74LCX16373A low voltage 16-bit d-type latch 3-state with 5v tolerant inputs and output preliminary data november 1997 order codes : 74lcx16373t n 5v tolerant inputs and outputs n high speed: t pd = 5.4 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 16373 n latch-up performance exceeds 500ma n esd performance: hbm >2000v; mm > 200v description the lcx16373 is a low level cmos 16-bit d-type latch with 3 state output non inverting 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 16 bit d-type latchs are byte controlled by two latch enable inputs (nle) and two output enable inputs (noe). while the nle input is held at a high level, the nq outputs will follow the data input precisely. when the nle is taken low, the nq outputs will be latched precisely at the logic level of d input data. while the (noe) input is low, the nq outputs will be in a normal logic state (high or low logic level) and while high level the outputs will be in a high impedance state. 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 1/9
input and output equivalent circuit iec logic symbols pin description pin no symbol name and function 1 1oe 3 state output enable input (active low) 2, 3, 5, 6, 8, 9, 11, 12 1q0 to 1q7 data inputs 13, 14, 16, 17, 19, 20, 22, 23 2q0 to 2q7 data inputs 24 2oe 3 state output enable input (active low) 25 2le latch enable input 36, 35, 33, 32, 30, 29, 27, 26 2d0 to 2d7 3 state outputs 47, 46, 44, 43, 41, 40, 38, 37 1d0 to 1d7 3 state outputs 48 1le latch enable input 4, 10, 15, 21, 28, 34, 39, 45 gnd ground (0v) 7, 18, 31, 42 v cc positive supply voltage truth table inputs outputs oe le d q hxx z llxnochange* lhl l lhh h x: don't care z: high impedance * q output are latched at the time when the le inputs taken low logic 74LCX16373A 2/9
logic diagram 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 74LCX16373A 3/9
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. 74LCX16373A 4/9
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 8 pf c pd power dissipation capacitance (note 1) 3.3 f in = 10mhz v in =0orv cc 20 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 dn to qn 2.7 1 1.5 8.0 ns 3.0to3.6 1.5 7.0 t plh t phl propagation delay time le to qn 2.7 1 1.5 8.0 ns 3.0to3.6 1.5 7.0 t pzl t pzh output enable time to high and low level 2.7 2 1.5 8.2 ns 3.0to3.6 1.5 7.2 t plz t phz output disable time from high and low level 2.7 2 1.5 8.2 ns 3.0to3.6 1.5 7.2 t s setup time, high or low level dn to le 2.7 1 2.5 ns 3.0to3.6 2.5 t h hold time, high or low level dn to le 2.7 1 1.5 ns 3.0to3.6 1.5 t w le pulse width, high or low 2.7 3 4.0 ns 3.0to3.6 3.0 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 74LCX16373A 5/9
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 ) waveform 1: le to qn propagation delays, le minimum pulse width, dn to le setup and hold times (f=1mhz; 50% duty cycle) 74LCX16373A 6/9
waveform 2: output enable and disable times (f=1mhz; 50% duty cycle) waveform 3: propagation delay time (f=1mhz; 50% duty cycle) 74LCX16373A 7/9
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 74LCX16373A 8/9
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 - italy - japan - korea - malaysia - malta - morocco - the netherlands - singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a ... 74LCX16373A 9/9
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