1 ps2067g 11/10/08 description pericom semiconductor?s pi74lpt16244 is a 16-bit buffer/line driver designed for driving high capacitive memory loads. with its balanced-drive characteristics, this high-speed, low power device provides lower ground bounce, transmission line matching of signals, fewer line re ections and lower emi and rfi effects. this makes it ideal for driving on-board buses and transmission lines. this device is designed with three-state controls to operate in a quad-nibble, dual-byte, or a single 16-bit word mode. the pi74lpt16244 can be driven from either 3.3v or 5.0v devices allowing this device to be used as a translator in a mixed 3.3/5.0v system. block diagram features ? compatible with lcx and lvt families of products ? supports 5v tolerant mixed signal mode operation ? input can be 3v or 5v ? output can be 3v or connected to 5v bus ? advanced low power cmos operation ? excellent output drive capability: balanced drives (24ma sink and source) ? pin compatible with industry standard double-density pinouts ? low ground bounce outputs ? hysteresis on all inputs ? industrial operating temperature range: ?40c to +85c ? multiple center pins and distributed vcc/gnd pins minimize switching noise ? packaging (pb-free & green available): ? 48-pin 240-mil wide thin plastic tssop (a) ? 48-pin 300-mil wide plastic ssop (v) pi74lpt16244 3.3v, 16-bit buffer/line driver 1 oe 1 a 0 1 1 y 0 3 oe 2 oe 4 oe 1 a 1 1 1 y 1 1 a 2 1 1 y 2 1 a 3 1 1 y 3 2 a 0 2 2 y 0 2 a 1 2 2 y 1 2 a 2 2 2 y 2 2 a 3 2 2 y 3 3 a 0 3 3 y 0 3 a 1 3 3 y 1 3 a 2 3 3 y 2 3 a 3 3 3 y 3 4 a 0 4 4 y 0 4 a 1 4 4 y 1 4 a 2 4 4 y 2 4 a 3 4 4 y 3 08-0291
2 ps2067g 11/10/08 pi74lpt16244 3.3v, 16-bit buffer/line driver product pin con guration product pin description pin name description xoe 3-state output enable inputs (active low) xax inputs xyx 3-state outputs gnd ground v cc power 1 2 3 4 5 6 7 8 9 48 10 47 11 46 12 45 13 44 14 43 15 42 16 41 17 40 18 39 19 38 20 37 21 36 22 35 23 34 24 33 32 31 30 29 28 27 26 25 1oe 1y0 1y1 gnd 1y2 1y3 vcc 2y0 2y1 gnd 2y2 2y3 3y0 3y1 gnd 3y2 3y3 vcc 4y0 4y1 gnd 4y2 4y3 4oe 2oe 1a0 1a1 gnd 1a2 1a3 vcc 2a0 2a1 gnd 2a2 2a3 3a0 3a1 gnd 3a2 3a3 vcc 4a0 4a1 gnd 4a2 4a3 3oe 48-pin a, v truth table inputs (1) outputs (1) x oe x a x xyx ll l lh h hx z notes: 1. h = high voltage level, x = don't care, l = low voltage level, z = high impedance maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) note: stresses greater than those listed under max i mum rat- ings may cause permanent damage to the de vice. this is a stress rating only and func tion al op er a tion of the device at these or any other conditions above those indicated in the operational sections of this speci t cation is not implied. exposure to absolute maximum rating conditions for ex- tended periods may affect reliability. storage temperature ............................................................ ?55c to +125c ambient temperature with power applied ........................... ?40c to +85c supply voltage to ground potential (inputs & v cc only) ..... ?0.5v to +7.0v supply voltage to ground potential (outputs & d/o only) .. ?0.5v to +7.0v dc input voltage .................................................................... ?0.5v to +7.0v dc output current .............................................................................. 120 ma power dissipation ................................................................................... 1.0w 08-0291
3 ps2067g 11/10/08 pi74lpt16244 3.3v, 16-bit buffer/line driver dc electrical characteristics (over the operating range, t a = ?40c 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 guaranteed logic low level ?0.5 0.8 (input and i/o pins) 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 = ?18 ma ?0.7 ?1.2 v i ohd output high current v cc = 3.3v, v in = v ih or v il , v o = 1.5v (3) ?36 ?60 ?110 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 = ?0.1 ma vcc-0.2 v i oh = ?3 ma 2.4 3.0 v cc = 3.0v, i oh = ?8 ma 2.4 (5) 3.0 v in = v ih or v il i oh = ?24 ma 2.0 v ol output low voltage v cc = min. v in = v ih or v il i ol = 0.1 ma 0.2 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 ?60 ?85 ?240 ma i off power down disable v cc = 0v, v in or v out 4.5v 100 a notes: 1. for max. or min. conditions, use appropriate value speci ed under electrical characteristics for the applicable device type. 2. typical values are at vcc = 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 ? 0.6v at rated current. notes: 1. this parameter is determined by device characterization but is not production tested. capacitance (t a = 25c, f = 1 mhz) parameters (1) de scrip tion test conditions typ max. units c in input capacitance v in = 0v 3 6 pf c out output capacitance v out = 0v 3 8 08-0291
4 ps2067g 11/10/08 pi74lpt16244 3.3v, 16-bit buffer/line driver power supply characteristics parameters de scrip tion 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 ? 0.6v (3) 500 i ccd dynamic power supply (4) v cc = max., outputs open x 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 x oe = gnd one bit toggling v in = v cc ? 0.6v v in = gnd 0.5 0.8 ma v cc = max., outputs open f i = 2.5 mh z 50% duty cycle x oe = gnd 16 bits toggling v in = v cc ? 0.6v v in = gnd 2.0 3.3 (5) notes: 1. formax. or min. conditions, use appropriate value speci ed under electrical characteristics for the applicable device. 2. typical values are at vcc = 3.3v, +25c ambient. 3. per ttl driven input; all other inputs at vcc 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 icc 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 cch 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 ccd = 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. 08-0291
5 ps2067g 11/10/08 pi74lpt16244 3.3v, 16-bit buffer/line driver notes: 1. propagation delays and enable/disable times are with vcc = 3.3v 0.3v, normal range. for vcc = 2.7v, extended range, all propagation delays and enable/disable times should be degraded by 20%. 2. minimum limits are guaranteed but not tested on propagation delays. 3. this parameter is guaranteed but not production tested. 4. skew between any two outputs, of the same package, switching in the same direction. this parameter is guar an teed by design. switching characteristics over operating range (1) parameters description conditions lpt16244 lpt16244a lpt16244c units com. com. com. min (2) max. min (2) max. min (2) max. t plh t phl propagation delay x a x to x y x c l = 50 pf r l = 500 1.5 5.2 1.5 4.8 1.5 4.1 ns t pzh t pzl output enable time xoe to xyx 1.5 7.0 1.5 6.2 1.5 5.8 t phz t plz output disable time (3) xoe to xyx 1.5 7.0 1.5 5.6 1.5 5.2 t sk (o) output skew (4) 0.5 0.5 0.5 packaging mechanical: 48-pin tssop (a) .236 .244 .488 .496 .002 .006 seating plane .007 .010 .0197 bsc .004 .008 .319 1 48 12.4 12.6 6.0 6.2 0.50 0.17 0.27 8.1 0.05 0.15 0.09 0.20 x.xx x.xx denotes dimensions in millimeters .018 .030 0.45 0.75 .047 1.20 max bsc document control no. pd - 1501 revision: g date: 03/09/05 note: 1. controlling dimensions in millimeters. 2. ref: jedec mo-153f/ed 3. dimension does not include mold ash, protrusions or gate burrs. mold ash, protru- sions and gate burrs shall not exceed 0.15mm per side. 4. dimension does not include interlead ash or protrusion. interlead ash or protrusion shall not exceed 0.25mm per side. description: 48-pin 240-mil wide tssop package code: a pericom semiconductor corporation 3545 n. 1st street, san jose, ca 95134 1-800-435-2335 ? www.pericom.com see note 3 see note 4 08-0291
6 ps2067g 11/10/08 pi74lpt16244 3.3v, 16-bit buffer/line driver pericom semiconductor corporation ? 1-800-435-2336 ? www.pericom.com ordering information ordering code package code description pi74lpt16244v v 48-pin 300 mil wide plastic ssop pi74lpt16244cv v 48-pin 300 mil wide plastic ssop pi74lpt16244ae a pb-free & green, 48-pin 240 mil wide plastic tssop PI74LPT16244AAE a pb-free & green, 48-pin 240 mil wide plastic tssop pi74lpt16244cae a pb-free & green, 48-pin 240 mil wide plastic tssop notes: ? thermal characteristics can be found on the company web site at www.pericom.com/packaging/ ? e = pb-free & green ? adding an x suf x = tape/reel packaging mechanical: 48-pin ssop (v) 0.20 0.51 1.01 0.25 0.381 0.635 .008 .008 .016 0-8? 0.20 0.40 .110 2.79 .010 gauge plane .02 .04 .015 .025 x 45 ? .025 bsc 0.635 .291 .299 x.xx x.xx denotes dimensions in millimeters 7.39 7.59 .395 .420 10.03 10.67 .620 .630 15.75 16.00 .008 .0135 0.20 0.34 1 48 nom. max description: 48-pin, 300-mil wide, ssop package code: v document control no. pd - 1401 revision: e date: 03/09/05 notes: 1) controlling dimensions in inches. 2) ref: jedec mo-118b/aa pericom semiconductor corporation 3545 n. 1st street, san jose, ca 95134 1-800-435-2335 ? www.pericom.com 08-0291
|
