1 ps2068f 11/10/08 product description the pi74lpt16245 is a 16-bit bidirectional transceiver designed for asynchronous two-way communication between data buses. the direction control input pin (xdir) determines the direction of data ow through the bidirectional transceiver. the direction and output enable controls are designed to operate this device as either two independent 8-bit transceivers or one 16-bit transceiver. the output enable (oe) input, when high, disables both a and b ports by placing them in high z condition. the pi74lpt16245 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. pi74lpt16245 fast cmos 3.3v 16-bit bidirectional transceiver product 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 (24 ma 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) logic block diagram 1 b 0 1 a 0 1 oe 1 dir 1 b 1 1 a 1 1 b 2 1 a 2 1 b 3 1 a 3 1 b 4 1 a 4 1 b 5 1 a 5 1 b 6 1 a 6 1 b 7 1 a 7 2 b 0 2 a 0 2 o e 2 dir 2 b 1 2 a 1 2 b 2 2 a 2 2 b 3 2 a 3 2 b 4 2 a 4 2 b 5 2 a 5 2 b 6 2 a 6 2 b 7 2 a 7 08-0291
pi74lpt16245 3.3v 16-bit bidirectional transceiver 2 ps2068f 11/10/08 product pin con guration 1 dir 1 1 b 0 2 1 b 1 3 gnd 4 1 b 2 5 1 b 3 6 v cc 7 1 b 4 8 1 b 5 9 gnd 10 1 b 6 11 1 b 7 12 2 b 0 13 2 b 1 14 gnd 15 2 b 2 16 2 b 3 17 v cc 18 2 b 4 19 2 b 5 20 gnd 21 2 b 6 22 2 b 7 23 2 dir 24 1 oe48 1 a 0 47 1 a 1 46 gnd45 1 a 2 44 1 a 3 43 v cc 42 1 a 4 41 1 a 5 40 gnd39 1 a 6 38 1 a 7 37 2 a 0 36 2 a 1 35 gnd34 2 a 2 33 2 a 3 32 v cc 31 2 a 4 30 2 a 5 29 gnd28 2 a 6 27 2 a 7 26 2 oe25 48-pin v48 a48 product pin description pin name description xoe 3-state output enable inputs (active low) xdir direction control input xax side a inputs or 3-state inputs xyx side b outputs or 3-state outputs gnd ground v cc power truth table (1) inputs outputs x oe x dir l l bus b data to bus a l h bus a data to bus b 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 maximum ratings may cause permanent dam age to the de- vice. this is a stress rating only and functional op- er a tion of the device at these or any other con di tions above those indicated in the op er a tion al sec tions of this speci t cation is not implied. exposure to ab so lute maximum rating conditions for ex tend ed periods may af- fect reliability. storage temperature ............................................................. ?55c to +125c ambient temperature with power applied ............................ ?40c to +85c supply voltage to ground potential (inputs & vcc 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
pi74lpt16245 3.3v 16-bit bidirectional transceiver 3 ps2068f 11/10/08 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 4.5 6 pf c out output capacitance v out = 0v 5.5 8 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 (input and i/o pins) guaranteed logic low level ?0.5 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 (3-state output pins) v cc = max. v out = 5.5v 1 i ozl 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 il 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 v cc -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 -60 ?85 ?240 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 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. 08-0291
pi74lpt16245 3.3v 16-bit bidirectional transceiver 4 ps2068f 11/10/08 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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 pi74lpt16245 3.3v 16-bit bidirectional transceiver 5 ps2068f 11/10/08 switching characteristics over operating range (1) parameters description conditions (2) lpt16245 lpt16245a lpt16245c units com. com. com. min (3) max. min (3) max. min (3) max. t plh t phl propagation delay x a x to x b x c l = 50pf r l = 500 1.5 5.2 1.5 4.6 1.5 4.1 ns t pzh t pzl output enable time xoe to xbx 1.5 7.2 1.5 6.2 1.5 5.8 t phz t plz output disable time (4) xoe to xbx 1.5 7.2 1.5 5.0 1.5 4.8 t pzh t pzl output enable time xdir to a or b 1.5 7.2 1.5 6.2 1.5 5.8 t phz t plz output disabletime xdir to a or b (4) 1.5 7.2 1.5 5.0 1.5 4.8 t sk (o) output skew (5) 0.5 0.5 0.5 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. 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 guar an teed by design. 1 .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
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 pi74lpt16245 3.3v 16-bit bidirectional transceiver 6 ps2068f 11/10/08 pericom semiconductor corporation ? 1-800-435-2336 ? www.pericom.com ordering information ordering code package code description pi74lpt16245ae a pb-free & green, 48-pin 173 mil wide plastic tssop pi74lpt16245aae a pb-free & green, 48-pin 173 mil wide plastic tssop PI74LPT16245VE v pb-free & green, 48-pin 300 mil wide plastic ssop pi74lpt16245cae a pb-free & green, 48-pin 173 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 1 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
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