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| ?a ___________________________________ e? . " 9?-? 7 ???w e??-? t )???h . " 9 . " 9 . " 9 . " 9 xz1???t?? ? rd s??? ??????z ? ??z???? mvw ? . c q t 3 4 3 4 ?^? ?`?b{ 1???t?? ? rd s??? ???? ??w . " 9 . " 9 xz 3?q??? ??????w???p`o? r`h e? ?????????3?z 1???w ? rwh?tz t?????????u ?as xw e???????????3?zq mlh hrw?? gp?asr>f? y`?`h{ . " 9 . " 9 xz? a jw . " 9 t| q ? sw; ? ?`z 2??w???? ?? 3 4 ??-?3??;q`o ?-^?o m?b{ ??x???q3?? mcm ?qz p x?pw???3?t 0 pv? a??? ?yw3? ????e???u ? ?pb{ . " 9 . " 9 tx & . * ?7 ?thqz?h ? & ~s-?? 4 zt?lo c \b? s? ?nb? ????????u ??lom?h?z l c q t ?p??`w??? 8 u?q?b{ . " 9 . " 9 w???w????tx mvusxz . c q t?pw??? 8 ud pb{ . " 9 . " 9 . " 9 . " 9 w ? ? ?vxz?t "qslom?b{ . " 9 txz ? ? ?vu "ts? ? ??3?????t??u ??lom?b{\??w??xzmc?? 7 ?op ?^`?b{ ???x z? yw ?v mv^?z??? z???? ??e??? y 6tb???3?????s? t?loa ss ?? ? ?t?-^?om?b{3? ??xz ??u|??s?wt???? z? ?- ab??????; u ??lom?b{ ? ? ___________________________________ u e? . " 9?-?7 ?w e??-? u 1???t?? ? rd s??? ?? ???? ?^ . " 9 . " 9 u " ? ?v3?????t?? . " 9 u ???? mvt????`w??? 8 . " 9 . " 9 u . c q tw? ?^ . " 9 . " 9 u x?pw???3?t 0 ??-?3?? _______________________ ? ?? 3 4 3 4 ? ??????? ??????;+ ?a?? ?;+ & . *t ?s??-?3??;???3? ? m? - " / max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? ________________________________________________________________ maxim integrated products 1 19-1312; rev 0; 10/97 part max1481 cub max1481eub max1484 cub 0? to +70? -40? to +85? 0? to +70? temp. range pin-package 10 ?ax 10 ?ax 10 ?ax j ___________________________________ ? r?? ________________________________________________________________________ ??? ?? ?? ?? ??? ?? . c q t max1481 ?? 0.250 max1484 ?? 12 ? max1485 ? rd 0.250 MAX1486 ? rd 12 ?? ?? mv ??? 3??? ?? ??? ?? ? ~ ? ? ?v " 300 300 300 300 ???3? : 256 256 256 256 e? : ?-? 10 e? ?ax 10 e? ?ax 10 e? ?ax 10 e? ?ax max1484eub -40? to +85? 10 ?ax 3? ??? max1485 cub max1485eub MAX1486 cub 0? to +70? -40? to +85? 0? to +70? 10 ?ax 10 ?ax 10 ?ax MAX1486eub -40? to +85? 10 ?ax max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = +5v ?%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5v and t a = +25?.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. supply voltage (v cc ) ............................................................+7v control input voltage ( re , de, h/ f ) ...........-0.3v to (v cc + 0.3v) driver input voltage (di).............................-0.3v to (v cc + 0.3v) driver output voltage (a, b, y, z) ..........................-8v to +12.5v receiver input voltage, half duplex (y, z) ............-8v to +12.5v receiver input voltage, full duplex (a, b).............-8v to +12.5v receiver output voltage (ro)....................-0.3v to (v cc + 0.3v) continuous power dissipation 10-pin ?ax (derate 5.6mw/? above +70?) ............444mw operating temperature ranges max148_c_ _ ......................................................0? to +70? max148_e_ _....................................................-40? to +85? storage temperature range .............................-65? to +160? lead temperature (soldering, 10sec) .............................+300? r = 50 (rs-422), figure 5 no load, figure 5 -7v v out 12v de = gnd de, di, re , h/ f de, di, re , h/ f r = 50 or 27 , figure 5 r = 50 or 27 , figure 5 r = 50 or 27 , figure 5 de = gnd, v cc = gnd or 5.25v de, di, re , h/ f conditions ma 35 250 i osd driver output short-circuit current (note 3) ? -10 i o 10 output leakage (y and z) (max1481/max1484 only) ma 0.125 i in2 input current (y and z for half duplex, a and b for full duplex) ? ? i in1 input current 2.0 v od1 differential driver output 5 v 0.8 v il1 input low voltage v 2.0 v ih1 input high voltage v 0.2 ? v oc change in magnitude of common-mode voltage (note 2) v 0.2 ? v od change in magnitude of differential output voltage (note 2) v 3 v oc driver common-mode output voltage units min typ max symbol parameter de = gnd -100 i o ? 125 output leakage (y and z) (max1485/MAX1486 only) v od2 r = 27 (rs-485), figure 5 v 1.5 5 v in = 12v v in = -7v v in = 12v v in = -7v v in = 12v v in = -7v -0.1 driver driver input to output max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? _______________________________________________________________________________________ 3 electrical characteristics (continued) (v cc = +5v ?%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5v and t a = +25?.) (note 1) switching characteristics (max1484/MAX1486) (v cc = 5v ?%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5v and t a = +25?.) -7v v cm 12v -7v v cm 12v i o = 4ma, v id = -200mv i o = -4ma, v id = 200mv 0.4v v o 2.4v conditions k 96 r in receiver input resistance ? ? i ozr three-state output current at receiver mv 70 ? v th receiver input hysteresis mv -200 200 v th receiver differential threshold voltage v 0.4 v ol receiver output low voltage v 3.5 v oh receiver output high voltage units min typ max symbol parameter 0v v ro v cc re = gnd, de = v cc ma ?5 i osr receiver output short-circuit current ? 300 600 i cc no-load supply current de = gnd, re = v cc ? 0.1 10 i shdn supply current in shutdown mode (max1481 only) r diff = 54 , c l1 = c l2 = 100pf, figures 7 and 9 r diff = 54 , c l1 = c l2 = 100pf, figures 7 and 9 conditions ns 510 t dskew driver output skew | t dplh - t dphl | 30 60 t dplh ns 30 60 t dphl driver input to output units min typ max symbol parameter c l = 15pf, s1 closed, figures 8 and 10 c l = 100pf, s2 closed, figures 8 and 10 c l = 100pf, s1 closed, figures 8 and 10 ns 40 70 t dlz driver disable time from low ns 40 70 t dzh driver enable to output high ns 40 70 t dzl driver enable to output low mbps 12 f max maximum data rate c l = 15pf, s2 closed, figures 8 and 10 c l = 100pf, s2 closed, figures 6 and 12 c l = 100pf, s1 closed, figures 6 and 12 ns 20 50 t rzh receiver enable to output high ns 20 50 t rzl receiver enable to output low ns 40 70 t dhz driver disable time from high c l = 100pf, s2 closed, figures 6 and 12 c l = 100pf, s1 closed, figures 6 and 12 ns 20 50 t rhz receiver disable time from high ns 20 50 t rlz receiver disable time from low figures 11 and 13 ns 5 t rskd | t rplh - t rphl | differential receiver skew figures 11 and 13 ns 90 150 t rplh , t rphl receiver input to output r diff = 54 , c l1 = c l2 = 100pf, figures 7 and 9 ns 51535 t dr , t df driver rise or fall time receiver supply current max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? 4 _______________________________________________________________________________________ switching characteristics (max1481/max1485) (continued) (v cc = 5v ?%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5v and t a = +25?.) note 1: all currents into the device are positive; all currents out of the device are negative. all voltages are referenced to device ground unless otherwise noted. note 2: ? v od and ? v oc are the changes in v od and v oc , respectively, when the di input changes state. note 3: maximum current level applies to peak current just prior to foldback-current limiting; minimum current level applies during current limiting. note 4: shutdown is enabled by bringing re high and de low. if the enable inputs are in this state for less than 50ns, the max1481 is guaranteed not to enter shutdown. if the enable inputs are in this state for at least 600ns, the max1481 is guaranteed to have entered shutdown. c l = 15pf, s1 closed, figures 8 and 10 c l = 100pf, s2 closed, figures 8 and 10 r diff = 54 , c l1 = c l2 = 100pf, figures 7 and 9 c l = 100pf, s1 closed, figures 8 and 10 r diff = 54 , c l1 = c l2 = 100pf, figures 7 and 9 ns 200 t dlz c l = 100pf, s2 closed, figures 6 and 12 driver disable time from low c l = 100pf, s1 closed, figures 6 and 12 r diff = 54 , c l1 = c l2 = 100pf, figures 7 and 9 ns 3000 t dzh driver enable to output high ns 3000 conditions t dzl driver enable to output low kbps 250 f max maximum data rate c l = 15pf, s2 closed, figures 8 and 10 c l = 100pf, s2 closed, figures 6 and 12 c l = 100pf, s1 closed, figures 6 and 12 ns 10 200 t dskew driver output skew | t dplh - t dphl | figures 11 and 13 ns ns 20 50 t rzh receiver enable to output high ns 20 50 t rzl receiver enable to output low ns 200 t dhz driver disable time from high ns ns 20 50 t rhz receiver disable time from high 90 150 t rplh , t rphl receiver input to output 250 1000 t dr , t df driver rise or fall time ns 20 50 t rlz receiver disable time from low figures 11 and 13 ns 15 t rskd | t rplh - t rphl | differential receiver skew 600 1000 t dplh ns 600 1000 t dphl driver input to output units min typ max symbol parameter max1481 only (note 4) ns 50 200 600 t shdn time to shutdown max1481 only, c l = 15pf, s2 closed, figures 8 and 10 ns 3000 t dzh(shdn) driver enable from shutdown to output high max1481 only, c l = 15pf, s1 closed, figures 8 and 10 ns 3000 t dzl(shdn) driver enable from shutdown to output low max1481 only, c l = 100pf, s1 closed, figures 6 and 12 ns 1000 t rzl(shdn) receiver enable from shutdown to output low max1481 only, c l = 100pf, s2 closed, figures 6 and 12 ns 500 t rzh(shdn) receiver enable from shutdown to output high max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? _______________________________________________________________________________________ 5 220 260 240 300 280 340 320 360 -60 -20 0 -40 20 40 60 80 100 no-load supply current vs. temperature max1481/4/5/6-01 temperature (?) supply current ( m a) max1481/max1485 max1484/MAX1486 0 10 30 20 50 40 60 0 1 2345 output current vs. receiver output low voltage max1481/4/5/6-02 output low voltage (v) output current (ma) 0 5 15 10 25 20 30 0 1 2345 output current vs. receiver output high voltage max1481/4/5/6-03 output low voltage (v) output current (ma) 94 98 106 102 110 114 -60 -20 0 -40 20 40 60 80 100 shutdown current vs. temperature max1481/4/5/6-04 temperature (?) shutdown current (na) 75 80 90 85 100 95 105 -60 -20 0 -40 20 40 60 80 100 max1481/max1485 receiver propagation delay vs. temperature max1481/4/5/6-07 temperature (?) propagation delay (ns) c load = 15pf 0.10 0.20 0.15 0.35 0.30 0.25 0.45 0.40 0.50 -60 -20 0 -40 20 40 60 80 100 receiver output low voltage vs. temperature max1481/4/5/6-05 temperature (?) output low voltage (v) i ro = 8ma 3.8 4.0 3.9 4.2 4.1 4.4 4.3 4.5 -60 -20 0 -40 20 40 60 80 100 receiver output high voltage vs. temperature max1481/4/5/6-06 temperature (?) output voltage (v) i ro = 8ma 86 87 90 89 88 93 92 91 94 -60 -20 0 -40 20 40 60 80 100 max1484/MAX1486 receiver propagation delay vs. temperature max1481/4/5/6-08 temperature (?) propagation delay (ns) c load = 15pf 540 580 560 620 600 660 640 680 -60 -20 0 -40 20 40 60 80 100 max1481/max1485 driver propagation delay vs. temperature max1481/4/5/6-09 temperature (?) propagation delay (ns) r diff = 54 w c l1 = c l2 = 100pf a j ?^ ? q ______________________________________________________________________ (v cc = +5v, t a = +25?, unless otherwise noted.) max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? 6 _______________________________________________________________________________________ a j ?^ ? q v _________________________________________________________________ (v cc = +5v, t a = +25?, unless otherwise noted.) 18 26 22 30 34 38 -60 -20 0 -40 20 40 60 80 100 max1484/MAX1486 driver propagation delay vs. temperature max1481/4/5/6-10 temperature (?) propagation delay (ns) r diff = 54 w c l1 = c l2 = 100pf 0 60 40 20 80 120 100 140 04 2681012 output current vs. driver output low voltage max1481/4/5/6-11 output low voltage (v) output current (ma) 0 40 20 60 100 80 120 -8 -4 -2 -6 0 2 4 6 output current vs. driver output high voltage max1481/4/5/6-12 output high voltage (v) output current (ma) 2.10 2.15 2.25 2.20 2.35 2.30 2.40 -60 -20 0 -40 20 40 60 80 100 driver differential output voltage vs. temperature max1481/4/5/6-13 temperature (?) output voltage (v) r diff = 54 w v a - v b ro (2v/div) (5v/div) 1 m s/div max1481/max1485 receiver propagation delay max1481/4/5/6-16 100 0.01 0 2.5 3.0 3.5 4.0 4.5 0.5 1.0 1.5 2.0 5.0 driver output current vs. differential output voltage 0.1 max1481/4/5/6-14 differential output voltage (v) output current (ma) 1 10 v a - v b ro (2v/div) (5v/div) 50ns/div max1484/MAX1486 receiver propagation delay max1481/4/5/6-15 di v y - v z (5v/div) (2v/div) 1 m s/div max1481/max1485 driver propagation delay max1481/4/5/6-17 di v y - v z 5v/div 2v/div 50ns/div max1484/MAX1486 driver propagation delay max1481/4/5/6-18 pin max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? _______________________________________________________________________________________ 7 z? ? __________________________________________________________________________ 1 1 3? z?{ re u?p " # 3 n 7ts?qz 3 0u??ts?z " # n 7ts?q 3 0u?ts??b{ 2 ??? ???????? ??{???????t??w ? x ) f ? 7 $ $ t ? `z??????t??w ?x ( / %t ? `?b{ 2 3? z???? ??{ 3 0????b?txz re ??t? ?`?b{ 3 0 x z re u??wt????e???ts??b{ ``z . " 9 w ? xz re ???tz % &??t? ?b?q ? ??3?????t??t ???b{ 3 3 ??? z???? ??{??? z?????b?txz % &???t ? ?`?b{\??w z?xz % &u?wt????e???ts??b{ 4 4 ??? ??{ % &u??pz % *u?wtz ? s 8 z?u?tz s 8 z?u ??ts??b{ ?7t % *u??wxz ? s 8 z?u??tz s 8 z?u? ts??b{ 5 5 ???? 6 6 s 83? ?? 3? ?? ? 7 7 s 8??? z? s 8??? z?t| s 83? ?? 8 8 ? s 8??? z? ? s 8??? z?t| ? s 83? ?? 9 9 ? s 83? ?? 3? ?? ? 10 10 y ?o? +4.75v v cc +5.25v max1481/ max1484 1 ro 2 h/ f z? re 3 de 4 di 5 gnd b 6 b z 7 z y 8 y a 9 a 10 v cc max1485/MAX1486 h/ f f = 0 ;y ? h/ f f = 1 . " 9 . " 9 w? ???????t??pxz??? z?x3? ??wta?`?b{???? ??3? ?? "t| # x a??? ?y??lh??pbuzfw3?tx ? ^??d?{ output inputs max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? 8 _______________________________________________________________________________________ re de x 1 x 1 0 0 1 0 di z 1 0 0 1 x high-z x inputs ; ________________________________________________________________________________________________ transmitting y 1 0 high-z high-z and shutdown outputs max1481 max1484 max1485/MAX1486 re de 0 x 0 x 1 1 1 0 high-z and shutdown output a-b ro 3 0.2v 1 -0.2v 0 x high-z x inputs receiving transmitting re de y x 1 1 x 1 0 x 0 high-z outputs di z 1 0 0 1 x high-z inputs re de 0 x 0 x 1 x output a-b ro 3 0.2v 1 -0.2v 0 x high-z inputs receiving de di transmitting 1 1 1 0 0 x z y 0 1 1 0 high-z high-z outputs receiving h/ f de ro 0 x 1 0 x 0 1 0 1 output a-b y-z 3 0.2v x -0.2v x x 3 0.2v inputs 1 0 0 x -0.2v 9 ? ?? 3?????t??pxz???t|3?u????e???ts??b{ inputs max1481/max1484/max1485/MAX1486 _______________________________________________________________________________________ 9 1 2 3 4 5 1 9a r t r t 10 0.1 m f 5 gnd 6b z 7 8 y ro re de di 2 3 4 10 9 8 7 6 v cc a y z di de re ro max1481 max1484 max1481 max1484 max1481 max1484 m max top view b gnd 8 4 10 0.1 m f 5 gnd 3 2 di de re ro 1 y z b a 7 6 9 v cc v cc 1 2 3 4 5 1 9a r t r t 10 0.1 m f v cc 5 gnd 6b z 7 8 y ro h/f de di 2 3 4 10 9 8 7 6 v cc a y z di de h/f ro max1485 MAX1486 max1485 MAX1486 max1485 MAX1486 m max top view b gnd 8 4 10 0.1 m f v cc 5 gnd 3 2 di de h/f ro 1 y z b a 7 6 9 v cc v cc 1 2 3 4 5 1 8 y r t 10 0.1 m f 5 gnd 7z a 9 6 b ro h/f de di 2 3 4 10 9 8 7 6 v cc a y z di de h/f ro max1485 MAX1486 max1485 MAX1486 max1485 MAX1486 m max top view b gnd r t 8 4 10 0.1 m f 5 gnd 3 2 di de h/f ro 1 y z 7 9 a b 6 v cc v cc $ . " 9 . " 9 we? ?t| sa a j??????? ?^s? 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? $ . " 9 . " 9 we? ?t| a j?????? ?^s? $ . " 9 . " 9 we? ?t| sa a j?????? ?^s? max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? 10 ______________________________________________________________________________________ ?i ___________________________________ 3 4 3 4 ?;? ???3? . " 9 . " 9 . " 9 . " 9 txz mw??? q mw3?u o ^?om?b{ . " 9 . " 9 xz & . *?7 ?thqz ? & ~s-?? 4 z t?lo c \b? s? ?nb? ??????? ?u ??lom?h?z l c q t ?p??`w ??? 8 u?q?b{ . " 9 . " 9 w?? ?w????x mv^?omsmh?z . c q t ?pw??? 8 ud pb{ \??w???3?xz 7w o ?op ?^b? ?ot ?-^?z ?yt|???????? `h ? ?yw ? ? ?vx a jp "qslom? b{ . " 9 xz ? ? ?vu a jp "t ?<b? 3?????t??? ?qom?b{ ???x z? yw ?v mv^?z??? z?? ????e??? y 6tb???3????? s?t?loa ss ?? ? ?t?-^?om?b{ \??w??xb?oz p x?pw ???3?t 0 pv? a??? ?yw3? ????e???? ?qom?b{ . " 9 . " 9 x?????? ?;t ?-^? om?b{ . " 9 . " 9 tk? ) f e?t??z ??????? ?^x?????? ?^?a?2?u ? rpv?b $ { . " 9 . " 9 w ??? ??????t?? ?^ . " 9 . " 9 x ??????t?? x???????t??p ?^^d?\q upv?b{?????? ?^w ?xz ) f e???t? ?b?tz?hx ( / %t ? `z??? ???? ?^w ?xz ) f e????t? ? `?b{??????t??pxz??? q3?we? ?x . " 9 q ?ats??b $ { ??-?3?? ?c ___________________ w???3? x a j 3 4 3?w ????e???x l a??? ?y pz a j???px a??? ?y ?p?? ?pv?b{ . " 9 . " 9 . " 9 . " 9 ???3?w ????e???x a??? ?y l tslom?h?z mw ? ???t x?pw???3???t ? pv ?b{ hlo a??? ?y?ppk?yz\??w ??? ?w dp ? b?\q?z w 3 4 ???3?q ? b?\q?pv?b{ & . *t| sw ?n . " 9 . " 9 x????u mv^?om? h?z & . *?7 ?thqz?h ? & ~s-?? 4 zt ?lo c \b? s? ?n`?b{ $ tz . " 9 p 8 `h l ) [ w ??w???w z? tt|?? ?r s??`?b{ ?w gvm? e t r uk? wu ??b{ . " 9 p\?q ?a ep 8 ? ?lh ?w ??? $ t?`?b{ $ q z??qz $ px? e t r w ?uhm?? ?^xz & . *w d qx g ?t ?n`om?b{ `tz??????wq ?xz ?^s s t izu \a??os sw 4 z 0 w ?^t ? `?b{\w?p bqzw?ots? ?b{ ?^ u 3 * 4 & y o t g u \\pz u 3 * 4 & x??????wq ???`?b{ ?qyz . " 9 wq ?x a j o t p z ?????pw 0 p?h t??`?b{ 6 " 3 5 w????w 2t tu? b?yz\???? ?m 4 z 0 p??{rm sui\lhq`o ?z3ax y t ?^b??wq???b{ max1485 MAX1486 b di de ro v cc gnd a z y h/f $ . " 9 . " 9 w????3?? ????? $ ???w??? ????????? a? ?y $ 3?w??? ????????? a? ?y max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? ______________________________________________________________________________________ 11 r r y z v od v oc receiver output test point 1k 1k s1 s2 v cc c l di de 3v y z c l1 c l2 r diff v id output under test 500 w s1 s2 v cc c l di 3v 0v z y v o 0v -v o v o 1.5v t dplh 1/2 v o 10% t r 90% 90% t dphl 1.5v 1/2 v o 10% t f v diff = v y - v z v diff t skew = | t plh - t phl | $ ???w ; ? ? output normally low output normally high 3v 0v y, z v ol y, z 0v 1.5v 1.5v v ol +0.5v v oh -0.5v 2.3v 2.3v t dzl(shdn) , t dpl t dlz d zh(shdn) , d zh d hz de $ ???w???t|???? $ ???w % $a? ?y $ ???w?????a?s? $ 3?w???t|???? . " 9 . " 9 w? max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? 12 ______________________________________________________________________________________ ? ??3?????t?? . " 9 w? ? ??3?????t??xz re ???tz % &?? tb?\qt?loi ?`?b{3?????t?? pxz . " 9 w ? ? ?vu?t "ts??b{ re q % &x ?t? ?b?\qupv?b{ re u?? p % &u?w y 6u o t tsz?yz3??? ??t??tx ~? 8???d?{\??w ??u ?sxq? o t \w y 6t??^??qz3??? ??t??t ~? 8??\qu- a^?om?b{ ? 4 x j u d i j o h $ i b s b d u f s j t u j d t w??? u @ ; ) t| u @ ; - xz \w ? ?u ? ??3?????t?? pstl h?wq y `om?b{?hz??? u @ ; ) 4 ) % / t| u @ ; - 4 ) % / xz\w ? ?u3????? t??pklh?wq y `om?b{???q3? u ? ??3?????t??t????^? ??pttt? u @ ; ) 4 ) % / z u @ ; - 4 ) % / xz?? ? 3?????t??t?w u @ ; ) z u @ ; - ??? ?xs??b{ ???w z?- ????w?t?loi\? z?a ?vt| a ?? ? ?t 0`oxz mw-; u ?v?b{ mxzt?t?? ?y c?w yws?t 0`o j t-; u ?^b? z? ?w?wa ?v mv ? a j ?^ ? q ? pb{?o mxz??w9 sua t `ht??? z?u m $t????e? ?? y 6t ????3?????; pb{ ??? ? 0????? 3 4 3 4 a jxz ?????pw??? ? t 0 `om?b{ ????? q? ?xz $ t?b?e????-?3????;`oxi^m{ $ t| $ tz ?yp ????w " 8 ( ???????? ?`hw3a ) ? ?y??`?b{ v oh v ol a b 1v -1v 1.5v 1.5v output input ro r plh r phl $ 3?w ; ? ? output normally low output normally high 3v 0v v cc ro ro 0v 1.5v 1.5v v ol + 0.5v v oh - 0.5v 1.5v 1.5v r zl(shdn) , r zl r lz r zh(shdn) , r zh r hz re r b receiver output ate a v id r $ 3?w ; ? ?a?s? 20db/div 250khz/div 2.5mhz 0hz max1481/4/5/6-fig14 $ . " 9 . " 9 p l ) [w ??? ? `hw???w z? tt| ' ' 5?? max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? ______________________________________________________________________________________ 13 a j??-?3?? . " 9 . " 9 x z????? ; ???tsz? m2??? ?;q`o ?-^?o m?b{ $ t| $ tz / $s??????? -?3??s???`?b{\??w ? ?xz ????? w-?? ???m????e??q` o?;b?\q?pv?b $ { s?7 ?tb?h?txz ? q??e??? op ???w? z? 4 z rg`zy?????t?w 0 xpv?iz yx`oxi^m{???? mv^ ?om? . " 9 . " 9 xz ? ?s 4 z rg t 0b??0 su . " 9 . " 9 ????xsl om?b{ 20db/div 250khz/div 2.5mhz 0hz max1481/4/5/6-fig15 $ . " 9 . " 9 p l ) [w ??? ? `hw???w z? tt| ' ' 5?? 120 w 120 w data in data out r d ro re de di h/f a b z y max1481 max1484 max1485 MAX1486 note: re on max1481 and max1484 only. h/f on max1485 and MAX1486 only. $ ????e?? v a - v b di ro 5v/div 5v/div 4v/div 5 m s/div max1481/4/5/6-fig17 $ l ) [ p ????w 4 z-??? ? ?`hw . " 9 . " 9 w3a ) ? ?y v a - v b di ro 5v/div 5v/div 4v/div 1 m s/div max1481/4/5/6-fig18 $ l ) [ p ????w 4 z-??? ? ?`hw . " 9 . " 9 w3a ) ? ?y max1481/max1484/max1485/MAX1486 14 ______________________________________________________________________________________ di ro de a b ro ro ro di di di de de de d d d r r r b b b a a a 120 w 120 w d r max1485 MAX1486 v cc 5v h/f v cc 5v h/f v cc 5v v cc v cc h/f $ / $s??????? 3 4 ????? 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? max1481/max1484/max1485/MAX1486 ______________________________________________________________________________________ 15 120 w 120 w r d ro de di a b y re* re* 120 w 120 w di di di ro ro ro de de de re re* z z z z y y y aa a bb b d d d r r r max1481 max1484 max1485 MAX1486 *re on max1481 and max1484 only. **h/f on max1485 and MAX1486 only. h/f** h/f** h/f** h/f** $ / $s?????? 3 4 ????? ?? ?c _____________________________ transistor count: 396 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? max1481/max1484/max1485/MAX1486 1??? ? rd z??? ??????z???? mv . c q tz 3 4 3 4 ???3?z . " 9?-? ?3tpx ? .u?3t a ?p?q^?om?s???ws?w?;tmmox y ??j?d?{s? ?????xt^? om?d?{ ?3tx 5's`ts?t|?7?!?b?vb?-y`?b{ 16 ____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 1997 maxim integrated products is a registered trademark of maxim integrated products. ?-? ________________________________________________________________________ 10lumaxb.eps b eg 3 ? f? n y s b ? > ?o? ?? 5 & - ' " 9 |
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