 s2 t phl (a1-a7 to b1-b7) r l =62 w, r 1 =33 w ( see waveform 1) open v cc v cc t plh (a1-a7 to b1-b7) r l =62 w (see waveform 1) closed gnd gnd t phl ,t plh (b1-b4 to a1-a4) r l = 500 w (see waveform 2) closed gnd gnd t r ,t f (a1-a7 to b1-b7) r l =500 w (see waveform 1) closed v cc v cc t en (hd to b1-b7) r l =62 w, r 1 =33 w (see waveform 3) open gnd gnd t dis (hd to b1-b7) r l =62 w (see waveform 3) closed gnd gnd
74act1284 6/11 figure 2 : propagation delay time v mo =50%v cc figure 3 : enable and disable time
74act1284 7/11 dim. mm. inch min. typ max. min. typ. max. a 2.65 0.104 a1 0.1 0.2 0.004 0.008 a2 2.45 0.096 b 0.35 0.49 0.014 0.019 b1 0.23 0.32 0.009 0.012 c 0.5 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 0.300 l 0.50 1.27 0.020 0.050 m 0.75 0.029 s ? (max.) so-20 mechanical data po13l 8
74act1284 8/11 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
74act1284 9/11 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
74act1284 10/11 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
74act1284 11/11 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2003 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco singapore - spain - sweden - switzerland - united kingdom - united states. ? http://www.st.com

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