74LCX16240A low voltage cmos 16-bit buffer (3-state inv.) with 5v tolerant inputs and outputs preliminary data june 1997 order codes : 74LCX16240At n 5v tolerant inputs and outputs n high speed: t pd =4.9 ns (max.) at v cc =3.0v n power-down protection on inputs and outputs n symmetrical output impedance: |i oh |=i ol =24ma(min) n pci bus levels guaranteed at 24ma n balanced propagation delays: t plh @ t phl n operating voltage range: v cc (opr) = 2.7v to 3.6v (1.5v data retention) n pin and function compatible with 74 series 16240 n latch-up performance exceeds 500ma n esd performance: hbm >2000v; mm > 200v description the lcx16240a is a low voltage cmos 16-bit bus buffer 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 enviroment for both inputs and outputs. any ng control output governs four bus buffers. 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. it has better speed performance at 3.3v than 5v lsttl family combined with the true cmos low power consumption. all inputs and outputs are equipped with protection circuits against static discharge, giving them 2kv esd immunity and transient excess voltage. t (tssop48 package) pin connection 1/8
truth table input out put ganyn llh lhl hxz x: oho or olo z: high impedance input and output equivalent circuit iec logic symbols pin description pin no symbol name and function 1 1g 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 inputs 36, 35, 33, 32 3a1 to 3a4 data inputs 41, 40, 38, 37 2a1 to 2a4 data inputs 47, 46, 44, 43 1a1 to 1a4 data inputs 48 2g output enabel input 4, 10, 15, 21, 28, 34, 39, 45 gnd ground (0v) 7, 18, 31, 42 v cc positive supply voltage 74LCX16240A 2/8
absolute maximum ratings symbol parameter value unit v cc supply voltage -0.5 to + 7.0 v v i dc input voltage -0.5 to + 7.0 v v o dc output voltage (off state) -0.5 to + 7.0 v v o dc output voltage (high or low state) (note1) -0.5 to v cc +0.5 v i ik dc input diode current - 50 ma i ok dc output diode current (note2) 50 ma i o dc output source/sink current 50 ma i cc or i gnd dc v cc or ground current per supply pin 100 ma t stg storage temperature -65 to +150 o c t l lead temperature (10 sec) 300 o c absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. 1) i o absolute maximum rating must be observed 2) v o v cc recommended operating conditions 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 = 2.7 to 3.0v) 12 ma t op operating temperature: -40 to +85 o c dt/dv input transition rise or fall rate (v cc = 3.0v) (note 2) 0 to 10 ns/v 1) truth table guaranteed: 1.5v to 3.6v 2) v in from 0.8v to 2.0v 74LCX16240A 3/8
dc specifications symbol parameter test conditions value unit v cc (v) -40 to 85 o c min. max. v ih high level input voltage 2.7 to 3.6 2.0 v v il low level input voltage 0.8 v v oh high level output voltage 2.7 to 3.6 v i =v ih or v il i o =-100 m av cc -0.2 v 2.7 i o =-12 ma 2.2 3.0 i o =-18 ma 2.4 i o =-24 ma 2.2 v ol low level output voltage 2.7 to 3.6 v i =v ih or v il i o =100 m a0.2 v 2.7 i o =12 ma 0.4 3.0 i o =16 ma 0.4 3.0 i o =24 ma 0.55 i i input leakage current 2.7 to 3.6 v i =0 to5.5v 5 m a i oz 3 state output leakage current 2.7 to 3.6 v i =v ih or v il v o =0to5.5v 5 m a i off power off leakage current 0 v i or v o = 5.5v (per pin) 10 m a i cc quiescent supply current 2.7 to 3.6 v i =v cc or gnd 20 m a v i or v o = 3.6to5.5v 20 d i cc icc incr. per input 2.7 to 3.6 v ih =v cc -0.6v 500 m a dynamic switching characteristics symbol parameter test conditions value unit v cc (v) t a =25 o c min. typ. max. v olp dynamic low voltage quiet output (note 1) 3.3 c l =50pf v il =0v v ih =3.3v 0.8 v v olv -0.8 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. 74LCX16240A 4/8
test circuit test switch t plh ,t phl open t pzl ,t plz 6v t pzh ,t phz gnd c l = 50 pf or equivalent (includes jig and probe capacitance) r l =r 1 = 500 w or equivalent r t =z out of pulse generator (typically 50 w ) capacitive characteristics symbol parameter test conditions value unit v cc (v) t a =25 o c min. typ. max. c in input capacitance 3.3 v in =0tov cc 7 pf c out output capacitance 3.3 v in =0tov cc 15 pf c pd power dissipation capacitance (note 1) 3.3 f in = 10mhz v in =0orv cc 60 pf 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. average operting current can be obtained by the following equation. i cc (opr) = c pd ? v cc ? f in +i cc /n (per circuit) ac electrical characteristics (c l = 50 pf, r l = 500 w , input t r =t f = 2.5 ns) symbol parameter test condition value unit v cc (v) waveform -40 to 85 o c min. max. t plh t phl propagation delay time 2.7 1 1.5 5.9 ns 3.0to3.6 1.5 4.9 t pzl t pzh output enable time 2.7 2 1.5 7.5 ns 3.0to3.6 1.5 6.5 t plz t phz output disable time 2.7 2 1.5 6.5 ns 3.0to3.6 1.5 5.5 t oslz t oshl output to output skew time (note 1, 2) 3.0 to 3.6 1.0 ns 1) skew is defined as the absolute value of the difference between the actual propagation delay for any two outputs of the same device switching 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 74LCX16240A 5/8
waveform 1: propagation delays (f=1mhz; 50% duty cicle) waveform 2: output enable and disable time (f=1mhz; 50% duty cicle) 74LCX16240A 6/8
dim. mm inch min. typ. max. min. typ. max. a 1.1 0.433 a1 0.05 0.10 0.15 0.002 0.004 0.006 a2 0.85 0.9 0.95 0.335 0.354 0.374 b 0.17 0.27 0.0067 0.011 c 0.09 0.20 0.0035 0.0079 d 12.4 12.5 12.6 0.408 0.492 0.496 e 7.95 8.1 8.25 0.313 0.319 0.325 e1 6.0 6.1 6.2 0.236 0.240 0.244 e 0.5 bsc 0.0197 bsc k0 o 4 o 8 o 0 o 4 o 8 o l 0.50 0.60 0.70 0.020 0.024 0.028 c e b a2 a e1 d 1 pin 1 identification a1 l k e tssop48 mechanical data 74LCX16240A 7/8
information furnished is believed to be accurate and reliable. however, sgs-thomson microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. no license is granted by implication or otherwise under any patent or patent rights of sgs-thomson microelectronics. specifications mentioned in this publication are subject to change without notice. this publication supersede s and replaces all information previously supplied. sgs-thomson microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of sgs-thomson microelectonics. ? 1997 sgs-thomson microelectronics - printed in italy - all rights reserved sgs-thomson microelectronics group of companies australia - brazil - canada - china - france - germany - hong kong - italy - japan - korea - malaysia - malta - morocco - the netherlands - singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a . 74LCX16240A 8/8
|
