unisonic technologies co., ltd ut3222 preliminary cmos ic www.unisonic.com.tw 1 of 7 copyright ? 2013 unisonic technologies co., ltd qw-r502-986.a 3v to 5.5v multichannel rs-232 line transceivers with 15kv esd protection ? description the utc ut3222 have two receivers and two transmitters, and a dual charge-pump circuit with 15kv esd protection pin to pin (serial-port connection pins, incl uding gnd). the device meets the requirements of tia/eia-232-f and provides the electrical interface between an asynchronous communication controller and the serial-port connector. the charge pump and four small external capacitors allow operation from a single 3v to 5.5v supply. the device operates at data signaling rates up to 250 kbit/s and a maximum of 30v/ s driver output slew rate. the utc ut3222 can be placed in the power-down mode by setting pwrdown low, which draws only 1 a from the power supply. when the device is powered down, the receivers remain active while the drivers are placed in the high-impedance state. also, during power down, the onboard charge pump is disabled; v+ is lowered to v cc and v ? is raised toward gnd. receiver outputs also can be placed in the high-impedance state by setting en high. ? features tssop-20 * rs-232 bus-pin esd protection exceeds15 kv using human-body model (hbm) * meets or exceeds the requir ements of tia/eia-232-f and itu v.28 standards * operates with 3v to 5.5v v cc supply * operates up to 250 kbit/s * two drivers and two receivers * low standby current 1 a typical * external capacitors 40.1 f * accepts 5v logic input with 3.3v supply ? ordering information ordering number package packing lead free halogen free ut3222l-p20-t ut3222g-p20-t tssop-20 tube ut3222l-p20-r UT3222G-P20-R tssop-20 tape reel
ut3222 preliminary cmos ic unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r502-986.a ? pin configuration 9 8 7 6 5 4 3 2 1 18 17 16 14 15 13 12 11 10 19 20 en c1+ v+ c1- c2+ c2- v- dout2 rin2 rout2 nc v cc dout1 rout1 nc din1 din2 rin1 gnd pwrdown ? pin description pin no. pin name description 1 en receiver enable. active low. 2 c1+ positive terminal of voltage-doubler charge-pump capacitor 3 v+ +5.5v generated by the charge pump 4 c1- negative terminal of volta ge-doubler charge-pump capacitor 5 c2+ positive terminal of inverting charge-pump capacitor 6 c2- negative terminal of inverting charge-pump capacitor 7 v- -5.5v generated by the charge pump 8 dout2 rs-232 transmitter outputs 9 rin2 rs-232 receiver inputs 10 rout2 ttl/cmos receiver outputs 11, 14 nc 12 din2 ttl/cmos transmitter inputs 13 din1 ttl/cmos transmitter inputs 15 rout1 ttl/cmos receiver outputs 16 rin1 rs-232 receiver inputs 17 dout1 rs-232 transmitter outputs 18 gnd ground 19 v cc +3.0v to +5.5v supply voltage 20 pwrdown shutdown control. active low. ? function table for each driver inputs (din) inputs( pwrdown ) output dout x l z l h h h h l for each receiver inputs(rin) inputs ( en ) output rout l l h h l l x h z open l h h=high level, l=low level, x=irrelevant, z=high impedance (off), open=input disconn ected or connected driver off.
ut3222 preliminary cmos ic unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r502-986.a ? block diagram
ut3222 preliminary cmos ic unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r502-986.a ? absolute maximum rating over operating free-air temperature range (unless otherwise noted) parameter symbol ratings unit supply voltage range v cc -0.3 ~ 6 v positive output supply voltage range (note 2) v + -0.3 ~ 7 v negative output supply voltage range (note 2) v - 0.3 ~ -7 v supply voltage difference (note 2) v + - v - 13 v input voltage drivers, en , pwrdown v in -0.3 ~ 6 v receivers -25 ~ 25 v output voltage drivers v out -13.2 ~ 13.2 v receivers -0.3 ~ v cc +0.3 v operating virtual j unction temperature t j 150 c storage temperature t stg -65 ~ + 150 c notes: 1. absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device oper ation is not implied. 2. all voltages are with respect to network gnd. ? thermal data parameter symbol rating unit junction to ambient ja 83 c/w ? recommended operating conditions (see note & figure 1) parameter symbol test conditions min typ max unit supply voltage v cc v cc =3.3v 3 3.3 3.6 v v cc =5v 4.5 5 5.5 v driver and control high-level input voltage v ih din, en , pwrdown v cc =3.3v 2 v v cc =5.5v 2.4 driver and control low-level input voltage v il din, en , pwrdown 0.8 v driver and control input voltage v in din, en , pwrdown 0 5.5 v receiver input voltage v in -25 25 v operating free-air temperature t a 0 70 c note:. test conditions are c1 ? c4=0.1 f at v cc =3.3v 0.3v; c1=0.047 f, c2 ? c4=0.33 f at v cc =5 v0.5v.
ut3222 preliminary cmos ic unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r502-986.a ? electrical characteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see note 3 & figure 1) parameter symbol test conditions min typ (note 1) max unit input leakage current i i ( en , pwrdown ) 0.01 1 a supply current i cc no load, pwrdown at v cc 0.3 1 ma supply current (powered off) no load, pwrdown at gnd 1 10 a driver section high-level output voltage v oh dout at r l =3k ? to gnd, din=gnd 5 5.4 v low-level output voltage v ol dout at r l =3k ? to gnd, din=v cc -5 -5.4 v high-level input current i oh v i =v cc 0.01 1 a low-level input current i ol v i at gnd 0.01 1 a short-circuit output current (note 2) i os v cc =3.6v, v out =0v 35 60 ma v cc =5.5v, v out =0v 35 60 ma output resistance r o v cc , v+ and v- =0v, v out =2v 300 10m ? output leakage current i off pwrdown =gnd, v cc =3v~3.6v, v out =12v 25 a pwrdown =gnd, v cc =4.5~5.5v, v out =10v 25 a receiver section high-level output voltage v oh i oh =-1ma v cc -0.6v v cc - 0.1v v low-level output voltage v ol i ol =1.6ma 0.4 v positive-going input threshold voltage v it+ v cc =3.3v 1.5 2.4 v v cc =5 1.8 2.4 v negative-going input threshold voltage v it- v cc =3.3v 0.6 1.2 v v cc =5 0.8 1.5 v input hysteresis (v it+ ~v it- ) v hys 0.3 v output leakage current i off en=v cc 0.05 10 a input resistance r i v i =3v~25v 3 5 7 k ? notes: 1. all typical values are at v cc =3.3v or v cc =5v, and t a =25c 2. short-circuit durations should be controlled to prevent exceeding the device absolute power-dissipation ratings, and not more than one output should be shorted at a time. 3. test conditions are c1 ? c4=0.1 f at v cc =3.3v 0.3v; c1=0.047 f, c2 ? c4=0.33 f at v cc =5 v0.5v. 4. pulse skew is defined as |t plh ? t phl | of each channel of the same device.
ut3222 preliminary cmos ic unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r502-986.a ? switching cha racteristics over recommended ranges of supply voltage and operating free-air temperature (unless otherwise noted) (see note 3 and figure 1) parameter symbol test conditions min typ (note 1) max unit driver section maximum data rate c l =1000pf, r l =3k ? , one dout switching 150 250 kbit/s pulse skew (note 4) t sk (p) c l =150~2500pf, r l =3~7k ? 300 ns slew rate, transition region sr(tr) r l =3~7k ? , v cc =3.3v c l =150~1000pf 6 30 v/ s c l =150~2500pf 4 30 receiver section propagation delay time, low- to high-level output t plh c l =150pf 300 ns propagation delay time, high- to low-level output t phl c l =150pf 300 ns output enable time t en c l =150pf, r l =3k ? 200 ns output disable time t dis c l =150pf, r l =3k ? 200 ns pulse skew (note 4) t sk ( p ) 300 ns notes: 1. all typical values are at v cc =3.3v or v cc =5v, and t a =25c 2. short-circuit durations should be controlled to prevent exceeding the device absolute power-dissipation ratings, and not more than one output should be shorted at a time. 3. test conditions are c1 ? c4=0.1 f at v cc =3.3v 0.3v; c1=0.047 f, c2 ? c4=0.33 f at v cc =5 v0.5v. 4 pulse skew is defined as |t plh ? t phl | of each channel of the same device.
ut3222 preliminary cmos ic unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r502-986.a ? typical application circuit v cc vs. capacitor values v cc c1 c2, c3 and c4 3.3v0.3v 0.1 f 0.1 f 5v0.5v 0.047 f 0.33 f 3v~5.5v 0.1 f 0.47 f figure 1. typical operating circuit and capacitor values utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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