1 ps2032d 05/17/99 product description pericom semiconductors pi74fct series of logic circuits are produced using the companys advanced 0.6 micron cmos technology, achieving industry leading speed grades. the PI74FCT16245T, pi74fct162245t, and pi74fct162h245t are 16-bit bidirectional transceivers designed for asynchronous two-way communication between data buses. the direction control input pin (xdir) determines the direction of data flow through the bidirectional transceiver. the direction and ouput enable controls are designed to operate these devices 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 PI74FCT16245T output buffers are designed with a power- off disable allowing live insertion of boards when used as backplane drivers. the pi74fct162245t has 24ma 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 pi74fct162h245t has bus hold which retains the inputs last state whenever the input goes to high-impedance preventing floating inputs and eliminating the need for pull-up/down resistors . 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 logic block diagram product features common features ? PI74FCT16245T, pi74fct162245t and pi74fct162h245 are high-speed, low-power devices with high-current drive ?v cc = 5v 10% ? hysteresis on all inputs ? packages available: C 48-pin 240 mil wide plastic tssop (a48) C 48-pin 173 mil wide plastic tvsop (jedec tssop k48) C 48-pin 300 mil wide plastic ssop (v48) PI74FCT16245T features ? high output drive: i oh = C32ma; i ol = 64ma ? power off disable outputs permit live insertion ? typical v olp (output ground bounce) < 1.0v at v cc = 5v, t a = 25c pi74fct162245t features ? balanced output drivers: 24ma ? reduced system switching noise ? typical v olp (output ground bounce) < 0.6v at v cc = 5v, t a = 25c pi74fct162h245t features ? bus hold retains last active bus state during three-state ? eliminates the need for external pull-up resistors PI74FCT16245T pi74fct162245t pi74fct162h245t fast cmos 16-bit bidirectional transceivers 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 oe 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
PI74FCT16245T/162245t/162h245t fast cmos 16-bit bidirectional tranceivers 2 ps2032d 05/17/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 product pin description pin name description xoe 3-state enable inputs (active low) xdir direction control input xax side a inputs or 3-state outputs (1) xbx side b inputs or 3-state outputs (1) gnd ground v cc power inputs (1) xoe xdir outputs (1) l l bus b data to bus a l h bus a data to bus b h x high z state truth table note: 1. h = high voltage level, x = dont care, l = low voltage level, z = high impedance product pin configuration note: 1. for the pi74fct162h245t, these pins have bus hold. all other pins are standard, outputs, or i/os. 48-pin v48 a48 k48
PI74FCT16245T/162245t/162h245t fast cmos 16-bit bidirectional tranceivers 3 ps2032d 05/17/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 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 C1 a i il input low current standard i/o, v cc = min. v in = gnd C1 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 C50 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 C1 a v ik clamp diode voltage v cc = min., i in = C18ma C0.7 C1.2 v i os short circuit current v cc = max. (3) , v out = gnd C80 C140 C200 ma i o output drive current v cc = max. (3) , v out = 2.5v C50 C180 ma v h input hysteresis 100 mv storage temperature ........................................................... C65c to +150c ambient temperature with power applied .......................... C40c to +85c supply voltage to ground potential (inputs & v cc 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 ............................................................................. 120ma 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 condi- tions 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 v cc = 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. maximum ratings (above which the useful life may be impaired. for user guidelines, not tested.) dc electrical characteristics (over the operating range, t a = C40c to +85c, v cc = 5.0v 10%)
PI74FCT16245T/162245t/162h245t fast cmos 16-bit bidirectional tranceivers 4 ps2032d 05/17/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 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 = C3.0ma 2.5 3.5 v i oh = C15.0ma 2.4 3.5 i oh = C32.0ma 2.0 3.0 v ol output low voltage v cc = min., v in = v ih or v il i ol = 64ma 0.2 0.55 v i off power down disable v cc = 0v, v in or v out 4.5v 100 a 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 = C24.0ma 2.4 3.3 v v ol output low voltage v cc = min., v in = v ih or v il i ol = 24ma 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) C60 C115 C150 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 PI74FCT16245T output drive characteristics (over the operating range) pi74fct162245t/162h245t output drive characteristics (over the operating range)
PI74FCT16245T/162245t/162h245t fast cmos 16-bit bidirectional tranceivers 5 ps2032d 05/17/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 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 or v cc 0.1 500 a supply current d i cc supply current per v cc = max. v in = 3.4v (3) 0.5 1.5 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 x oe = xdir = gnd one bit toggling 50% duty cycle i c total power supply v cc = max., v in = v cc 0.7 2.5 (5) ma current (6) outputs open v in = gnd f i = 10 mh z 50% duty cycle x oe = xdir = gnd one bit toggling v in = 3.4v 0.9 3.3 (5) v in = gnd v cc = max., v in = v cc 2.5 5.5 (5) outputs open v in = gnd f i = 2.5 mh z 50% duty cycle x oe = xdir = gnd 16 bits toggling v in = 3.4v 6.5 17.5 (5) v in = gnd 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.
PI74FCT16245T/162245t/162h245t fast cmos 16-bit bidirectional tranceivers 6 ps2032d 05/17/99 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 notes: 1. see test circuit and waveforms. 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 16245t 16245at 16245ct 16245dt 16245et com. com. com. com. com. parameters description conditions (1) min. max. min. max. min. max. min. max. min. max. units t plh propagation delay (2) c l = 50pf 1.5 7.0 1.5 4.6 1.5 4.1 1.5 3.8 1.5 3.2 ns t phl a to b, b to ar l = 500 w t pzh output enable time 1.5 9.5 1.5 6.2 1.5 5.8 1.5 5.0 1.5 4.4 ns t pzl x oe to a or b t phz output disable time (3) 1.5 7.5 1.5 5.0 1.5 4.8 1.5 4.3 1.5 4.0 ns t plz x oe to a or b t pzh output enable time 1.5 9.5 1.5 6.2 1.5 5.8 1.5 5.0 1.5 4.8 ns t pzl x dir to a or b (3) t phz output disable time 1.5 7.5 1.5 5.0 1.5 4.8 1.5 4.3 1.5 4.0 ns t plz x dir to a or b (3) t sk (o) output skew (4) 0.5 0.5 0.5 0.5 0.5 ns 162245t 162245at 162245ct 162245dt 162245et com. com. com. com. com. parameters description conditions (1) min. max. min. max. min. max. min. max. min. max. units t plh propagation delay (2) c l = 50pf 1.5 7.0 1.5 4.6 1.5 4.1 1.5 3.8 1.5 3.2 ns t phl a to b, b to ar l = 500 w t pzh output enable time 1.5 9.5 1.5 6.2 1.5 5.8 1.5 5.0 1.5 4.4 ns t pzl x oe to a or b t phz output disable time (3) 1.5 7.5 1.5 5.0 1.5 4.8 1.5 4.3 1.5 4.0 ns t plz x oe to a or b t pzh output enable time 1.5 9.5 1.5 6.2 1.5 5.8 1.5 5.0 1.5 4.8 ns t pzl x dir to a or b (3) t phz output disable time 1.5 7.5 1.5 5.0 1.5 4.8 1.5 4.3 1.5 4.0 ns t plz x dir to a or b (3) t sk (o) output skew (4) 0.5 0.5 0.5 0.5 0.5 ns 162245t 162245at 162245ct 162245dt 162245et com. com. com. com. com. parameters description conditions (1) min. max. min. max. min. max. min. max. min. max. units t plh propagation delay (2) c l = 50pf 1.5 7.0 1.5 4.6 1.5 4.1 1.5 3.8 1.5 3.2 ns t phl a to b, b to ar l = 500 w t pzh output enable time 1.5 9.5 1.5 6.2 1.5 5.8 1.5 5.0 1.5 4.4 ns t pzl x oe to a or b t phz output disable time (3) 1.5 7.5 1.5 5.0 1.5 4.8 1.5 4.3 1.5 4.0 ns t plz x oe to a or b t pzh output enable time 1.5 9.5 1.5 6.2 1.5 5.8 1.5 5.0 1.5 4.8 ns t pzl x dir to a or b (3) t phz output disable time 1.5 7.5 1.5 5.0 1.5 4.8 1.5 4.3 1.5 4.0 ns t plz x dir to a or b (3) t sk (o) output skew (4) 0.5 0.5 0.5 0.5 0.5 ns PI74FCT16245T switching characteristics over operating range pi74fct162245t switching characteristics over operating range pi74fct162h245t switching characteristics over operating range
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