1 ps2067a 01/15/97 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI74LPT16244 3.3v, 16-bit buffer/line driver product description: pericom semiconductor?s pi74lpt series of logic circuits are pro- duced in the company?s advanced 0.6 micron cmos technology, achieving industry leading speed grades. the 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 reflections 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. logic block diagram 1 oe 1 a 01 y 0 1 a 11 y 1 1 a 21 y 2 1 a 3 1 y 3 3 oe 3 a 03 y 0 3 a 13 y 1 3 a 23 y 2 3 a 33 y 3 2 oe 2 a 02 y 0 2 a 12 y 1 2 a 22 y 2 2 a 3 2 y 3 4 oe 4 a 04 y 0 4 a 14 y 1 4 a 24 y 2 4 a 34 y 3 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 ? packages available: ? 48-pin 240 mil wide thin plastic tssop (a) ? 48-pin 300 mil wide plastic ssop (v)
2 ps2067a 01/15/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI74LPT16244 3.3v, 16-bit buffer/line driver product pin configuration 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 inputs (1) outputs (1) x oe xax xyx ll l lh h hx z truth table note: 1. h = high voltage level, x = don't care, l = low voltage level, z = high impedance 48-pin v48 a48 note: 1. this parameter is determined by device characterization but is not production tested. 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 pf 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 1 oe 1 y 0 1 y 1 gnd 1 y 2 1 y 3 v cc 2 y 0 2 y 1 gnd 2 y 2 2 y 3 3 y 0 3 y 1 gnd 3 y 2 3 y 3 v cc 4 y 0 4 y 1 gnd 4 y 2 4 y 3 4 oe 48-pin v48 a48 2 oe 1 a 0 1 a 1 gnd 1 a 2 1 a 3 v cc 2 a 0 2 a 1 gnd 2 a 2 2 a 3 3 a 0 3 a 1 gnd 3 a 2 3 a 3 v cc 4 a 0 4 a 1 gnd 4 a 2 4 a 3 3 oe
3 ps2067a 01/15/97 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI74LPT16244 3.3v, 16-bit buffer/line driver 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 v il input low voltage guaranteed logic low level ?0.5 ? 0.8 v (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 ??1a i il input low current (input pins) v cc = max. v in = gnd ? ? 1 a input low current (i/o pins) v cc = max. v in = gnd ? ? 1 a i ozh high impedance output current v cc = max. v out = 5.5v ? ? 1 a i ozl (3-state output pins) v cc = max. v out = gnd ? ? 1 a v ik clamp diode voltage v cc = min., i in = ?18 ma ? ?0.7 ?1.2 v i odh 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 ma v oh output high voltage v cc = min. i oh = ?0.1 ma vcc-0.2 ? ? v v in = v ih or v il i oh = ?3 m a 2.4 3.0 ? v v cc = 3.0v, i oh = ?8 ma 2.4 (5) 3.0 ? v v in = v ih or v il i oh = ?24 ma 2.0 ? ? v ol output low voltage v cc = min. i ol = 0.1 ma ? ? 0.2 v v in = v ih or v il i ol = 16 m a ? 0.2 0.4 v i ol = 24 m a ? 0.3 0.5 v 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 v h input hysteresis ? 150 ? mv 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 damage to the de- vice. this is a stress rating only and functional opera- tion of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. notes: 1. for max. or min. conditions, use appropriate value specified 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. storage temperature ............................................................ C55c to +125c ambient temperature with power applied ........................... C40c to +85c supply voltage to ground potential (inputs & vcc 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
4 ps2067a 01/15/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI74LPT16244 3.3v, 16-bit buffer/line driver 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 d i cc quiescent power supply current v cc = max. v in = v cc C 0.6v (3) 2.0 30 a ttl inputs high i ccd dynamic power supply (4) v cc = max., v in = v cc 50 75 a/ outputs open v in = gnd mhz x oe = gnd one bit toggling 50% duty cycle i c total power supply v cc = max., v in = v cc C 0.6v 0.5 0.8 ma current (6) outputs open v in = gnd f i = 10 mh z 50% duty cycle x oe = gnd one bit toggling v cc = max., v in = v cc C 0.6v 2.0 3.3 (5) outputs open v in = gnd f i = 2.5 mh z 50% duty cycle x oe = gnd 16 bits toggling notes: 1. formax. or min. conditions, use appropriate value specified 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 + d 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 ) d 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.
5 ps2067a 01/15/97 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 PI74LPT16244 3.3v, 16-bit buffer/line driver switching characteristics over operating range (1) lpt16244 lpt16244a lpt16244c com. com. com. parameters description conditions (2) min (3) max min (3) max min (3) max unit t plh propagation delay c l = 50 pf 1.5 5.2 1.5 4.8 1.5 4.1 ns t phl x a x to x y x r l = 500 w t pzh output enable time 1.5 7.0 1.5 6.2 1.5 5.8 ns t pzl xoe to xyx t phz output disable time (4) 1.5 7.0 1.5 5.6 1.5 5.2 ns t plz xoe to xyx t sk (o) output skew (5) 0.5 0.5 0.5 ns 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 guaranteed by design. pericom semiconductor corporation 2380 bering drive ? san jose, ca 95131 ? 1-800-435-2336 ? fax (408) 435-1100 ? http://www.pericom.com
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