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1 ? fn6085.6 ISL83080E, isl83082e, isl83083e, isl83085e, isl83086e, isl83088e 15kv esd protected, 5v, full fail-safe, fractional (1/8) unit load, rs-485/rs-422 transceivers the isl8308xe are bicmos, esd protected, 5v powered, single transceivers that meet both the rs-485 and rs-422 standards for balanced communication. each driver output, and receiver input, is protected against 15kv esd strikes without latch-up, and unlike com petitive products, this intersil family is specified for 10% tolerance supplies (4.5v to 5.5v). these devices have very low bus currents (+125 a/-75 a), so they present a true ?1/8 uni t load? to the rs-485 bus. this allows up to 256 transceivers on the network without violating the rs-485 specification?s 32 uni t load maximum, and without using repeaters. for example, in a remote utility meter reading system, individual meter readings are routed to a concentrator via an rs-485 network, so the high allowed node count minimizes the number of repeaters required. data for all meters is then read out from the concentrator via a single access port, or a wireless link. receiver (rx) inputs feature a ?full fail-safe? design, which ensures a logic high rx output if rx inputs are floating, shorted, or terminated but undriven. the ISL83080E, isl83082e, isl83083e, isl83085e utilize slew rate limited drivers which reduce emi, and minimize reflections from improperly terminated transmission lines, or unterminated stubs in multidrop and multipoint applications. slew rate limited versions also include receiver input filtering to enhance noise immunity in the presence of slow input signals. hot plug circuitry ensures that the tx and rx outputs remain in a high impedance state until the power supply has stabilized, and the tx outputs are fully short circuit protected. the ISL83080E, isl83083e, isl83086e are configured for full duplex (separate rx input and tx output pins) applications. the half duplex versions multiplex the rx inputs and tx outputs to allow transceivers with output disable functions in 8 lead packages. features ? pb-free plus anneal available (rohs compliant) (see ordering info) rs-485 i/o pin esd protection . . . . . . . . . . 15kv hbm class 3 esd protection (hbm) on all pins. . . . . . . . >7kv full fail-safe (open, short, terminated and floating) receivers hot plug circuitry (isl83 080e, isl83082e, isl83083e, isl83085e) - tx and rx outputs remain three-state during power- up/power-down true 1/8 unit load allows up to 256 devices on the bus specified for single 5v, 10% tolerance, supplies high data rates. . . . . . . . . . . . . . . . . . . . . up to 10mbps low quiescent supply current . . . . . . . . . . . . . . . 530 a ultra low shutdown supply current . . . . . . . . . . . . 70na -7v to +12v common mode input voltage range half and full duplex pinouts three-state rx and tx outputs current limiting and thermal shutdown for driver overload protection applications automated utility meter reading systems high node count systems factory automation field bus networks security camera networks building environmental control systems industrial/process control networks table 1. summary of features part number half/full duplex data rate (mbps) slew-rate limited? hot plug # devices on bus rx/tx enable? quiescent i cc ( a) low power shutdown? pin count ISL83080E full 0.115 yes yes 256 yes 530 yes 14 isl83082e half 0.115 yes yes 256 yes 530 yes 8 isl83083e full 0.5 yes yes 256 yes 530 yes 14 isl83085e half 0.5 yes yes 256 yes 530 yes 8 isl83086e full 10 no no 256 yes 530 yes 14 isl83088e half 10 no no 256 yes 530 yes 8 data sheet caution: these devices are sensitive to electrostatic discharge; follow proper ic handling procedures. 1-888-intersil or 321-724-7143 | intersil (and design) is a registered trademark of intersil americas inc. copyright ? intersil americas inc. 2004-2005. all rights reserved all other trademarks mentioned are the property of their respective owners. september 12, 2005
2 fn6085.6 september 12, 2005 pinouts isl83082e, isl83085e, isl83088e (msop, soic) top view ISL83080E, isl83083e, isl83086e (soic) top view ro re de di 1 2 3 4 8 7 6 5 v cc b/z a/y gnd d r nc ro re de di gnd gnd v cc nc a b z y nc 1 2 3 4 5 6 7 14 13 12 11 10 9 8 d r ordering information (note 1) part no. (brand) temp. range (c) package pkg. dwg. # ISL83080Eib (83080eib) -40 to 85 14 ld soic m14.15 ISL83080Eibz (83080eibz, note 2) -40 to 85 14 ld soic (pb-free) m14.15 isl83082eib (83082eib) -40 to 85 8 ld soic m8.15 isl83082eibz (83082eibz, note 2) -40 to 85 8 ld soic (pb-free) m8.15 isl83082eiu (3082e) -40 to 85 8 ld msop m8.118 isl83082eiuz (3082z, note 2) -40 to 85 8 ld msop (pb-free) m8.118 isl83083eib (83083eib) -40 to 85 14 ld soic m14.15 isl83083eibz (83083eibz, note 2) -40 to 85 14 ld soic (pb-free) m14.15 isl83085eib (83085eib) -40 to 85 8 ld soic m8.15 isl83085eibz (83085eibz, note 2) -40 to 85 8 ld soic (pb-free) m8.15 isl83085eiu (3085e) -40 to 85 8 ld msop m8.118 isl83085eiuz (3085z, note 2) -40 to 85 8 ld msop (pb-free) m8.118 isl83086eib (83086eib) -40 to 85 14 ld soic m14.15 isl83086eibz (83086eibz, note 2) -40 to 85 14 ld soic (pb-free) m14.15 isl83088eib (83088eib) -40 to 85 8 ld soic m8.15 isl83088eibz (83088eibz, note 2) -40 to 85 8 ld soic (pb-free) m8.15 isl83088eiu (3088e) -40 to 85 8 ld msop m8.118 isl83088eiuz (3088z, note 2) -40 to 85 8 ld msop (pb-free) m8.118 notes: 1. units also available in tape and reel; add ?-t? to suffix. 2. intersil pb-free products employ special pb-free material sets; molding compounds/die attach materials and 100% matte tin plate termination finish, which are rohs compliant and compatible with both snpb and pb- free soldering operations. intersil pb-fr ee products are msl classified at pb-free peak reflow temperatures that meet or exceed the pb-free requirements of ipc/jedec j std-020. ordering information (note 1) (continued) part no. (brand) temp. range (c) package pkg. dwg. # ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
3 fn6085.6 september 12, 2005 truth tables transmitting inputs outputs re de di z y x1101 x1010 0 0 x high-z high-z 1 0 x high-z * high-z * note: *shutdown mode (see note 9). receiving inputs output re de half duplex de full duplex a-b ro 00 x -0.05v 1 00 x -0.2v 0 0 0 x inputs open/shorted 1 1 0 0 x high-z * 1 1 1 x high-z note: *shutdown mode (see note 9). pin descriptions pin function ro receiver output: if a-b -50mv, ro is high; if a-b -200mv, ro is low; ro = high if a and b are unconnected (floating) or shorted. re receiver output enable. ro is enabled when re is low; ro is high impedance when re is high. de driver output enable. the driver outputs, y and z, are enabled by bringing de high. they are high impedance when de is low. di driver input. a low on di forces output y low and output z hi gh. similarly, a high on di forces output y high and output z lo w. gnd ground connection. a/y 15kv hbm esd protected rs-485/422 level, noni nverting receiver input and noninverting driv er output. pin is an input if de = 0; pin is an output if de = 1. b/z 15kv hbm esd protected rs-485/422 level, inve rting receiver input and inverting driver out put. pin is an input if de = 0; pin i s an output if de = 1. a 15kv hbm esd protected rs-485/422 le vel, noninverting receiver input. b 15kv hbm esd protected rs-485/422 level, inverting receiver input. y 15kv hbm esd protected rs-485/422 le vel, noninverting driver output. z 15kv hbm esd protected rs-485/422 level, inverting driver output. v cc system power supply input (4.5v to 5.5v). nc no connection. ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
4 fn6085.6 september 12, 2005 typical operating circuit isl83082e, isl83085e, isl83088e ISL83080E, isl83083e, isl83086e 0.1 f + d r 7 6 8 1 2 3 4 5 v cc gnd ro re de di a/y b/z +5v 0.1 f + d r 6 7 8 1 2 3 4 5 v cc gnd ro re de di a/y b/z +5v r t r t 0.1 f + d r 12 11 10 9 14 2 3 4 5 6, 7 v cc gnd ro re de di a b y z +5v 0.1 f + d r 12 11 10 9 14 2 3 4 5 6, 7 v cc gnd ro re de di a b y z +5v r t r t ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
5 fn6085.6 september 12, 2005 absolute maximum ratings thermal information v cc to ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7v input voltages di, de, re . . . . . . . . . . . . . . . . . . . . . . . . . -0.3v to (v cc + 0.3v) input/output voltages a, b, y, z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -9v to +13v a, b, y, z (transient pulse through 100 ? ) . . . . . . . . . . . . . 25v ro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3v to (v cc +0.3v) short circuit duration y, z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous esd rating . . . . . . . . . . . . . . . . . . . . . . . . . see specification table thermal resistance (typical, note 3) ja (c/w) 8 ld soic package . . . . . . . . . . . . . . . . . . . . . . . . . 105 8 ld msop package . . . . . . . . . . . . . . . . . . . . . . . . 140 14 ld soic package . . . . . . . . . . . . . . . . . . . . . . . . 128 maximum junction temperature (plastic package) . . . . . . . 150c maximum storage temperature range . . . . . . . . . . . -65c to 150c maximum lead temperature (soldering 10s) . . . . . . . . . . . . 300c (lead tips only) operating conditions temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . -40c to 85c caution: stresses above those listed in ?a bsolute maximum ratings? may cause permanent damage to the device. this is a stress o nly rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied. note: 3. ja is measured with the component mounted on a high effective ther mal conductivity test board in free air. see tech brief tb379 f or details. electrical specifications test conditions: v cc = 4.5v to 5.5v; unless otherwise specified. typicals are at v cc = 5v, t a = 25c (note 4) parameter symbol test conditions temp (c) min typ max units dc characteristics driver differential v out (no load) v od1 full - - v cc v driver differential v out (with load) v od2 r l = 100 ? (rs-422) (figure 1a) full 2 2.9 - v r l = 54 ? (rs-485) (figure 1a) full 1.5 2.4 v cc v r l = 60 ? , -7v v cm 12v (figure 1b) full 1.5 2.6 - v change in magnitude of driver differential v out for complementary output states ? v od r l = 54 ? or 100 ? (figure 1a) full - 0.01 0.2 v driver common-mode v out v oc r l = 54 ? or 100 ? (figure 1a) full - 2.85 3 v change in magnitude of driver common-mode v out for complementary output states ? v oc r l = 54 ? or 100 ? (figure 1a) full - 0.01 0.1 v logic input high voltage v ih de, di, re full 2 - - v logic input low voltage v il de, di, re full - - 0.8 v di input hysteresis voltage v hys 25 - 100 - mv logic input current i in1 de, di, re full -2 - 2 a input current (a, b) i in2 de = 0v, v cc = 0v or 5.5v v in = 12v full - 70 125 a v in = -7v full -75 55 - a output leakage current (y, z) (full duplex versions only) i in3 re = 0v, de = 0v, v cc = 0v or 5.5v v in = 12v full - 7 125 a v in = -7v full -75 11 - a output leakage current (y, z) in shutdown mode (full duplex) i in3 re = v cc , de = 0v, v cc = 0v or 5.5v v in = 12v full - 0 20 a v in = -7v full -20 9 - a driver short-ci rcuit current, v o = high or low i osd1 de = v cc , -7v v y or v z 12v (note 6) full - - 250 ma receiver differential threshold voltage v th -7v v cm 12v full -200 -90 -50 mv receiver input hysteresis ? v th v cm = 0v 25 - 20 - mv ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
6 fn6085.6 september 12, 2005 receiver output high voltage v oh i o = -4ma, v id = -50mv full v cc - 1 4.6 - v receiver output low voltage v ol i o = -4ma, v id = -200mv full - 0.2 0.4 v three-state (high impedance) receiver output current i ozr 0.4v v o 2.4v full -1 0.03 1 a receiver input resistance r in -7v v cm 12v full 96 160 - k ? receiver short- circuit current i osr 0v v o v cc full 7- 85 ma supply current no-load supply current (note 5) i cc half duplex versions, de = v cc , re = x, di = 0v or v cc full - 560 700 a all versions, de = 0v, re = 0v, or full duplex versions, de = v cc , re = x. di = 0v or v cc full - 530 650 a shutdown supply current i shdn de = 0v, re = v cc , di = 0v or v cc full - 0.07 2 a esd performance rs-485 pins (a, y, b, z) human body model (hbm), pin to gnd 25 - 15 - kv all other pins hbm, per mil-std-883 method 3015 25 - 7-kv driver switching characteristics (115kbps versions; ISL83080E, isl83082e) driver differential output delay t plh, t phl r diff = 54 ? , c l = 100pf (figure 2) full 500 780 1300 ns driver differential output skew t skew r diff = 54 ? , c l = 100pf (figure 2) full - 40 100 ns driver differential rise or fall time t r , t f r diff = 54 ? , c l = 100pf (figure 2) full 667 1000 1500 ns maximum data rate f max c d = 820pf (figure 4, note 12) full 115 666 - kbps driver enable to output high t zh r l = 500 ? , c l = 100pf, sw = gnd (figure 3), (note 7) full - 278 1500 ns driver enable to output low t zl r l = 500 ? , c l = 100pf, sw = v cc (figure 3), (note 7) full - 35 1500 ns driver disable from output low t lz r l = 500 ? , c l = 15pf, sw = v cc (figure 3) full - 67 100 ns driver disable from output high t hz r l = 500 ? , c l = 15pf, sw = gnd (figure 3) full - 38 100 ns time to shutdown t shdn (notes 9, 12) full 60 160 600 ns driver enable from shutdown to output high t zh(shdn) r l = 500 ? , c l = 100pf, sw = gnd (figure 3), (notes 9, 10) full - 400 2000 ns driver enable from shutdown to output low t zl(shdn) r l = 500 ? , c l = 100pf, sw = v cc (figure 3), (notes 9, 10) full - 155 2000 ns driver switching characteristics (500kbps versions; isl83083e, isl83085e) driver differential output delay t plh, t phl r diff = 54 ? , c l = 100pf (figure 2) full 250 360 1000 ns driver differential output skew t skew r diff = 54 ? , c l = 100pf (figure 2) full - 20 100 ns driver differential rise or fall time t r , t f r diff = 54 ? , c l = 100pf (figure 2) full 200 475 750 ns maximum data rate f max c d = 820pf (figure 4, note 12) full 500 1000 - kbps driver enable to output high t zh r l = 500 ? , c l = 100pf, sw = gnd (figure 3), (note 7) full - 137 1000 ns driver enable to output low t zl r l = 500 ? , c l = 100pf, sw = v cc (figure 3), (note 7) full - 35 1000 ns driver disable from output low t lz r l = 500 ? , c l = 15pf, sw = v cc (figure 3) full - 65 100 ns electrical specifications test conditions: v cc = 4.5v to 5.5v; unless otherwise specified. typicals are at v cc = 5v, t a = 25c (note 4) (continued) parameter symbol test conditions temp (c) min typ max units ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
7 fn6085.6 september 12, 2005 driver disable from output high t hz r l = 500 ? , c l = 15pf, sw = gnd (figure 3) full - 38 100 ns time to shutdown t shdn (notes 9, 12) full 60 160 600 ns driver enable from shutdown to output high t zh(shdn) r l = 500 ? , c l = 100pf, sw = gnd (figure 3), (notes 9, 10) full - 260 1500 ns driver enable from shutdown to output low t zl(shdn) r l = 500 ? , c l = 100pf, sw = v cc (figure 3), (notes 9, 10) full - 155 1500 ns driver switching characteristics (10mbps versions; isl83086e, isl83088e) driver differential output delay t plh, t phl r diff = 54 ? , c l = 100pf (figure 2) full - 20 60 ns driver differential output skew t skew r diff = 54 ? , c l = 100pf (figure 2) full - 1 10 ns driver differential rise or fall time t r , t f r diff = 54 ? , c l = 100pf (figure 2) full - 13 25 ns maximum data rate f max c d = 470pf (figure 4, note 12) full 10 15 - mbps driver enable to output high t zh r l = 500 ? , c l = 100pf, sw = gnd (figure 3), (note 7) full - 35 150 ns driver enable to output low t zl r l = 500 ? , c l = 100pf, sw = v cc (figure 3), (note 7) full - 30 150 ns driver disable from output low t lz r l = 500 ? , c l = 15pf, sw = v cc (figure 3) full - 66 100 ns driver disable from output high t hz r l = 500 ? , c l = 15pf, sw = gnd (figure 3) full - 38 100 ns time to shutdown t shdn (notes 9, 12) full 60 160 600 ns driver enable from shutdown to output high t zh(shdn) r l = 500 ? , c l = 100pf, sw = gnd (figure 3), (notes 9, 10) full - 115 250 ns driver enable from shutdown to output low t zl(shdn) r l = 500 ? , c l = 100pf, sw = v cc (figure 3), (notes 9, 10) full - 84 250 ns receiver switching characteristics (115kbps and 500kbps versions; ISL83080E-isl83085e) maximum data rate f max (figure 5, note 12) full 0.5 10 - mbps receiver input to output delay t plh , t phl (figure 5) full - 100 150 ns receiver skew | t plh - t phl |t skd (figure 5) full - 7 10 ns receiver enable to output low t zl r l = 1k ? , c l = 15pf, sw = v cc (figure 6), (note 8) full - 10 50 ns receiver enable to output high t zh r l = 1k ? , c l = 15pf, sw = gnd (figure 6), (note 8) full - 10 50 ns receiver disable from output low t lz r l = 1k ? , c l = 15pf, sw = v cc (figure 6) full - 10 50 ns receiver disable from output high t hz r l = 1k ? , c l = 15pf, sw = gnd (figure 6) full - 10 50 ns time to shutdown t shdn (notes 9, 12) full 60 160 600 ns receiver enable from shutdown to output high t zh(shdn) r l = 1k ? , c l = 15pf, sw = gnd (figure 6), (notes 9, 11) full - 150 2000 ns receiver enable from shutdown to output low t zl(shdn) r l = 1k ? , c l = 15pf, sw = v cc (figure 6), (notes 9, 11) full - 150 2000 ns receiver switching characteristics (10mbps versions; isl83086e, isl83088e) maximum data rate f max (figure 5, note 12) full 10 15 - mbps receiver input to output delay t plh , t phl (figure 5) full - 70 125 ns receiver skew | t plh - t phl |t skd (figure 5) full - 0 10 ns receiver enable to output low t zl r l = 1k ? , c l = 15pf, sw = v cc (figure 6), (note 8) full - 10 30 ns electrical specifications test conditions: v cc = 4.5v to 5.5v; unless otherwise specified. typicals are at v cc = 5v, t a = 25c (note 4) (continued) parameter symbol test conditions temp (c) min typ max units ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
8 fn6085.6 september 12, 2005 receiver enable to output high t zh r l = 1k ? , c l = 15pf, sw = gnd (figure 6), (note 8) full - 10 30 ns receiver disable from output low t lz r l = 1k ? , c l = 15pf, sw = v cc (figure 6) full - 10 30 ns receiver disable from output high t hz r l = 1k ? , c l = 15pf, sw = gnd (figure 6) full - 10 30 ns time to shutdown t shdn (notes 9, 12) full 60 160 600 ns receiver enable from shutdown to output high t zh(shdn) r l = 1k ? , c l = 15pf, sw = gnd (figure 6), (notes 9, 11) full - 150 2000 ns receiver enable from shutdown to output low t zl(shdn) r l = 1k ? , c l = 15pf, sw = v cc (figure 6), (notes 9, 11) full - 150 2000 ns notes: 4. all currents into device pins are positiv e; all currents out of device pins are negat ive. all voltages are referenced to devi ce ground unless otherwise specified. 5. supply current specification is va lid for loaded drivers when de = 0v. 6. applies to peak current. see ?typical performance curves? for more information. 7. keep re = 0 to prevent the device from entering shdn. 8. the re signal high time must be short enough (typically <1 00ns) to prevent the device from entering shdn. 9. transceiver s are put into shutdown by bringing re high and de low. if the inputs are in this state for less than 60ns, the parts are guaranteed not to enter shutdown. if the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. s ee ?low-power shutdown mode? section. 10. keep re = vcc, and set the de signal low time >600ns to ensure that the device enters shdn. 11. set the re signal high time >600ns to ens ure that the device enters shdn. 12. guaranteed by characterization but not tested. test circuits and waveforms figure 1a. v od and v oc figure 1b. v od with common mode load figure 1. dc driver test circuits electrical specifications test conditions: v cc = 4.5v to 5.5v; unless otherwise specified. typicals are at v cc = 5v, t a = 25c (note 4) (continued) parameter symbol test conditions temp (c) min typ max units d de di v cc v od v oc r l /2 r l /2 z y d de di v cc v od 375 ? 375 ? z y r l = 60 ? v cm -7v to +12v ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
9 fn6085.6 september 12, 2005 figure 2a. test circuit figure 2b. measurement points figure 2. driver propagation delay and differential transition times figure 3a. test circuit figure 3b. measurement points figure 3. driver enable and disable times figure 4a. test circuit figure 4b. measurement points figure 4. driver data rate test circuits and waveforms (continued) d de di v cc signal generator c l = 100pf r diff z y c l = 100pf out (z) 3v 0v 1.5v 1.5v v oh v ol out (y) t plh t phl diff out (y - z) t r +v od -v od 90% 90% t f 10% 10% di skew = |t plh - t phl | d de di z y v cc gnd sw parameter output re di sw c l (pf) t hz y/z x 1/0 gnd 15 t lz y/z x 0/1 v cc 15 t zh y/z 0 (note 7) 1/0 gnd 100 t zl y/z 0 (note 7) 0/1 v cc 100 t zh(shdn) y/z 1 (note 10) 1/0 gnd 100 t zl(shdn) y/z 1 (note 10) 0/1 v cc 100 signal generator 500 ? c l out (y, z) 3v 0v 1.5v 1.5v v oh 0v v oh - 0.5v t hz out (y, z) v cc v ol v ol + 0.5v t lz de output high output low t zl , t zl(shdn) t zh , t zh(shdn) note 9 2.3v 2.3v note 9 note 9 d de di v cc signal generator z y c d v od + - 60 ? 3v 0v diff out (y - z) +v od -v od di 0v ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
10 fn6085.6 september 12, 2005 application information rs-485 and rs-422 are di fferential (balanced) data transmission standards for use in long haul or noisy environments. rs-422 is a su bset of rs-485, so rs-485 transceivers are also rs-422 compliant. rs-422 is a point- to-multipoint (multidrop) standard, which allows only one driver and up to 10 (assuming one unit load devices) receivers on each bus. rs-485 is a true multipoint standard, which allows up to 32 one unit load devices (any combination of drivers and receivers) on each bus. to allow for multipoint operation, the rs-485 spec requires that drivers must handle bus contention without sustaining any damage. another important advantage of rs-485 is the extended common mode range (cmr), which specifies that the driver outputs and receiver inputs withst and signals that range from +12v to -7v. rs-422 and rs-485 are intended for runs as long as 4000?, so the wide cmr is necessary to handle ground potential differences, as well as voltages induced in the cable by external fields. receiver features these devices utilize a differential input receiver for maximum noise immunity and common mode rejection. input sensitivity is 200mv, as required by the rs-422 and rs-485 specifications. receiver input resistance of 96k ? surpasses the rs-422 spec of 4k ? , and is eight times the rs-485 ?unit load (ul)? requirement of 12k ? minimum. thus, these products are known as ?one-eighth ul? transceivers, and there can be up to 256 of these devices on a network while still complying with the rs-485 loading spec. receiver inputs function with common mode voltages as great as 7v outside the power supplies (i.e., +12v and -7v), making them ideal for long networks where induced voltages are a realistic concern. all the receivers include a ?full fail-safe? function that guarantees a high level receiver output if the receiver inputs are unconnected (floating) or shorted. figure 5a. test circuit figure 5b. measurement points figure 5. receiver propagation delay and data rate figure 6a. test circuit figure 6b. measurement points figure 6. receiver enable and disable times test circuits and waveforms (continued) signal generator r ro re a b 0v 15pf ro +1.5v -1.5v t plh 0v 0v v cc 0v 1.5v 1.5v t phl a 1k ? v cc gnd sw parameter de a sw t hz 0 +1.5v gnd t lz 0 -1.5v v cc t zh (note 8) 0 +1.5v gnd t zl (note 8) 0 -1.5v v cc t zh(shdn) (note 11) 0 +1.5v gnd t zl(shdn) (note 11) 0 -1.5v v cc signal generator r ro re a b gnd 15pf ro 3v 0v 1.5v 1.5v v oh 0v 1.5v v oh - 0.5v t hz ro v cc v ol 1.5v v ol + 0.5v t lz re output high output low t zl , t zl(shdn) t zh , t zh(shdn) note 9 note 9 note 9 ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
11 fn6085.6 september 12, 2005 receivers easily meet the data rates supported by the corresponding driver, and all receiver outputs are three- statable via the active low re input. driver features the rs-485/422 driver is a differential output device that delivers at least 1.5v across a 54 ? load (rs-485), and at least 2v across a 100 ? load (rs-422). the drivers feature low propagation delay skew to maximize bit width, and to minimize emi. all drivers are three-statable via the active high de input. the 115kbps and 500kbps driver outputs are slew rate limited to minimize emi, and to minimize reflections in unterminated or improperly term inated networks. outputs of the isl83086e, isl83088e drivers are not limited, so faster output transition times allow dat a rates of at least 10mbps. hot plug function when a piece of equipment powers up, there is a period of time where the processor or asic driving the rs-485 control lines (de, re ) is unable to ensure that the rs-485 tx and rx outputs are kept disabled. if the equipment is connected to the bus, a driver activating prematurely during power up may crash the bus. to avoid this scenario, the isl83080, isl83082, isl83083, isl83085 versions incorporate a ?hot plug? function. circuitry monitoring v cc ensures that, during power up and power down, the tx and rx outputs remain disabled, regardless of the state of de and re , if v cc is less than ~3.4v. this gives the proc essor/asic a chance to stabilize and drive the rs-485 control lines to the proper states. esd protection all pins on these devices include class 3 human body model (hbm) esd protection structures, but the rs-485 pins (driver outputs and receiver inputs) incorporate advanced structures allowing them to survive esd events in excess of 15kv hbm. the rs-485 pins are particularly vulnerable to esd damage because they typically connect to an exposed port on the exterior of the finished product. simply touching the port pins, or connecting a cable, can cause an esd event that might destroy unprotected ics. these new esd structures prot ect the device whether or not it is powered up, protect without allowing any latchup mechanism to activate, and without degrading the rs-485 common mode range of -7v to +12v. this built-in esd protection eliminates the nee d for board level protection structures (e.g., transient suppression diodes), and the associated, undesirable capacitive load they present. data rate, cables, and terminations rs-485/422 are intended for network lengths up to 4000?, but the maximum system data rate decreases as the transmission length increases. devices operating at 10mbps are limited to lengths less than 100?, while the 115kbps versions can operate at full data rates with lengths of several thousand feet. twisted pair is the cable of choice for rs-485/422 networks. twisted pair cables tend to pick up noise and other electromagnetically induced voltages as common mode signals, which are effectively rejected by the differential receivers in these ics. proper termination is imperative, when using the 10mbps devices, to minimize reflections. short networks using the 115kbps versions need not be terminated, but, terminations are recommended unless power dissipation is an overriding concern. in point-to-point, or point-to-mu ltipoint (single driver on bus) networks, the main cable should be terminated in its characteristic impedance (typically 120 ? ) at the end farthest from the driver. in multi-receiver applications, stubs connecting receivers to the main cable should be kept as short as possible. multipoint (multi-driver) systems require that the main cable be terminated in its characteristic impedance at both ends. stubs connecting a transceiver to the main cable should be kept as short as possible. built-in driver overload protection as stated previously, the rs-485 spec requires that drivers survive worst case bus contentions undamaged. these devices meet this requirement via driver output short circuit current limits, and on-chip thermal shutdown circuitry. the driver output stages inco rporate short circuit current limiting circuitry which ensures that the output current never exceeds the rs-485 spec, even at the common mode voltage range extremes. additionally, these devices utilize a foldback circuit which reduces the short circuit current, and thus the power dissipation, w henever the contending voltage exceeds either supply. in the event of a major short circuit condition, devices also include a thermal shutdown feature that disables the drivers whenever the die temperature becomes excessive. this eliminates the power dissipation, allowing the die to cool. the drivers automatically re-enable after the die temperature drops about 15 degrees. if the c ontention persists, the thermal shutdown/re-enable cycle repeat s until the fault is cleared. receivers stay operational during thermal shutdown. figure 7. hot plug performance (ISL83080E) vs device without hot plug circuitry (isl83086e) time (40s/div) v cc receiver output (v) driver y output (v) 2.5 5 2.5 5 v cc (v) r l = 1k ? ro 0 2.5 5 0 0 a/y r l = 1k ? ISL83080E ISL83080E 3.2v 3.4v di = v cc ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
12 fn6085.6 september 12, 2005 low power shutdown mode these cmos transceivers all use a fraction of the power required by their bipolar counterparts, but they also include a shutdown feature that reduces the already low quiescent i cc to a 70na trickle. these devices enter shutdown whenever the receiver and driver are simultaneously disabled (re =v cc and de = gnd) for a period of at least 600ns. disabling both the driver and the receiver for less than 60ns guarantees that the transceiver will not enter shutdown. note that receiver and driver enable times increase when the transceiver enables from shutdown. refer to notes 7-11, at the end of the electrical specification table, for more information. typical performance curves v cc = 5v, t a = 25c; unless otherwise specified figure 8. driver output current vs differential output voltage figure 9. driver differential output voltage vs temperature figure 10. driver output current vs short circuit voltage figure 11. supply current vs temperature differential output voltage (v) driver output current (ma) 012345 0 10 20 30 40 50 60 70 80 90 -40 0 50 85 temperature (c) differential output voltage (v) -25 25 75 2 2.2 2.4 2.6 2.8 3 3.2 3.4 r diff = 54 ? r diff = 100 ? output voltage (v) -7 -6 -4 -2 0 2 4 6 8 10 12 output current (ma) -50 0 50 100 150 200 -100 -150 y or z = high y or z = low isl8308xe ISL83080E thru isl83085e isl83086e/88e -40 0 50 85 temperature (c) i cc ( a) -25 25 75 500 510 520 530 540 550 560 half duplex, de = v cc , re = x half duplex, de = gnd, re = gnd full duplex, de = x, re = gnd ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
13 fn6085.6 september 12, 2005 figure 12. driver differential propagation delay vs temperature (ISL83080E, isl83082e) figure 13. driver differential skew vs temperature (ISL83080E, isl83082e) figure 14. driver differential propagation delay vs temperature (isl83083e, isl83085e) figure 15. driver differential skew vs temperature (isl83083e, isl83085e) figure 16. driver differential propagation delay vs temperature (isl83086e, isl83088e) figure 17. driver differential skew vs temperature (isl83086e, isl83088e) typical performance curves v cc = 5v, t a = 25c; unless otherwise specified (continued) -40 0 50 85 temperature (c) -25 25 75 propagation delay (ns) 740 760 780 800 820 840 860 880 t plh t phl 30 35 40 45 50 55 60 -40 0 50 85 temperature (c) skew (ns) -25 25 75 |cross pt. of y & z - cross pt. of y & z | -40 0 50 85 temperature (c) -25 25 75 propagation delay (ns) 340 350 360 370 380 390 400 t plh t phl -40 0 50 85 temperature (c) skew (ns) -25 25 75 17 18 19 20 21 22 23 24 25 26 27 |cross pt. of y & z - cross pt. of y & z | -40 0 50 85 temperature (c) -25 25 75 propagation delay (ns) t plh t phl 15 16 17 18 19 20 -40 0 50 85 temperature (c) skew (ns) -25 25 75 |cross pt. of y & z - cross pt. of y & z | 0.5 0.55 0.6 0.65 0.7 ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
14 fn6085.6 september 12, 2005 figure 18. driver and receiver waveforms, low to high (ISL83080E, isl83082e) figure 19. driver and receiver waveforms, high to low (ISL83080E, isl83082e) figure 20. driver and receiver waveforms, low to high (isl83083e, isl83085e) figure 21. driver and receiver waveforms, high to low (isl83083e, isl83085e) figure 22. driver and receiver waveforms, low to high (isl83086e, isl83088e) figure 23. driver and receiver waveforms, high to low (isl83086e, isl83088e) typical performance curves v cc = 5v, t a = 25c; unless otherwise specified (continued) 0 3 4 1 2 time (400ns/div) receiver output (v) r diff = 54 ? , c l = 100pf 0 5 driver output (v) 0 5 driver input (v) di ro a/y b/z 0 3 4 1 2 time (400ns/div) di receiver output (v) driver output (v) 0 5 0 5 driver input (v) r diff = 54 ? , c l = 100pf b/z a/y ro 0 3 4 1 2 time (200ns/div) receiver output (v) r diff = 54 ? , c l = 100pf 0 5 driver output (v) 0 5 driver input (v) di ro a/y b/z 0 3 4 1 2 time (200ns/div) di receiver output (v) driver output (v) 0 5 0 5 driver input (v) r diff = 54 ? , c l = 100pf b/z a/y ro 0 3 4 1 2 time (20ns/div) receiver output (v) r diff = 54 ? , c l = 100pf 0 5 driver output (v) 0 5 driver input (v) di ro a/y b/z 0 3 4 1 2 time (20ns/div) di receiver output (v) driver output (v) 0 5 0 5 driver input (v) r diff = 54 ? , c l = 100pf b/z a/y ro ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
15 fn6085.6 september 12, 2005 figure 24. receiver output current vs receiver output voltage die characteristics substrate potential (powered up): gnd transistor count: 525 process: si gate bicmos typical performance curves v cc = 5v, t a = 25c; unless otherwise specified (continued) receiver output voltage (v) receiver output current (ma) 012345 0 5 10 15 20 25 30 35 40 v oh , 25c v oh , 85c v ol , 25c v ol , 85c ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
16 fn6085.6 september 12, 2005 ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e mini small outline plastic packages (msop) notes: 1. these package dimensions are wi thin allowable dimensions of jedec mo-187ba. 2. dimensioning and tolerancing per ansi y14.5m - 1994. 3. dimension ?d? does not include mo ld flash, protrusions or gate burrs and are measured at datum plane. mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. dimension ?e1? does not includ e interlead flash or protrusions and are measured at datum plane. interlead flash and protrusions shall not exceed 0.15mm (0.006 inch) per side. 5. formed leads shall be planar wi th respect to one another within 0.10mm (0.004) at seating plane. 6. ?l? is the length of terminal for soldering to a substrate. 7. ?n? is the number of terminal positions. 8. terminal numbers are sh own for reference only. 9. dimension ?b? does not inclu de dambar protrusion. allowable dambar protrusion shall be 0.08mm (0.003 inch) total in excess of ?b? dimension at maximum ma terial condition. minimum space between protrusion and adjacent lead is 0.07mm (0.0027 inch). 10. datums and to be determined at datum plane . 11. controlling dimension: millimeter. converted inch dimen- sions are for reference only. l 0.25 (0.010) l1 r1 r 4x 4x gauge plane seating plane e e1 n 12 top view index area -c- -b- 0.20 (0.008) a b c seating plane 0.20 (0.008) c 0.10 (0.004) c -a- -h- side view b e d a a1 a2 -b- end view 0.20 (0.008) c d e 1 c l c a - h - -a - - b - - h - m8.118 (jedec mo-187aa) 8 lead mini small outline plastic package symbol inches millimeters notes min max min max a 0.037 0.043 0.94 1.10 - a1 0.002 0.006 0.05 0.15 - a2 0.030 0.037 0.75 0.95 - b 0.010 0.014 0.25 0.36 9 c 0.004 0.008 0.09 0.20 - d 0.116 0.120 2.95 3.05 3 e1 0.116 0.120 2.95 3.05 4 e 0.026 bsc 0.65 bsc - e 0.187 0.199 4.75 5.05 - l 0.016 0.028 0.40 0.70 6 l1 0.037 ref 0.95 ref - n8 87 r 0.003 - 0.07 - - r1 0.003 - 0.07 - - 05 o 15 o 5 o 15 o - 0 o 6 o 0 o 6 o - rev. 2 01/03
17 fn6085.6 september 12, 2005 small outline plastic packages (soic) notes: 1. symbols are defined in the ?mo series symbol list? in section 2.2 of publication number 95. 2. dimensioning and tolerancing per ansi y14.5m - 1982. 3. dimension ?d? does not include mold flash, protrusions or gate burrs. mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. dimension ?e? does not include inte rlead flash or prot rusions. interlead flash and protrusions shall not ex ceed 0.25mm (0.010 inch) per side. 5. the chamfer on the body is optional. if it is not present, a visual index feature must be located within the crosshatched area. 6. ?l? is the length of terminal for soldering to a substrate. 7. ?n? is the number of terminal positions. 8. terminal numbers are shown for reference only. 9. the lead width ?b?, as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 10. controlling dimension: millimete r. converted inch dimensions are not necessarily exact. index area e d n 123 -b- 0.25(0.010) c a m bs e -a- l b m -c- a1 a seating plane 0.10(0.004) h x 45 o c h 0.25(0.010) b m m m14.15 (jedec ms-012-ab issue c) 14 lead narrow body small outline plastic package symbol inches millimeters notes min max min max a 0.0532 0.0688 1.35 1.75 - a1 0.0040 0.0098 0.10 0.25 - b 0.013 0.020 0.33 0.51 9 c 0.0075 0.0098 0.19 0.25 - d 0.3367 0.3444 8.55 8.75 3 e 0.1497 0.1574 3.80 4.00 4 e 0.050 bsc 1.27 bsc - h 0.2284 0.2440 5.80 6.20 - h 0.0099 0.0196 0.25 0.50 5 l 0.016 0.050 0.40 1.27 6 n14 147 0 o 8 o 0 o 8 o - rev. 0 12/93 ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e
18 all intersil u.s. products are manufactured, asse mbled and tested utilizing iso9000 quality systems. intersil corporation?s quality certifications ca n be viewed at www.intersil.com/design/quality intersil products are sold by description only. intersil corpor ation reserves the right to make changes in circuit design, soft ware and/or specifications at any time without notice. accordingly, the reader is cautioned to verify that data sheets are current before placing orders. information furnishe d by intersil is believed to be accurate and reliable. however, no responsibility is assumed by intersil or its subsidiaries for its use; nor for any infringements of paten ts or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent or patent rights of intersil or its subsidiari es. for information regarding intersil corporation and its products, see www.intersil.com fn6085.6 september 12, 2005 small outline plastic packages (soic) index area e d n 123 -b- 0.25(0.010) c a m bs e -a- l b m -c- a1 a seating plane 0.10(0.004) h x 45 o c h 0.25(0.010) b m m notes: 1. symbols are defined in the ?mo series symbol list? in section 2.2 of publication number 95. 2. dimensioning and tolerancing per ansi y14.5m - 1982. 3. dimension ?d? does not include mold flash, protrusions or gate burrs. mold flash, protrusion and gate burrs shall not exceed 0.15mm (0.006 inch) per side. 4. dimension ?e? does not include in terlead flash or protrusions. inter- lead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 5. the chamfer on the body is optional. if it is not present, a visual index feature must be located within the crosshatched area. 6. ?l? is the length of terminal for soldering to a substrate. 7. ?n? is the number of terminal positions. 8. terminal numbers are shown for reference only. 9. the lead width ?b?, as measured 0.36mm (0.014 inch) or greater above the seating plane, shall not exceed a maximum value of 0.61mm (0.024 inch). 10. controlling dimension: millimete r. converted inch dimensions are not necessarily exact. m8.15 (jedec ms-012-aa issue c) 8 lead narrow body small outline plastic package symbol inches millimeters notes min max min max a 0.0532 0.0688 1.35 1.75 - a1 0.0040 0.0098 0.10 0.25 - b 0.013 0.020 0.33 0.51 9 c 0.0075 0.0098 0.19 0.25 - d 0.1890 0.1968 4.80 5.00 3 e 0.1497 0.1574 3.80 4.00 4 e 0.050 bsc 1.27 bsc - h 0.2284 0.2440 5.80 6.20 - h 0.0099 0.0196 0.25 0.50 5 l 0.016 0.050 0.40 1.27 6 n8 87 0 o 8 o 0 o 8 o - rev. 0 12/93 ISL83080E, isl83082e, isl83083e , isl83085e, isl83086e, isl83088e

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