general description the MAX3209E is a complete, dual dte rs-232 serial port (6 transmitters, 10 receivers) for motherboards and desktop pcs that ensures compliance with the stringent esd requirements of the european community. the device minimizes board space and power consumption by eliminating the need for a negative power supply; it integrates two serial ports and a charge pump into a sin- gle 38-pin tssop package. the MAX3209E features a 50? low-power standby mode for compliance with system power-management requirements. during standby, while the device oper- ates from the single +3v to +5.5v logic supply, one receiver on each port remains active, allowing automatic system wake-up when peripheral communications resume. all transmitter outputs and 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, making the device ideal for use in harsh environments or mission-critical equip- ment. as a result of its robust charge-pump structure, the MAX3209E guarantees mouse driveability and true rs-232 operation at data rates up to 460kbps, ensuring compatibility with pc-to-pc communication software (such as laplink ). ________________________applications desktop pcs motherboards instruments equipment requiring iec 1000-4-2 compliance telecommunications network servers features two complete serial ports in a single 38-pin tssop package requires only +12v supply and logic supply (+3v to +5.5v) no negative supply required one receiver active per port in standby for system wake-up 460kbps data rate; laplink compatible enhanced esd protection 15kv?uman body model 8kv?ec 1000-4-2, contact discharge 15kv?ec 1000-4-2, air-gap discharge low 50 a standby current operates with either +3v or +5v logic guaranteed mouse driveability small 0.1 f capacitors flow-through pinout MAX3209E 15kv esd-protected, 12v, dual rs-232 serial port with low-power standby for motherboards/desktops ________________________________________________________________ maxim integrated products 1 19-1471; rev 3; 9/01 part MAX3209Ecuu MAX3209Eeuu -40? to +85? 0? to +70? temp. range pin-package 38 tssop 38 tssop ordering information typical operating circuit appears at end of data sheet. pin configurations continued at end of data sheet. laplink is a trademark of traveling software. 40 36 37 38 39 18 21 23 22 24 25 19 20 16 17 6 5 4 3 2 1 7 8 9 10 11 12 13 14 15 26 27 28 29 30 31 32 33 34 35 n.c. r7out r1out MAX3209E 6 x 6 qfn top view r2out r3out r4out r5out r5in r4in r3in r2in r1in r6out r9out r8out r10in r10out r8in r9in r6in r7in t3out t2out t1out v- c- gnd t4out t5out t6out n.c. t6in t5in t4in c+ v dd v stby t1in t2in t3in pin configurations MAX3209Eegl -40? to +85? 6 ? 6 40 qfn 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.
MAX3209E 15kv esd-protected, 12v, dual rs-232 serial port with low-power standby for motherboards/desktops 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v dd = +10.8v to +13.2v, v stby = +3v to +5.5v, c1 = c2 = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?, v dd = +12v, v stby = +3.3v.) 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. v dd .........................................................................-0.3v to +15v v stby ....................................................................... -0.3v to +7v v- ........................................................................... +0.3v to -15v input voltages t_in ......................................................................-0.3v to +7v r_in .................................................................................?0v output voltages t_out..............................................................................?5v r_out.................................................-0.3v to (v stby + 0.3v) short-circuit duration t_out (one at a time) ............................................continuous r_out (one at a time)............................................continuous continuous power dissipation (t a = +70?) tssop (derate 11.8mw/? above +70?) ..................941mw qfn 6 ? 6mm (derate 23.2mw/? above +70?)......1860mw operating temperature ranges MAX3209Ec_ _ ...................................................0? to +70? MAX3209Ee_ _ ................................................-40? to +85? storage temperature range ............................-65? to +150? lead temperature (soldering, 10s) ................................+300? t a = +25? v dd = v stby = 0, v out = ?v v t_out = 0 transmitter input at gnd t_in, v stby = +3v to +5.25v all transmitter outputs loaded with 3k ? to gnd t_in v dd = +12v, no load, all transmitter inputs at v stby , all receiver inputs at v stby or uncon- nected r_out conditions v 2.4 rs-232 input threshold high v 0.4 rs-232 input threshold low v -25 25 receiver input voltage range ? 300 transmitter output resistance ma ?0 60 rs-232 output short-circuit current v output voltage swing ?.0 v v stby - 0.3 v ohr output voltage high 10.8 13.2 v dd ? 25 input pull-up current v 2.1 v iht input logic threshold high v 0.4 v ilt input logic threshold low 3 5.5 stby 0.5 1 i dd ma supply current units min typ max symbol parameter v stby = 3.3v v 0.2 1 rs-232 input hysteresis t a = +25? k ? 357 rs-232 input resistance t a = +25? operating voltage range v v dd = 0, v stby = +3.3v, no load, all transmit- ter inputs at v stby , all receiver inputs at v stby or unconnected 50 100 i stby ? r_out; i sink = 1.6ma v 0.4 v olr output voltage low v dd = 0, v stby = 5v ? 0.05 ? receiver output leakage current v stby - 0.6 i source = 40? i source = 1ma rs-232 receiver inputs rs-232 transmitter outputs transmitter logic inputs dc characteristics receiver logic outputs
MAX3209E 15kv esd-protected, 12v, dual rs-232 serial port with low-power standby for motherboards/desktops _______________________________________________________________________________________ 3 electrical characteristics (continued) (v dd = +10.8v to +13.2v, v stby = +3v to +5.5v, c1 = c2 = 0.1?, t a = t min to t max , unless otherwise noted. typical values are at t a = +25?, v dd = +12v, v stby = +3.3v.) c l = 1000pf iec 1000-4-2 (contact discharge) 1 human body model t phlt ? sr transmitter output propagation delay, high to low v/? transmitter output slew rate iec 1000-4-2 (air-gap discharge) c l = 150pf 0.4 1 conditions t phlr ? r l = 3k ? to 7k ? , c l = 50pf to 1000pf, two transmitters switching receiver output propagation delay, high to low 460 dr kbps data rate ? ?5 61230 r l = 3k ? to 7k ? , v stby = 3.3v, c l = 50pf to 470pf, t a = +25?, measured from +3v to -3v or -3v to +3v kv ?5 esd protection units min typ max symbol parameter c l = 1000pf 1 t plht ? transmitter output propagation delay, low to high t1in = t2in = gnd, t3in = v cc, t3out loaded with 3k ? to gnd, t1out and t2out loaded with 2.5ma each +6 -5 v mouse driveability c l = 150pf 0.4 1 t plhr ? receiver output propagation delay, low to high typical operating characteristics (v stby = +5v, v dd = +12v, c1 = c2 = 0.1?, t a = +25?, unless otherwise noted.) 0 15 10 5 20 25 30 0 2000 1000 3000 4000 5000 supply current vs. load capacitance MAX3209E-02 load capacitance (pf) supply current (ma) 120kbps 240kbps 460kbps 2 transmitters at data rate 4 transmitters at 1/16 data rate 3k ? + c l 5 15 10 25 20 30 35 10.8 12.0 11.4 12.6 13.2 supply current vs. supply voltage MAX3209E-01 supply voltage (v) supply current (ma) 460kbps 240kbps 120kbps c1 = c2 = 0.1 f 2 transmitters at data rate 4 transmitters at 1/16 data rate all transmitters at 3k ? + 1000pf 41230 r l = 3k ? to 7k ? , v stby = 3.3v, c l = 50pf to 1000pf, t a = +25?, measured from +3v to -3v or -3v to +3v esd characteristics transmitter timing characteristics (figure 1) receiver timing characteristics
MAX3209E 15kv esd-protected, 12v, dual rs-232 serial port with low-power standby for motherboards/desktops 4 _______________________________________________________________________________________ pin description typical operating characteristics (continued) (v stby = +5v, v dd = +12v, c1 = c2 = 0.1?, t a = +25?, unless otherwise noted.) 0 0.1 0.2 0.3 0.4 0.5 0.6 02 1 3456789 receiver output low voltage vs. sink current MAX3209E-03 i sink (ma) receiver output low voltage (v) 0 1.5 1.0 0.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 010 5 15202530 receiver output high voltage vs. source current MAX3209E-04 i source (ma) receiver output high voltage (v) pin tssop qfn name function 1 5, 15 19 11 15, 36 40 r_out ttl/cmos receiver outputs 6, 7, 8, 12, 13, 14 1, 2, 3, 7, 8, 9 t_in ttl/cmos transmitter inputs 94v stby standby power supply for r5 and r10 10 5 v dd +12v single-supply voltage 11 6 c+ positive terminal of the inverting charge-pump capacitor 20 24, 28 34 16 20, 31 35 r_in rs-232 receiver inputs 25, 26, 27, 31, 32, 33 22, 24, 28, 30 t_out rs-232 transmitter outputs 28 25 gnd ground (for qfn package, connect the exposed pad and corner tabs to gnd) 29 26 c- negative terminal of the inverting charge-pump capacitor 30 27 v- -12v generated by the inverting charge pump 10, 21 n.c. no connection. not internally connected.
detailed description 15kv esd protection as with all maxim devices, esd-protection structures are incorporated on all pins to protect against electro- static discharges (esd) encountered during handling and assembly. the MAX3209E driver outputs and receiver inputs have extra protection against static electricity found in normal operation. maxim s engineers developed state-of-the-art structures to protect these pins against 15kv esd, without damage. after an esd event, the ma x3209e continues working without latchup. esd protection can be tested in several ways. the transmitter outputs and receiver inputs are character- ized for protection to the following: 1) 15kv using the human body model 2) 8kv using the contact-discharge method specified in iec 1000-4-2 (formerly iec 801-2) 3) 15kv 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 2a shows the human body model, and figure 2b 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, MAX3209E 15kv esd-protected, 12v, dual rs-232 serial port with low-power standby for motherboards/desktops _______________________________________________________________________________________ 5 t f2 t f1 t phl t plh t r1 t r2 1.5v 3.0v 0 0 driver input v out v oh v ol 3.3v 3.0v -3.0v -3.3v r l c l signal generator figure 1. slew-rate test circuit and timing diagram charge-current limit resistor discharge resistance storage capacitor c s 100pf r c 1m ? r d 1500 ? high- voltage dc source device under test 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 3a. iec 1000-4-2 esd test model figure 2b. human body model current waveform figure 2a. human body esd test model
MAX3209E 15kv esd-protected, 12v, dual rs-232 serial port with low-power standby for motherboards/desktops 6 _______________________________________________________________________________________ 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 specifica- tion. the iec 1000-4-2 standard covers esd testing and performance of finished equipment; it does not specifically refer to integrated circuits. the MAX3209E helps you design equipment that meets level 4 (the highest level) of iec 1000-4-2, without additional esd- protection components. 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 3a), the esd withstand voltage measured to this standard is generally lower than that measured using the human body model. figure 3b shows the current waveform for the 8kv 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. of course, all pins (not just rs-232 inputs and outputs) require this protection during man- ufacturing. therefore, the machine model is less rele- vant to the i/o ports than are the human body model and iec 1000-4-2. applications information r5 and r10 active in standby mode the MAX3209E is placed in standby mode when v dd is not present, provided that v stby remains at +3v to +5.5v. in standby mode, receivers r5 and r10 remain active, consuming 100a max while unloaded. standby mode allows activity to be sensed on the serial ports so that main power can be restored by the power-man- agement unit, as shown in figure 4. layout considerations use proper layout to ensure other devices on your board are not damaged in an esd strike. currents as figure 4. MAX3209E in standby mode power-management unit v stby v dd gnd r5 r10 r_ t_ all other receivers inactive all transmitters inactive +12v super i/o MAX3209E t r = 0.7ns to 1ns 30ns 60ns t 100% 90% 10% i peak i figure 3b. iec 1000-4-2 esd-generator current waveform system power- supply voltage (v) v stby supply voltage (v) 3.3 3.3 compatibility compatible with all cmos families. 5 5 compatible with all ttl and cmos fami- lies. 3.3 5 compatible with act and hct cmos, and with ac, hc, or cd4000 cmos. table 1. logic family compatibility with various supply voltages
high as 60a can instantaneously pass into ground, so be sure to minimize the ground-lead return path to the power supply. a separate return path to the power sup- ply is recommend. trace widths should be greater than 40 mils. bypass v dd and v stby with 0.1f capacitors as close to the part as possible to ensure maximum esd protection. the MAX3209E is not sensitive to power-supply sequencing, and therefore requires no external protec- tion diodes. interconnection with 3v and 5v logic the MAX3209E can directly interface with various 3v and 5v logic families, including act and hct cmos. see table 1 for more information on possible combina- tions of interconnections. mouse driveability the MAX3209E has been specifically designed to power serial mice while operating from low-voltage power supplies. it has been tested with leading mouse brands from manufacturers such as microsoft and logitech. the MAX3209E successfully drove all serial mice tested and met their respective current and volt- age requirements. chip information transistor count: 774 MAX3209E 15kv esd-protected, 12v, dual rs-232 serial port with low-power standby for motherboards/desktops _______________________________________________________________________________________ 7 rs-232 interconnecting cable t1 t2 t3 t4 t5 r1 r2 t3 t4 t5 r3 r4 r5 r8 r9 r10 r2 r1 r3 t1 t2 ttl/cmos logic i/o ttl/cmos logic i/o mouse v+ gnd v ss gnd c1+ c1- v- 0.1 f c1 0.1 f 0.1 f c2 v+ v- tx t6 r6 -12v 0.1 f 0.1 f 0.1 f +5v v stby v dd max3186 MAX3209E v cc v dd +12v +5v +12v 0.1 f r7 typical operating circuit 37 36 35 34 33 32 31 30 29 28 27 26 25 24 2 3 4 5 6 7 8 9 10 11 12 13 14 15 r4in r3in r2in r1in t3out t2out r6in t1out v- c- gnd t4out t5out t6out r6out t6in t5in t4in c+ v dd v stby t1in t2in t3in r1out r2out r3out r4out 38 1 r5in r5out tssop top view MAX3209E 23 22 21 20 16 17 18 19 r10in r7in r8in r9in r10out r9out r8out r7out pin configurations (continued)
MAX3209E 15kv esd-protected, 12v, dual rs-232 serial port with low-power standby for motherboards/desktops 8 _______________________________________________________________________________________ tssop, 4.40mm.eps ________________________________________________________package information
15kv esd-protected, 12v, dual rs-232 serial port with low-power standby for motherboards/desktops MAX3209E 36l,40l, qfn.eps package information (continued) _______________________________________________________________________________________ 9
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. 10 __________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 (408) 737-7600 ? 2001 maxim integrated products printed usa is a registered trademark of maxim integrated products. MAX3209E 15kv esd-protected, 12v, dual rs-232 serial port with low-power standby for motherboards/desktops package information (continued)
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