pi74lpt16646 3.3v 16-bit registered transceivers 1 ps2073a 01/16/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 logic block diagram d 1 clkab c 1 clkba 1 sba 1 dir 1 oe 1 sab d c a reg b reg 1 b 0 1 a 0 to 7 other channels d 2 clkab c 2 clkba 2 sba 2 dir 2 oe 2 sab d c a reg b reg 2 b 0 2 a 0 to 7 other channels 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 pi74lpt16646 fast cmos 3.3v 16-bit registered transceivers 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: ? 56-pin 240 mil wide plastic tssop (a) ? 56-pin 300 mil wide plastic ssop (v) 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 pi74lpt16646 is a 16-bit registered transceiver organized as two independent 8-bit bus transceivers designed with 3-state d-type flip-flops and control circuitry arranged for multiplexed transmission of data directly from the data bus or from the internal storage registers. each 8-bit transceiver utilizes the enable control (xoe) and direction pins (xdir) to control the transceiver functions. the select (xsab and xsba) control pins are used to select either real-time or stored data transfer. the circuitry used for select control will eliminate the typical decoding glitch that occurs in a multiplexer during the transition between real-time and stored data. a low input level selects real-time data and a high selects stored data. the pi74lpt16646 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.
pi74lpt16646 3.3v 16-bit registered transceivers 2 ps2073a 01/16/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 product pin description pin name description xoe, xdir output enable inputs (active low) xclkab, xclkba clock pulse inputs xsab, xsba output data source select inputs xax data register a inputs data register b outputs xbx data register b inputs data register a outputs gnd ground v cc power product pin configuration inputs data i/o (1) function xoe xdir xclkab xclkba xsab xsba xax xbx isolation h x h or l h or l x x input input store a and b data h x -- xx real time b data to a bus l l x x x l output input stored b data to a bus l l x h or l x h real time a data to b bus l h x x l x input output stored a data to b bus l h h or l x h x truth table (2) note: 1. the data output functions may be enabled or disabled by various signals at the xoe or xdir inputs. data input functions are always enabled, i.e., data at the bus pins will be stored on every low-to-high transition on the clock inputs. 2. h = high voltage level, x = don't care, l = low voltage level, - = low-to-high transition 1 dir 1 clkab 1 sab gnd 1 a 1 1 a 2 v cc 1 a 3 1 a 4 1 a 5 gnd 1 a 6 1 a 7 1 a 8 2 a 1 2 a 2 2 a 3 gnd 2 a 4 2 a 5 2 a 6 v cc 2 a 7 2 a 8 gnd 2 sab 2 clkab 2 dir 1 oe 1 clkba 1 sba gnd 1 b 1 1 b 2 v cc 1 b 3 1 b 4 1 b 5 gnd 1 b 6 1 b 7 1 b 8 2 b 1 2 b 2 2 b 3 gnd 2 b 4 2 b 5 2 b 6 v cc 2 b 7 2 b 8 gnd 2 sba 2 clkba 2 oe 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33 25 26 27 28 32 31 30 29 56-pin v56 a56
pi74lpt16646 3.3v 16-bit registered transceivers 3 ps2073a 01/16/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 real-time transfer bus b to a xdir xoe xclkab xclkba xsab xsba llxxxl real-time transfer bus a to b xdir xoe xclkab xclkba xsab xsba hl x x l x storage from a and/or b transfer stores data to a and/or b xdir xoe xclkab xclkba xsab xsba hl - xxx ll x - xx xh -- xx xdir (1) xoe xclkab xclkba xsab xsba l l x h or l x h h l h or l x h x note: 1. cannot transfer data to a bus and b bus simultaneously. bus a bus b bus a bus b bus a bus b bus a bus b
pi74lpt16646 3.3v 16-bit registered transceivers 4 ps2073a 01/16/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 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 = ?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 ma 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 ma ? 0.2 0.4 v i ol = 24 ma ? 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 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. 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 .............................................................. ?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
pi74lpt16646 3.3v 16-bit registered transceivers 5 ps2073a 01/16/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 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) 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 ? 0.6v 0.6 2.3 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 ? 0.6v 2.1 4.7 (5) outputs open v in = gnd f i = 2.5 mh z 50% duty cycle x oe = gnd 16 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.
pi74lpt16646 3.3v 16-bit registered transceivers 6 ps2073a 01/16/97 1234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121234567890123456789012345678901 2123456789012 switching characteristics over operating range (1) lpt16646 lpt16646a lpt16646c 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 2.0 9.0 2.0 6.3 1.5 5.4 ns t phl bus to bus r l = 500 w t pzh output enable time 2.0 14.0 2.0 9.8 1.5 7.8 ns t pzl x dir or x oe to bus t phz output disable time (4) 2.0 9.0 2.0 6.3 1.5 6.3 ns t plz x dir or x oe to bus t plh propagation delay 2.0 9.0 2.0 6.3 1.5 5.7 ns t phl clock to bus t plh propagation delay 2.0 11.0 2.0 7.7 1.5 6.2 ns t phl xsba or xsab to bus t su setup time high or 4.0 ? 2.0 ? 2.0 ? ns low, b us to clock t h hold time high or 2.0 ? 1.5 ? 1.5 ? ns low, bus to clock t w clock pulse width (4) 6.0 ? 5.0 ? 5.0 ? ns high or low t sk (o) output skew (5) ? 0.5 ? 0.5 ? 0.5 ns 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 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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