1 ps2061b 01/18/99 logic block diagram product pin configuration product pin description pin name description oe a , oe b 3-state output enable inputs (active low) d7-d0 inputs o7-o0 outputs gnd ground v cc power inputs outputs oe a oe b d x o x llll llhh hhx z truth table (1) notes: 1. h = high voltage level, x = don?t care, l = low voltage level, z = high impedance 20-pin l20 q20 r20 s20 product description pericom semiconductor?s pi74lpt series of logic circuits are produced using the company?s advanced 0.6 micron cmos technology, achieving industry leading speed grades. the pi74lpt541 is an 8-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 offers a flow-through organization for ease of board layout. the pi74lpt541, which can be driven from either 3.3v or 5.0v devices, can be used as a translator in mixed 3.3/5.0v systems. product features compatible with lcx? and lvt? families of products supports 5v i/o 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) low ground bounce outputs hysteresis on all inputs industrial operating temperature range: ?40c to +85c packages available: ? 20-pin 173 mil wide plastic tssop (l) ? 20-pin 150 mil wide plastic qsop (q) ? 20-pin 150 mil wide plastic tqsop (r) ? 20-pin 300 mil wide plastic soic (s) oe a d 0 o 0 oe b d 1 o 1 d 2 o 2 d 3 o 3 d 4 o 4 d 5 o 5 d 6 o 6 d 7 o 7 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 vcc oe b o0 o1 o2 o3 o4 o5 o6 o7 oe a d0 d1 d2 d3 d4 d5 d6 d7 gnd 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901212345678901234567890123456789012 12345678901 2 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 fast cmos 3.3v 8-bit buffer/line driver pi74lpt541
pi74lpt541 3.3v 8-bit buffer/line driver 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 2 ps2061b 01/18/99 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 device. this is a stress rating only and functional operation of the device at these or any other condi- tions above those indicated in the operational sec- tions of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability. 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 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 = ?18ma ? ?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 = ?0.1ma vcc-0.2 ? ? v v in = v ih or v il i oh = ?3ma 2.4 3.0 ? v v cc = 3.0v, i oh = ?8ma 2.4 (5) 3.0 ? v v in = v ih or v il i oh = ?24ma 2.0 ? ? v ol output low voltage v cc = min. i ol = 0.1ma ? ? 0.2 v v in = v ih or v il i ol = 16ma ? 0.2 0.4 v i ol = 24ma ? 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 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 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. note: 1. this parameter is determined by device characterization but is not production tested. storage temperature ............................................................ ?65c to +150c 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 ............................................................................... 120ma power dissipation .................................................................................... 1.0w
pi74lpt541 3.3v 8-bit buffer/line driver 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 3 ps2061b 01/18/99 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 ? 0.6v (3) ? 100 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 oe x = gnd one bit toggling 50% duty cycle i c total power supply v cc = max., v in = v cc ? 0.6v 0.6 2.3 ma current (6) outputs open v in = gnd f i = 10 mh z 50% duty cycle oe x = gnd one bit toggling v cc = max., v in = v cc ? 0.6v 2.1 4.7 (5) outputs open v in = gnd f i = 2.5 mh z 50% duty cycle oe x = gnd 8 bits toggling notes: 1. for max. 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.
pi74lpt541 3.3v 8-bit buffer/line driver 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 4 ps2061b 01/18/99 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 waveforms. 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. switching characteristics over operating range (1) lpt541 lpt541a lpt541c com. com. com. parameters description conditions (2) min. (3) max. min. (3) max. min. (3) max. units t plh propagation delay c l = 50pf 1.5 6.0 1.5 4.8 1.5 4.1 t phl d x to o x r l = 500 w t pzh output enable time 1.5 9.5 1.5 6.2 1.5 5.8 ns t pzl oex to ox t phz output disable time (4) 1.5 6.5 1.5 5.6 1.5 5.2 t plz oex to ox t sk (o) output skew (5) 0.5 0.5 0.5 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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