1/9 january 2002 n 5v tolerant inputs and outputs n high speed : t pd = 4.5 ns (max.) at v cc =3v n power down protection on inputs and outputs n symmetrical output impedance: |i oh |=i ol = 24ma (min) at v cc =3v n pci bus levels guaranteed at 24 ma n balanced propagation delays: t plh @ t phl n operating voltage range: v cc (opr) = 2.0v to 3.6v (1.5v data retention) n pin and function compatible with 74 series h16245 n bus hold provided on both sides n latch-up performance exceeds 500ma (jesd 17) n esd performance: hbm > 2000v (mil std 883 method 3015); mm > 200v description the 74lcxh16245 is a low voltage cmos 16 bit bus transceiver (3-state) 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. this ic is intended for two-way asynchronous communication between data buses; the direction of data transmission is determined by dir input. the two enable inputs ng can be used to disable the device so that the buses are effectively isolat- ed. bus hold on data inputs is provided in order to eliminate the need for external pull-up or pull-down resistor. it has same speed performance at 3.3v than 5v ac/act family, combined with a lower power con- sumption. all inputs and outputs are equipped with protec- tion circuits against static discharge, giving them 2kv esd immunity and transient excess voltage. 74lcxh16245 low voltage cmos 16-bit bus transceiver with 5v tolerant inputs and output (3-state) order codes package tube t & r tssop 74LCXH16245TTR tssop pin connection
74lcxh16245 2/9 input and output equivalent circuit pin description truth table x : don`t care z : high impedance iec logic symbols pin no symbol name and function 1 1dir directional control 2, 3, 5, 6, 8, 9, 11, 12 1b1 to 1b8 data inputs/outputs 13, 14, 16, 17, 19, 20, 22, 23 2b1 to 2b8 data inputs/outputs 24 2dir directional control 25 2g output enable input 36, 35, 33, 32, 30, 29, 27, 26 2a1 to 2a8 data inputs/outputs 47, 46, 44, 43, 41, 40, 38, 38 1a1 to 1a8 data inputs/outputs 48 1g output enable input 4, 10, 15, 21, 28, 34, 39, 45 gnd ground (0v) 7, 18, 31, 42 v cc positive supply voltage inputs function output g dir a bus b bus yn l l output input a = b l h input output b = a hxzzz
74lcxh16245 3/9 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 < gnd recommended operating conditions 1) truth table guaranteed: 1.5v to 3.6v 2) v in from 0.8v to 2v at v cc = 3.0v symbol parameter value unit v cc supply voltage -0.5 to +7.0 v v i dc input voltage (dir, g) -0.5 to +7.0 v v i/o bus i/o voltage (off state) -0.5 to +7.0 v v i/o bus i/o voltage (high or low state) (note 1) -0.5 to v cc + 0.5 v i ik dc input diode current -50 ma i ok dc output diode current (note 2) -50 ma i o dc output current 50 ma i cc dc supply current per supply pin 100 ma i gnd dc ground current per supply pin 100 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 (note 1) 2.0 to 3.6 v v i input voltage 0 to 5.5 v v o output voltage (off state) 0 to 5.5 v v o output voltage (high or low state) 0 to v cc v i oh ,i ol high or low level output current (v cc = 3.0 to 3.6v) 24 ma i oh ,i ol high or low level output current (v cc = 2.7v) 12 ma t op operating temperature -55 to 125 c dt/dv input rise and fall time (note 2) 0 to 10 ns/v
74lcxh16245 4/9 dc specifications dynamic switching characteristics 1) number of outputs defined as ono. measured with on-1o 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) -40 to 85 c -55 to 125 c min. max. min. max. v ih high level input voltage 2.7 to 3.6 2.0 2.0 v v il low level input voltage 0.8 0.8 v v oh high level output voltage 2.7 to 3.6 i o =-100 m av cc -0.2 v cc -0.2 v 2.7 i o =-12 ma 2.2 2.2 3.0 i o =-18 ma 2.4 2.4 i o =-24 ma 2.2 2.2 v ol low level output voltage 2.7 to 3.6 i o =100 m a 0.2 0.2 v 2.7 i o =12 ma 0.4 0.4 3.0 i o =16 ma 0.4 0.4 i o =24 ma 0.55 0.55 i i input leakage current 2.7 to 3.6 v i = 0 to 5.5v 5 10 m a i i(hold) input hold current 3.0 v i = 0.8v 75 75 m a v i =2v -75 -75 3.6 v i = 0 to 3.6v 500 500 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 2.7 to 3.6 v i =v ih or v il v o = 0 to v cc 10 10 m a i cc quiescent supply current 2.7 to 3.6 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 2.7 to 3.6 v ih =v cc - 0.6v 500 500 m a symbol parameter test condition value unit v cc (v) t a =25 c 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
74lcxh16245 5/9 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 ic's 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 conditi on 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 5.2 1.5 6.0 ns 3.0 to 3.6 1.5 4.5 1.5 5.3 t pzl t pzh output enable time 2.7 50 500 2.5 1.5 7.2 1.5 8.3 ns 3.0 to 3.6 1.5 6.5 1.5 7.3 t plz t phz output disable time 2.7 50 500 2.5 1.5 6.9 1.5 7.5 ns 3.0 to 3.6 1.5 6.4 1.5 7.2 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 =25 c min. typ. max. c in input capacitance 3.3 4 pf c out output capacitance 3.3 10 pf c pd power dissipation capacitance (note 1) 3.3 f in = 10mhz v in = 0 or v cc 50 pf
74lcxh16245 6/9 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 delay times (f=1mhz; 50% duty cycle) test switch t plh ,t phl open t pzl ,t plz 6v t pzh ,t phz gnd
74lcxh16245 7/9 waveform 2 : output enable and disable time (f=1mhz; 50% duty cycle)
74lcxh16245 8/9 dim. mm. inch min. typ max. min. typ. max. a 1.1 0.043 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 0.408 0.496 e 7.95 8.25 0.313 0.325 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 7065588a
74lcxh16245 9/9 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 from its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specifications 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 ? 2002 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 - malta - morocco singapore - spain - sweden - switzerland - united kingdom - united states. ? http://www.st.com
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