74LCX374 octal d-type flip flop non inverting with 5v tolerant inputs and outputs preliminary data january 1997 n 5v tolerant inputs and outputs n high speed: f max = 150 mhz (min.) 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 374 n latch-up performance exceeds 500ma n esd performance: hbm >2000v; mm > 200v description the lcx374 is a low voltage cmos octal d-type flip flop 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 applications; it can be interfaced to 5v signal enviroment for both inputs and outputs. these 8 bit d-type flip-flops are controlled by a clock input (ck) and an output enable input (oe). on the positive transition of the clock, the q outputs will be set to the logic state that were setup at the d inputs. while the (oe) input is low, the 8 outputs will be in a normal state (high or low logic level) and while high level the outputs will be in a high impedance state. the output control does not affect the internal operation of flip flops; that is, the old data can be retained or the new data can be entered even while the outputs are off. it has same speed performance at 3.3v than 5v, ac/act family, combined with a lower power consumption. 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. pin connection and iec logic symbols order codes : 74LCX374m 74LCX374t m (micro package) t (tssop package) 1/10
pin description pin no symbol name and function 1 oe 3 state output enable input (active low) 2, 5, 6, 9, 12, 15, 16, 19 q0 to q7 3 state outputs 3, 4, 7, 8, 13, 14, 17, 18 d0 to d7 data inputs 11 clock clock input (low to high, edge triggered) 10 gnd ground (0v) 20 v cc positive supply voltage truth table inputs outputs oe ck d q hxx z l x no change lll lhh logic diagram input and output equivalent circuit 74LCX374 2/10
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 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 74LCX374 3/10
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 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 off power off leakage current 0 v i or v o = 5.5v 100 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 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. 74LCX374 4/10
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 6 pf c out output capacitance 3.3 v in = 0 to v cc 12 pf c pd power dissipation capacitance (note 1) 3.3 f in = 10mhz v in = 0 or v cc 32 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 9.5 ns 3.0 to 3.6 1.5 8.5 t pzl t pzh output enable time to high and low level 2.7 2 1.5 9.5 ns 3.0 to 3.6 1.5 8.5 t plz t phz output disable time from high and low level 2.7 2 1.5 8.5 ns 3.0 to 3.6 1.5 7.5 t s setup time, high or low level dn to cp 2.7 1 2.5 ns 3.0 to 3.6 2.5 t h hold time, high or low level dn to cp 2.7 1 1.5 ns 3.0 to 3.6 1.5 t w cp pulse width, high or low 2.7 3 3.3 ns 3.0 to 3.6 3.3 f max clock pulse frequency 3.0 to 3.6 1 150 mhz 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 74LCX374 5/10
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: propagation delays, setup and hold times (f=1mhz; 50% duty cicle) 74LCX374 6/10
waveform 2: output enable and disable times (f=1mhz; 50% duty cicle) waveform 3: pulse width 74LCX374 7/10
so20 mechanical data dim. mm inch min. typ. max. min. typ. max. a 2.65 0.104 a1 0.10 0.20 0.004 0.007 a2 2.45 0.096 b 0.35 0.49 0.013 0.019 b1 0.23 0.32 0.009 0.012 c 0.50 0.020 c1 45 (typ.) d 12.60 13.00 0.496 0.512 e 10.00 10.65 0.393 0.419 e 1.27 0.050 e3 11.43 0.450 f 7.40 7.60 0.291 0.299 l 0.50 1.27 0.19 0.050 m 0.75 0.029 s8 (max.) p013l 74LCX374 8/10
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 0.2 0.0035 0.0079 d 6.4 6.5 6.6 0.252 0.256 0.260 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 tssop20 mechanical data 74LCX374 9/10
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 . 74LCX374 10/10
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