74LCX125 low voltage cmos quad bus buffers with 5v tolerant inputs and outputs preliminary data january 1997 pin connection and iec logic symbols n 5v tolerant inputs and outputs n high speed: t pd = 6 ns (max.) at v cc =3v 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) = 2.0v to 3.6v (1.5v data retention) n pin and function compatible with 74 series 125 n latch-up performance exceeds 500ma n esd performance: hbm >2000v; mm > 200v description the lvq125 is a low voltage cmos quad bus buffers 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. these devices require the same 3-state control input g to be taken high to make the output go to the high impedance state. .it has same speed performance at 3.3v than 5v, ac/act family, combined with a lower power consumption. all inputs and outputs are equipped with protection circuits against static discharge, giving them 2kv esd immunity and transient excess voltage. order codes : 74lvq125m 74lvq125t m (micro package) t (tssop package) 1/8
truth table agy xhz lll hlh pin description pin no symbol name and function 1, 4, 10, 13 g1 to g4 output enable inputs 2, 5, 9, 12 a1 to a4 data inputs 3, 6, 8, 11 y1 to y4 data outputs 7 gnd ground (0v) 14 v cc positive supply voltage input and output equivalent circuit 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 (v cc =0v) -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 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 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 74LCX125 2/8
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 (v cc =0v) 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 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. dc specifications symbol parameter test conditions value unit v cc (v) -40 to 85 o c min. max. v ih high level input voltage 2.7to3.6 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 a 0.2 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 2.7to3.6 v i = 0 to 5.5 v 5 m a i off power off leakage current 0 v i or v o = 5.5v 100 m a i oz 3 state output leakage current 2.7 to 3.6 v i =v ih or v il v o = 0 to 5.5v 5 m a i cc quiescent supply current 2.7 to 3.6 v i =v cc or gnd 10 m a v i or v o = 3.6 to 5.5v 10 d i cc icc incr. per input 2.7 to 3.6 v ih =v cc -0.6v 500 m a 74LCX125 3/8
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 = 0 to v cc 6pf c out output capacitance 3.3 v in = 0 to v cc 10 pf c pd power dissipation capacitance (note 1) 3.3 f in = 10mhz v in = 0 or v cc 40 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 6.5 ns 3.0 to 3.6 1.0 6.0 t pzl t pzh output enable time to high and low level 2.7 2 1.0 8.0 ns 3.0 to 3.6 1.0 7.0 t plz t phz output disable time from high and low level 2.7 2 1.0 7.0 ns 3.0 to 3.6 1.0 6.0 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 74LCX125 4/8
waveform 1: propagation delays (f=1mhz; 50% duty cycle) waveform 2: output enable and disable time (f=1mhz; 50% duty cycle) 74LCX125 5/8
dim. mm inch min. typ. max. min. typ. max. a 1.75 0.068 a1 0.1 0.2 0.003 0.007 a2 1.65 0.064 b 0.35 0.46 0.013 0.018 b1 0.19 0.25 0.007 0.010 c 0.5 0.019 c1 45 (typ.) d 8.55 8.75 0.336 0.344 e 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 7.62 0.300 f 3.8 4.0 0.149 0.157 g 4.6 5.3 0.181 0.208 l 0.5 1.27 0.019 0.050 m 0.68 0.026 s 8 (max.) p013g so14 mechanical data 74LCX125 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 0.19 0.30 0.0075 0.0118 c 0.09 0.20 0.0035 0.0079 d 4.9 5 5.1 0.193 0.197 0.201 e 6.25 6.4 6.5 0.246 0.252 0.256 e1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 bsc 0.0256 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 tssop14 mechanical data 74LCX125 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 . 74LCX125 8/8
|
