1 ps8503a 10/06/04 block diagram description pericom semiconductors PI74LPT374 8-bit wide octal resisters designed with eight d-type flip-flops, a buffered common clock, and buffered 3-state outputs. when output enable (oe) is low, the outputs are enabled. when oe is high, the outputs are in the high impedance state. input data meeting the setup and hold time requirements of the d inputs is transferred to the o outputs on the low-to-high transition of the clock input. the PI74LPT374 can be driven from either 3.3v or 5.0v devices allowing for the device to be used as a translator in a mixed 3.3v/5.0v system. PI74LPT374 fast cmos 3.3v octal d flip-flop pin confguration features ? compatible with lcx ? and lvt ? families of products ? supports 5v tolerant mixed signal mode operation C input can be 3v or 5v C output can be 3v or connected to 5v bus ? advanced low power cmos operation ? excellent output drive capability: balanced drives (24ma sink and source) ? low ground bounce outputs ? hysteresis on all inputs ? industrial operating temperature range: C40c to +85c ? packaging: C 20-pin 173-mil wide plastic tssop (l) C 20-pin 150-mil wide plastic qsop (q) C 20-pin 300-mil wide plastic soic (s) o e cp o 0 cp d d 0 to 7 other channels v pin description pin name description oe output enable input (active low) cp clock pulse, low-to-high transition d7-d0 data inputs o7-o0 3-state outputs gnd ground v cc power truth table (1) inputs outputs d n cp oe o n h l h l l l x x h z note: 1. h = high voltage level, x = dont care, l = low voltage level, z = high impedance 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 vc c o7 d7 d6 o6 o5 d5 d4 o4 cp oe o0 d0 d1 o1 o2 d2 d3 o3 gnd
2 ps8503a 10/06/04 PI74LPT374 fast cmos 3.3v octal d flip-flop storage temperature .......................................................... C65c to +150c ambient temperature with power applied ......................... C40c to +85c supply voltage to ground potential (inputs & v cc only) ... C0.5v to +7.0v supply voltage to ground potential (outputs & d/o only) C0.5v to +7.0v dc input voltage ............................................................... ... C0.5v to +7.0v dc output current ............................................................... ............. 120 ma power dissipation ............................................................... .................. 1.0w note: stresses greater than those listed under maximum rat - ings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other conditions above those indicated in the op - erational sections of this specifcation is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) dc electrical characteristics (over the operating range, t a = C40c to +85c, v cc = 2.7v to 3.6v) parameters description test conditions (1) min. typ (2) max. units v ih input high voltage (input pins) guaranteed logic high level 2.2 5.5 v input high voltage (i/o pins) 2.0 5.5 v il input low voltage (input and i/o pins) guaranteed logic low level C0.5 0.8 i ih input high current (input pins) v cc = max. v in = 5.5v 1 a input high current (i/o pins) v cc = max. v in = v cc 1 i il input low current (input pins) v cc = max. v in = gnd 1 input low current (i/o pins) v cc = max. v in = gnd 1 i ozh high impedance output current v cc = max. v out = 5.5v 1 i ozl ( 3-state output pins) v cc = max. v out = gnd 1 v ik clamp diode voltage v cc = min., i in = C18 ma C0.7 C1.2 v i odh output high current v cc = 3.3v, v in = v ih or v il , v o = 1.5v (3) C36 C60 C110 ma i odl output low current v cc = 3.3v, v in = v ih or v il , v o = 1.5v (3) 50 90 200 v oh output high voltage v cc = min. v in = v ih or v il i oh = C0.1 ma v cc -0.2 v i oh = C3 ma 2.4 3.0 v cc = 3.0v, v in = v ih or v il i oh = C8 ma 2.4 (5) 2.0 3.0 i oh = C24 m a v ol output low voltage v cc = min. i ol = 0.1 ma 0.2 v in = v ih or v il i ol = 16 ma 0.2 0.4 i ol = 24 ma 0.3 0.5 i os short circuit current (4) v cc = max. (3) , v out = gnd C60 C85 C240 ma i off power down disable v cc = 0v, v in or v out 4.5v 100 a v h input hysteresis 150 mv notes: 1. for max. or min. conditions, use appropriate value specifed under electrical characteristics for the applicable device type. 2. typical values are at v cc = 3.3v, +25c ambient and maximum loading. 3. not more than one output should be shorted at one time. duration of the test should not exceed one second. 4. this parameter is guaranteed but not tested. 5. v oh = v cc C 0.6v at rated current.
3 ps8503a 10/06/04 PI74LPT374 fast cmos 3.3v octal d flip-flop notes: 1. for conditions shown as max. or min., use appropriate value specif ed under electrical characteristics for the applicable device. 2. typical values are at v cc = 3.3v, +25c ambient. 3. per ttl driven input; all other inputs at v cc or gnd. 4. this parameter is not directly testable, but is derived for use in total power supply calculations. 5. values for these conditions are examples of the i cc formula. these limits are guaranteed but not tested. 6. i c =i quiescent + i inputs + i dynamic i c = i cc + i cc d h n t + i ccd ( f cp /2 + f i n i ) i cc = quiescent current (i ccl , i ccv and i ccz ) i cc = power supply current for a ttl high input d h = duty cycle for ttl inputs high n t = number of ttl inputs at d h i cc d = dynamic current caused by an input transition pair (hlh or lhl) f cp = clock frequency for register devices (zero for non-register devices) n cp = number of clock inputs at f cp f i = input frequency n i = number of inputs at f i all currents are in milliamps and all frequencies are in megahertz. capacitance ( t a = 25c, f = 1 mhz) parameters (1) description test conditions typ max. units c in input capacitance v in = 0v 4.5 6 pf c out output capacitance v out = 0v 5.5 8 note: 1. this parameter is determined by device characterization but is not production tested. power supply characteristics parameters description test conditions (1) min. typ (2) max. units i cc quiescent power supply current v cc = max. v in = gnd or v cc 0.1 10 a i cc quiescent power supply current ttl inputs high v cc = max. v in = v cc C 0.6v (3) 500 i ccd dynamic power supply (4) v cc = max., outputs open oe = gnd one bit toggling 50% duty cycle v in = v cc v in = gnd 50 75 a/ mhz i c total power supply current (6) v cc = max., outputs open f i = 10 mh z 50% duty cycle oe = gnd one bit toggling v in = v cc C 0.6v v in = gnd 0.6 2.3 ma v cc = max., outputs open f i = 2.5 mh z 50% duty cycle oe = gnd 8 bits toggling v in = v cc C 0.6v v in = gnd 2.1 4.7 (5)
4 ps8503a 10/06/04 PI74LPT374 fast cmos 3.3v octal d flip-flop switching characteristics over operating range (1) parameters description conditions (2) lpt374 lpt374c unit com. com. min (3) max min (3) max f max maximum clock frequency c l = 50 p f r l = 500 150 150 mhz t plh t phl propagation delay xclk to xox 2.0 8.0 2.0 4.5 ns t pzh t pzl output enable time (4) xoe to xox 1.5 8.5 1.5 5.5 t phz t plz output disenable time xoe to xox 1.5 8.5 1.5 5.0 t su setup time high or low, xdx to xclk 2.0 2.0 t h hold time high or low, xdx to xclk 1.5 1.5 t w xclk pulse width (4) high 7.0 5.0 t sk(o) output skew (5) 0.5 0.5 notes: 1. propagation delays and enable/disable times are with v cc = 3.3v 0.3v, normal range. for v cc = 2.7v, extended range, all propagation delays and enable/disable times should be degraded by 20%. 2. see test circuit and wave forms. 3. minimum limits are guaranteed but not tested on propagation delays. 4. this parameter is guaranteed but not production tested. 5. skew between any two outputs, of the same package, switching in the same direction. this parameter is guaranteed by design.
5 ps8503a 10/06/04 PI74LPT374 fast cmos 3.3v octal d flip-flop packaging mechanical: 20-pin qsop (q) packaging mechanical: 20-pin soic (s) seating plane .050 bsc 1 20 0-8? .2914 .2992 x.xx x.xx denotes controlling dimensions in millimeters 7.40 7.60 .496 .511 12.60 12.99 1.27 .0926 .1043 2.35 2.65 .394 .419 10.00 10.65 .0040 .0118 0.10 0.30 .013 .020 0.33 0.51 .010 .029 0.254 0.737 .0091 .0125 0.23 0.32 0.41 1.27 .016 .050 x 45? .020 .030 0.508 0.762 ref .337 .344 .053 .069 .004 .010 seating plane .025 bsc .007 .010 .228 .244 .150 .157 1 20 .016 .050 x.xx x.xx denotes dimensions in millimeters 0.635 8.56 8.74 1.35 1.75 5.79 6.19 0.41 1.27 0.101 0.254 .008 .012 0.203 0.305 3.81 3.99 0.178 0.254 .058 1.47 .015 x 45? 0.38 ref detail a detail a .008 0.20 min. guage plane .010 0.254 .041 1.04 ref .016 .035 0.41 0.89 0?-6? .008 .013 0.20 0.33
6 ps8503a 10/06/04 PI74LPT374 fast cmos 3.3v octal d flip-flop pericom semiconductor corporation ? 1-800-435-2336 ? www.pericom.com ordering information ordering code package code speed grade description PI74LPT374l l blank 20-pin 173-mil wide plastic tssop pi74lpt 374cq q c 20-pin 150-mil wide plastic qsop PI74LPT374cs s c 20-pin 300-mil wide plastic soic PI74LPT374cl l c 20-pin 173-mil wide plastic tssop notes: 1. thermal characteristics can be found on the company web site at www .pericom.com/packaging/ packaging mechanical: 20-pin tssop (l) .252 .260 .047 1.20 .002 .006 seating plane .0256 bsc .018 .030 .004 .008 .238 .269 1 20 .169 .177 x.xx x.xx denotes controlling dimensions in millimeters 0.05 0.15 6.1 6.7 0.45 0.75 0.09 0.20 4.3 4.5 6.4 6.6 0.65 0.19 0.30 .007 .012 max
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