pi74fct16827t/162827/162h827t 20-bit buffers 1 ps2041a 03/11/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 logic block diagram pi74fct16827t pi74fct162827t pi74fct162h827t fast cmos 20-bit buffers product description pericom semiconductor?s pi74fct series of logic circuits are pro- duced in the company?s advanced 0.6 micron cmos technology, achieving industry leading speed grades. the pi74fct16827t, pi74fct162827t, and pi74fct162h827t are 20-bit wide bus drivers designed to provide buffering and high- performance bus interfacing for wide data/address paths or buses with parity. two pair of nanded output enable controls allow the devices to be operated as two 10-bit buffers or as one 20-bit buffer. signal pins are arranged in a flow-through organization for ease of layout and hysteresis is designed into all inputs to improve noise margin. the pi74fct16827t output buffers are designed with a power-off disable function allowing ?live insertion? of boards when the devices are used as backplane drives. the pi74fct162827t has 24 ma balanced output drivers. it is designed with current limiting resistors at its outputs to control the output edge rate resulting in lower ground bounce and undershoot. this eliminates the need for external terminating resistors for most interface applications. the pi74fct162h827t has ?bus hold? which retains the input's last state whenever the input goes to high-impedance preventing ?floating? inputs and eliminating the need for pull-up/down resistors. product features common features: ? pi74fct16827t, pi74fct162827t, and pi74fct2h827t are high-speed, low power devices with high current drive ?v cc = 5v 10% ? hysteresis on all inputs ? packages available: ? 56-pin 240 mil wide plastic tssop (a) ? 56-pin 300 mil wide plastic ssop (v) pi74fct16827t features: ? high output drive: i oh = ?32 ma; i ol = 64 ma ? power off disable outputs permit "live insertion" ? typical v olp (output ground bounce) < 1.0v at v cc = 5v, t a = 25c pi74fct162827t features: ? balanced output drivers: 24 ma ? reduced system switching noise ? typical v olp (output ground bounce) < 0.6v at v cc = 5v, t a = 25c pi74fct162h827t features: ? bus hold retains last active bus state during 3-state ? eliminates the need for external pull-up resistors 1 oe 1 1 oe 2 1 a 1 1 y 1 to 9 other channels 2 oe 1 2 oe 2 2 a 1 2 y 1 to 9 other channels
pi74fct16827t/162827/162h827t 20-bit buffers 2 ps2041a 03/11/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pin name description xoex output enable inputs (active low) xax (1) data inputs xyx 3-state outputs note : 1. for the pi74fct162h827t, these pins have ?bus hold.? all other pins are standard, outputs, or i/os. product pin description product pin configuration inputs outputs xoe 1 xoe 2 xax xyx lll l llh h hxx z xhx z truth table (1) 1. h = high voltage level l = low voltage level x = don't care z = high impedance 1 oe 1 1 1 y 1 2 1 y 2 3 gnd 4 1 y 3 5 1 y 4 6 v cc 7 1 y 5 8 1 y 6 9 1 y 7 10 gnd 11 1 y 8 12 1 y 9 13 1 y 10 14 2 y 1 15 2 y 2 16 2 y 3 17 gnd 18 2 y 4 19 2 y 5 20 2 y 6 21 v cc 22 2 y 7 23 2 y 8 24 1 oe 2 56 1 a 1 55 1 a 2 54 gnd 53 1 a 3 52 1 a 4 51 v cc 50 1 a 5 49 1 a 6 48 1 a 7 47 gnd 46 1 a 8 45 1 a 9 44 1 a 10 43 2 a 1 42 2 a 2 41 2 a 3 40 gnd 39 2 a 4 38 2 a 5 37 2 a 6 36 v cc 35 2 a 7 34 2 a 8 33 gnd 25 2 y 9 26 2 y 10 27 2 oe 1 28 gnd 32 2 a 9 31 2 a 10 30 2 oe 2 29 56-pin v56 a56
pi74fct16827t/162827/162h827t 20-bit buffers 3 ps2041a 03/11/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 dc electrical characteristics (over the operating range, t a = ?40c to +85c, v cc = 5.0v 10%) parameters description test conditions (1) min. typ (2) max. units v ih input high voltage guaranteed logic high level 2.0 v v il input low voltage guaranteed logic low level 0.8 v i ih input high current standard input, v cc = max. v in = v cc 1a i ih input high current standard i/o, v cc = max. v in = v cc 1a i ih input high current bus hold input (4) , v cc = max. v in = v cc 100 a i ih input high current bus hold i/o (4) , v cc = max. v in = v cc 100 a i il input low current standard input, v cc = min. v in = gnd ?1 a i il input low current standard i/o, v cc = min. v in = gnd ?1 a i il input low current bus hold input (4) , v cc = min. v in = gnd 100 a i il input low current bus hold i/o (4) , v cc = min. v in = gnd 100 a i bhh bus hold bus hold input (4) , v cc = min. v in = 2.0v ?50 a i bhl sustain current v in = 0.8v +50 i ozh (5) high-impedance v cc = max. v out = 2.7v 1 a i ozl (5) output current v cc = max. v out = 0.5v ?1 a (3-s tate o utputs ) v ik clamp diode voltage v cc = min., i in = ?18 ma ?0.7 ?1.2 v i os short circuit current v cc = max. (3) , v out = gnd ?80 ?140 ?200 ma i o output drive current v cc = max. (3) , v out = 2.5v ?50 ?180 ma v h input hysteresis 100 mv maximum ratings (above which the useful life may be impaired. for user guidelines, not 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 ..................................................................................... 120 ma power dissipation .......................................................................................... 1.0w 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 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 = 5.0v, +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. pins with bus hold are identified in the pin description. 5. this specification does not apply to bi-directional functionalities with bus hold.
pi74fct16827t/162827/162h827t 20-bit buffers 4 ps2041a 03/11/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74fct16827t output drive characteristics (over the operating range) parameters description test conditions (1) min. typ (2) max. units v oh output high voltage v cc = min., v in = v ih or v il i oh = ?3.0 ma 2.5 3.5 v i oh = ?15.0 ma 2.4 3.5 i oh = ?32.0 ma 2.0 3.0 v ol output low voltage v cc = min., v in = v ih or v il i ol = 64 ma 0.2 0.55 v i off power down disable v cc = 0v, v in or v out 4.5v ? ? 100 a pi74fct162827t/162h827t output drive characteristics (over the operating range) parameters description test conditions (1) min. typ (2) max. units v oh output high voltage v cc = min., v in = v ih or v il i oh = ?24.0 ma 2.4 3.3 v v ol output low voltage v cc = min., v in = v ih or v il i ol = 24 ma 0.3 0.55 v i odl output low current v cc = 5v, v in = v ih or v il , v out = 1.5v (3) 60 115 150 ma i odh output high current v cc = 5v, v in = v ih or v il , v out = 1.5v (3) ?60 ?115 ?150 ma 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 = 5.0v, +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 determined by device characterization but is not production tested. capacitance (t a = 25c, f = 1 mhz) parameters (4) 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
pi74fct16827t/162827/162h827t 20-bit buffers 5 ps2041a 03/11/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 power supply characteristics parameters description test conditions (1) min. typ (2) max. units i cc quiescent power v cc = max. v in = gnd 0.1 500 a supply current or v cc d i cc supply current per v cc = max. v in = 3.4v (3) 0.5 2.5 ma input @ ttl high i ccd supply current per v cc = max., v in = v cc 60 100 a/ input per mhz (4) outputs open v in = gnd mhz oe 1 = oe 2 = gnd one input toggling 50% duty cycle i c total power supply v cc = max., v in = v cc 0.6 1.5 (5) ma current (6) outputs open v in = gnd f cp = 10 mh z 50% duty cycle v in = 3.4v 0.9 2.3 (5) oe 1 = oe 2 = gnd v in = gnd f i = 5 mh z one bit toggling v cc = max., v in = v cc 3.0 5.5 (5) outputs open v in = gnd f cp = 10 mh z 50% duty cycle v in = 3.4 8.0 20.5 (5) oe 1 = oe 2 = gnd v in = gnd eight bits toggling f i = 2.5 mh z 50% duty cycle notes: 1. for max. or min. conditions, use appropriate value specified under electrical characteristics for the applicable device. 2. typical values are at vcc = 5.0v, +25c ambient. 3. per ttl driven input (v in = 3.4v); 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 d i cc = power supply current for a ttl high input (v in = 3.4v). 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). f i = input frequency n i = number of inputs at f i all currents are in milliamps and all frequencies are in megahertz.
pi74fct16827t/162827/162h827t 20-bit buffers 6 ps2041a 03/11/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 16827at 16827bt 16827ct 16827dt 16827et com. com. com. com. com. parameters description conditions (1) min max min max min max min max min max unit t plh propagation delay c l = 50 pf 1.5 8.0 1.5 5.0 1.5 4.4 1.5 3.8 1.5 3.2 ns t phl x a x to x y x r l = 500 w c l = 300 pf (3) 1.5 15.0 1.5 13.0 1.5 10.0 1.5 7.5 1.5 7.0 ns r l = 500 w t pzh output enable time c l = 50 pf 1.5 12.0 1.5 8.0 1.5 7.0 1.5 5.0 1.5 4.8 ns t pzl x oe x to x y x r l = 500 w c l = 300 pf (3) 1.5 23.0 1.5 15.0 1.5 14.0 1.5 9.0 1.5 9.0 ns r l = 500 w t phz output disable time (3) c l = 5 pf (3) 1.5 9.0 1.5 6.0 1.5 5.7 1.5 4.3 1.5 4.0 ns t plz oe n to y n r l = 500 w c l = 50 pf 1.5 10.0 1.5 7.0 1.5 6.0 1.5 4.3 1.5 4.0 ns r l = 500 w t sk ( o ) output skew (4) ? 0.5 ? 0.5 ? 0.5 ? 0.5 ? 0.5 ns pi74fct16827t switching characteristics over operating range 162827at 162827bt 162827ct 162827dt 162827et com. com. com. com. com. parameters description conditions (1) min max min max min max min max min max unit t plh propagation delay c l = 50 pf 1.5 8.0 1.5 5.0 1.5 4.4 1.5 3.8 1.5 3.2 ns t phl x a x to x y x r l = 500 w c l = 300 pf (3) 1.5 15.0 1.5 13.0 1.5 10.0 1.5 7.5 1.5 7.0 ns r l = 500 w t pzh output enable time c l = 50 pf 1.5 12.0 1.5 8.0 1.5 7.0 1.5 5.0 1.5 4.8 ns t pzl x oe x to x y x r l = 500 w c l = 300 pf (3) 1.5 23.0 1.5 15.0 1.5 14.0 1.5 9.0 1.5 9.0 ns r l = 500 w t phz output disable time (3) c l = 5 pf (3) 1.5 9.0 1.5 6.0 1.5 5.7 1.5 4.3 1.5 4.0 ns t plz oe n to y n r l = 500 w c l = 50 pf 1.5 10.0 1.5 7.0 1.5 6.0 1.5 4.3 1.5 4.0 ns r l = 500 w t sk ( o ) output skew (4) ? 0.5 ? 0.5 ? 0.5 ? 0.5 ? 0.5 ns pi74fct162827t switching characteristics over operating range notes: 1. see test circuit and wave forms. 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 guaranteed by design.
pi74fct16827t/162827/162h827t 20-bit buffers 7 ps2041a 03/11/96 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 162h827at 162h827bt 162h827ct 162h827dt 162h827et com. com. com. com. com. parameters description conditions (1) min max min max min max min max min max unit t plh propagation delay c l = 50 pf 1.5 8.0 1.5 5.0 1.5 4.4 1.5 3.8 1.5 3.2 ns t phl x a x to x y x r l = 500 w c l = 300 pf (3) 1.5 15.0 1.5 13.0 1.5 10.0 1.5 7.5 1.5 7.0 ns r l = 500 w t pzh output enable time c l = 50 pf 1.5 12.0 1.5 8.0 1.5 7.0 1.5 5.0 1.5 4.8 ns t pzl x oe x to x y x r l = 500 w c l = 300 pf (3) 1.5 23.0 1.5 15.0 1.5 14.0 1.5 9.0 1.5 9.0 ns r l = 500 w t phz output disable time (3) c l = 5 pf (3) 1.5 9.0 1.5 6.0 1.5 5.7 1.5 4.3 1.5 4.0 ns t plz oe n to y n r l = 500 w c l = 50 pf 1.5 10.0 1.5 7.0 1.5 6.0 1.5 4.3 1.5 4.0 ns r l = 500 w t sk ( o ) output skew (4) ? 0.5 ? 0.5 ? 0.5 ? 0.5 ? 0.5 ns pi74fct162h827t switching characteristics over operating range notes: 1. see test circuit and wave forms. 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 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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