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1 60v fault protected, 3.3v to 5v, 20v common mode range, rs-485/rs-422 transceivers with cable invert and 15kv esd isl32450e, ISL32452E, isl324 53e, isl32455e, isl32457e the isl32450e through isl32457e are 3.3v to 5v powered, fault protected, extended common mode range differential transceivers for balanced communication. the rs-485 bus pins (driver outputs and receiver inputs) are protected against overvoltages up to 60v, and against 15kv esd strikes. these transceivers operate in environments with common mode voltages up to 20v (exceeds the rs-485 requirement), making this rs-485 family one of the more robust on the market. transmitters are rs-485 compliant with v cc 4.5v and deliver a 1.1v differential output volt age into the rs-485 specified 54 ? load even with v cc =3v. receiver (rx) inputs feature a ?full fail-safe? design, which ensures a logic-high rx output if rx inputs are floating, shorted, or on a terminated but undriven (idle) bus. rx full fa il-safe operation is maintained even when the rx in put polarity is switched (cable invert function on isl32457e). the isl32457e includes a cable invert function that reverses the polarity of the rx and tx bu s pins in case the cable is misconnected during installation. see table 1 on page 2 for key fe atures and configurations by device number. related literature ?see fn7784 , ?isl32470e, isl32472e, isl32475e, isl32478e: fault protected, extended common mode range, rs-485/rs-422 transceivers with 16.5kv esd? features ? fault protected rs-485 bus pins . . . . . . . . . . . . . . up to 60v ? extended common mode range . . . . . . . . . . . . . . . . . . . 20v larger than required for rs-485 ? 15kv hbm esd protection on rs-485 bus pins ? wide supply range . . . . . . . . . . . . . . . . . . . . . . . . . 3v to 5.5v ? cable invert pin (isl32457e only) corrects for reversed cable connections while maintaining rx full fail-safe functionality ? 1/4 unit load for up to 128 devices on the bus ? high transient overvoltage tolerance . . . . . . . . . . . . . . . 80v ? full fail-safe (open, short, terminated) rs-485 receivers ? choice of rs-485 data rates . . . . . . . . . . . . 250kbps or 1mbps ? low quiescent supply current . . . . . . . . . . . . . . . . . . . 2.1ma ultra low shutdown supply current . . . . . . . . . . . . . . . 10a ? pb-free (rohs compliant) applications ? utility meters/automated meter reading systems ? air conditioning systems ?security camera networks ? building lighting and environmental control systems ? industrial/process control networks figure 1. exceptional isl32453e rx operates at >1mbps even with 20v common mode voltage figure 2. transceivers deli ver superior common mode range vs standard rs-485 devices time (200ns/div) voltage (v) 0 5 10 15 20 b a ro v cc = 3v vid = 1v 2mbps isl3245xe common mode range (v) standard rs-485 transceiver -20 -7 0 12 20 caution: these devices are sensitive to electrostatic discharge; follow proper ic handling procedures. 1-888-intersil or 1-888-468-3774 | copyright intersil americas inc. 2012. all rights reserved intersil (and design) is a trademark owned by intersil corporation or one of its subsidiaries. all other trademarks mentioned are the property of their respective owners. february 20, 2012 fn7921.0 free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 2 fn7921.0 february 20, 2012 table 1. summary of features part number half/full duplex data rate (mbps) slew-rate limited? en pins? hot plug cable invert (inv) pin? quiescent i cc (ma) low power shdn? pin count isl32450e full 0.25 yes yes no no 2.1 yes 10, 14 ISL32452E half 0.25 yes yes no no 2.1 yes 8 isl32453e full 1 yes yes no no 2.1 yes 10, 14 isl32455e half 1 yes yes no no 2.1 yes 8 isl32457e half 0.25 yes tx only no yes 2.1 no 8 ordering information part number (notes 1, 2, 3) part marking temp. range (c) package (pb-free) pkg. dwg. # isl32450eibz isl32450 eibz -40 to +85 14 ld soic m14.15 isl32450eiuz 2450e -40 to +85 10 ld msop m10.118 ISL32452Eibz 32452 eibz -40 to +85 8 ld soic m8.15 ISL32452Eiuz 2452e -40 to +85 8 ld msop m8.118 isl32453eibz isl32453 eibz -40 to +85 14 ld soic m14.15 isl32453eiuz 2453e -40 to +85 10 ld msop m10.118 isl32455eibz 32455 eibz -40 to +85 8 ld soic m8.15 isl32455eiuz 2455e -40 to +85 8 ld msop m8.118 isl32457eibz 32457 eibz -40 to +85 8 ld soic m8.15 isl32457eiuz 2457e -40 to +85 8 ld msop m8.118 notes: 1. add ?-t*? suffix for tape and reel. please refer to tech brief tb347 for details on reel specifications. 2. these intersil pb-free plastic packaged products employ spec ial pb-free material sets, molding compounds/die attach materials , and 100% matte tin plate plus anneal (e3 termination finish , which is rohs compliant and compatible wi th both snpb and pb-free soldering opera tions). intersil pb-free products are msl classified at pb-fr ee peak reflow temperatures that meet or exceed the pb-free requirements of ipc/jed ec j std-020. 3. for moisture sensitivity level (msl), please see device information pages for isl32450e , ISL32452E , isl32453e, isl32455e, isl32457e . for more information on msl please see tech brief tb363 . free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 3 fn7921.0 february 20, 2012 pin configurations isl32450e, isl32453e (14 ld soic) top view isl32450e, isl32453e (10 ld msop) top view ISL32452E, isl32455e (8 ld soic, 8 ld msop) top view isl32457e (8 ld soic, 8 ld msop) top view note: evaluate creepage and clearance requirements at your maximu m fault voltage before using small pitch packages (e.g., msop). 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 ro re de di gnd v cc a b z y 1 2 3 4 5 10 9 8 7 6 d r ro re de di 1 2 3 4 8 7 6 5 v cc b/z a/y gnd d r ro inv de di 1 2 3 4 8 7 6 5 v cc b/z a/y gnd d r truth tables transmitting inputs outputs re de di inv (note 4) y z x11 0 1 0 x10 0 0 1 x11 1 0 1 x10 1 1 0 0 0 x x high-z high-z 10x x high-z (note 5) high-z (note 5) notes: 4. parts without the inv pin follow the rows with inv = ?0? and ?x?. 5. low power shutdown mode (see notes 14 and 19). receiving inputs output re (note 19) de (half duplex) de (full duplex) a-b inv (note 4) ro 00 x -0.01v 0 1 00 x -0.2v 0 0 00 x 0.01v 1 1 00 x 0.2v 1 0 00 xinputs open or shorted x1 10 0 x xhigh-z (note 5) 11 1 x xhigh-z free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 4 fn7921.0 february 20, 2012 pin descriptions pin name isl32450e, isl32453e, (14 ld soic) pin # isl32450e, isl32453e, (10 ld msop) pin # ISL32452E, isl32455e (8 ld soic, 8 ld msop) pin # isl32457e (8 ld soic, 8 ld msop) pin # function ro 2 1 1 1 receiver output. for parts without the cable invert function - or if inv is low - then: if a - b -10mv, ro is high; if a - b -200mv, ro is low. if inv is high, then: if b - a -10mv, ro is high; if b - a -200mv, ro is low. in all cases, ro = high if a and b are unconnected (floating), or shorted together, or connected to an undriven, terminated bus (i.e., rx is always failsafe open, shorted, and idle, even if polarity is inverted). re 3 2 2 n/a receiver output enable. ro is enabled when re is low; ro is high impedance when re is high. internally pulled low. de 4 3 3 3 driver output enable. the driver outputs, y and z, are enabled by bringing de high, and they are high impedance when de is low. internally pulled high. di 5 4 4 4 driver input. for parts without the cable invert function - or if inv is low - a low on di forces output y low and output z high, while a high on di forces output y high and output z low. the output states, relative to di, invert if inv is high. gnd 6, 7 5 5 5 ground connection. a/y n/a n/a 6 6 60v fault protected and 15kv esd protected rs-485/rs-422 i/o pin. for parts without the cable invert function - or if inv is low - a/y is the non-inverting receiver input and non-inverting driver output. if inv is high, a/y is the inverting receiver input and the inverting driver output. pin is an input if de = 0; pin is an output if de = 1. b/z n/a n/a 7 7 60v fault protected and 15kv esd protected rs-485/rs-422 i/o pin. for parts without the cable invert function - or if inv is low - b/z is the inverting receiver input and inverting driver output. if inv is high, b/z is the non-inverting receiver input and the non-inverting driver output. pin is an input if de = 0; pin is an output if de = 1. a 12 9 n/a n/a 60v fault protected and 15kv esd protected rs-485/rs-422 non-inverting receiver input. b 11 8 n/a n/a 60v fault protected and 15kv esd protected rs-485/rs-422 inverting receiver input. y 9 6 n/a n/a 60v fault protected and 15kv esd protected rs-485/rs-422 non-inverting driver output. z 10 7 n/a n/a 60v fault protected and 15kv esd protected rs-485/rs-422 inverting driver output. v cc 14 10 8 8 system power supply input (3v to 5.5v). inv n/a n/a n/a 2 receiver and driver cable invert (p olarity selection) inpu t. when driven high this pin swaps the polarity of the driver output and receiver input pins. if unconnected (floating) or connected lo w, normal rs-485 polarity conventions apply. internally pulled low. nc 1, 8, 13 n/a n/a n/a no internal connection. free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 5 fn7921.0 february 20, 2012 typical operating circuits isl32450e, isl32453e full duplex network ISL32452E, isl32455e half duplex network isl32457e half duplex network using cable invert function 0.1f + d r 12 11 10 9 14 2 3 4 5 6, 7 v cc gnd ro re de di a b y z +3.3v 0.1f + d r 12 11 10 9 14 2 3 4 5 6, 7 v cc gnd ro re de di a b y z +3.3v r t r t soic pinout shown 0.1f + d r 7 6 8 1 2 3 4 5 v cc gnd ro re de di a/y b/z +3.3v 0.1f + d r 6 7 8 1 2 3 4 5 v cc gnd ro re de di a/y b/z +3.3v r t r t 0.1f + d r 6 7 8 1 3 4 5 v cc gnd ro de di b/z a/y +3.3v r t r t inv 2 0.1f + d r 7 6 8 1 3 4 5 v cc gnd ro de di a/y b/z +3.3v inv 2 the ic on the left has the cable connections swapped, so the inv pin is strapped high to invert the rx and tx polarity free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 6 fn7921.0 february 20, 2012 absolute maximum rating s thermal information v cc to ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7v input voltages di, de, re , inv. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3v to v cc + 0.3v input/output voltages a/y, b/z, a, b, y, z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60v a/y, b/z, a, b, y, z (transient pulse through 100 , note 6) . . . . . . . . . . . . . . . . . . . 80v ro. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3v to (v cc +0.3v) short circuit duration y, z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . indefinite esd rating . . . . . . . . . . . . . . . . . . . . . . . . . . . see ?electrical specifications? latch-up (per jesd78, level 2, class a) . . . . . . . . . . . . . . . . . . . . . +125c thermal resistance (typical) ja (c/w) jc (c/w) 8 ld soic package (notes 7, 8) . . . . . . . . . . 108 47 8 ld msop package (notes 7, 8) . . . . . . . . . 140 40 10 ld msop package (notes 7, 8) . . . . . . . . 135 50 14 ld soic package (notes 7, 8) . . . . . . . . . 88 39 maximum junction temperature (plastic package). . . . . . . . . . . . . . . +150c maximum storage temperature range . . . . . . . . . . . . . . . -65c to +150c pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . see link below http://www.intersil.com/ pbfree/pb-freereflow.asp recommended operating conditions supply voltage (v cc ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3v or 5v temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40c to +85c bus pin common mode voltage range. . . . . . . . . . . . . . . . . . -20v to +20v caution: do not operate at or near the maximum ratings listed for extended periods of time. exposure to such conditions may adv ersely impact product reliability and result in failures not covered by warranty. notes: 6. tested according to tia/eia-485-a, section 4.2.6 (80v for 15s at a 1% duty cycle). 7. ja is measured with the component mounted on a high effective thermal conductivity test board in free air. see tech brief tb379 for details. 8. for jc , the ?case temp? location is taken at the package top center. electrical specifications test conditions: v cc = 3v to 3.6v and 4.5v to 5.5v, unless otherwise specified. typicals are at the worst case of v cc =5v or v cc =3.3v, t a = +25c (note 9). boldface limits apply over the oper ating temperature range, -40c to +85c. parameter symbol test conditions temp (c) min (note 17) typ max (note 17) units dc characteristics driver differential v out (no load) v od1 full - - v cc v driver differential v out (loaded, figure 3a) v od2 r l = 100 ? (rs-422), v cc 4.5v full 2 3- v r l = 54 ? (rs-485) v cc 4.5v full 1.7 2.3 v cc v v cc 3v full 1.1 1.3 v cc v change in magnitude of driver differential v out for complementary output states v od r l = 54 ? or 100 ? (figure 3a) full - - 0.2 v driver differential v out with common mode load (figure 3b) v od3 r l = 60 ? , -20v v cm 20v, v cc 4.5v full 1.5 - - v driver common-mode v out (figure 3a) v oc r l = 54 ? or 100 ? full -1 - 3 v change in magnitude of driver common-mode v out for complementary output states v oc r l = 54 ? or 100 ? (figure 3a) full - - 0.2 v driver short-circuit current i osd de = v cc , -20v v o 20v (note 11) full -250 - 250 ma i osd1 at first fold-back, 24v v o -24v full -83 - 83 ma i osd2 at second fold-back, 35v v o -35v full -13 - 13 ma logic input high voltage v ih de, di, re , inv (see figure 25) full 2.35 --v logic input low voltage v il de, di, re , inv full - - 0.8 v logic input current i in1 di full -1 - 1 a de, re , inv full -15 6 15 a free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 7 fn7921.0 february 20, 2012 input/output current (a/y, b/z) i in2 de = 0v, v cc =0v or 3.6v or 5.5v v in = 12v full - - 250 a v in = -7v full -200 --a v in = 20v full -800 - 850 a v in = 60v, (note 18) full -6 - 6 ma input current (a, b) (full duplex versions only) i in3 v cc = 0v or 3.6v or 5.5v v in = 12v full - - 125 a v in = -7v full -100 --a v in = 20v full -500 - 500 a v in = 60v, (note 18) full -3 - 3 ma output leakage current (y, z) (full duplex versions only) i ozd re = 0v, de = 0v, v cc = 0v or 3.6v or 5.5v v in = 12v full - - 200 a v in = -7v full -100 --a v in = 20v full -500 - 500 a v in = 60v, (note 18) full -3 - 3 ma receiver differential threshold voltage v th -20v v cm 20v, (for isl32457e only, a-b if inv = 0; b-a if inv = 1) v cc 3.6v full -200 -120 -10 mv v cc 4.5v full -250 -180 -10 mv receiver input hysteresis v th -20v v cm 20v +25 - 30 - mv receiver output high voltage v oh1 v id = -10mv i o = -4ma, v cc 3v full 2.4 --v v oh2 i o = -8ma, v cc 4.5v full 2.4 --v receiver output low voltage v ol i o = 4ma, v cc 3v , v id = -200mv full - - 0.4 v i o = 5ma, v cc 4.5v , v id = -250mv full - - 0.4 v three-state (high impedance) receiver output current (note 19) i ozr 0v v o v cc full -1 0.01 1 a receiver short-circuit current i osr 0v v o v cc full - - 115 ma supply current no-load supply current (note 10) i cc de = v cc , re =0v or v cc , di = 0v or v cc full - 2.1 4.5 ma shutdown supply current (note 19) i shdn de = 0v, re = v cc , di = 0v or v cc full - 10 35 a esd performance all pins human body model (tested per jesd22-a114e) +25 - 8 - kv machine model (tested per jesd22-a115-a) +25 - 700 - v rs-485 pins (a, b, y, z, a/y, b/z) human body model, from bus pins to gnd full duplex +25 - 15 - kv half duplex +25 - 16.5 - kv driver switching characteristics (250kbps versions; isl32450e, ISL32452E, isl32457e) driver differential output delay t plh, t phl r d = 54 ? , c d = 50pf (figure 4) full - 280 1000 ns driver differential output skew t skew r d = 54 ? , c d = 50pf (figure 4) full - 4 100 ns driver differential rise or fall time t r , t f r d = 54 ? , c d = 50pf (figure 4) full 250 650 1500 ns maximum data rate f max c d = 820pf (figure 6) full 250 - - kbps driver enable to output high t zh sw = gnd (figure 5), (note 12) full - - 1600 ns electrical specifications test conditions: v cc = 3v to 3.6v and 4.5v to 5.5v, unless otherwise specified. typicals are at the worst case of v cc =5v or v cc =3.3v, t a = +25c (note 9). boldface limits apply over the oper ating temperature range, -40c to +85c. (continued) parameter symbol test conditions temp (c) min (note 17) typ max (note 17) units free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 8 fn7921.0 february 20, 2012 driver enable to output low t zl sw = v cc (figure 5), (note 12) full - - 1600 ns driver disable from output low t lz sw = v cc (figure 5) full - - 300 ns driver disable from output high t hz sw = gnd (figure 5) full - - 300 ns time to shutdown t shdn (notes 14, 19) full 60 160 600 ns driver enable from shutdown to output high t zh(shdn) sw = gnd (figure 5), (notes 14, 15, 19) full - - 3000 ns driver enable from shutdown to output low t zl(shdn) sw = v cc (figure 5), (notes 14, 15, 19) full - - 3000 ns driver switching characteristics (1mbps versions; isl32453e, isl32455e) driver differential output delay t plh, t phl r d = 54 ? , c d = 50pf (figure 4) full - 70 200 ns driver differential output skew t skew r d = 54 ? , c d = 50pf (figure 4) full - 4 25 ns driver differential rise or fall time t r , t f r d = 54 ? , c d = 50pf (figure 4) full 50 130 300 ns maximum data rate f max c d = 820pf (figure 6) full 1 - - mbps driver enable to output high t zh sw = gnd (figure 5), (note 12) full - - 300 ns driver enable to output low t zl sw = v cc (figure 5), (note 12) full - - 300 ns driver disable from output low t lz sw = v cc (figure 5) full - - 300 ns driver disable from output high t hz sw = gnd (figure 5) full - - 300 ns time to shutdown t shdn (note 14) full 60 160 600 ns driver enable from shutdown to output high t zh(shdn) sw = gnd (figure 5), (notes 14, 15) full - - 3000 ns driver enable from shutdown to output low t zl(shdn) sw = v cc (figure 5), (notes 14, 15) full - - 3000 ns receiver switching characteristics (250kbps versions; isl32450e, ISL32452E, isl32457e) maximum data rate f max (figure 7) full 250 - - kbps receiver input to output delay t plh , t phl (figure 7) full - 240 325 ns receiver skew |t plh - t phl |t skd (figure 7) full - 6 25 ns receiver enable to output low t zl r l = 1k ? , c l = 15pf, sw = v cc (figure 8), (notes 13, 19) full - - 80 ns receiver enable to output high t zh r l = 1k ? , c l = 15pf, sw = gnd (figure 8), (notes 13, 19) full - - 80 ns receiver disable from output low t lz r l = 1k ? , c l = 15pf, sw = v cc (figure 8), (note 19) full - - 80 ns receiver disable from output high t hz r l = 1k ? , c l = 15pf, sw = gnd (figure 8), (note 19) full - - 80 ns time to shutdown t shdn (notes 14, 19) full 60 160 600 ns receiver enable from shutdown to output high t zh(shdn) r l = 1k ? , c l = 15pf, sw = gnd (figure 8), (notes 14, 16, 19) full - - 2500 ns receiver enable from shutdown to output low t zl(shdn) r l = 1k ? , c l = 15pf, sw = v cc (figure 8), (notes 14, 16, 19) full - - 2500 ns receiver switching characteristics (1mbps versions; isl32453e, isl32455e) maximum data rate f max (figure 7) full 1 - - mbps receiver input to output delay t plh , t phl (figure 7) full - 115 200 ns electrical specifications test conditions: v cc = 3v to 3.6v and 4.5v to 5.5v, unless otherwise specified. typicals are at the worst case of v cc =5v or v cc =3.3v, t a = +25c (note 9). boldface limits apply over the oper ating temperature range, -40c to +85c. (continued) parameter symbol test conditions temp (c) min (note 17) typ max (note 17) units free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 9 fn7921.0 february 20, 2012 receiver skew |t plh - t phl |t skd (figure 7) full - 4 20 ns receiver enable to output low t zl r l = 1k ? , c l = 15pf, sw = v cc (figure 8), (note 13) full - - 80 ns receiver enable to output high t zh r l = 1k ? , c l = 15pf, sw = gnd (figure 8), (note 13) full - - 80 ns receiver disable from output low t lz r l = 1k ? , c l = 15pf, sw = v cc (figure 8) full - - 80 ns receiver disable from output high t hz r l = 1k ? , c l = 15pf, sw = gnd (figure 8) full - - 80 ns time to shutdown t shdn (note 14) full 60 160 600 ns receiver enable from shutdown to output high t zh(shdn) r l = 1k ? , c l = 15pf, sw = gnd (figure 8), (notes 14, 16) full - - 2500 ns receiver enable from shutdown to output low t zl(shdn) r l = 1k ? , c l = 15pf, sw = v cc (figure 8), (notes 14, 16) full - - 2500 ns notes: 9. all currents into device pins are positive; all currents out of device pins are negative. all voltages are referenced to devi ce ground unless otherwise specified. 10. supply current specification is valid for loaded drivers when de = 0v. 11. applies to peak current. see ?typical performanc e curves? beginning on page 14 for more information. 12. keep re = 0 to prevent the device from entering shdn (does not apply to the isl32457e). 13. the re signal high time must be short enough (typically <100ns) to prevent the device from entering shdn. 14. transceivers 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. see ?low power shutdown mode? on page 13. 15. keep re = vcc, and set the de signal low time >600ns to ensure that the device enters shdn. 16. set the re signal high time >600ns to ensu re that the device enters shdn. 17. compliance to data sheet limits is assu red by one or more methods: production test, characterization and/or design. 18. see ?caution? statement below the ?recommended operating conditions? on page 6. 19. does not apply to the isl32457e. the isl32457e has no rx enable function, and thus no shdn function. test circuits and waveforms figure 3a. v od and v oc figure 3b. v od with common mode load figure 3. dc driver test circuits electrical specifications test conditions: v cc = 3v to 3.6v and 4.5v to 5.5v, unless otherwise specified. typicals are at the worst case of v cc =5v or v cc =3.3v, t a = +25c (note 9). boldface limits apply over the oper ating temperature range, -40c to +85c. (continued) parameter symbol test conditions temp (c) min (note 17) typ max (note 17) units d de di v cc v od v oc r l /2 r l /2 z y d de di v od 375 ? 375 ? z y v cm v cc r l /2 r l /2 free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 10 fn7921.0 february 20, 2012 figure 4a. test circuit figure 4b. measurement points figure 4. driver propagation delay and differential transition times figure 5a. test circuit figure 5b. measurement points figure 5. driver enable and disable times figure 6a. test circuit figure 6b. measurement points figure 6. driver data rate test circuits and waveforms (continued) d de di v cc signal generator r d z y c d out (z) 3v 0v 50% 50% 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 50 t lz y/z x 0/1 v cc 50 t zh y/z 0 (note 12) 1/0 gnd 100 t zl y/z 0 (note 12) 0/1 v cc 100 t zh(shdn) y/z 1 (note 15) 1/0 gnd 100 t zl(shdn) y/z 1 (note 15) 0/1 v cc 100 signal generator 110 ? c l out (y, z) 3v 0v 50% 50% v oh 0v v oh - 0.5v t hz out (y, z) v cc v ol v ol + 0.5v t lz de output low t zl , t zl(shdn) t zh , t zh(shdn) 50% 50% note 14 note 14 output high note 14 d de di v cc signal generator z y c d v od + - 54 ? 3v 0v diff out (y - z) +v od -v od di 0v free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 11 fn7921.0 february 20, 2012 figure 7a. test circuit figure 7b. measurement points figure 7. receiver propagation delay and data rate figure 8a. test circuit figure 8b. measurement points figure 8. receiver enable and disable times test circuits and waveforms (continued) signal generator r ro re a b 15pf signal generator +1.5v ro +2.25v +750mv t plh 1.5v 1.5v v cc 0v 50% 50% t phl a b 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 13) 0 +1.5v gnd t zl (note 13) 0 -1.5v v cc t zh(shdn) (note 16) 0 +1.5v gnd t zl(shdn) (note 16) 0 -1.5v v cc signal generator r ro re a b 15pf ro 3v 0v 50% 50% 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 low t zl , t zl(shdn) t zh , t zh(shdn) note 14 note 14 output high note 14 free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 12 fn7921.0 february 20, 2012 application information rs-485 and rs-422 are differential (balanced) data transmission standards used for lo ng haul or noisy environments. rs-422 is a subset 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-4 85 specification requires that drivers must handle bus contention without sustaining any damage. another important advantage of rs-485 is the extended common mode range (cmr), whic h specifies that the driver outputs and receiver inputs with stand signals that range from +12v to -7v. rs-422 and rs-485 ar e intended for runs as long as 4000 feet; thus, the wide cmr is necessary to handle ground potential differences, as well as voltages induced in the cable by external fields. the isl32450e, ISL32452E, isl32453e, isl32455e, isl32457e are a family of ruggedized rs-485 transceivers that improve on the rs-485 basic requirements and therefore increases system reliability. the cmr in creases to 20v, while the rs-485 bus pins (receiver inputs and driver outputs) include fault protection against voltages and transients up to 60v. additionally, the 15kv to 16.5kv built-in esd protection complements the fault protection. receiver (rx) features these devices utilize a differential input receiver for maximum noise immunity and common mode re jection. input sensitivity is better than 200mv (3.3v operatio n), as required by the rs-422 and rs-485 specifications. receiver input (load) current su rpasses the rs-422 specification of 3ma, and is four times lower than the rs-485 ?unit load (ul)? requirement of 1ma maximum. thus, these products are known as ?one-quarter ul? transceivers, and there can be up to 128 of these devices on a network while still complying with the rs-485 loading specification. the rx functions with common mo de voltages as great as 20v, making them ideal for industrial or 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), shorted together, or connected to a terminated bus with all the transmitters di sabled (i.e., an idle bus). receivers easily meet the data rates supported by the corresponding driver, and most receiver outputs are three-statable via the active low re input. the rx in the 250kbps and 1mbps versions include noise filtering circuitry to reject high freque ncy signals. the 1mbps version typically rejects pulses narrower than 50ns (equivalent to 20mbps), while the 250kbps rx rejects pulses below 150ns (6.7mbps). driver (tx) features the rs-485/rs-422 driver is a diff erential output device that delivers at least 1.7v across a 54 ? load (rs-485), and at least 2v across a 100 ? load (rs-422) with v cc 4.5v. the drivers feature low propagation delay skew to maximize bit width and to minimize emi, and all drivers ar e three-statable via the active high de input. the 250kbps and 1mbps driver outp uts are slew rate limited to minimize emi and to minimize reflections in unterminated or improperly terminated networks. high overvoltage (fault) protection increases ruggedness note: the available smaller pitch package (msop) may not meet the creepage and clearance (c&c) requirements for 60v levels. the user is advised to determine his c&c requir ements before selecting a package type. the 60v (referenced to the ic gnd) fault protection on the rs-485 pins makes these transcei vers some of the most rugged on the market. this level of protection makes the isl32450e, ISL32452E, isl32453e, isl32455e, isl32457e ideal for applications in which power (e.g., 24v and 48v supplies) must be routed in the conduit with the data lines and for outdoor applications where large transients are likely to occur. when power is routed with the data lines, even a momentary short between the supply and data lines will destroy an unprotected devi ce. the 60v fault levels of this family are at least four times higher than the levels specified for standard rs-485 ics. the isl32450e, ISL32452E, isl32453e, isl32455e, isl32457e protection is active whether the tx is enabled or disabled, and even if the ic is powered down. if transients or voltages (inc luding overshoots and ringing) greater than 60v are possible, then additional external protection is required. use a protection device with the lowest clamping voltage acceptable for the application, and remember that tvs type devices typically clamp 5v to 10v above the designated stand-off voltage (e.g ., a ?54v tvs? clamps between 60v and 66v). wide common mode voltage (cmv) tolerance improves operating range rs-485 networks operating in industrial complexes or over long distances are susceptible to large cmv variations. either of these operating environments may suffer from large node-to-node ground potential differences or cmv pickup from external electromagnetic sources, and devices with only the minimum required +12v to -7v cmr may malfunction. the isl32450e, ISL32452E, isl32453e, isl32455e , isl32457e extended 20v cmr allows for operation in environments that would overwhelm lesser transceivers. additionally, the rx will not phase invert (erroneously change state) even with cmvs of 25v or differential voltages as large as 40v. cable invert (polarity reversal) function with large node count rs-485 networks, it is common for some cable data lines to be wired backwards during installation. when this happens, the node is un able to communicate over the network. once a technician finds the miswired node, he must then rewire the connector, which is time consuming. free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 13 fn7921.0 february 20, 2012 the isl32457e simplifies this task by including a cable invert pin (inv) that allows the technician to invert the polarity of the rx input and the tx output pins simply by moving a jumper to change the state of the invert pin. when the invert pin is low, the ic operates like any standard rs-485 transceiver, and the bus pins have their normal polarity definition of a and y as noninverting and b and z as inverting. with the invert pin high, the corresponding bus pins reverse their polarity, so b and z become noninverting, and a and y become inverting. intersil?s unique cable invert function is superior to that found on competing devices, because the rx full fail-safe function is maintained, even when the rx polarity is reversed. competitor devices implement the rx invert function simply by inverting the rx output. this means that with the rx inputs floating or shorted together, the rx appropriately delivers a logic 1 in normal polarity, but outputs a logic low when the ic is operated in the inverted mode. intersil?s innovative rx design guarantees that, with the rx inputs floating or shorted together (v id =0v), the rx output remains high, regardless of the state of the invert pin. data rate, cables, and terminations rs-485/rs-422 are intended for network lengths up to 4000ft, but the maximum system data rate decreases as the transmission length increases. devices operating at 1mbps can operate at full data rates with lengths up to 800ft (244m). jitter is the limiting parameter at this faster data rate, so employing encoded data streams (e.g., manche ster coded or return-to-zero) may allow increased transmission distances. the slow versions can operate at 115kbps or less at the full 4000ft (1220m) distance, or at 250kbps for lengths up to 3000ft (915m). dc cable attenuation is the limitin g parameter, so using better quality cables (e.g., 22 awg) ma y allow increased transmission distance. twisted pair is the cable of choice for rs-485/rs-422 networks. twisted pair cables tend to pick up noise and other electromagnetically induced voltag es as common mode signals, which are effectively rejected by the differential receivers in these ics. short networks using the 250kbps versions need not be terminated; however, terminat ions are recommended unless power dissipation is an overriding concern. in point-to-point or point-to-multi point (single driver on bus like rs-422) 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 specification requires that drivers survive worst-case bus contentions undamaged. these transceivers meet this requiremen t via driver output short-circuit current limits and on-chip thermal shutdown circuitry. the driver output stages in corporate a double fold-back short-circuit current limiting scheme, which ensures that the output current never exceeds the rs-485 specification, even at the common mode and fault condition voltage range extremes. the first fold-back current level ( 83ma) is set to ensure that the driver never folds back when driving loads with common mode voltages up to 20v. the very low second fold-back current setting ( 13ma) minimizes power dissipation if the tx is enabled when a fault occurs. in the event of a major short-circuit condition, devices also include a thermal shutdown feature that di sables 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 +15c. if the contention persists, the thermal shutdown/re-enable cycle repeats until the fault is cleared. receiver s stay operational during thermal shutdown. low power shutdown mode these bicmos transceivers all use a fraction of the power required by competitive devices, but they (excluding isl32457e) also include a shutdown featur e that reduces the already low quiescent i cc to a 10a 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 transcei ver will not enter shutdown. note that receiver and driver enable times increase when the transceiver enables from shutdown. refer to notes 12, 13, 14, 15 and 16, at the end of the ?electrical specification? table on page 9, for more information. free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 14 fn7921.0 february 20, 2012 typical performance curves t a = +25 c ; unless otherwise specified. figure 9. driver output curr ent vs differential output voltage figure 10. driver differential output voltage vs temperature figure 11. supply current vs temperature figure 12. receiver output cu rrent vs receiver output voltage figure 13. bus pin current vs bus pin voltage figure 14. driver output current vs short circuit voltage differential output voltage (v) driver output current (ma) 0 10 20 30 40 50 60 70 80 0 0 . 5 1 1 . 5 2 2 . 5 3 3 . 5 4 4 . 5 5 +25c r d = 54 ? r d = 100 ? r d = 30 ? r d = 20 ? +85c v cc = 5v v cc = 3.3v +25c +85c temperature (c) differential output voltage (v) 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 -40-30-20-100 1020304050607080 v cc = 5v v cc = 3.3v r d = 100 ? r d = 100 ? r d = 54 ? r d = 54 ? 1.25 v cc = 5v v cc = 3.3v 85 1.4 1.5 1.6 1.7 1.8 1.9 2.0 2.1 2.2 -30 -20 -10 0 10 20 30 40 50 60 70 80 temperature (c) i cc (ma) de = v cc , re = x de = gnd, re = gnd -40 85 v cc = 5v v cc = 3.3v de = v cc , re = x de = gnd, re = gnd v cc = 5v v cc = 3.3v -60 -40 -20 0 20 40 60 80 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 receiver output voltage (v) receiver output current (ma) v oh , +25c v oh , +85c v ol , +25c v ol , +85c v cc = 5v v cc = 3.3v v cc = 5v v cc = 3.3v v ol , +85c v ol , +25c v oh , +85c v oh , +25c -600 -400 -200 0 200 400 600 800 1000 -70 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 70 bus pin voltage (v) bus pin current (a) v cc = 0v to 5.5v y or z a/y or b/z output voltage (v) output current (ma) -125 -100 -75 -50 -25 0 25 50 75 100 125 150 -60 -50 -40 -30 -20 -10 0 10 20 30 40 50 60 y or z = high y or z = low v cc = 3.3v, +25c v cc = 3.3v, +85c v cc = 5v, +25c v cc = 5v, +85c v cc = 3.3v, +25c v cc = 5v, +85c v cc = 3.3v, +85c v cc = 5v, +25c free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 15 fn7921.0 february 20, 2012 figure 15. driver differential propagation delay vs temperature (isl32450e, ISL32452E, isl32457e) figure 16. driver differential skew vs temperature (isl32450e, ISL32452E, isl32457e) figure 17. driver differential propagation delay vs temperature (isl32453e, isl32455e) figure 18. driver differential skew vs temperature (isl32453e, isl32455e) figure 19. 20v receiver performance (isl32450e, ISL32452E, isl32457e) figure 20. 20v receiver performance (isl32453e, isl32455e) typical performance curves t a = +25 c ; unless otherwise specified. (continued) temperature (c) propagation delay (ns) 200 210 220 230 240 250 260 270 280 290 300 -40-30-20-100 1020304050607080 t plh t phl r d = 54 ? , c d = 50pf v cc = 3.3v v cc = 5v t plh t phl 85 temperature (c) skew (ns) 0 1 2 3 4 5 6 7 -40 -30 -20 -10 10 20 30 40 50 60 70 80 85 v cc = 3.3v v cc = 5v 0 |t plh - t phl | temperature (c) propagation delay (ns) 50 55 60 65 70 75 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 85 t plh t phl r d = 54 ? , c d = 50pf v cc = 3.3v v cc = 5v t plh t phl temperature (c) skew (ns) 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 -40 -30 -20 -10 0 10 20 30 40 50 60 70 80 85 v cc = 3.3v v cc = 5v |t plh - t phl | time (1s/div) voltage (v) 0 5 10 15 20 -20 -15 -10 -5 0 5 ro a b ro a b v cc = 3.3v v cc = 5v v cc = 3.3v vid = 1v 250kbps v cc = 5v time (400ns/div) voltage (v) 0 5 10 15 20 -20 -15 -10 -5 0 5 ro a b ro a b v cc = 3.3v v cc = 5v v cc = 3.3v v cc = 5v vid = 1v 1mbps free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 16 fn7921.0 february 20, 2012 figure 21. v cc = 3.3v, driver and receiver waveforms (isl32450e, ISL32452E, isl32457e) figure 22. v cc = 3.3v, driver and receiver waveforms (isl32453e, isl32455e) figure 23. v cc = 5v, driver and receiver waveforms (isl32450e, ISL32452E, isl32457e) figure 24. v cc = 5v, driver and receiver waveforms (isl32453e, isl32455e) figure 25. logic input high voltage vs temperature die characteristics substrate potential (powered up) : gnd process: si gate bicmos typical performance curves t a = +25 c ; unless otherwise specified. (continued) time (1s/div) receiver output (v) 0 3 driver output (v) 0 3 driver input (v) di ro -2 0 1 2 a/y - b/z -1 r d = 54 ? , c d = 50pf time (400ns/div) receiver output (v) 0 3 driver output (v) 0 3 driver input (v) di ro -2 0 1 2 a/y - b/z -1 r d = 54 ? , c d = 50pf time (1s/div) receiver output (v) 0 5 driver output (v) 0 5 driver input (v) di ro -3 -2 -1 0 1 2 3 a/y - b/z r d = 54 ? , c d = 50pf time (400ns/div) receiver output (v) 0 5 driver output (v) 0 5 driver input (v) di ro -3 -2 -1 0 1 2 3 a/y - b/z r d = 54 ? , c d = 50pf temperature (c) input high voltage (v) -40-30-20-100 1020304050607080 85 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 v cc = 5v v cc = 3.3v free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 17 intersil products are manufactured, assembled and tested utilizing iso9000 quality systems as noted in the quality certifications found at www.intersil.com/design/quality intersil products are sold by description only. intersil corporat ion 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 furnished by intersil is believed to be accurate and reliable. however, no responsi bility is assumed by intersil or its subsid iaries for its use; nor for any infringem ents of patents 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 i ntersil or its subsidiaries. for information regarding intersil corporation and its products, see www.intersil.com fn7921.0 february 20, 2012 for additional products, see www.intersil.com/product_tree products intersil corporation is a leader in the design and manufacture of high-performance analog semico nductors. the company's product s address some of the industry's fastest growing markets, such as , flat panel displays, cell phones, handheld products, and noteb ooks. intersil's product families address power management and analog signal processing functions. go to www.intersil.com/products for a complete list of intersil product families. for a complete listing of applications, rela ted documentation and related parts, please see the respective device information p age on intersil.com: isl32450e, ISL32452E, isl32453e, isl32455e, isl32457e to report errors or suggestions for this datasheet, please go to www.intersil.com/askourstaff fits are available from our website at http://rel.intersil.com/reports/search.php revision history the revision history provided is for informational purposes only and is believed to be accurate, but not warranted. please go t o web to make sure you have the latest rev. date revision change february 20, 2012 fn7921.0 initial release free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 18 fn7921.0 february 20, 2012 package outline drawing m8.118 8 lead mini small outline plastic package rev 4, 7/11 detail "x" side view 2 typical recommended land pattern top view pin# 1 id 0.25 - 0.36 detail "x" 0.10 0.05 (4.40) (3.00) (5.80) h c 1.10 max 0.09 - 0.20 33 gauge plane 0.25 0.95 ref 0.55 0.15 b 0.08 c a-b d 3.00.05 12 8 0.85010 seating plane a 0.65 bsc 3.00.05 4.90.15 (0.40) (1.40) (0.65) d 5 5 side view 1 dimensioning and tolerancing conform to jedec mo-187-aa plastic interlead protrusions of 0.15mm max per side are not dimensions in ( ) are for reference only. dimensions are measured at datum plane "h". plastic or metal protrusions of 0.15mm max per side are not dimensions are in millimeters. 3. 4. 5. 6. notes: 1. 2. and amsey14.5m-1994. included. included. 0.10 c m free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 19 fn7921.0 february 20, 2012 package outline drawing m8.15 8 lead narrow body small outline plastic package rev 4, 1/12 detail "a" top view index area 123 -c- seating plane x 45 notes: 1. dimensioning and tolerancing per ansi y14.5m-1994. 2. package length 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. 3. package width does not include interlead flash or protrusions. interlead flash and protrusions shall not exceed 0.25mm (0.010 inch) per side. 4. the chamfer on the body is optional. if it is not present, a visual index feature must be located within the crosshatched area. 5. terminal numbers are shown for reference only. 6. the lead width 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). 7. controlling dimension: millimeter. co nverted inch dimensions are not necessarily exact. 8. this outline conforms to jedec publication ms-012-aa issue c. side view ?a side view ?b? 1.27 (0.050) 6.20 (0.244) 5.80 (0.228) 4.00 (0.157) 3.80 (0.150) 0.50 (0.20) 0.25 (0.01) 5.00 (0.197) 4.80 (0.189) 1.75 (0.069) 1.35 (0.053) 0.25(0.010) 0.10(0.004) 0.51(0.020) 0.33(0.013) 8 0 0.25 (0.010) 0.19 (0.008) 1.27 (0.050) 0.40 (0.016) 1.27 (0.050) 5.20(0.205) 1 2 3 4 5 6 7 8 typical recommended land pattern 2.20 (0.087) 0.60 (0.023) free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 20 fn7921.0 february 20, 2012 mini small outline pl astic 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 mold 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 (.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 shown for reference only. 9. dimension ?b? does not include 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 - m10.118 (jedec mo-187ba) 10 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 0.007 0.011 0.18 0.27 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 0.020 bsc 0.50 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 - n10 107 r 0.003 - 0.07 - - r1 0.003 - 0.07 - - 5 o 15 o 5 o 15 o - 0 o 6 o 0 o 6 o - rev. 0 12/02 free datasheet http:///
isl32450e, ISL32452E, isl3 2453e, isl32455e, isl32457e 21 fn7921.0 february 20, 2012 package outline drawing m14.15 14 lead narrow body small outline plastic package rev 1, 10/09 a d 4 0.25 a-b mc c 0.10 c 5 b d 3 0.10 a-b c 4 0.20 c 2x 2x 0.10 d c 2x h 0.10 c 6 3 6 id mark pin no.1 (0.35) x 45 seating plane gauge plane 0.25 (5.40) (1.50) 1.27 0.31-0.51 4 4 detail"a" 0.220.03 0.10-0.25 1.25 min 1.75 max (1.27) (0.6) 6.0 8.65 3.9 7 14 8 dimensioning and tolerancing conform to amsey14.5m-1994. dimension does not include interlead flash or protrusions. dimensions in ( ) for reference only. interlead flash or protrusions shall not exceed 0.25mm per side. datums a and b to be determined at datum h. 4. 5. 3. 2. dimensions are in millimeters. notes: 1. the pin #1 indentifier may be either a mold or mark feature. 6. does not include dambar protrusion. allowable dambar protrusion 7. reference to jedec ms-012-ab. shall be 0.10mm total in excess of lead width at maximum condition. detail "a" side view typical recommended land pattern top view free datasheet http:///

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