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________________general description the max3093e/max3094e are rugged, low-power, quad, rs-422/rs-485 receivers featuring electrostatic discharge (esd) protection for use in harsh environ- ments. all receiver inputs are protected to ?5kv using iec 1000- 4-2 air-gap discharge, ?kv using iec 1000- 4-2 contact discharge, and ?5kv using the human body model. the max3093e operates from a +5v sup- ply, while the max3094e operates from a +3.3v supply. receiver propagation delays are guaranteed to within ?ns of a predetermined value , thereby ensuring device-to-device matching across production lots. the devices feature a 1na low-power shutdown mode in which the receiver outputs are high impedance. when active, these receivers have a fail-safe feature that guarantees a logic-high output if the input is open circuit. they also have a quarter-unit-load input imped- ance that allows 128 receivers on a bus. the max3093e/max3094e are pin-compatible, low- power upgrades to the industry-standard ?4c86. they are available in space-saving tssop, narrow so, and pdip packages. ________________________applications telecommunications equipment rugged rs-422/rs-485/rs-423 bus receiver receivers for esd-sensitive applications level translators ____________________________features ? esd protection ?5kv?ec 1000-4-2 air-gap discharge ?kv?ec 1000-4-2 contact discharge ?5kv?uman body model ? guaranteed propagation-delay tolerance between all ics ?ns (max3093e) ?0ns (max3094e) ? single +3v operation (max3094e) single +5v operation (max3093e) ? 16-pin tssop ? 10mbps data rate ? allow up to 128 receivers on the bus ? 1na low-power shutdown mode ? 2.4ma operating supply current ? pin-compatible upgrades to 34c86 max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers ________________________________________________________________ maxim integrated products 1 16 15 14 13 12 11 10 9 1 2 3 4 5 6 7 8 a- v cc b- b+ yb enbd yd d+ d- top view max3093e max3094e tssop/so/dip a+ ya c+ enac yc c- gnd c a b d pin configuration ya yb yc yd a+ a- b+ b- c+ c- d+ d- max3093e max3094e v cc gnd enbd enac a b c d ________________functional diagram 19-1779; rev 2; 10/02 part max3093e cue max3093ecse MAX3093ECPE 0? to +70? 0? to +70? 0? to +70? temp range pin-package 16 tssop 16 narrow so 16 plastic dip _______________ordering information max3093eeue max3093eese max3093eepe -40? to +85? -40? to +85? -40? to +85? 16 tssop 16 narrow so 16 plastic dip max3094e cue max3094ecse max3094ecpe 0? to +70? 0? to +70? 0? to +70? 16 tssop 16 narrow so 16 plastic dip max3094eeue max3094eese max3094eepe -40? to +85? -40? to +85? -40? to +85? 16 tssop 16 narrow so 16 plastic dip for pricing, delivery, and ordering information, please contact maxim/dallas direct! at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com.
max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers 2 _______________________________________________________________________________________ absolute maximum ratings dc electrical characteristics?ax3093e (v cc = +5v ?%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.0v, t a = +25?.) (note 1) stresses beyond those listed under ?bsolute maximum ratings?may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specificatio ns is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. supply voltage (v cc ).............................................................+7v control input voltage (enac, enbd).........-0.3v to (v cc + 0.3v) receiver input voltage (_+, _-)............................................?5v receiver output voltage (y_).....................-0.3v to (v cc + 0.3v) output short-circuit duration (y_, one output) ..........continuous continuous power dissipation (t a = +70?) tssop (derate 9.4mw/? above +70?) ....................755mw so (derate 8.7mw/? above +70?) ...........................696mw plastic dip (derate 10.5mw/? above +70?) ............762mw operating temperature ranges max309_ec_ _ ..................................................0? to +70? max309_ee_ _ ...............................................-40? to +85? junction temperature ......................................................+150? storage temperature range .............................-65? to +160? lead temperature (soldering, 10s) .................................+300? v cm = 0 ie c1000-4-2 contact discharge -7v v cm 12v ie c1000-4-2 air-gap discharge human body model -7v v cm 12v 0 v out v cc , output enabled 0 v out v cc , output disabled i out = 4ma, v id = -200mv, output enabled, figure 1 output disabled i out = -4ma, v id = 200mv, output enabled, figure 1 no load, output enabled conditions ? ?5 kv ?5 esd protection (note 2) ? 0.001 10 ma 2.4 3.5 i cc supply current mv 45 mv -200 200 v th receiver differential input threshold receiver input hysteresis k 48 r in receiver input resistance ma ? ?5 i osr output short-circuit current ? ? i ozr three-state current at receiver output v 0.4 v ol receiver output low voltage ? ? enable input current (enac/enbd) v 2.0 v ih enable input high voltage (enac/enbd) v 0.8 v il enable input low voltage (enac/enbd) v v cc - 1.5 v oh receiver output high voltage units min typ max symbol parameter ? 250 i in receiver input current (_+, _-) v cc = 0 or 5.25v v in = 12v -200 v in = -7v
max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers _______________________________________________________________________________________ 3 dc electrical characteristics?ax3094e (v cc = +3.0v to +3.6v, t a = t min to t max , unless otherwise noted. typical values are at v cc = +3.3v, t a = +25?.) (note 1) switching characteristics?ax3093e (v cc = +5v ?%, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.0v, t a = +25?.) v cm = 0 -7v v cm 12v i out = -1.5ma, v id = 200mv, output enabled, figure 1 conditions mv 45 mv -200 200 v th receiver differential input threshold receiver input hysteresis ? ? enable input current (enac/enbd) v 2.0 v ih enable input high voltage (enac/enbd) v 0.8 v il enable input low voltage (enac/enbd) v v cc - 0.4 v oh receiver output high voltage units min typ max symbol parameter ? 250 i in receiver input current (_+, _-) v cc = 0 or 3.6v v in = 12v -200 v in = -7v figure 2 ns -2 ?0 | v id | = 3v, figure 2 t sk propagation-delay skew (t plh - t phl ) v cc = +5v ?%, t a = t min to t max v cc = 5.25v v cc = 4.75v figure 3 figure 3 | v id | = 3v, figure 2, matched conditions t a = +85? t a = +25? t a = -40? t a = +85? figure 3 t a = +25? figure 3 conditions t a = -40? t plh , t phl input-to-output propagation delay ns t a = +70? 76 92 t a = +70? 80 96 mbps 10 f max maximum data rate ns 60 100 t hz output disable time from high level ns 60 100 t lz output disable time from low level 78 86 94 65 98 ns 600 800 t zh output enable time to high level ns 600 800 t zl output enable time to low level ns 16 device-to-device propagation- delay matching 68 76 84 71 79 87 65 73 81 82 90 98 74 82 90 units min typ max symbol parameter
max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers 4 _______________________________________________________________________________________ iec 1000-4-2 contact discharge iec 1000-4-2 air-gap discharge human body model outputs disabled no load, outputs enabled conditions ? ?5 kv ?5 esd protection (note 2) ? 0.001 10 ma 2.4 4.0 i cc supply current units min typ max symbol parameter dc electrical characteristics?ax3094e (continued) (v cc = +3.0v to +3.6v, t a = t min to t max , unless otherwise noted. typical values are at v cc = +3.3v, t a = +25?.) (note 1) v cc = +3.3v ?%, t a = t min to t max figure 3 figure 3 | v id | = 3v, figure 2, matched conditions figure 3 figure 3 conditions mbps 10 f max maximum data rate ns 80 180 t hz output disable time from high level ns 80 180 t lz output disable time from low level 88 98 108 69 123 ns 600 1000 t zh output enable time to high level ns 600 1000 t zl output enable time to low level ns 20 device-to-device propagation- delay matching 82 92 102 78 88 98 69 79 89 103 113 123 91 101 111 units min typ max symbol parameter switching characteristics?ax3094e (v cc = +3.0v to +3.6v, t a = t min to t max , unless otherwise noted. typical values are at v cc = +3.3v, t a = +25?.) note 1: all currents into the device are positive; all currents out of the device are negative. all voltages are referred to device ground, unless otherwise noted. note 2: receiver inputs (_+, _-). figure 2 ns -1 ?0 t sk propagation-delay skew (t plh - t phl ) t a = +85? t a = +25? t a = -40? t a = +85? t a = +25? t a = -40? r in receiver input resistance -7v v cm 12v k 48 v ol receiver output low voltage i out = 2.5ma, v id = -200mv, output enabled, figure 1 v 0.4 v cc = 3.60v v cc = 3.00v t plh , t phl input-to-output propagation delay ns t a = +70? 86 106 t a = +70? 100 120 | v id | = 3v, figure 2 i osr output short-circuit current 0 v out v cc , output enabled ma ? ?0 i ozr three-state current at receiver output 0 v out v cc , output disabled ? ?
max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers _______________________________________________________________________________________ 5 0 -10 -20 -30 -40 -50 02 1 345 output current vs. output low voltage max3093/94e-01 output low voltage (v) output current (ma) max3093e max3094e 0 15 10 5 20 25 30 02 1 345 output current vs. output high voltage max3093/94e-02 output high voltage (v) output current (ma) max3093e max3094e 0 0.3 0.2 0.1 0.4 0.5 0.6 0.7 0.8 0.9 1.0 -40 10 -15 35 60 85 output low voltage vs. temperature max3093/94e-03 temperature ( c) output low voltage (v) max3093e max3094e i out = 8ma 0 1 3 2 4 5 -40 10 -15 35 60 85 output high voltage vs. temperature max3093/94e-04 temperature ( c) output high voltage (v) max3093e max3094e i out = -8ma 70 80 100 90 110 120 -40 10 -15 35 60 85 max3093e propagation delay vs. temperature max3093/94e-07 temperature ( c) propagation delay (ns) ? v id ? = 3v c l = 15pf 2.0 2.2 2.6 2.4 2.8 3.0 -40 10 -15 35 60 85 supply current vs. temperature max3093/94e-05 temperature ( c) supply current (ma) max3093e/max3094e 0 5 10 15 20 -40 10 -15 35 60 85 shutdown supply current vs. temperature max3093/94e-06 temperature ( c) shutdown supply current (na) max3093e max3094e 80 110 100 90 120 130 140 -40 10 -15 35 60 85 max3094e propagation delay vs. temperature max3093/94e-08 temperature ( c) propagation delay (ns) ? v id ? = 3v c l = 15pf typical operating characteristics (v cc = +5v for max3093e, v cc = +3.3v for max3094e, t a = +25?, unless otherwise noted.)
max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers 6 _______________________________________________________________________________________ pin description name function 1 a- inverting receiver a input 2 a+ noninverting receiver a input pin 3 ya receiver a output. enabled when enac = high. ya will be logic high if a+ > a- by 200mv, and low if a+ < a- by 200mv. it will be logic high if a+ and a- remain floating. otherwise, the state is undetermined. ya goes high impedance when enac = low. 4 enac receiver output a and c enable high. a logic high on this input enables receivers a and c. 8 gnd ground 7 c- inverting receiver c input 6 c+ noninverting receiver c input 5 yc receiver c output. same functionality as ya. 13 yb receiver b output. same functionality as yd. 12 enbd receiver output b and d enable high. a logic high on this input enables receivers b and d. 11 yd receiver d output. enabled when enbd = high. yd will be logic high if d+ > d- by 200mv, and low if d+ < d- by 200mv. it will be a logic high if d+ and d- remain floating. otherwise, the state is undetermined. yd goes high impedance when enbd = low. 10 d+ noninverting receiver d input 9 d- inverting receiver d input time (200ns/div) shutdown timing max3093/94e toc09 max3093e y voltage 5v/div 2v/div 2v/div max3094e y voltage g voltage circuit of figure 3, s1 open, s2 closed, s3 = 1v typical operating characteristics (continued) (v cc = +5v for max3093e, v cc = +3.3v for max3094e, t a = +25?, unless otherwise noted.) 14 b+ noninverting receiver b input 15 b- inverting receiver b input 16 v cc positive supply
max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers _______________________________________________________________________________________ 7 r v oh i oh (-) i ol (+) v ol v id r t plh 1.5v out in 1.5v 3.0v 0 t phl v cc v cc /2 v cc /2 0 v id c l 15pf r out enac = v cc or enbd = v cc | v id | = 3v figure 2. receiver propagation delay figure 1. receiver v oh and v ol 3v 0 v oh 0 v cc /2 out 0.25v enac 1.5v 1.5v s1 open s2 closed s3 = 1v 3v 0 enac t hz v cc /2 t zl t zh v cc v ol 0.25v out s1 closed s2 open s3 = -1v t lz c l 15pf r +1v -1v v cc v id s1 s2 1k s3 enac, enbd enbd enbd figure 3. receiver enable and disable times
_______________detailed description 15kv esd protection as with all maxim devices, esd-protection structures are incorporated on all pins to protect against esds encoun- tered during handling and assembly. the max3093e/max3094e receiver inputs have extra protection against static electricity found in normal operation. maxim? engineers have developed state- of-the-art structures to protect these pins against ?5kv esd without damage. after an esd event, the max3093e/max3094e continue working without latchup. esd protection can be tested in several ways. the receiver inputs are characterized for protection to the following: ?5kv using the human body model ?kv using the contact discharge method specified in iec 1000-4-2 (formerly iec 801-2) ?5kv using the air-gap method specified in iec 1000-4-2 (formerly iec 801-2) esd test conditions esd performance depends on a number of conditions. contact maxim for a reliability report that documents test setup, methodology, and results. human body model figure 4a shows the human body model, and figure 4b shows the current waveform it generates when dis- charged into a low impedance. this model consists of a 100pf capacitor charged to the esd voltage of interest, which is then discharged into the device through a 1.5k resistor. iec 1000-4-2 since january 1996, all equipment manufactured and/or sold in the european community has been required to meet the stringent iec 1000-4-2 specification. the iec 1000-4-2 standard covers esd testing and performance of finished equipment; it does not specifically refer to inte- grated circuits. the max3093e/max3094e help you design equipment that meets level 4 (the highest level) of iec 1000-4-2, without additional esd-protection compo- nents. the main difference between tests done using the human body model and iec 1000-4-2 is higher peak current in iec 1000-4-2. because series resistance is lower in the iec 1000-4-2 esd test model (figure 5a), the esd-withstand voltage measured to this standard is gen- erally lower than that measured using the human body model. figure 5b shows the current waveform for the ?kv iec 1000-4-2 level 4 esd contact discharge test. the air-gap test involves approaching the device with a charge probe. the contact-discharge method connects the probe to the device before the probe is energized. machine model the machine model for esd testing uses a 200pf stor- age capacitor and zero-discharge resistance. it mimics the stress caused by handling during manufacturing and assembly. all pins (not just rs-485 inputs) require this protection during manufacturing. therefore, the machine model is less relevant to the i/o p orts than are the human body model and iec 1000-4-2. low-power shutdown mode the function tables show the functionality of the enable inputs. the max3093e/max3094e enter shutdown when enac and enbd are low. in shutdown, all out- puts go high impedance and the devices typically draw less than 1na. the devices exit shutdown by taking either enac or enbd high. the typical shutdown exit time is 600ns. max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers function tables output ya or yc device mode enac enbd (in+ - in-) on 1 x 200mv 1 on 1 x -200mv 0 1 x open 1 on 0 1 x high-z on 0 0 x high shutdown x = don? care, high-z = high impedance 8 _______________________________________________________________________________________ output yb or yd device mode enbd enac (in+ - in-) on 1 x 200mv 1 on 1 x -200mv 0 1 x open 1 on 0 1 x high-z on 0 0 x high-z shutdown
max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers _______________________________________________________________________________________ 9 t r = 0.7ns to 1ns 30ns 60ns t 100% 90% 10% i peak i charge-current limit resistor discharge resistance storage capacitor c s 100pf r c 1m r d 1.5k high- voltage dc source device under test figure 4a. human body esd test model figure 5b. iec 1000-4-2 esd-generator current waveform figure 4b. human body model current waveform i p 100% 90% 36.8% t rl time t dl current waveform peak-to-peak ringing (not drawn to scale) i r 10% 0 0 amperes charge-current limit resistor discharge resistance storage capacitor c s 150pf r c 50m to 100m r d 330 high- voltage dc source device under test figure 5a. iec 1000-4-2 esd test model
applications information propagation-delay matching the max3093e/max3094e exhibit propagation delays that are closely matched from one device to another, even between devices from different production lots. this feature allows multiple data lines to receive data and clock signals with minimal skewing with respect to each other. the max3093e receiver propagation delays are trimmed to a predetermined value ?ns, while the max3094e delays are trimmed to a predetermined value ?0ns. 128 receivers on the bus the standard rs-485 input impedance is 12k (one- unit load). the standard rs-485 transmitter can drive 32 unit loads. the max3093e/max3094e present a 1/4- unit-load input impedance (48k ), which allows up to 128 receivers on a bus. any combination of these rs- 485 receivers with a total of 32-unit loads can be con- nected to the same bus. fail-safe implementation the max3093e/max3094e receiver inputs guarantee a logic high output when the inputs are open circuit (no termination resistor used). this occurs when the trans- mitter is removed from the bus or when all transmitter outputs are high impedance. however, when the line is terminated and the transmitters are disabled, the differ- ential voltage between the _+ and _- inputs falls below the ?00mv rs-485 sensitivity threshold. consequent- ly, the outputs become undefined. to maintain a fail- safe receiver output while using a terminating resistor, input _+ must be biased at least 200mv above input b. the resistor-divider network shown in figure 6 is rec- ommended. max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers 10 ______________________________________________________________________________________ 1k 1k 150 max3093e max3094e v cc _+ _- chip information transistor count: 676 figure 6. external fail-safe implementation
max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers ______________________________________________________________________________________ 11 tssop4.40mm.eps package outline, tssop 4.40mm body 21-0066 1 1 i package information (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .)
max3093e/max3094e 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers 12 ______________________________________________________________________________________ package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) soicn .eps package outline, .150" soic 1 1 21-0041 b rev. document control no. approval proprietary information title: top view front view max 0.010 0.069 0.019 0.157 0.010 inches 0.150 0.007 e c dim 0.014 0.004 b a1 min 0.053 a 0.19 3.80 4.00 0.25 millimeters 0.10 0.35 1.35 min 0.49 0.25 max 1.75 0.050 0.016 l 0.40 1.27 0.394 0.386 d d min dim d inches max 9.80 10.00 millimeters min max 16 ac 0.337 0.344 ab 8.75 8.55 14 0.189 0.197 aa 5.00 4.80 8 n ms012 n side view h 0.244 0.228 5.80 6.20 e 0.050 bsc 1.27 bsc c h e e b a1 a d 0-8 l 1 variations:
maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 _____________________ 13 2002 maxim integrated products printed usa is a registered trademark of maxim integrated products. 15kv esd-protected, 10mbps, 3v/5v, low-power quad rs-422/rs-485 receivers max3093e/max3094e package information (continued) (the package drawing(s) in this data sheet may not reflect the most current specifications. for the latest package outline info rmation, go to www.maxim-ic.com/packages .) pdipn.eps

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