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february 2008 rev 5 1/19 19 st3232eb st3232ec 15 kv esd protection 3 to 5.5 v low power, up to 250 kbps, rs-232 drivers and receivers features esd protection for rs-232 i/o pins 15 kv human body model 8 kv iec 1000-4-2 contact discharge 300 a supply current 250 kbps minimum guaranteed data rate 6v/s minimum guaranteed slew rate meet eia/tia-232 specifications down to 3 v available in so-16, so-16 large ssop16 and tssop16 description the st3232e is a 3 v powered eia/tia-232 and v.28/v.24 communication interfaces with low power requirements, high data-rate capabilities and enhanced electrostatic discharge (esd) protection to 8 kv using iec1000-4-2 contact discharge and 15 kv using the human body model. st3232e has a proprietary low dropout transmitter output stage providing true rs-232 performance from 3 to 5 v supplies with a dual charge pump. the charge pump requires only four small 0.1 f standard external capacitors for operations from 3 v supply. the st3232e has two receivers and two drivers. the device is guaranteed to run at data rates of 250 kbps while maintaining rs-232 output levels. typical applications are notebook, subnotebook and palmtop computers, battery powered equipment, hand-held equipment, peripherals and printers. so-16 large ssop16 tssop16 so-16 table 1. device summary order codes temp. range packages packaging st3232ecdr 0 to 70 c so-16 (tape and reel) 2500 parts per reel st3232ebdr -40 to 85 c so-16 (tape and reel) 2500 parts per reel st3232ecpr 0 to 70 c ssop16 (tape and reel) 1350 parts per reel st3232ebpr -40 to 85 c ssop16 (tape and reel) 1350 parts per reel ST3232ECTR 0 to 70 c tssop16 (tape and reel) 2500 parts per reel st3232ebtr -40 to 85 c tssop16 (tape and reel) 2500 parts per reel www.st.com
contents st3232eb - st3232ec 2/19 contents 1 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
st3232eb - st3232ec pin configuration 3/19 1 pin configuration figure 1. pin connection table 2. pin description pin n symbol name and function 1c 1 + positive terminal for the first charge pump capacitor 2 v+ doubled voltage terminal 3c 1 - negative terminal for the first charge pump capacitor 4c 2 + positive terminal for the second charge pump capacitor 5c 2 - negative terminal for the second charge pump capacitor 6 v- inverted voltage terminal 7t2 out second transmitter output voltage 8r2 in second receiver input voltage 9r2 out second receiver output voltage 10 t2 in second transmitter input voltage 11 t1 in first transmitter input voltage 12 r1 out first receiver output voltage 13 r1 in first receiver input voltage 14 t1 out first transmitter output voltage 15 gnd ground 16 v cc supply voltage
absolute maximum ratings st3232eb - st3232ec 4/19 2 absolute maximum ratings note: absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. externally applied v+ and v- can have a maximum magnitude of +7 v, but their absolute addition can not exceed 13 v. running on internal charge pump, intrinsic se lf limitation allows exceeding those values without any damage. startup voltage sequence (v cc , then v+, then v-) is critical, therefore it is not recommended to use this device using externally applied voltage to v+ and v-. table 3. absolute maximum ratings symbol parameter value unit v cc supply voltage -0.3 to 6 v v+ doubled voltage terminal (v cc - 0.3) to 7 v v- inverted voltage terminal 0.3 to -7 v v+ +|v-| 13 v t in transmitter input voltage range -0.3 to 6 v r in receiver input voltage range 25 v t out transmitter output voltage range 13.2 v r out receiver output voltage range -0.3 to (v cc + 0.3) v t short transmitter output short to gnd time continuous figure 2. esd performance: transmitter outputs, receiver inputs symbol parameter test conditions min. typ. max. unit esd esd protection voltage human body model 15 kv esd esd protection voltage iec-1000-4-2 8kv
st3232eb - st3232ec electrical characteristics 5/19 3 electrical characteristics table 4. electrical characteristics (c 1 - c 4 = 0.1 f, v cc = 3 v to 5.5 v, t a = -40 to 85 c, unless otherwise specified. typical values are referred to t a = 25 c) symbol parameter test cond itions min. typ. max. unit i supply v cc power supply current no load, v cc = 3v or 5v, t a = 25c 0.3 1 ma table 5. logic input (c 1 - c 4 = 0.1 f, v cc = 3 v to 5.5 v, t a = -40 to 85 c, unless otherwise specified. typical values are referred to t a = 25 c) symbol parameter test conditions min. typ. max. unit v til input logic threshold low t-in 0.8 v v hys transmitter input hysteresis 0.25 v v tih input logic threshold high v cc = 3.3v 2 v v cc = 5v 2.4 i il input leakage current t-in 0.01 1a table 6. transmitter (c 1 - c 4 = 0.1 f tested at 3.3 v 10 %, v cc = 3 v to 5.5 v, t a = -40 to 85 c, unless otherwise specified. typica l values are referred to t a = 25 c) symbol parameter test conditions min. typ. max. unit v tout output voltage swing all transmitter outputs are loaded with 3k to gnd 5 5.4 v r tout transmitter output resistance v cc = 0v, v out = 2v 300 10m i sc output short circuit current 60 ma i tol output leakage current v cc = 0v or 3.3v to 5.5v v out = 12v transmitters disable 25 a
electrical characteristics st3232eb - st3232ec 6/19 note: 1 transmitter skew is measured at the transmitter zero cross points table 7. receiver (c 1 - c 4 = 0.1 f tested at 3.3 v 10 %, v cc = 3 v to 5.5 v, t a = -40 to 85 c, unless otherwise specified. typica l values are referred to t a = 25 c) symbol parameter test cond itions min. typ. max. unit v rin receiver input voltage operating range -25 25 v v ril rs-232 input threshold low t a = 25c, v cc = 3.3v 0.6 1.1 v t a = 25c, v cc = 5v 0.8 1.5 v rih rs-232 input threshold high t a = 25c, v cc = 3.3v 1.4 2.4 v t a = 25c, v cc = 5v 1.8 2.4 v rihys input hysteresis 0.5 v r rin input resistance t a = 25c 3 5 7 k v rol ttl/cmos output voltage low i out = 1.6ma 0.4 v v roh ttl/cmos output voltage high i out = -1ma v cc -0.6 v cc -0.1 v table 8. timing characteristics (c 1 - c 4 = 0.1 f tested at 3.3 v 10 %, v cc = 3 v to 5.5 v, t a = -40 to 85 c, unless otherwise specified. typical values are referred to t a = 25 c) symbol parameter test conditions min. typ. max. unit d r data transfer rate r l = 3k , c l2 = 1000pf one transmitter switching 250 kbps t phlr t plhr propagation delay input to output r xin = r xout , c l = 150pf 0.15 s t oer receiver output enable time normal operation 50 ns t odr receiver output disable time normal operation 50 ns |t phlt - t thl | transmitter propagation delay difference ( note 1 ) 200 ns |t phlr - t thr | receiver propagation delay difference 50 ns s rt transition slew rate t a = 25c r l = 3k to 7k v cc = 3.3v measured from +3v to -3v or -3v to +3v c l = 150pf to 1000pf c l = 150pf to 2500pf 6 4 30 30 v/s v/s
st3232eb - st3232ec application 7/19 4 application figure 3. application circuits table 9. capacitance value (f) v cc c1 c2 c3 c4 cbypass 3.0 to 3.6 0.1 0.1 0.1 0.1 0.1 4.5 to 5.5 0.047 0.33 0.33 0.33 0.1 3.0 to 5.5 0.1 0.47 0.47 0.47 0.1
typical performance characteristics st3232eb - st3232ec 8/19 5 typical performance characteristics (unless otherwise specified t j = 25 c) figure 4. output current vs output high voltage figure 5. output current vs output high voltage figure 6. output current vs output low voltage figure 7. output current vs output low voltage figure 8. voltage transfer characteristics for transmitter inputs figure 9. receiver input resistance
st3232eb - st3232ec package mechanical data 9/19 6 package mechanical data in order to meet environmental requirements, st offers these devices in ecopack ? packages. these packages have a lead-free second level interconnect. the category of second level interconnect is marked on the package and on the inner box label, in compliance with jedec standard jesd97. the maximum ratings related to soldering conditions are also marked on the inner box label. ecopack is an st trademark. ecopack specifications are available at: www.st.com.
package mechanical data st3232eb - st3232ec 10/19 dim. mm. inch. min. typ. max. min. typ. max. a 1.75 0.06 8 a 1 0.1 0.25 0.004 0.010 a 2 1.64 0.06 3 b 0. 3 5 0.46 0.01 3 0.01 8 b 1 0.1 9 0.25 0.007 0.010 c 0.5 0.01 9 c1 45 (typ.) d 9 . 8 10 0. 38 50. 393 e5. 8 6.2 0.22 8 0.244 e 1.27 0.050 e 38 . 89 0. 3 50 f 3 . 8 4.0 0.14 9 0.157 g 4.6 5. 3 0.1 8 1 0.20 8 l 0.5 1.27 0.01 9 0.050 m 0.62 0.024 s8 (m a x.) s o-16 mechanical data 0016020d
st3232eb - st3232ec package mechanical data 11/19 dim. mm. inch. min. typ. max. min. typ. max. a 2.65 0.104 a 1 0.1 0.2 0.004 0.00 8 a 2 2.45 0.0 9 6 b 0. 3 50.4 9 0.014 0.01 9 b 1 0.2 3 0. 3 2 0.00 9 0.012 c 0.5 0.020 c1 45 (typ.) d 10.1 10.5 0. 39 7 0.41 3 e 10.0 10.65 0. 393 0.41 9 e 1.27 0.050 e 38 . 89 0. 3 50 f 7.4 7.6 0.2 9 10. 3 00 g l 0.5 1.27 0.020 0.050 m 0.75 0.02 9 s8 (m a x.) s o-16l mechanical data po1 3 i
package mechanical data st3232eb - st3232ec 12/19 dim. mm. inch. min. typ. max. min. typ. max. a 2 0.07 9 a1 0.05 0.21 0.002 0.00 8 a2 1.65 1. 8 5 0.065 0.07 3 b 0.22 0. 38 0.00 9 0.015 c0.0 9 0.25 0.00 3 5 0.00 98 d5. 9 6.5 0.2 3 2 0.256 e7.4 8 .2 0.2 9 10. 3 2 3 e1 5. 3 5 5.6 0.1 9 7 0.20 9 0.220 e 0.65 0.0256 k0 8 0 8 l 0.55 0. 9 5 0.022 0.0 3 7 ss op16 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 72 99 5 89 /a
st3232eb - st3232ec package mechanical data 13/19 dim. mm. inch. min. typ. max. min. typ. max. a 1.2 0.047 a1 0.05 0.15 0.002 0.004 0.006 a2 0. 8 1 1.05 0.0 3 1 0.0 39 0.041 b 0.1 9 0. 3 0 0.007 0.012 c0.0 9 0.20 0.004 0.007 9 d4. 9 5 5.1 0.1 93 0.1 9 7 0.201 e 6.2 6.4 6.6 0.244 0.252 0.260 e1 4. 3 4.4 4.4 8 0.16 9 0.17 3 0.176 e 0.65 b s c 0.0256 b s c k0 8 0 8 l 0.45 0.60 0.75 0.01 8 0.024 0.0 3 0 t ss op16 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 00 8 0 338 d
package mechanical data st3232eb - st3232ec 14/19 dim. mm. inch. min. typ. max. min. typ. max. a 33 0 12. 99 2 c 12. 8 1 3 .2 0.504 0.51 9 d 20.2 0.7 9 5 n60 2. 3 62 t 22.4 0. 88 2 ao 6.45 6.65 0.254 0.262 bo 10. 3 10.5 0.406 0.414 ko 2.1 2. 3 0.0 8 2 0.0 9 0 po 3 . 9 4.1 0.15 3 0.161 p7. 98 .1 0. 3 11 0. 3 1 9 tape & reel s o-16 mechanical data
st3232eb - st3232ec package mechanical data 15/19 dim. mm. inch. min. typ. max. min. typ. max. a 33 0 12. 99 2 c 12. 8 1 3 .2 0.504 0.51 9 d 20.2 0.7 9 5 n60 2. 3 62 t 22.4 0. 88 2 ao 10. 8 11.0 0.425 0.4 33 bo 10.7 10. 9 0.421 0.42 9 ko 2. 93 .1 0.114 0.122 po 3 . 9 4.1 0.15 3 0.161 p 11. 9 12.1 0.46 8 0.476 tape & reel s o-16l mechanical data
package mechanical data st3232eb - st3232ec 16/19 dim. mm. inch. min. typ. max. min. typ. max. a 33 0 12. 99 2 c 12. 8 1 3 .2 0.504 0.51 9 d 20.2 0.7 9 5 n60 2. 3 62 t 22.4 0. 88 2 ao 8 .4 8 .6 0. 33 10. 339 bo 6.7 6. 9 0.264 0.272 ko 2. 93 .1 0.114 0.122 po 3 . 9 4.1 0.15 3 0.161 p 11. 9 12.1 0.46 8 0.476 tape & reel ss op16 mechanical data
st3232eb - st3232ec package mechanical data 17/19 dim. mm. inch. min. typ. max. min. typ. max. a 33 0 12. 99 2 c 12. 8 1 3 .2 0.504 0.51 9 d 20.2 0.7 9 5 n60 2. 3 62 t 22.4 0. 88 2 ao 6.7 6. 9 0.264 0.272 bo 5. 3 5.5 0.20 9 0.217 ko 1.6 1. 8 0.06 3 0.071 po 3 . 9 4.1 0.15 3 0.161 p7. 98 .1 0. 3 11 0. 3 1 9 tape & reel t ss op16 mechanical data
revision history st3232eb - st3232ec 18/19 7 revision history table 10. document revision history date revision changes 06-sep-2006 3 order codes updated. 21-jan-2008 4 added: ta b l e 1 and note on ta b l e 3 . 08-feb-2008 5 modified: table 1 on page 1 .
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