1/10 february 2003 n 5v tolerant inputs and outputs n high speed : t pd = 4.4 ns (max.) at v cc =3v n power down protection on inputs and outputs n symmetrical output impedance: |i oh |=i ol = 12ma (min) at v cc =3v n pci bus levels guaranteed at 12 ma n balanced propagation delays: t plh @ t phl n 26 w serie resistors in outputs n operating voltage range: v cc (opr) = 2.0v to 3.6v (1.5v data retention) n pin and function compatible with 74 series 162244 n latch-up performance exceeds 500ma (jesd 17) n esd performance: hbm > 2000v (mil std 883 method 3015); mm > 200v description the 74LCX162244 is a low voltage cmos 16 bit bus buffer (non-inverted) fabricated with sub-micron silicon gate and double-layer metal wiring c 2 mos technology. it is ideal for low power and high speed 3.3v applications; it can be interfaced to 5v signal environment for both inputs and outputs. any ng output control governs four bus buff- ers. output enable input (ng ) tied together gives full 16-bit operation. when ng is low, the outputs are on. when ng is high, the output are in high impedance state. this device is designed to be used with 3 state memory address drivers, etc. the device circuits is including 26 w series resis- tance in the outputs. these resistors permit to re- duce line noise in high speed applications. all inputs and outputs are equipped with protec- tion circuits against static discharge, giving them 2kv esd immunity and transient excess voltage. 74LCX162244 low voltage cmos 16-bit bus buffer (3-state) with 5v tolerant inputs and outputs order codes package tube t & r tssop 74LCX162244ttr tssop pin connection
74LCX162244 2/10 input and output equivalent circuit pin description truth table x : dont care z : high impedance iec logic symbols pin no symbol name and function 11g output enable input 2, 3, 5, 6 1y1 to 1y4 data outputs 8, 9, 11, 12 2y1 to 2y4 data outputs 13, 14, 16, 17 3y1 to 3y4 data outputs 19, 20, 22, 23 4y1 to 4y4 data outputs 24 4g output enable input 25 3g output enable input 30, 29, 27, 26 4a1 to 4a4 data outputs 36, 35, 33, 32 3a1 to 3a4 data outputs 41, 40, 38, 37 2a1 to 2a4 data outputs 47, 46, 44, 43 1a1 to 1a4 data outputs 48 2g output enable input 4, 10, 15, 21, 28, 34, 39, 45 gnd ground (0v) 7, 18, 31, 42 v cc positive supply voltage inputs output g an yn lll lhh hxz
74LCX162244 3/10 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) i o absolute maximum rating must be observed 2) v o 74LCX162244 4/10 dc specifications dynamic switching characteristics 1) number of outputs defined as "n". measured with "n-1" outputs switching from high to low or low to high. the remaining output is measured in the low state. symbol parameter test condition value unit v cc (v) -40to85c -55to125c min. max. min. max. v ih high level input voltage 2.7to3.6 2.0 2.0 v v il low level input voltage 0.8 0.8 v v oh high level output voltage 2.7to3.6 i o =-100 m av cc -0.2 v cc -0.2 v 2.7 i o =-8 ma 2.0 2.0 3.0 i o =-6 ma 2.4 2.4 i o =-12 ma 2.0 2.0 v ol low level output voltage 2.7to3.6 i o =100 m a 0.2 0.2 v 2.7 i o =8 ma 0.6 0.6 3.0 i o =6 ma 0.55 0.55 i o =12 ma 0.8 0.8 i i input leakage current 2.7to3.6 v i = 0 to 5.5v 5 5 m a i off power off leakage current 0 v i or v o =5.5v 10 10 m a i oz high impedance output leakage current 2.7to3.6 v i =v ih or v il v o = 0 to v cc 5 5 m a i cc quiescent supply current 2.7to3.6 v i =v cc or gnd 20 20 m a v i or v o = 3.6 to 5.5v 20 20 d i cc i cc incr. per input 2.7to3.6 v ih =v cc -0.6v 500 500 m a symbol parameter test condition value unit v cc (v) t a =25c min. typ. max. v olp dynamic low level quiet output (note 1) 3.3 c l =50pf v il =0v,v ih = 3.3v 0.8 v v olv -0.8
74LCX162244 5/10 ac electrical characteristics 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 (t oslh =|t plhm -t plhn |, t oshl =|t phlm -t phln |) 2) parameter guaranteed by design capacitive characteristics 1) c pd is defined as the value of the ics 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 xv cc xf in +i cc /16 (per circuit) symbol parameter test condition value unit v cc (v) c l (pf) r l ( w ) t s = t r (ns) -40 to 85 c -55 to 125 c min. max. min. max. t plh t phl propagation delay time 2.7 50 500 2.5 1.5 5.6 1.5 6.5 ns 3.0 to 3.6 1.5 4.4 1.5 5.1 t pzl t pzh output enable time 2.7 50 500 2.5 1.5 6.3 1.5 7.2 ns 3.0 to 3.6 1.5 5.9 1.5 6.8 t plz t phz output disable time 2.7 50 500 2.5 1.5 6.3 1.5 7.2 ns 3.0 to 3.6 1.5 5.9 1.5 6.8 t oslh t oshl output to output skew time (note1, 2) 3.0 to 3.6 50 500 2.5 1.0 1.0 ns symbol parameter test condition value unit v cc (v) t a =25c min. typ. max. c in input capacitance 4pf c out output capacitance 10 pf c pd power dissipation capacitance (note 1) 3.3 f in = 10mhz v in = 0 or v cc 50 pf
74LCX162244 6/10 test circuit c l = 50 pf or equivalent (includes jig and probe capacitance) r l =r1=500 w or equivalent r t =z out of pulse generator (typically 50 w ) waveform 1 : propagation delays (f=1mhz; 50% duty cycle) test switch t plh ,t phl open t pzl ,t plz 6v t pzh ,t phz gnd
74LCX162244 7/10 waveform 2 : output enable and disable time (f=1mhz; 50% duty cycle)
74LCX162244 8/10 dim. mm. inch min. typ max. min. typ. max. a 1.2 0.047 a1 0.05 0.15 0.002 0.006 a2 0.9 0.035 b 0.17 0.27 0.0067 0.011 c 0.09 0.20 0.0035 0.0079 d 12.4 12.6 0.488 0.496 e 8.1 bsc 0.318 bsc e1 6.0 6.2 0.236 0.244 e 0.5 bsc 0.0197 bsc k0? 8?0? 8? l 0.50 0.75 0.020 0.030 tssop48 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 7065588c
74LCX162244 9/10 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 8.7 8.9 0.343 0.350 bo 13.1 13.3 0.516 0.524 ko 1.5 1.7 0.059 0.067 po 3.9 4.1 0.153 0.161 p 11.9 12.1 0.468 0.476 tape & reel tssop48 mechanical data
74LCX162244 10/10 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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