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1 ? fn6060 isl4486, isl81486 5v, ultra high speed, profibus, rs-485/rs-422 transceivers the intersil isl4486 and isl81486 are bicmos, 5v powered, single transceivers th at meet both the rs-485 and rs-422 standards for balanced communication, and feature the larger output voltage and higher data rate - up to 40mbps - required by high speed profibus applications. unlike competitive products, these intersil devices are specified for 10% tolerance supplies (4.5v to 5.5v) and deliver at least a 2.3v differ ential output voltage over this supply range. at the 5% tolerance specified by many competitors, the isl4486 del ivers an unsurpassed 2.5v differential signal into a 54 ? total load. this translates into longer reach, or better data integrity, at the exceptional 40mbps data rate. scsi applications benefit from the isl4486?s low receiver and transmitter part-to-part skews , which make it perfect for high speed parallel applications where large numbers of bits must be simultaneously captured. the low bit-to-bit skew eases the timing constraints on the data latching signal. these devices present a ?0.6 unit load? to the rs-485 bus, which allows up to 50 transceivers on the network. receiver (rx) inputs feature a ?fail-safe if open? design, which ensures a logic high rx output if rx inputs are floating. driver (tx) outputs are short circuit protected, even for voltages exceeding the power supply voltage. additionally, on-chip thermal shutdown circuitr y disables the tx outputs to prevent damage if power dissipation becomes excessive. features ? specified for 10% tolerance supplies ? high data rates isl4486 . . . . . . . . . . . . . . . . . . . . . . . . . . up to 40mbps isl81486 . . . . . . . . . . . . . . . . . . . . . . . . . up to 30mbps ? large differential output voltage. . . . . . . . . . 3v into 54 ? ? low bit-to-bit (part-to-part) skew for parallel applications ? 0.6 unit load allows up to 50 devices on the bus ? isl81486 is a drop-in replacement for the adm1486 ? low quiescent current . . . . . . . . . . . . . . . . . . . . . 800 a ? -7v to +12v common mode input voltage range ? three state rx and tx outputs ? 14ns (max) propagation delays, 2ns (max) skew ? operates from a single +5v supply (10% tolerance) ? current limiting and thermal shutdown for driver overload protection applications ? scsi ?fast 40? drivers and receivers ? profibus dp and fms networks ? factory automation ? field bus networks ? security networks ? building environmental control systems ? industrial/process control networks ordering information part no. (brand) temp. range ( o c) package pkg. dwg. # isl4486ib (4486ib) -40 to 85 8 ld soic m8.15 ISL4486IB-T (4486ib) -40 to 85 8 ld soic (tape and reel) m8.15 isl4486iu (4486) -40 to 85 8 ld msop m8.118 isl4486iu-t (4486) -40 to 85 8 ld msop (tape and reel) m8.118 isl81486ib (81486ib) -40 to 85 8 ld soic m8.15 isl81486ib-t (81486ib) -40 to 85 8 ld soic (tape and reel) m8.15 isl81486iu (1486) -40 to 85 8 ld msop m8.118 isl81486iu-t (1486) -40 to 85 8 ld msop (tape and reel) m8.118 pinout isl4486, isl81486 (soic, msop) top view ro re de di 1 2 3 4 8 7 6 5 v cc b / z a / y gnd d r data sheet december 2003 caution: these devices are sensitive to electrosta tic 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. 2003. all rights reserved all other trademarks mentioned are the property of their respective owners.
2 truth table transmitting inputs outputs re de di b / z a / y x1101 x1010 x 0 x high-z high-z truth table receiving inputs output re de a-b ro 00 +0.2v 1 00 -0.2v 0 0 0 inputs open 1 1 x x high-z pin descriptions pin function ro receiver output: if a > b by at least 0.2v, ro is high; if a < b by 0.2v or more, ro is low; ro = high if a and b are unconne cted (floating). 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 rs-485/422 level, noninverting receiver input and noninverting dr iver output. pin is an input (a) if de = 0; pin is an out put (y) if de = 1. b / z rs-485/422 level, inverting receiver input and inverting driver output. pin is an input (b) if de = 0; pin is an output (z ) if de = 1. v cc system power supply input (4.5v to 5.5v). typical operating circuit isl4486 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 isl4486, isl81486
3 absolute maximum rati ngs thermal information v cc to ground. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7v input voltages di, de, re . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5v to 7v input / output voltages a/y, b/z . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -8v to +12.5v ro . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5v to (v cc +0.5v) short circuit duration y, z. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . continuous operating conditions temperature range islxx86ix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -40 o c to 85 o c thermal resistance (typical, note 1) ja ( o c/w) 8 ld soic package . . . . . . . . . . . . . . . . . . . . . . . . . 105 8 ld msop package . . . . . . . . . . . . . . . . . . . . . . . . 140 maximum junction temperature (plastic package) . . . . . . . 150 o c maximum storage temperature range . . . . . . . . . -65 o c to 150 o c maximum lead temperature (soldering 10s) . . . . . . . . . . . . 300 o c (lead tips only) caution: stresses above those listed in ?abs olute maximum ratings? may cause permanent dam age 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: 1. 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 = 25 o c, note 2 parameter symbol test conditions temp ( o 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 = 50 ? (rs-422) (figure 1a) full 2.5 3.7 - v r = 27 ? (rs-485), v cc 4.75v (figure 1a, isl4486 only) full 2.5 3 5 v r = 27 ? (rs-485), v cc = 4.5v (figure 1a) full 2.3 - 5 v r d = 60 ? , -7v v cm 12v, v cc 4.75v (figure 1b) full 2.4 - - v change in magnitude of driver differential v out for complementary output states ? v od r = 27 ? or 50 ? , (figure 1a) full - 0.01 0.2 v driver common-mode v out v oc r = 27 ? or 50 ? (figure 1a) full - - 3 v change in magnitude of driver common-mode v out for complementary output states ? v oc r = 27 ? or 50 ? (figure 1a) full - 0.01 0.2 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 logic input current i in1 de, di, re full -1 - 1 a input current (a/y, b/z), note 5 i in2 de = 0v, v cc = 0v or 4.5 to 5.5v v in = 12v full - - 0.6 ma v in = -7v full -0.35 - - ma receiver differential threshold voltage v th -7v v cm 12v full -0.2 - 0.2 v receiver input hysteresis ? v th v cm = 0v 25 - 40 - mv receiver output high voltage v oh i o = -4ma, v id = 200mv full 4 - - v receiver output low voltage v ol i o = -4ma, v id = 200mv full - - 0.4 v three-state (high impedance) receiver output current i ozr 0.4v v o 2.4v full - - 1 a receiver input resistance r in -7v v cm 12v, note 7 full 20 - - k ? no-load supply current, note 3 i cc di, re = 0v or v cc de = v cc full - 1 2 ma de = 0v full - 0.8 1.5 ma isl4486, isl81486
4 driver short-circuit current, v o = high or low i osd1 de = v cc , -7v v y or v z 12v, note 4 full 60 - 250 ma receiver short-circuit current i osr 0v v o v cc full 7 - 85 ma switching characteristics driver input to output prop delay t plh , t phl r diff = 54 ? , c l = 100pf (figure 2) isl4486 full 3 9 14 ns isl81486 full 3 9 17 ns prop delay delta, min-to-max t dp-pskew r diff = 54 ? , c l = 100pf, isl4486 only (note 6, figure 2) full - 0 6 ns driver prop delay skew t skew r diff = 54 ? , c l = 100pf (figure 2) full - 0 2 ns driver differential rise or fall time t r , t f r diff = 54 ? , c l = 100pf (figure 2) isl4486 full - 5 8 ns isl81486 full - 7 15 ns driver enable to output high t zh c l = 50pf, sw = gnd (figure 3) full - 9 15 ns driver enable to output low t zl c l = 50pf, sw = v cc (figure 3) full - 9 15 ns matched enable switching |t azh - t bzl | or |t bzh - t azl | ? t en at identical test conditions (figure 3) full - 1 3 ns driver disable from output high t hz c l = 50pf, sw = gnd (figure 3) full - 9 15 ns driver disable from output low t lz c l = 50pf, sw = v cc (figure 3) full - 9 15 ns matched disable switching |t ahz - t blz | or |t bhz - t alz | ? t dis at identical test conditions (figure 3) full - 2 5 ns driver maximum data rate f maxd | v od | 1.5v (figure 4) isl4486 full 40 - - mbps isl81486 full 30 - - mbps receiver input to output prop delay t plh , t phl (figure 5) isl4486 full 11 17 25 ns isl81486 full 6 17 25 ns prop delay delta, min-to-max t rp-pskew isl4486 only (note 6, figure 5) full - 0 9 ns receiver prop delay skew | t plh - t phl | t skd figure 5 full - 0.5 3 ns receiver enable to output high t zh c l = 15pf, sw = gnd (figure 6) full - 7 13 ns receiver enable to output low t zl c l = 15pf, sw = v cc (figure 6) full - 7 13 ns receiver disable from output high t hz c l = 15pf, sw = gnd (figure 6) full - 7 13 ns receiver disable from output low t lz c l = 15pf, sw = v cc (figure 6) full - 7 13 ns receiver maximum data rate f maxr c l = 15pf, v id 1.5v, ro t h and t l 20ns full 40 - - mbps notes: 2. 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. 3. supply current specification is va lid for loaded drivers when de = 0v. 4. applies to peak current. see ?typical pe rformance curves? for more information. 5. devices meeting these limits are denoted as ?0.6 unit load (u l)? transceivers. the rs-485 standard allows up to 32 unit loads on the bus, so a 0.6ul transceiver permits > 50 devices on the bus. 6. this is the part-to-part skew between any two units te sted with identical test conditions (temperature, v cc , etc.). electrical specifications test conditions: v cc = 4.5v to 5.5v; unless otherwise specified. typicals are at v cc = 5v, t a = 25 o c, note 2 (continued) parameter symbol test conditions temp ( o c) min typ max units isl4486, isl81486
5 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 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 d de di v cc v od v oc r r z y d de di v cc v od 375 ? 375 ? z y r d = 60 ? v cm -7v to +12v d de di v cc signal generator c l = 100pf r diff z y c l = 100pf out (y) 3v 0v t plh 1.5v 1.5v v oh v ol 50% 50% t phl out (z) t phl v oh v ol 50% 50% t plh diff out (y - z) t r +v od -v od 90% 90% t f 10% 10% di skew = |crossing pt. of y & z - crossing pt. of y & z | d de di c l 110 ? 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 x 1 / 0 gnd 50 t zl y / z x 0 / 1 v cc 50 signal generator out (y, z) 3v 0v 1.5v 1.5v v oh 0v 2.3v v oh - 0.5v t hz out (y, z) v cc v ol 2.3v v ol + 0.5v t lz de output high output low t zl t zh isl4486, isl81486
6 figure 4a. test circuit figure 4b. measurement points figure 4. driver data rate figure 5a. test circuit figure 5b. measurement points figure 5. receiver propagation delay figure 6a. test circuit figure 6b. measurement points figure 6. receiver enable and disable times test circuits and waveforms (continued) d de di v cc signal generator c l = 100pf r diff z y c l = 100pf 3v 0v diff out (y - z) +v od -v od di 0v signal generator r ro re a b +1.5v 15pf ro 3v 0v t plh 1.5v 1.5v v cc 0v 50% 50% t phl a 1k ? v cc gnd sw parameter de a sw t hz 0 +1.5v gnd t lz 0-1.5vv cc t zh 0 +1.5v gnd t zl 0-1.5vv cc signal generator r ro re a b 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 zh isl4486, isl81486
7 application information rs-485 and rs-422 are diff erential (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) stan dard, 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 mix 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 withstand signals that range from +12v to -7v. rs-422 and rs-485 are intended for runs as long as 4000? (~1200m), 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 rs422 and rs-485 specifications. 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, or industrial environments, where induced voltages are a realistic concern. receiver input resistance surpasses the rs-422 spec of 4k ? , and exceeds the rs-485 ?unit load? requirement of 12k ? minimum. the 20k ? input resistance allows at least 50 devices on the rs-485 bus. all the receivers include a ?fail- safe if open? function that guarantees a high level receiver output if the receiver inputs are unconnected (floating). receivers easily meet the data rate supported by the driver, and receiver outputs are three- statable via the active low re input. driver features the rs-485 / rs-422 driver is a differential output device that delivers at least 2.3v across a 54 ? load (rs-485 / profibus), and at least 2.5v across a 100 ? load (rs-422) even with v cc = 4.5v. the drivers feature low propagation delay skew to maximize bit width, and to minimize emi. outputs of the drivers are not sl ew rate limited, so faster output transition times allow data rates of at least 40mbps with the isl4486, and 30mbps with the isl81486. driver outputs are three-statable via the active high de input. for parallel applications, bit-to-bit skews between any two isl4486 transmitter and receiver pairs are guaranteed to be no worse than 15ns (6ns max for any two tx, 9ns max for any two rx). data rate, cables, and terminations twisted pair is the cable of choice for rs-485, rs-422, and profibus 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. rs-485 / rs-422 are intended for network lengths up to 4000? (~1200m), but the ma ximum system data rate decreases as the transmission length increases. according to guidelines in the rs-422 and profibus specifications, networks operating at data rates in excess of 3mbps should be limited to cable lengths of 100m (328 feet) or less, and the profibus specification recommends that the more expensive ?type a? (22awg) cable be used. nevertheless, the isl4486?s large differential output swing, fast transition times, and high drive-current output stages allow operation at 40mbps over standard ?cat5? cables in excess of 400 feet (121m). figure 8 details the isl4486 performance at this condition, with a 120 ? termination resistor at both the driver and the receiver ends. no te that the differential signal delivered to the receiver at the end of the cable (a-b) still exceeds 1v, so even longer cables could be driven if lower noise margins are acceptable. if more noise margin is desired, shorter cables produce a larger receiver input signal as illustrated in figure 7. pe rformance should be even better if the ?type a? cable is utilized . the lower data rate of the isl81486 allows for driving longer cables. to minimize reflections, proper termination is imperative when using these high data rate transceivers. in point-to-point, or point-to-multipoint (single driv er on bus) networks, the main cable should be terminated in its characteri stic impedance (typically 120 ? for ?cat5?, and 220 ? for ?type a?) at the end farthest from the driver. in mu lti-receiver applications, stubs connecting receivers to the main cable should be kept as short as possible. multipoint (mul ti-driver) systems require that the main cable be terminated in its characteri stic 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 c ontentions undamaged. these transmitters meet this require ment 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. in the event of a major short circuit condition, the devices also include a thermal shutdown feature that disables th e drivers whenever the die temperature becomes excessive. this eliminates the power dissipation, allowing the die to cool. the drivers automatically reenable after t he die temperature drops about 15 degrees. if the content ion persists, the thermal shutdown/reenable cycle repeats until the fault is cleared. receivers stay operational during thermal shutdown. isl4486, isl81486
8 typical performance curves v cc = 5v, t a = 25 o c, isl4486 and isl81486; unless otherwise specified figure 7. isl4486 driver and receiver waveforms driving 200 feet (61 meters) of cat5 cable (double terminated with 120 ? ) figure 8. isl4486 driver and receiver waveforms driving 400 feet (121 meters) of cat5 cable (double terminated with 120 ? ) figure 9. isl81486 driver waveforms at 30mbps per figure 4 figure 10. supply current vs temperature figure 11. driver output current vs differential output voltage figure 12. driver differen tial output voltage vs temperature time (10ns/div) -3 receiver output (v) 1.5 3 -1.5 0 0 5 receiver input (v) 0 5 driver input (v) di = 40mbps ro driver+cable delay (~290ns) a - b time (10ns/div) -3 receiver output (v) 1.5 3 -1.5 0 a - b 0 5 receiver input (v) 0 5 driver input (v) ro driver+cable delay (~585ns) di = 40mbps time (10ns/div) -3 driver output (v) 1.5 3 -1.5 0 diff waveform (v) a/y - b/z 0 1 2 3 4 5 b/z a/y r diff = 54 ? , c l = 100pf -40 0 50 85 temperature ( o c) i cc ( a) -25 25 75 700 750 800 850 900 950 de = v cc , re = x de = gnd, re = x differential output voltage (v) driver output current (ma) 012345 0 20 40 60 80 100 120 -40 0 50 85 temperature ( o c) differential output voltage (v) -25 25 75 2.8 3 3.2 3.4 3.6 3.8 4 r diff = 100 ? r diff = 54 ? isl4486, isl81486
9 figure 13. driver propagation delay vs temperature figure 14. driver skew and pulse distortion vs temperature figure 15. driver and receiver waveforms, low to high figure 16. driver and receiver waveforms, high to low figure 17. driver output current vs short circuit voltage die characteristics substrate potential (powered up): gnd transistor count: 528 process: si gate bicmos typical performance curves v cc = 5v, t a = 25 o c, isl4486 and isl81486; unless otherwise specified (continued) -40 0 50 85 temperature ( o c) -25 25 75 propagation delay (ns) t phlz t plhz t phly t plhy r diff = 54 ? 7 8 9 10 11 12 -40 0 50 85 temperature ( o c) skew (ns) -25 25 75 r diff = 54 ? 0 0.5 1 1.5 2 2.5 3 |t phly - t plhz | or |t plhy - t phlz | |crossing pt. of y & z - crossing pt. of y & z | |t phl(y or z) - t plh(y or z) | = pw distortion time (10ns/div) receiver output (v) r diff = 54 ? , c l = 15pf 0 5 driver output (v) 0 5 driver input (v) di ro b/z a/y 0 1 2 3 4 5 time (10ns/div) receiver output (v) r diff = 54 ? , c l = 15pf 0 5 driver output (v) 0 5 driver input (v) di ro b/z a/y 0 1 2 3 4 5 output voltage (v) -7 -6 -4 -2 0 2 4 6 8 10 12 output current (ma) -60 -40 -20 0 20 40 60 80 100 120 140 160 -80 -100 -120 y or z = high -140 -160 y or z = low y or z = high isl4486, isl81486
10 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 (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 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 - 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 isl4486, isl81486
11 all intersil u.s. products are manufactured, asse mbled and tested utilizing iso9000 quality systems. intersil corporation?s quality ce rtifications can be viewed at www.intersil.com/design/quality intersil products are sold by description only. intersil corporation 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 da ta 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 small outline plast ic 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 isl4486, isl81486

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