1 m e m o r y 16-bit bus transceivers with 54lvth162245 ?2002 maxwell technologies all rights reserved. 3-state outputs 11.15.02 rev 2 / / / / f eatures : ? a-port outputs 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 typicalv 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 pullup/pulldown resistors distributed v cc and gnd pin configuration minimizes high- speed switching noise flow-through architecture optimizes pcb layout total dose hardness: - > 100 krad (si), depending upon space mission package: 48 pin r ad -p ak ? flat pack d escription : maxwell technologies? 54lvth162245 devices are 16-bit (dual-octal) non-inverting 3-state transceivers designed for low-voltage (3.3v) v cc operation, but with the capability to provide a ttl interface to a 5v system environment. these devices can be used as two 8-bit transceivers or one 16-bit transceiver. the devices allow data transmission from the a bus to the b bus or form the b bus to the a bus, depending on the logic level at the direction-control (dir) input. the output enable (oe ) input can be used to disable the device so that the buses are effectively isolated. the a-port outputs, which are designed to source or sink up to 12 ma, include equivalent 22- ? series resistors to reduce overshoot and undershoot. maxwell technologies' patented r ad -p ak ? packaging technol- ogy incorporates radiation shielding in the microcircuit pack- age. it eliminates the need for box shielding while providing the required radiation shielding for a lifetime in orbit or space mission. in a geo orbit, r ad -p ak provides greater than 100 krad (si) radiation dose tolerance. this product is available with screening up to class s. logic diagram
m e m o r y 2 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. 16-bit bus transceivers with 3-state outputs 54lvth162245 11.15.02 rev 2 . t able 1. p inout d escription p in s ymbol d escription 1, 24 1dir - 2dir direction control 2, 3, 5, 6, 8, 9, 11, 12 1b1 - 1b8 output 4, 10, 15, 21, 28, 34, 39, 45 gnd ground 7, 18, 31, 42 v cc supply voltage 13, 14, 16, 17, 19, 20, 22, 23 2b - 2b8 output 25, 48 2oe -1oe output enable 26, 27, 29, 30, 32, 33, 35, 36 2a8 - 2a1 input 37, 38, 40, 41, 43, 44, 46, 47 1a8 - 1a1 input t able 2. 54lvth162245 a bsolute m aximum r atings 1 1. stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under ?rec- ommended operating conditions? is not implied. exposure 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 v cc +0.5 v current into any output in the low state bport aport i o -- -- 96 30 ma current into any output in the high state 3 bport aport 3. this current flows only when the output is in the high state and v o >v cc . i o -- -- 48 30 ma input clamp current i ik (v i <0) -50 -- ma output clamp current i ok (v o <0) -50 -- ma thermal resistance jc -- 5 c/w operating temperature range t a -55 125 c storage temperature range t s -65 150 c power dissipation pd -- 1 w
m e m o r y 3 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. 16-bit bus transceivers with 3-state outputs 54lvth162245 11.15.02 rev 2 t able 3. d elta l imits p arameter v ariation i cc(ol) 10% of specified value in table 5 i cc(oh) 10% of specified value in table 5 i cc(od) 10% of specified value in table 5 t able 4. 54lvth162245 r ecommended o perating c onditions 1 1. all unused control inputs of the device must be held at high or low 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 a port i oh -- -12 ma b port -- -24 low-level output current a port i ol -- 12 ma b port -- 48 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. 54lvth162245 dc e lectrical c haracteristics (v cc = 3.3v 10%, t a =-55 to +125 c, unless otherwise specified ) p arameter s ymbol t est c onditions s ubgroups m in m ax u nit input clamp voltage v ik v cc =2.7 i i = -18 ma 1, 2, 3 -- -1.2 v high-level output voltage v oh v cc =2.7vto 3.6v i oh = -100 a a port 1, 2, 3 v cc -0.2 -- v v cc =3v i oh =-12ma 2 -- v cc =2.7vto 3.6v i oh = -100 a b port 1, 2, 3 v cc -0.2 -- v cc =2.7v i oh =-8ma 2.4 v cc =3v, i oh =-24ma 2
m e m o r y 4 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. 16-bit bus transceivers with 3-state outputs 54lvth162245 11.15.02 rev 2 low-level output voltage v ol v cc =2.7vto 3.6v i ol = 100 a a port 1, 2, 3 -- 0.2 v v cc =3v i ol =12ma -- 0.8 v cc =2.7v i ol = 100 a b port 1, 2, 3 -- 0.2 i ol =24ma -- 0.5 v cc =3v i ol =16ma -- 0.4 i ol =32ma 0.5 i ol =48ma 0.55 input current i i v cc = 3.6v vi = vcc or gnd control inputs 1, 2, 3 -- 1 a v cc =0or 3.6v v i =5.5v -- 10 v cc =3.6v v i =5.5v aorb ports 1, 2, 3 -- 20 v i =v cc 5 v i =0 -- -10 hold current i i(hold) v cc =3v v i = 0.8v a inputs 1, 2, 3 75 -- a v i =2v -75 -- power up current i ozpu 2 v cc = 0 to 1.5v, v o =0.5vto3v,oe = don?t care 1, 2, 3 -- 100 a power down current i ozpd 2 v cc =1.5vto0,v o =0.5vto3v,oe = don?t care 1, 2, 3 -- 100 a supply current i cc v cc = 3.6v outputs high 1, 2, 3 -- 0.19 ma i o = 0 outputs low 1, 2, 3 -- 5 v i =v cc or gnd outputs disabled 1, 2, 3 -- 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 1, 2, 3 -- 0.3 ma input capacitance c i 2 v i = 3v or 0 1, 2, 3 -- 8 pf input output capaci- tance c o 2 v o = 3v or 0 1, 2, 3 -- 15 pf 1. this is the increase in supply current for each input that is at the specified ttl voltage level rather than v cc or gnd. 2. guaranteed by design. t able 5. 54lvth162245 dc e lectrical c haracteristics (v cc = 3.3v 10%, t a =-55 to +125 c, unless otherwise specified ) p arameter s ymbol t est c onditions s ubgroups m in m ax u nit
m e m o r y 5 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. 16-bit bus transceivers with 3-state outputs 54lvth162245 11.15.02 rev 2 t able 6. 54lvth162245 ac e lectrical c haracteristics (v cc = 3.3v 10%, t a =-55 to +125 c, unless otherwise specified ) p arameter s ymbol s ubgroups v cc =3.3v0.3 v cc =2.7v u nit m in m ax m in m ax propagation delay time atob t plh 9, 10, 11 1 3.5 -- 4 ns t phl 9, 10, 11 1 3.5 -- 3.9 propagation delay time btoa t plh 9, 10, 11 1 4.3 -- 5.3 ns t phl 9, 10, 11 1 4.2 -- 4.5 output enable time oe to b t pzh 9, 10, 11 1 4.8 -- 5.9 ns t pzl 9, 10, 11 1 4.8 -- 5.5 output enable time oe to a t pzh 9, 10, 11 1 5.5 -- 7.2 ns t pzl 9, 10, 11 1 5.4 -- 6.4 output disable time oe to b t phz 9, 10, 11 1 5.5 -- 5.8 ns t plz 9, 10, 11 1 5.5 -- 5.8 output disable time oe to a t phz 9, 10, 11 1 5.8 -- 6.5 ns t plz 9, 10, 11 1 6.3 -- 6.3 output skew t sk(o) 9, 10, 11 -- -- -- -- ns t able 7. f untion t able ( each 8- bit section ) inputs operation oe dir l l b data to a bus l h a data to b bus h x isolation
m e m o r y 6 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. 16-bit bus transceivers with 3-state outputs 54lvth162245 11.15.02 rev 2 f igure 1. l oad c ircuit figure note: 1. c l includes probe and jig capacitance. f igure 2. p ulse d uration f igure 3. s etup and h old t imes p arameter m easurement i nformation t est s1 t plh /t phl open t plz /t pzl 6v t phz /t pzh gnd
m e m o r y 7 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. 16-bit bus transceivers with 3-state outputs 54lvth162245 11.15.02 rev 2 f igure 4. p ropagation d elay t imes i nverting and n oninverting o utputs f igure 5. e nable and d isable t imes l ow - and h igh -l evel e nabling figure note: 2. waveform 1 is for an output with internal conditions such that 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.
m e m o r y 8 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. 16-bit bus transceivers with 3-state outputs 54lvth162245 11.15.02 rev 2 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 0.144 0.160 0.165 b 0.008 0.010 0.014 c 0.004 0.006 0.007 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 0.013 0.019 0.025 s1 0.005 0.018 -- n48 48 ldfp
m e m o r y 9 all data sheets are subject to change without notice ?2002 maxwell technologies all rights reserved. 16-bit bus transceivers with 3-state outputs 54lvth162245 11.15.02 rev 2 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 testing 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 use of this information. maxwell technologies? products are not authorized for use as critical components in life 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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