general description the max3188e/MAX3189E single rs-232 transmitters in a sot23-6 package are for space- and cost-con- strained applications requiring minimal rs-232 commu- nications. these devices consume only 150? of supply current from ?.5v to ?v supplies. they fea- ture a shutdown input that reduces current consump- tion to only 1? and forces the transmitter output into a high- impedance state. rs-232 data transmission is guar- anteed up to 250kbps with the max3188e and up to 1mbps with the MAX3189E. the max3188e/MAX3189E are eia/tia-232 transmitters that convert cmos/ttl logic levels to rs-232-compliant signals. the transmitter output is protected to ?5kv using the iec 1000-4-2 air-gap discharge method, to ?kv using the iec 1000-4-2 contact discharge method, and to ?5kv per the human body model, ensuring strict compliance with international standards. the max3188e/MAX3189E transmitters have a standard inverting output. applications diagnostic ports telecommunications networking equipment set-top boxes digital cameras hand-held equipment features small 6-pin sot23 package esd-protected rs-232 output ?5kv per human body model ?kv per iec 1000-4-2, contact discharge ?5kv per iec 1000-4-2, air-gap discharge 150? operating supply current shutdown reduces supply current to 1? guaranteed data rate 1mbps (MAX3189E) 250kbps (max3188e) three-state rs-232 transmitter output no external components max3188e/MAX3189E 15kv esd-protected, 1mbps, 1a rs-232 transmitters in sot23-6 ________________________________________________________________ maxim integrated products 1 gnd tout tin 16 v cc 5 v ee shdn max3188e MAX3189E sot23-6 top view 2 34 shdn v cc v ee tin gnd tout max3188e MAX3189E 1 6 3 2 4 5 c bypass1 0.1 f c bypass2 0.1 f -5.4v +5.4v capacitors may be polarized or unpolarized. typical operating circuit 19-1604; rev 1; 3/00 pin configuration ordering information aahe aahd top mark 6 sot23-6 6 sot23-6 pin- package temp. range -40? to +85? -40? to +85? MAX3189E eut-t max3188e eut-t part for price, delivery, and to place orders, please contact maxim distribution at 1-888-629-4642, or visit maxim? website at www.maxim-ic.com.
max3188e/MAX3189E 15kv esd-protected, 1mbps, 1a rs-232 transmitters in sot23-6 2 _______________________________________________________________________________________ absolute maximum ratings electrical characteristics (v cc = +4.5v to +6v, v ee = -4.5v to -6v, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.4v, v ee = -5.4v, and t a = +25?.) (note 2) 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. note 1: v cc and v ee can have maximum magnitudes of 7v, but their absolute difference cannot exceed 13v. v cc to gnd (note 1) ................................................-0.3v to +7v v ee to gnd (note 1).................................................+0.3v to -7v v cc to v ee (note 1) .............................................................+13v tin, shdn to gnd ...................................................-0.3v to +7v tout to gnd ( shdn = gnd)..........................................?3.2v tout to gnd ( shdn = v cc ) ................................................?v output short-circuit duration.....................................continuous continuous power dissipation (t a = +70?) 6-pin sot23 (derate 8.7mw/? above +70?)..........691mw operating temperature range ...........................-40? to +85? junction temperature ......................................................+150? storage temperature range .............................-65? to +150? lead temperature (soldering, 10s) .................................+300? max3188e MAX3189E max3188e MAX3189E max3188e r l = 3k ? to 7k ? , c l = 150pf to 1000pf, measured from -3v to +3v or +3v to -3v, v cc = 5.4v, v ee = -5.4v, t a = +25? | t phl - t plh | , figure 1 r l = 3k ? , c l = 1000pf v cc = v ee = 0, v tout = ?v v cc = 5.4v, v ee = -5.4v, r l = 3k ? v shdn = 5v v shdn = 5v v shdn = 0 v cc = 4.5v, v ee = -4.5v, r l = 3k ? conditions 24 150 v/? 630 transition-region slew rate 25 MAX3189E ns 100 t ts transmitter skew 1 mbps 0.25 maximum data rate ? ?5 i tout output leakage current ma ?5 ?0 output short-circuit current ? 300 r tout output resistance ? v ?.7 v tout output voltage swing v -6 -4.5 v ee negative supply voltage v 4.5 6 v cc positive supply voltage mv 100 tin input hysteresis ? ?.01 ? input leakage v 2.0 v ih input logic threshold high v 0.8 v il input logic threshold low ? 170 i cc positive supply current ? 45 i ee negative supply current ? 0.2 1 shutdown supply current units min typ max symbol parameter ? 2 t en transmitter enable time v out = ?2v; v cc = v ee = 0 or v cc = 5.4v, v ee = -5.4v; shdn = 0 dc characteristics input logic (tin, shdn) transmitter outputs timing characteristics
max3188e/MAX3189E 15kv esd-protected, 1mbps, 1a rs-232 transmitters in sot23-6 _______________________________________________________________________________________ 3 0 1.0 0.5 1.5 2.0 2.5 00.4 0.3 0.1 0.2 0.5 0.6 0.7 0.8 0.9 1.0 supply current vs. data rate (c l = 150pf) max3188e/9e toc01 data rate (mbps) supply current (ma) i cc (MAX3189E) i ee (MAX3189E) i ee (max3188e) i cc (max3188e) 0 4 3 2 1 5 6 7 0 0.4 0.3 0.1 0.2 0.5 0.6 0.7 0.8 0.9 1.0 supply current vs. data rate (c l = 1000pf) max3188e/9e toc02 data rate (mbps) supply current (ma) MAX3189E max3188e 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 0 500 1000 1500 2000 2500 max3188e supply current vs. output capacitance max3188e/9e toc03 output capacitance (pf) supply current (ma) 250kbps 120kbps 40kbps 0 4 2 8 6 12 10 14 0 1000 500 1500 2000 2500 MAX3189E supply current vs. output capacitance max3188e/9e toc04 output capacitance (pf) supply current (ma) 500kbps 240kbps 40kbps 1mbps 0 4 2 8 6 12 10 14 0 1000 500 1500 2000 2500 max3188e slew rate vs. output capacitance max3188e/9e toc05 output capacitance (pf) slew rate (v/ s) -slew +slew 0 20 10 50 40 30 80 70 60 90 0 1000 500 1500 2000 2500 MAX3189E slew rate vs. output capacitance max3188e/9e toc06 output capacitance (pf) slew rate (v/ s) -slew +slew typical operating characteristics (v cc = +5.4v, v ee = -5.4v, r l = 3k ? , t a = +25?, unless otherwise noted.) electrical characteristics (continued) (v cc = +4.5v to +6v, v ee = -4.5v to -6v, t a = t min to t max , unless otherwise noted. typical values are at v cc = +5.4v, v ee = -5.4v, and t a = +25?.) (note 2) note 2: all devices are 100% tested at t a = +25?. all limits over temperature are guaranteed by design. parameter symbol min typ max units ?5 ? tout ?5 kv conditions human body model iec 1000-4-2 contact discharge iec 1000-4-2 air-gap discharge esd protection
detailed description the max3188e/MAX3189E are eia/tia-232 transmitters that convert cmos/ttl logic levels to rs-232 signals. they operate on ?.5v to ?v supplies and feature enhanced electrostatic discharge protection (see esd protection ). the max3188e guarantees a 250kbps data rate, and the MAX3189E guarantees a 1mbps data rate with worst-case loads of 3k ? in parallel with 1000pf. the max3188e/MAX3189E invert the tout signal relative to tin (standard rs-232). the transmitter input does not have a pull-up resistor and should be connected to gnd if unused. shutdown the max3188e/MAX3189E feature a shutdown input. drive shdn low to reduce the supply current to 1? (max). shutdown also forces tout into a high-imped- ance state, allowing the signal line to be safely con- trolled by other transmitters. drive shdn high for normal operation. esd protection as with all maxim devices, esd protection structures are incorporated on all pins to protect against esd encoun- tered during handling and assembly. the max3188e/ MAX3189Es?transmitter output has extra protection against static electricity. maxim has developed state-of- the-art structures enabling this pin to withstand esd up max3188e/MAX3189E 15kv esd-protected, 1mbps, 1a rs-232 transmitters in sot23-6 4 _______________________________________________________________________________________ pin description 50% 50% 50% 50% t plh t phl +5v -5v tout tin v ih v il figure 1. transmitter propagation-delay timing shdn tout 0 -5v +5v 0 +2v 1 s/div max3188e transmitter output shutdown waveform max3188e/9e toc07 c l = 150pf shdn tout 0 -5v +5v 0 +2v 1 s/div MAX3189E transmitter output shutdown waveform max3188e/9e toc08 c l = 150pf typical operating characteristics (continued) (v cc = +5.4v, v ee = -5.4v, r l = 3k ? , t a = +25?, unless otherwise noted.) name function 1 shdn active-low shutdown. pull low to reduce the supply current and to force tout into a high-impedance state. 2 gnd ground pin 3 tin ttl/cmos transmitter input 4 tout rs-232 transmitter output 6 v cc positive supply voltage 5 v ee negative supply voltage
to ?5kv without damage or latch-up. the max3188e/ MAX3189E? transmitter output is characterized for pro- tection to the following limits: ?5kv using the human body model ?kv using the contact discharge method specified in iec 1000-4-2 ?5kv using the air-gap discharge method specified in iec 1000-4-2 human body model figure 2 shows the human body model, and figure 3 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, and then discharged into the test device through a 1.5k ? resistor. iec 1000-4-2 the iec 1000-4-2 standard covers esd testing and performance of finished equipment; it does not specifi- cally refer to ics. the max3188e/MAX3189E enable the design of equipment that meets the highest level (level 4) of iec 1000-4-2 without the need for additional esd-protection components. the major 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 model, the esd withstand voltage measured to this standard is generally lower than that measured using the human body. figure 4 shows the iec 1000-4-2 model, and figure 5 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 charged probe. the contact discharge method connects the probe to the device before the probe is energized. power-supply decoupling in most circumstances, 0.1? bypass capacitors are adequate for power-supply decoupling. connect the bypass capacitors as close to the ic as possible. max3188e/MAX3189E 15kv esd-protected, 1mbps, 1a rs-232 transmitters in sot23-6 _______________________________________________________________________________________ 5 charge-current limit resistor discharge resistance storage capacitor c s 100pf r c 1m ? r d 1500 ? high- voltage dc source device under test figure 2. human body esd test model i p 100% 90% 36.8% t ri time t dl current waveform peak-to-peak ringing (not drawn to scale) i r 10% 0 0 amperes figure 3. human body model current waveform 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 4. iec 1000-4-2 esd test model
max3188e/MAX3189E applications information power-supply sources the max3188e/MAX3189E require ?.5v to ?v dual supplies. for applications where these supply voltages are not present, a dc-dc converter must be added. due to the max3188e/MAX3189Es?low current con- sumption, a charge pump can provide the proper supply voltages and requires a minimal amount of board space and cost. when using another rs-232 device containing an internal regulated charge pump (table 1), the max3188e/ MAX3189E may be powered from the internal charge pump (figure 6). this eliminates the need for additional external dc-dc converters to generate the required ?.5v to ?v dual supplies. 15kv esd-protected, 1mbps, 1a rs-232 transmitters in sot23-6 6 _______________________________________________________________________________________ v cc tin gnd gnd v cc tout max3188e MAX3189E (table 1) c bypass 0.1 f c1 0.1 f c4 0.1 f c2 0.1 f c3 0.1 f shdn v ee +3v supply c1+ c1- v+ v- c2+ c2- figure 6. powering the max3188e/MAX3189E t r = 0.7ns to 1ns 30ns 60ns t 100% 90% 10% i peak i figure 5. iec 1000-4-2 esd generator current waveform
max3188e/MAX3189E 15kv esd-protected, 1mbps, 1a rs-232 transmitters in sot23-6 _______________________________________________________________________________________ 7 part no. of tx/rx autoshutdown data rate (bps) max3224 2/2 250k max3223e 2/2 250k max3223 2/2 120k max3222e 2/2 250k max3224e 2/2 250k max3225 2/2 1m max3225e 2/2 1m max3226 1/1 250k max3221e max3221 1/1 120k 1/1 250k max3222 2/2 120k max3226e 1/1 250k max3227 1/1 1m max3227e 1/1 1m max3232 2/2 120k max3232e 2/2 250k max3237 5/3 1m max3238 5/3 250k max3241 3/5 120k max3241e 3/5 250k max3243 3/5 120k max3243e 3/5 250k max3244 3/5 250k max3244e 3/5 250k ?5kv esd protection max3245 3/5 1m autoshutdown plus max3245e 3/5 1m table 1. rs-232 devices with internal regulated charge pumps autoshutdown and autoshutdown plus are trademarks of maxim integrated products. chip information transistor count: 111
max3188e/MAX3189E 15kv esd-protected, 1mbps, 1a rs-232 transmitters in sot23-6 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. 8 _____________________maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 2000 maxim integrated products printed usa is a registered trademark of maxim integrated products. package information 6lsot.eps
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