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february 2008 rev 14 1/19 19 st232b ST232C 5 v powered multi-channel rs-232 drivers and receivers features supply voltage range: 4.5 to 5.5 v supply current no load (typ.): 5 ma transmitter output voltage swing (typ): 7.8 v controlled output slew rate receiver input voltage range: 30 v data rate (typ.): 220 kbps operating temperature range: ? -40 to 85 c ? 0 to 70 c compatible with max232 and max202 description the st232 is a 2 driver, 2 receiver device following eia/tia-232 and v.28 communication standard. it is particularly suitable for applications where 12 v is not available. the st232 uses a single 5 v power supply and only four external capacitors (0.1 f). typical applications are in: portable computers, low power modems, interfaces translation, battery powered rs-232 system, multi-drop rs-232 networks. sop large dip tssop sop table 1. device summary order code temperature range package packaging ST232Cn 0 to 70 c dip-16 25 parts per tube / 40 tube per box ST232Cdr 0 to 70 c so-16 (tape and reel) 2500 parts per reel st232bdr -40 to 85 c so-16 (tape and reel) 2500 parts per reel ST232Cwr 0 to 70 c so-16 large (tape and reel) 1000 parts per reel st232bwr -40 to 85 c so-16 large (tape and reel) 1000 parts per reel ST232Ctr 0 to 70 c tssop16 (tape and reel) 2500 parts per reel st232btr -40 to 85 c tssop16 (tape and reel) 2500 parts per reel www.st.com
st232b - ST232C 2/19 contents 1 pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 6 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
st232b - ST232C pin configuration 3/19 1 pin configuration figure 1. pin connections (top view) table 2. pin description pin n symbol note 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
maximum ratings st232b - ST232C 4/19 2 maximum ratings note: 1 absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. 2 no external supply can be applied to v+ terminal and v- terminal. table 3. absolute maximum ratings symbol parameter value unit v cc supply voltage -0.3 to 6 v t in transmitter input voltage range -0.3 to (v cc + 0.3) v r in receiver input voltage range 30 v t out transmitter output voltage range (v + + 0.3) to (v - - 0.3) v r out receiver output voltage range -0.3 to (v cc + 0.3) v t sctout short circuit duration on t out infinite t stg storage temperature range -65 to + 150
st232b - ST232C electrical characteristics 5/19 3 electrical characteristics table 4. electrical characteristics (c 1 - c 4 = 0.1 f, v cc = 5 v 10 %, t a = -40 to 85 c, unless otherwise specified. typical values are referred to t a = 25 c). symbol parameter test cond ition min. typ. max. unit i supply v cc power supply current no load, t a = 25c 5 10 ma table 5. transmitter electrical characteristics (c 1 - c 4 = 0.1 f, v cc = 5 v 10 %, t a = -40 to 85 c, unless otherwise specified. typical values are referred to t a = 25 c). symbol parameter test condition min. typ. max. unit v tout output voltage swing all transmitter outputs are loaded with 3k to gnd 5 7.8 v i til input leakage current 40 a v til input logic threshold low 0.8 v v tih input logic threshold high 2 v sr t transition slew rate t a = 25c, v cc = 5v r l = 3 to 7k , c l = 50 to 2500pf (1) 730v/s d r data rate (2) 120 220 kbits/s r tout transmitter output resistance v cc = v+ = v- = 0v v out = 2v 300 i sc transmitter output short circuit current one t xout to gnd 10 60 ma 1. measured from 3 v to -3 v or from -3 v to 3 v 2. one transmitter output is loaded with r l = 3 k to 7 k , c l = 50 to 1000 pf
electrical characteristics st232b - ST232C 6/19 table 6. receiver electrical characteristics (c 1 - c 4 = 0.1 f, v cc = 5 v 10 %, t a = -40 to 85 c, unless otherwise specified. typical values are referred to t a = 25 c). symbol parameter test condition min. typ. max. unit v rin receiver input voltage operating range -30 30 v r rin rs-232 input resistance t a = 25c, v cc = 5 v, v rin = 5v 357k v ril rs-232 input threshold low t a = 25c, v cc = 5 v 0.8 1.2 v v rih rs-232 input threshold high t a = 25c, v cc = 5 v 1.7 2.4 v v rihys rs-232 input hysteresis v cc = 5v 0.2 0.5 1 v v rol ttl/cmos output voltage low i out = 3.2ma (to v cc )0.4v v roh ttl/cmos output voltage high i out = -1ma (to gnd) 3.5 v cc -0.4 v i scr receiver output short circuit current 10 ma t dr receiver propagation delay c l = 150pf (1) 0.3 1 s 1. rs-232 in to ttl-cmos out (from 50% to 50%)
st232b - ST232C typical application 7/19 4 typical application figure 2. application circuit (1) (2) 1. c 1-4 capacitors can even be 1f ones 2. c 1-4 can be common or biased capacitors table 7. capacitance value (f) c1 c2 c3 c4 c5 0.1 0.1 0.1 0.1 0.1
typical performance characteristics st232b - ST232C 8/19 5 typical performance characteristics (unless otherwise specified t j = 25 c) figure 3. supply current vs temperature figure 4. data rate vs temperature figure 5. receiver propagation delay figure 6. driver propagation delay figure 7. high level output voltage swing vs temperature figure 8. low level output voltage swing vs temperature
st232b - ST232C typical performance characteristics 9/19 figure 9. high level transmitter output short circuit current vs temperature figure 10. low level transmitter output short circuit current vs temperature figure 11. high level receiver output short circuit current vs temperature figure 12. low level receiver output short circuit current vs temperature
package mechanical data st232b - ST232C 10/19 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. th e 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.
st232b - ST232C package mechanical data 11/19 dim. mm. inch. min. typ. max. min. typ. max. a 1 0.51 0.020 b 0.77 1.65 0.0 3 0 0.065 b 0.5 0.020 b 1 0.25 0.010 d200.7 8 7 e 8 .5 0. 33 5 e 2.54 0.100 e 3 17.7 8 0.700 f 7.1 0.2 8 0 i 5.1 0.201 l 3 . 3 0.1 3 0 z 1.27 0.050 pla s tic dip-16 (0.25) mechanical data p001c
package mechanical data st232b - ST232C 12/19 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
st232b - ST232C package mechanical data 13/19 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 st232b - ST232C 14/19 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
st232b - ST232C 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 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
package mechanical data st232b - ST232C 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 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
st232b - ST232C 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 st232b - ST232C 18/19 7 revision history table 8. document revision history date revision changes 02-sep-2005 11 mistake i til max. on table 5. 27-oct-2006 12 order codes updated. 14-nov-2007 13 added ta b l e 1 . 08-feb-2008 14 modified: table 1 on page 1 .
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