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exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 description features applications sp3080e-3088e advanced-failsafe rs-485/rs-422 transceivers /8th unit load, slew-rate limited, 5kv esd-protected ? 5.0v single supply operation ? receiver failsafe on open, shorted or terminated lines ? /8th unit load, 256 transceivers on bus ? robust esd protection for rs-485 pins o 5kv air-gap discharge o 5kv human body model o 8kv contact discharge ? controlled driver slew rates o 5kbps, low emi (sp3080e, sp308 e, sp3082e) o 500kbps, low emi (sp3083e, sp3084e, sp3085e) o high speed, 20mbps (sp3086e, sp3087e, sp3088e) ?hot swap glitch protection on control inputs ?driver short circuit current limit and thermal shutdown for overload protection ?ultra-low 400a quiescent current ?1a shutdown mode (except sp3081e, sp3084e, sp3087e) ?industry standard package footprints ? motor control ? building automation ? security systems ? remote meter reading ? long or un-terminated transmission lines the sp3080e-sp3088e family of rs-485 devices are designed for reliable, bidirectional commu - nication on multipoint bus transmission lines. each device contains one differential driver and one differential receiver. the sp3082e, sp3085e and sp3088e are half-duplex devices; other part num - bers are full-duplex. all devices comply with tia/eia-485 and tia/eia-422 standards. lead-free and rohs compliant packages are available for all models. these devices are ruggedized for use in harsh operating conditions over the entire common-mode voltage range from -7v to + 2v. receivers are specially designed to fail-safe to a logic high output state if the inputs are left un-driven or shorted. all rs-485 bus-pins are protected against severe esd events up to 5kv (air-gap and human body model) and up to 8kv contact discharge (iec 61000-4-2). drivers are protected from excess current fow caused by bus contention or output short- circuits by both an internal current limit and a thermal-overload shutdown. devices are rated for in - dustrial (-40 to +85oc) operating temperatures. receivers have exceptionally high input impedance, which places only /8th the standard load on a shared bus. up to 256 transceivers may coexist while preserving full signal margin. all devices operate from a single 5.0v power supply and draw negligible quiescent power. all ver - sions except the sp308 e, sp3084e, and sp3087e may independently enable and disable their driver and receiver and enter a low power shutdown mode if both driver and receiver are disabled. all outputs maintain high impedance in shutdown or when powered-off. 8 pin nsoic sp3082e sp3085e sp3088e half duplex 8 pin nsoic sp308e sp3084e sp3087e full duplex 2 3 4 5 6 7 8 5 6 7 8 2 3 4 4 pin nsoic sp3080e sp3083e sp3086e full duplex 2 3 4 5 6 7 8 9 0 2 3 4 nc ro re de di gnd gnd vc c nc a b z y nc vc c ro di gnd a b z y gnd a b vc c ro re de di
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 2 device architecture and block diagrams devices are available in three industry standard architectures and footprints. in each footprint there are three speed grades available. d r a b z y ro gnd 2 1 3 4 5 6 7 8 di v cc d r a b ro gnd 2 1 3 4 5 6 7 8 de v cc re di v cc d r nc a b z y ro nc nc de re gnd gnd 2 1 3 4 5 6 7 8 9 10 11 12 13 14 di 4-pin full duplex sp3080e, 5kbps slew rate limited sp3083e, 500kbps slew rate limited sp3086e, 20mbps 8-pin full duplex sp308e, 5kbps slew rate limited sp3084e, 500kbps slew rate limited sp3087e, 20mbps 8-pin half duplex sp3082e, 5kbps slew rate limited sp3085e, 500kbps slew rate limited sp3088e, 20mbps
3 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 pin assignments pin number pin name pin function full-duplex half - duplex sp3080e sp308e sp3082e sp3083e sp3084e sp3085e sp3086e sp3087e sp3088e 2 2 ro receiver output. when re is low and if (a C b) -40mv, ro is high. if (a C b) - 200mv, ro is low. 3 - 2 re reree receiver output enable. when re is low, ro is enabled. when re is high, ro is high impedance. drive re high and de low to enter shutdown mode. re is a hot-swap input. 4 - 3 de driver output enable. when de is high, outputs are enabled. when de is low, outputs are high impedance. drive de low and re high to enter shutdown mode. de is a hot-swap input. 5 3 4 di driver input. with de high, a low level on di forces non-inverting output low and inverting output high. a high level on di forces non- inverting output high and inverting output low. 6, 7 4 5 gnd ground 9 5 - y non-inverting driver output 0 6 - z inverting driver output 7 - b inverting receiver input - - 7 b inverting receiver input and inverting driver output 2 8 - a non-inverting receiver input - - 6 a non-inverting receiver input and non-inverting driver output 4 8 v cc positive supply v cc . bypass to gnd with a 0. uf capacitor. , 8, 3 - - nc no connect, not internally connected note: on 4-pin packages connect both pins 6 and 7 to ground.
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 4 absolute maximum r atings recommended operating conditions these are stress ratings only and functional operation of the device at these ratings or any other above those indi - cated in the operation sections of the specifcations below is not implied. exposure to absolute maximum rating con - ditions for extended periods of time may affect reliability. supply voltage (v cc ).......................................................+ 7.0v input voltage at control input pins ( re , de)... -0.3v to v cc +0.3v driver input voltage (di) ..............................-0.3v to v cc +0.3v driver output voltage (a, b, y, and z) ............................+/- 3v receiver output voltage ( ro ) .................-0.3v to (vcc + 0.3v) receiver input voltage (a, b) .........................................+/-3v voltage input range, transient pulse, a, b, y and z through 100?, see figure 11 ......................................+/-65.0v package power dissipation: maximum junction temperature 50c 8-pin so ja = 28.4c/w 14-pin so ja = 86c/w storage temperature.......................................-65c to + 50c lead temperature (soldering, 0s)............................... +300c recommended operating conditions min. nom. max. unit supply voltage, v cc 4.5 5 5.5 v input voltage on a and b pins -7 2 v high-level input voltage (di, de or re ), v ih 2 v cc v low-level input voltage (di, de or re ), v ih 0 0.8 v output current driver -60 60 ma receiver -8 8 signaling rate, /t ui sp3080e, sp308e, sp3082e 0. 5 mbps sp3083e, sp3084e, sp3085e 0.5 sp3086e, sp3087e, sp3088e 20 operating free air temperature, t a industrial grade (e) -40 85 c note: the least positive (most negative) limit is designated as the maxium value. vcc=5v 0%, t min to t max , unless otherwise noted, typical values are vcc=5v and t a =25 c
5 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 electrical characteristics parameter test conditions min typ max unit digital input signals: di, de, re logic input thresholds high, v ih 2.0 v low, v il 0.8 logic input current t a = 25c, after frst transition a input hysteresis t a = 25c 00 mv driver differential driver output (v od ) no load v cc v differential driver output, test r l =100 (rs-422) 2 v cc v r l =54 (rs-485) .5 2.7 v cc differential driver output, test 2 v cm = -7 to +2v .5 v cc change in magnitude of differential output voltage (v od ) (note ) r l =54 or 100 0.2 v driver common mode output voltage (vcc) r l =54 or 100 3 v change in common mode output voltage (v oc ) r l =54 or 100 0.2 v driver short circuit current limit -7v v out +12v (note 5) 250 ma output leakage current (full-duplex versions, y & z pins) note 2 de=0, v out =2v 25 a re =0, v cc =0 or 5.5v v out = -7v -00 receiver receiver input resistance -7v v cm 12v 96 k input current (a, b pins) de=0, re =0, vcc=0 or 5.5v v in = 2v 25 v in = -7v -00 a receiver differential threshold (va-vb) -7v v cm 12v -200 -25 -40 mv receiver input hysteresis 25 mv receiver output voltage v oh i out = -8ma, v id = -40mv vcc-.5 v v ol i out = 8ma, v id = -200mv 0.4 high-z receiver output current v cc =5.5v, 0 v out v cc a receiver output short circuit current 0v v ro v cc 95 ma supply and protection supply current iq, active mode no load, di=0 or v cc 400 900 a shutdown mode de=0, re =vcc, di=v cc a thermal shutdown temperature junction temperature 65 o c thermal shutdown hysteresis 5 notes: . change in magnitude of differential output voltage and change in magnitude of common mode output voltage are the changes in output voltage when di input changes state. 2. except devices which dont have de or re inputs. 3. the transceivers are put into shutdown by bringing re high and de low. if the inputs are in this state for less than 50ns the device does not enter shutdown. if the enable inputs are held in this state for at least 600ns the device is assured to be in shutdown. in this low power mode most circuitry is disabled and supply current is typically na. 4.characterized, not 00% tested. 5. see driver short circuit limit test circuit.
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 6 timing characteristics sp3080e, sp308e, sp3082e conditions min. typ. max. unit driver characteristics: data signaling rate ( / t ui ) duty cycle 40 to 60% 5 kbps driver propagation delay (t phl , t plh ) r l = 54?, c l = 50pf, 500 2600 ns driver output rise/fall time (t r , t f ) 667 200 2500 ns driver differential skew (t plh C t phl ) 200 ns driver enable to output high (t dzh ) sp3080e, sp308e 3500 ns driver enable to output low (t dzl ) 3500 ns driver disable from output high (t dhz ) 00 ns driver disable from output low (t dlz ) 00 ns shutdown to driver output valid (t dzv ) 6000 ns sp3083e, sp3084e, sp3085e conditions min. typ. max. unit driver characteristics: data signaling rate (/ t ui ) duty cycle 40 to 60% 500 kbps driver propagation delay (t phl , t plh ) r l = 54?, c l = 50pf, 250 000 ns driver output rise/fall time (t r , t f ) 200 530 750 ns driver differential skew (t plh C t phl ) 00 ns driver enable to output high (t dzh ) sp3083e, sp3084e 2500 ns driver enable to output low (t dzl ) 2500 ns driver disable from output high (t dhz ) 00 ns driver disable from output low (t dlz ) 00 ns shutdown to driver output valid (t dzv ) 4500 ns sp3086e, sp3087e, sp3088e conditions min. typ. max. unit driver characteristics: data signaling rate ( / t ui ) duty cycle 40 to 60% 20 mbps driver propagation delay (t phl , t plh ) r l = 54?, c l = 50pf, 2 20 ns driver output rise/fall time (t r , t f ) 6 0 ns driver differential skew (t plh C t phl ) 5 ns driver enable to output high (t dzh ) sp3086e, sp3087e 50 ns driver enable to output low (t dzl ) 50 ns driver disable from output high (t dhz ) 50 ns driver disable from output low (t dlz ) 50 ns shutdown to driver output valid (t dzzv ) 250 ns receiver characteristics: conditions min. typ. max. unit receiver prop. delay sp3080e - sp3085e c l = 5pf, v id = 2v, 75 200 ns receiver prop. delay sp3086e - sp3088e 75 ns prop. delay skew sp3080e-sp3085e 30 ns prop. delay skew sp3086e-sp3088e 5 ns receiver output rise/fall time c l = 5pf 5 ns receiver enable to output high (t zh ) 50 ns receiver enable to output low (t zl ) 50 ns receiver disable from high (t hz ) 50 ns receiver disable from low (t lz ) 50 ns shutdown to receiver output valid (t rov ) 3500 ns time to shutdown (note 2,3,4) 50 200 600 ns unless otherwise noted vcc= +5.00.5v, ambient temperature t a from -40 to +85oc
7 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 typical performance characteristics timing characteristics 200 225 250 275 300 325 350 -6 0 - 40 -2 0 0 20 40 60 80 100 te mp er at ur e (o c) no -l oad su pply cu rre nt (u a) de = vcc de = gnd 50 0 55 0 60 0 65 0 70 0 -6 0 - 40 -2 0 0 20 40 60 80 10 0 te mp er at ur e (o c) sh ut d own cu rre nt (n a) no-load supply current vs temperature 0. 1 1 10 10 0 1000 1 1 0 1 00 1000 si gnaling ra te (k bps ) su p ply cu rre nt (ma) dr iv er and rec ei ve r re ce iv er no l oad v cc =5 v t a =2 5o c 50% s qua re wa ve inpu t 0. 1 1 10 10 0 1000 1 1 0 1 00 1000 si gnaling ra te (kb ps ) su p ply cu rre nt (ma) rec eiv er dr iv er and re ce iv er no l oad v cc =5 v t a =2 5o c 50% sq uar e wa ve inpu t 0. 1 1 10 10 0 1 1 0 100 1000 10000 10000 0 si gnaling ra te (kb ps ) su p ply cu rre nt (ma) re ce iv er dr iv er and rec ei ve r no l oad v cc =5 v t a =2 5o c 50% s qua re wa ve inpu t 0 10 20 30 40 50 60 70 80 90 10 0 0 1 2 3 4 5 6 ou tp ut low vo lt age (v ) ou t put cu rre nt (ma) shutdown current vs temperature supply current vs signaling rate (sp3080e-sp3082e) supply current vs signaling rate (sp3083e-sp3085e) output current vs driver output low voltage supply current vs signaling rate (sp3086e-sp3088e)
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 8 typical performance characteristics receiver output voltage vs differential input voltage driver output current vs differential output voltage 0.01 0. 1 1 10 10 0 0 1 2 3 4 5 6 di ffe re nt ia l ou tput vo lt age (v ) ou tput cu rr ent (m a) -1 20 -1 00 -8 0 -6 0 -4 0 -2 0 0 -2 0 2 4 6 ou t put high v olt age (v ) ou t put cu rre nt (ma) output current vs driver output high voltage 2 2. 2 2. 4 2. 6 2. 8 3 3. 2 3. 4 -6 0 - 40 -2 0 0 20 40 60 80 10 0 te mp er at ur e (o c) ou t put vo lt age (v) r l =5 4 r l =1 00 driver differential output voltage vs temperature 0. 1 0.15 0. 2 0.25 0. 3 0.35 -6 0 - 40 -2 0 0 20 40 60 80 100 te mp er atur e (o c) ou tput low vo lt age (v ) i ou t =8 ma , v id =- 200 mv receiver output low voltage vs temperature receiver output high voltage vs temperature 3. 5 3. 6 3. 7 3. 8 3. 9 4 -6 0 - 40 -2 0 0 20 40 60 80 100 te mp er atur e (o c) ou tput hi gh vo lt age (v ) i ou t =8 ma , v id =- 40 mv 0 1 2 3 4 5 -2 00 -1 80 -1 60 - 140 -1 20 -1 00 -8 0 - 60 -4 0 - 20 0 di ff er ent ial in pu t vo lt age (m v) rec eiv er ou tp ut v olt a ge (v) v cc =5 v t a =2 5o c
9 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 typical performance characteristics driver average propagation delay vs temperature (sp3083e-sp3085e) 410 415 420 425 430 435 -6 0 - 40 -2 0 0 20 40 60 80 100 te mp er atur e (o c) pr opagat io n de la y (n s) r l = 54 ,c l = 50pf driver propagation delay vs temperature (sp3083e-sp3085e) 390 400 410 420 430 440 450 460 -6 0 - 40 -2 0 0 20 40 60 80 10 0 te mp er atur e (o c) pr opagat io n de la y (n s) t pl h t ph l r l =5 4 ,c l =5 0p f 0 10 20 30 40 50 60 0 1 2 3 4 5 ou tp ut low v olt age (v ) output current (ma) output current vs receiver output low voltage 0 5 10 15 20 25 30 35 0 1 2 3 4 5 ou tp ut high v olt age (v ) ou t put cu rre nt (ma) output current vs receiver output high voltage 87 0 88 0 89 0 90 0 91 0 92 0 93 0 94 0 95 0 96 0 -6 0 - 40 -2 0 0 20 40 60 80 10 0 te m per atur e (o c) pr opagat io n de la y (n s) r l =5 4 ,c l =5 0pf driver average propagation delay vs temperature (sp3080e-sp3082e) 87 0 88 0 89 0 90 0 91 0 92 0 93 0 94 0 95 0 96 0 -6 0 - 40 -2 0 0 20 40 60 80 100 te m per at ur e (o c) pr opagat i on dela y (n s) t pl h t ph l r l =5 4 ,c l =5 0p f driver propagation delay vs temperature (sp3080e-sp3082e)
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 0 typical performance characteristics propagation delay (ns) driver average propagation delay vs temperature (sp3086e-sp3088e) driver propagation delay vs temperature (sp3086e-sp3088e) receiver propagation delay vs temperature (sp3086e-sp3088e) 35 37 39 41 43 45 47 49 51 53 55 -6 0 - 40 -2 0 0 20 40 60 80 100 te mp er atur e (o c) pr opagati on de la y (n s) t pl h t ph l c l =1 5p f, v id = 2v receiver propagation delay vs temperature (sp3083e-sp3085e) 11 5 12 0 12 5 13 0 13 5 14 0 14 5 15 0 15 5 -6 0 - 40 -2 0 0 20 40 60 80 100 te m per atur e (o c) pr opagat io n de la y (n s) t pl h t ph l c l =1 5p f, v id = 2v 70 80 90 100 110 120 -6 0 - 40 -2 0 0 20 40 60 80 100 te mp er atur e (o c) pr opagat io n de la y (n s) c l = 15pf , v id = 2v receiver average propagation delay vs temperature (sp3080e-sp3082e) 70 80 90 10 0 11 0 12 0 -6 0 - 40 -2 0 0 20 40 60 80 100 te m per at ur e (o c) pro paga ti on delay (n s) t pl h t ph l c l =1 5pf , v id = 2v receiver propagation delay vs temperature (sp3080e-sp3082e) 8 9 10 11 12 13 14 15 -6 0 - 40 -2 0 0 20 40 60 80 100 te mp er at ur e (o c) pro paga ti on dela y (n s) t pl h t ph l r l = 54 ,c l =5 0pf 10 10.5 11 11.5 12 12.5 13 13.5 -6 0 - 40 -2 0 0 20 40 60 80 10 0 te mp er atur e (o c) pr opagat io n de la y (n s) r l = 54 ,c l = 50p f
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 typical performance characteristics receiver average propagation delay vs temperature (sp3086e-sp3088e) 40 42 44 46 48 50 52 54 -60 -40 -20 0 20 40 60 80 100 temperature (oc) propagation delay (ns) c l =15pf, v id =2v propagation delay (ns) driver and receiver hot swap performance vs. vcc driver propagation delay (sp3080e-sp3082e) driver output waveform low to high (sp3080e-sp3082e) driver output waveform high to low (sp3080e-sp3082e)
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 2 typical performance characteristics driver and receiver waveform low to high (sp3080e-sp3082e) driver and receiver waveform high to low (sp3080e-sp3082e) driver and receiver waveform low to high (sp3083e-sp3085e) driver propagation delay (sp3083e-sp3085e) driver output waveform high to low (sp3083e-sp3085e) driver output waveform low to high (sp3083e-sp3085e)
3 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 typical performance characteristics driver and receiver waveform high to low (sp3083e-sp3085e) driver propagation delay (sp3086e-sp3088e) driver output waveform low to high (sp3086e-sp3088e) driver output waveforms high to low (sp3086e-sp3088e) driver and receiver waveform low to high (sp3086e-sp3088e) driver and receiver waveform high to low (sp3086e-sp3088e)
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 4 typical performance characteristics receiver propagation delay (sp3086e-sp3088e) receiver propagation delay (sp3080e-sp3082e) receiver propagation delay (sp3083e-sp3085e) figure . driver dc test circuit figure 2. receiver dc test circuit r/2 r/2 v oc d v cc v od di ou t r a b v id re test circuits
5 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 figure 3. driver propagation delay time test circuit and timing diagram y z d di r l 54? c l 50pf 3.3v v od vcc 0v di y z v o + v dif f v y ? v z 0v v o ? vcc/2 vcc/2 t plh t f t r v o 1/2v o 1/2v o t phl t skew = |t dplh - t dphl | t dplh t dphl 10% 90% 10% 90% test circuits figure 4. driver short circuit current limit test circuit a/y d di = 0 or vcc b/z de = 0 or vcc i os d 100? -7v to +12v v
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 6 figure 5. driver differential output test circuit figure 6. driver enable and disable times test circuit and timing diagram a/y b/z d di = 0 or vcc 60? de = 3.3v v od 375? 375? v cm generator 50? s1 r l = 500? out c l = 50pf d 0 or vcc z y di de out vcc/2 t zl , t zl (shdn) v om = (v ol + vcc)/2 t lz 0.25v vcc 0 0 test circuits
7 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 figure 7. driver enable and disable times test circuit and timing diagram figure 8. receiver propagation delay test circuit and timing diagram generator 50? s1 r l = 500? out c l = 50pf d 0 or vcc z y di vcc de vcc out vcc/2 t zl , t zl (shdn) v om = (v ol + vcc)/2 t lz 0.25v vcc 0 v ol ou t r a b v id re c l 15pf b a out t phl t plh +1v -1v v oh v ol 1.5v test circuits
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 8 figure 9. receiver enable and disable times test circuit figure 0. receiver enable and disabletiming diagram 1.5v -1.5v s3 a generato r 50? c l = 15pf r 1k? s1 s2 vcc b re 3v 1.5v 0v re out s1 is open, s2 is closed, s3 = 1.5 v v oh t zh , t zh(shdn) v oh /2 3v 0v 1.5 v v cc re out s1 is closed, s2 is open, s3 = -1.5v t zl , t zl(shdn ) v ol = v cc /2 v ol 3v 1.5v 0v re out s1 is open, s2 is closed, s3 = 1.5 v v oh t hz 0.25v 3v 0v 1.5v v cc re out s1 is closed, s2 is open, s3 = -1.5v t lz v ol 0.25 v test circuits
9 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 test circuits figure . transient over voltage tolerance test circuit note: test is performed to ensure survivability only. normal operation during transient is not specifed.
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 20 function tables receiving inputs output re de v a - v b ro 0 x -40mv 0 x -200mv 0 0 x open/shorted x high-z 0 x shutdown transmitting inputs outputs re de di y z x 0 x 0 0 0 0 x high-z 0 x shutdown sp3080e, sp3083e, sp3086e (full duplex) sp308e sp3084e, sp3087e (full duplex) transmitting input outputs di y z 0 0 0 open 0 receiving inputs output v a - v b ro -40mv -200mv 0 open/shorted sp3082e sp3085e, sp3088e (half duplex) transmitting inputs outputs re de di a b x 0 x 0 0 0 0 x high-z 0 x shutdown receiving inputs output re de v a - v b ro 0 x -40mv 0 x -200mv 0 0 x open/shorted x high-z 0 x shutdown note: receiver inputs -200mv < va - vb < -40mv, should be considered indeterminate product selector guide part number duplex data rate (mbps) shut-down receiver & driver enable trans on bus foot-print pin-compatible upgrade from: sp3080e full 0. 5 yes yes 256 sn7580 max3080 sp308e full 0. 5 no no 256 sn7579 max308 sp3082e half 0. 5 yes yes 256 sn7576 sp483, max3082 sp3083e full 0.5 yes yes 256 sn7580 max3083 sp3084e full 0.5 no no 256 sn7579 max3084 sp3085e half 0.5 yes yes 256 sn7576 max3085 sp3086e full 20 yes yes 256 sn7580 sp49, max3086 sp3087e full 20 no no 256 sn7579 sp490, max3087 sp3088e half 20 yes yes 256 sn7576 sp48, max3088
2 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 note: receiver inputs -200mv < va - vb < -40mv, should be considered indeterminate description detailed description sp3080e-sp3088e is a family of advanced rs-485/rs-422 transceivers. each contains one driver and one receiver. these devices feature fail-safe circuitry that guarantees a logic-high receiver output when the receiver inputs are open or shorted, or when they are connected to a terminated transmission line with all drivers disabled. sp3080e, sp3082e, sp3083e, sp3085e, sp3086e and sp3088e also feature a hot-swap capability allowing live insertion without error data transfer. the sp3080e, sp308 e and sp3082e fea - ture reduced slew-rate drivers that minimize emi and reduce refections caused by improp - erly terminated cables, allowing error-free data transmission up to 5kbps. the sp3083e, sp3084e and sp3085e also offer slew-rate limits allowing transmit speeds up to 500kbps. the sp3086e, sp3087e, sp3088e driver slew rates are not limited, making transmit speeds up to 20mbps possible. the sp3082e, sp3085e and sp3088e are half-duplex transceivers, while the sp3080e, sp308 e, sp3083e, sp3084e, sp3086e, and sp3087e are full duplex transceivers. all devices operate from a single 5.0v supply. drivers are output short-circuit current limited. thermal-shutdown circuitry protects drivers against excessive power dissipation. when ac - tivated, the thermal-shutdown circuitry places the driver outputs into a high-impedance state. receiver input filtering sp3080e-sp3085e receivers incorporate input fltering in addition to input hysteresis. this fl - tering enhances noise immunity with differential signals that have very slow rise and fall times. receiver propagation delay increases due to this fltering. advanced fail safe ordinary rs485 differential receivers will be in an indeterminate state whenever a - b is less than 200mv. this situation can occur when - ever the data bus is not being actively driven. the advanced failsafe feature of the sp3080e family guarantees a logic-high receiver output if the receivers differential inputs are shorted, open-circuit, or if they are shunted by a termi - nation resistor. the receiver thresholds of the sp3080e family, are very precise and offset by at least a 40mv noise margin from ground. this results in a logic-high receiver output at zero volts input dif - ferential while maintaining compliance with the eia/tia-485 standard of 200mv. hot-swap capability when a micro-processor or other logic device undergoes its power-up sequence its logic- outputs are typically at high impedance. in this state they are unable to drive the de and sig - nals to a defned logic level. during this period, noise, parasitic coupling or leakage from other devices could cause standard cmos enable in - puts to drift to an incorrect logic level. if circuit boards are inserted into an energized backplane (commonly called live insertion or hot-swap) power may be suddenly applied to all circuits. without the hot-swap capability, this situation could improperly enable the transceiv - ers driver or receiver, driving invalid data onto shared busses and possibly causing driver con - tention or device damage. the sp3080e family contains a special power- on-reset circuit that holds de low and re high for approximately 0 microseconds. after this initial power-up sequence the hot-swap circuit becomes transparent, allowing for normal, un- skewed enable and disable timings. 15kv esd protection esd-protection structures are incorporated on all pins to protect against electrostatic dis - charges encountered during handling and as - sembly. the driver output and receiver inputs of the sp3080e family have extra protection against static electricity. exar uses state of the art structures to protect these pins against esd of 5kv without damage. the esd structures withstand high esd in all states: normal opera - tion, shutdown, and powered down. after an esd event, the sp3080e - sp3088e keeps working without latch-up or damage. esd protection can be tested in various ways. the transmitter outputs and receiver inputs of
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 22 description the sp3080e - sp3088e are characterized for protection to the following limits: 5kv using the human body model 8kv using the contact discharge method specifed in iec 61000-4-2 5kv air-gap esd test conditions esd performance depends on a variety of conditions. contact exar for a reliability report that documents test setup, methodology and results. iec 61000-4-2 the iec 6 000-4-2 standard covers esd test - ing and performance of fnished equipment. however, it does not specifcally refer to inte - grated circuits. the sp3080e family helps you design equipment to meet iec 61000-4-2, with - out sacrifcing board space and cost for exter - nal esd-protection components. the major difference between tests done using the human body model and iec 6 000-4-2 is a higher peak current in iec 6 000-4-2 series resistance is lower in the iec 6 000-4-2 model. hence, the esd withstand voltage measured to iec 6 000-4-2 is generally lower than that measured using the human body model. the air-gap test involves approaching the de - vice with a charged probe. the contact dis - charge method connects the probe to the de - vice before the probe is energized. machine model the machine model for esd tests all pins using a 200pf storage capacitor and zero discharge resistance. the objective is to emulate the stress caused when i/o pins are contacted by handling equipment during test and assembly. 256 transceivers on the bus the standard rs-485 receiver input impedance is 12k (1 unit load). a standard driver can drive up to 32 unit loads. the sp3080e fam - ily of transceivers has only a /8th unit load re - ceiver input impedance (96k), thereby allow - ing eight times as many, up to 256, transceivers to be connected in parallel on a communication line. any combination of these devices and oth - er rs-485 transceivers up to a total of 32 unit loads may be connected to the line. low power shutdown mode low-power shutdown mode is initiated by bring - ing both re high and de low simultaneously. while in shutdown devices typically draw only 50na of supply current. de and re may be tied together and driven by a single control signal. devices are guaranteed not to enter shutdown if re is high and de is low for less than 50ns. if the inputs are in this state for at least 600ns, the parts are shutdown. enable times t zh and t zl apply when the part is not in low-power shutdown state. enable times t zh ( shdn ) and t zl ( shdn ) apply when the parts are shut down. the drivers and receivers take longer to become enabled from low power shut - down mode t zl ( shdn ) and t zl ( shdn ) than from driver/receiver-disable mode (t zh , t zl ). driver output protection two mechanisms prevent excessive output cur - rent and power dissipation caused by faults or by bus contention. first, a driver-current limit on the output stage provides immediate protec - tion against short circuits over the whole com - mon-mode voltage range. second, a thermal- shutdown circuit forces the driver outputs into a high-impedance state if junction temperature becomes excessive. line length, emi, and reflections sp3080e - sp3085e feature controlled slew- rate drivers that minimize emi and reduce refec - tions caused by improperly terminated cables. sp3080e - sp3083e driver rise and fall times are limited to no faster than 667ns, allowing er - ror-free data transmission up to 5kbps. the sp3083e, sp3084e and sp3085e offer some - what higher driver output slew-rate limits, allow - ing transmit speeds up to 500kbps. the rs-485/rs-422 standard covers line lengths up to 4,000ft. maximum achievable line length is a function of signal attenuation and noise. use of slew-controlled drivers such as the sp3080e-sp3086e may help to reduce crosstalk interference and permit communica - tion over longer transmission lines.
23 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 description termination prevents refections by eliminating the impedance mismatches on a transmission line. line termination is typically used if rise and fall times are shorter than the round-trip signal propagation time. slew-limited drivers may reduce or eliminate the need for cable ter - mination in many applications. h a l f - d u p l e x n e t w o r k b i - d i r e c t i o n a l f u l l - d u p l e x n e t w o r k r e p e a t e r ( o p t i o n a l ) r e p e a t e r ( o p t i o n a l ) po i n t to multi - poi n t with repeater typical a pplication s: half-duplex network bi-directional full-duplex network point to multi-point repeater repeater (optional)
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 24
25 exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826
exar corporation 48720 kato road, fremont ca, 94538 ? 50-668-70 7 ? www.exar.com sp3080e-sp3088e_0_0826 26 ordering information part number lead free tape & reel temperature range package type sp3080een -l /tr from -40 to +85 0 c 4 pin nsoic sp3081een -l /tr from -40 to +85 0 c 8 pin nsoic sp3082een -l /tr from -40 to +85 0 c 8 pin nsoic sp3083een -l /tr from -40 to +85 0 c 4 pin nsoic sp3084een -l /tr from -40 to +85 0 c 8 pin nsoic sp3085een -l /tr from -40 to +85 0 c 8 pin nsoic sp3086een -l /tr from -40 to +85 0 c 4 pin nsoic sp3087een -l /tr from -40 to +85 0 c 8 pin nsoic sp3088een -l /tr from -40 to +85 0 c 8 pin nsoic all packages are available as lead free (rohs compliant). to order add -l suffx to part number. for tape and reel add /tr. reel quantity is 2,500 for nsoic. example: sp3082een-l/tr = lead free and tape and reel. sp3082een/tr = standard with tape and reel. revision history date revision description 2/22/07 m legacy sipex datasheet 06/23/09 .0.0 convert to exar format and change revision to .0.0. 08/26/ .0. correct type error to vcc range on page 4 from vcc = 5.0v +/-5% to vcc = 5.0v +/- 0%. add +/-65v transient over voltage tolerance to abs maximum ratings and add figure test circuit. notice exar corporation reserves the right to make changes to any products contained in this publication in order to improve design, performance or reliabil - ity. exar corporation assumes no representation that the circuits are free of patent infringement. charts and schedules contained herein are only for illustration purposes and may vary depending upon a user's specifc application. while the information in this publication has been carefully checked; no responsibility, however, is assumed for inaccuracies. exar corporation does not recommend the use of any of its products in life support applications where the failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to signifcantly af fect its safety or effectiveness. products are not authorized for use in such applications unless exar corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized ; (b) the user assumes all such risks; (c) potential liability of exar corporation is adequately protected under the circumstances. copyright 20 exar corporation datasheet august 20 for technical support please email exar's serial technical support group at: serialtechsupport@exar.com reproduction, in part or whole, without the prior written consent of exar corporation is prohibited.

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