1 memory all data sheets are subject to change without notice (858) 503-3300 - fax: (858) 4503-3301 - www.maxwell.com 16-bit buffers/drivers with 54lvth162244 ?2001 maxwell technologies. all rights reserved. 3-state outputs 12.19.01 rev 1 1000607 f eatures : ?r ad -p ak ? radiation-hardened against natural space radia- tion ? total dose hardness: - > 100 krad (si), depending upon space mission ? output ports have equivalent 22- ? series resistors, so no external resistors are required ? support mixed-mode signal operation (5v input and output voltages with 3.3v v cc ) ? support unregulated battery operation down to 2.7v ?typical v olp (output ground bounce) < 0.8v at v cc = 3.3v, t a = 25 c ?i off and power-up 3-state support hot insertion ? bus hold on data inputs eliminates the need for external pull-up/pull-down resistors ? distributed v cc and gnd pin configuration minimizes high- speed switching noise ? flow-through architecture optimizes pcb layout ? package: 48 pin r ad -p ak flat pack d escription : maxwell technologies? 54lvth 162244 devices are 16-bit buff- ers and line drivers designed for low-voltage (3.3v) v cc oper- ation, but with the capability to provide a ttl interface to a 5v system environment. thes e devices can be used as four 4-bit buffers, two 8-bit buffers, or one 16-bit buffer. these devices provide true outputs and symmetri cal active-low output-enable (oe ) inputs. the outputs, which are designed to source or sink up to 12 ma, include equivalent 22- ? series resistors to reduce over- shoot and undershoot. active bus-hol d circuitry is provided to hold unused or floating data inputs at a valid logic level. maxwell technologies' patented r ad -p ak ? packaging technol- ogy incorporates radiation shie lding in the microcircuit pack- age. it eliminates the need for box shielding while providing the required radiation shielding fo r a lifetime in orbit or space mission. in a geo orbit, r ad -p ak provides greater than 100 krad (si) radiation dose toleranc e. this product is available with screening up to class s. logic diagram
memory 2 all data sheets are subject to change without notice ?2001 maxwell technologies. all rights reserved. 16-bit buffers/drivers with 3-state outputs 54lvth162244 12.19.01 rev 1 1000607 t able 1. p inout d escription p in s ymbol d escription 1, 48, 25, 24 1oe -4oe output enable 2, 3, 5, 6 1y1-1y4 output 4, 10, 15, 21, 28, 34, 39, 45 gnd ground 7, 18, 31, 42 v cc supply voltage 8, 9, 11, 12 2y1-2y4 output 13, 14, 16, 17 3y1-3y4 output 19, 20, 22, 23 4y1-4y4 output 47, 46, 44, 43 1a1-1a4 input 41, 40, 38, 37 2a1-2a4 input 36, 35, 33, 32 3a1-3a4 input 30, 29, 27, 26 4a1-4a4 input t able 2. 162244 a bsolute m aximum r atings 1 1. stresses beyond listed under ?absolute maximum ratings? may c ause permanent damage to the device. these are stress rat- ings only and functional operation of the device at these or any other conditions beyond t hose indicated under ?recommended operating conditions? is not implied. ex posure to absolute-maximum- rated conditions for extended periods may affect device reliability. p arameter s ymbol m in m ax u nit supply voltage range v cc -0.5 4.6 v input voltage range 2 2. the input and output negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed. v i -0.5 7 v voltage range applied to any output in the high-impedance or power-off state 2 v o -0.5 7 v voltage range applied to any output in the high state 2 v o -0.5 to v cc 0.5 v current into any output in the low state i o -- 30 ma current into any output in the high state 3 3. this current flows only when the output is in the high state and v o > v cc . i o 30 -- ma input clamp current i ik (v i < 0) -- -50 ma output clamp current i ok (v o < 0) -- -50 ma operating temperature t a -55 125 c storage temperature range t s -65 150 c operating temperature range t a -55 125 c
memory 3 all data sheets are subject to change without notice ?2001 maxwell technologies. all rights reserved. 16-bit buffers/drivers with 3-state outputs 54lvth162244 12.19.01 rev 1 1000607 t able 3. d elta l imits p arameter v ariation i cc(op) 10% of specified value on table 5 i ozh 10% of specified value on table 5 i ozl 10% of specified value on table 5 t able 4. 162244 r ecommended o perating c onditions 1 1. all unused control inputs of the device must be hel d at high or low to ensure proper device operation. p arameter s ymbol m in m ax u nit supply voltage v cc 2.7 3.6 v high-level input voltage v ih 2--v low-level input voltage v il -- 0.8 v input voltage v i -- 5.5 v high-level output current i oh -- -12 ma low-level output current i ol -- 12 ma input transition rise or fall rate outputs enabled ? t/ ? v-- 10 ns/v power-up ramp rate ? t/ ? v cc 200 -- s/v operating temperature t a -55 125 c t able 5. 162244 dc e lectrical c haracteristics (v cc = 3.3v 10%, t a = -55 to +125c, unless otherwise specified ) p arameter s ymbol t est c onditions m in m ax u nit input clamp voltage v ik v cc = 2.7 i i = -18ma -- -1.2 v high-level output voltage v oh v cc = 3v i oh = -12 ma 2 -- v low-level output voltage v ol v cc = 3v i ol = 12 ma -- 0.8 v input current i i v cc = 0 or 3.6v vi = 5.5v -- 10 a v cc = 3.6v v i = v cc or gnd control inputs -- 1 v cc = 3.6v v i = v cc data inputs -- 1 v i = 0 -- -5 hold current i i(hold) v cc = 3v v i = 0.8v data inputs 75 -- a v i = 2v -75 -- output disabled leakage current - high i ozh v cc = 3.6v, v o = 3v -- 5 a
memory 4 all data sheets are subject to change without notice ?2001 maxwell technologies. all rights reserved. 16-bit buffers/drivers with 3-state outputs 54lvth162244 12.19.01 rev 1 1000607 output disabled leakage current - low i ozl v cc = 3.6v, v o = 0.5v -- -5 a power up current i ozpu 2 v cc = 0 to 1.5v, v o = 0.5v to 3v, oe = don?t care -- 100 a power down current i ozpd 2 v cc = 1.5v to 0, v o = 0.5v to 3v, oe = don?t care -- 100 a supply current i cc v cc = 3.6v outputs high -- 0.19 ma i o = 0 outputs low -- 5 v i = v cc or gnd outputs disabled -- 0.19 delta supply current ? i cc 1 v cc = 3v to 3.6v, one input at v cc -0.6v, other inputs at v cc or gnd -- 0.2 ma input capacitance c i 2 v i = 3v or 0 -- 8 pf input output capacitance c o 2 v o = 3v or 0 -- 15 pf 1. this is the increase in supply curr ent for each input that is at the s pecified ttl voltage level rather than v cc or gnd. 2. guaranteed by design. t able 6. 162244 ac e lectrical c haracteristics (t a = -55 to +125c, c l = 50 p f, unless otherwise specified ) p arameter s ymbol v cc = 3.3v v v cc = 2.7v u nit m in m ax m in m ax propogation delay time a to y t plh 1.1 4.6 -- 5.1 ns t phl 1.1 3.9 -- 4.5 output enable time oe to y t pzh 1.1 5.4 -- 6.7 ns t pzl 1.3 4.9 -- 6.1 output disable time oe to y t phz 1.6 5.9 -- 6.5 ns t plz 15.9--5.8 output skew t sk(o) -- -- -- -- ns t able 5. 162244 dc e lectrical c haracteristics (v cc = 3.3v 10%, t a = -55 to +125c, unless otherwise specified ) p arameter s ymbol t est c onditions m in m ax u nit
memory 5 all data sheets are subject to change without notice ?2001 maxwell technologies. all rights reserved. 16-bit buffers/drivers with 3-state outputs 54lvth162244 12.19.01 rev 1 1000607 f igure 1. l oad c ircuit for o utputs figure note: 1. c l includes probe and jog capacitance . f igure 2. p ulse d uration t able 7. f unction t able ( each 4- bit buffer ) inputs output oe ay lhh lll hxz p arameter m easurement i nformation t est s1 t plh /t phl open t plz /t pzl 6v t phz /t pzh gnd
memory 6 all data sheets are subject to change without notice ?2001 maxwell technologies. all rights reserved. 16-bit buffers/drivers with 3-state outputs 54lvth162244 12.19.01 rev 1 1000607 f igure 3. s etup and h old t imes f igure 4. p ropagation d elay t imes i nverting and n on - inverting o utputs f igure 5. o utput e nable t iming figure notes: 2. all input pulses are supplied by generators having the following characteristics: prr < 10 mhz, z o = 50 ? , t r < 2.5 ns, t f < 2.5 ns. 3. waveform 1 is for an output with internal conditions such t hat the output is low except when disabled by the output control. waveform 2 is for an output with internal conditions such that the output is high except when disabled by the output control. 4. the outputs are measured one at a time with one transition per measurement.
memory 7 all data sheets are subject to change without notice ?2001 maxwell technologies. all rights reserved. 16-bit buffers/drivers with 3-state outputs 54lvth162244 12.19.01 rev 1 1000607 f48-01 note: all dimensions in inches 48 p in r ad -p ak ? f lat p ackage s ymbol d imension m in n om m ax a 0.121 0.130 0.139 b 0.008 0.010 0.014 c 0.004 0.006 0.006 d -- 0.620 0.640 e 0.370 0.380 0.390 e1 -- -- 0.410 e2 0.200 0.210 0.220 e3 0.075 0.085 -- e 0.025 bsc l 0.275 0.285 0.295 q 0.000 0.019 0.045 s1 0.005 0.018 -- n48
memory 8 all data sheets are subject to change without notice ?2001 maxwell technologies. all rights reserved. 16-bit buffers/drivers with 3-state outputs 54lvth162244 12.19.01 rev 1 1000607 important notice: these data sheets are created using the chip manufacturer?s published specifications. maxwell technologies verifies functionality by testing key parameters either by 100% testing, sample test ing or characterization. the specifications presented within these data sheets represent the latest and most accurate information available to date. however, these specifications are subject to change without notice and maxwell technologies assumes no responsibility for the us e of this information. maxwell technologies? products are not authorized for use as critical components in li fe support devices or systems without express written approval from maxwell technologies. any claim against maxwell technologies must be made within 90 days from the date of shipment from maxwell tech- nologies. maxwell technologies? liability shall be limited to replacement of defective parts.
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