1/10 october 2002 n esd protectio for rs-232 i/o pins 15kv human body model 8kv iec 1000-4-2 contact discharge n 300 m a supply current n 250kbps minimum guarenteed data rate n 6v/ m s minimum guaranteed slew rate n meet eia/tia-232 specifications down to 3v n available in so-18, ssop20 and tssop20 description the st3222e is a 3v powered eia/tia-232 and v.28/v.24 communications interface with low power requirements, high data-rate capabilities and enhanced electrostatic discharge (esd) protection to 8kv using iec1000-4-2 contact discharge and 15kv using the human body model. st3222e has a proprietary low dropout transmitter output stage providing true rs-232 performance from 3 to 5v supplies with a dual charge pump. the charge pump requires only four small 0.1mf external capacitors for operation form 3v supply. the device has two receivers and two drivers. the st3222e features a 1 m a shutdown mode that reduces power consumption and extends battery life in portable systems. its receivers can remain active in shutdown mode, allowing external devices such as modems to be monitored using only 1 m a supply current. the device is guaranteed to run at data rates of 250kbps while maintaining rs-232 output levels. typical applications are notebook, subnotebook and palmtop computers, battery powered equipment, hand-held equipment, peripherals and printers. ordering codes ty pe temperature range package comments st3222ecd 0 to 70 c so-18 (tube) 50parts per tube / 20tube per box st3222ebd -40 to 85 c so-18 (tube) 50parts per tube / 20tube per box st3222ecdr 0 to 70 c so-18 (tape & reel) 1000 parts per reel st3222ebdr -40 to 85 c so-18 (tape & reel) 1000 parts per reel st3222ecpr 0 to 70 c ssop20 (tape & reel) 1350 parts per reel st3222ebpr -40 to 85 c ssop20 (tape & reel) 1350 parts per reel st3222ectr 0 to 70 c tssop20 (tape & reel) 2500 parts per reel ST3222EBTR -40 to 85 c tssop20 (tape & reel) 2500 parts per reel st3222e 15kv esd-protected, 3 to 5.5v, low power, up to 250kbps, rs-232 drivers and receivers sop ssop tssop
st3222e 2/10 pin configuration pin description pln n (so-18) pln n (ssop20 tssp20) symbol name and function 11en receiver enable control. drive low for normal operation. drive high to force the receivers outputs (r_out) into a high-impedance state. 22 c 1 + positive terminal for the first charge pump capacitor 3 3 v+ 5.5v generated by the charge pump. 44 c 1 - negative terminal for the first charge pump capacitor 55 c 2 + positive terminal for the second charge pump capacitor 66 c 2 - negative terminal for the second charge pump capacitor 7 7 v- -5.5v generated by the charge pump. 88 t2 out second transmitter output voltage 99 r2 in second receiver input voltage 10 10 r2 out second receiver output voltage 11 nc not connected 11 12 t2 in second transmitter input voltage 12 13 t1 in first transmitter input voltage 14 nc not connected 13 15 r1 out first receiver output voltage 14 16 r1 in first receiver input voltage 15 17 t1 out first transmitter output voltage 16 18 gnd ground 17 19 v cc supply voltage 18 20 shdn active low shutdown control input. drive low to shut-down transmittes and charge pump so-18 ssop20/tssop20
st3222e 3/10 absolute maximum ratings absolute maximum ratings are those values beyond which damage to the device may occur. functional operation under these condition is not implied. v+ and v- can have a maximum magnitude of +7v, but their absolute addition can not exceed 13 v. shutdown and enable control truth table esd performance: transmitter outputs, receiver inputs electrical characteristics (c 1 -c 4 =0.1 m f, v cc =3vto5.5v,t a = -40 to 85c, unless otherwise specified. typical values are referred to t a =25c) logic input electrical characteristics (c 1 -c 4 =0.1 m f, v cc =3vto5.5v,t a = -40 to 85c, unless otherwise specified. typical values are referred to t a =25c) note 1: transmitter input hysteresis is typically 250mv symbol parameter value unit v cc supply voltage -0.3 to 6 v v+ doubled voltage terminal (v cc -0.3)to7 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 shdn 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 shdn en t-out r-out r-outb 0 0 high z active active 0 1 high z high z active 1 0 active active active 1 1 active high z active 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 symbol parameter test conditions min. typ. max. unit i supply v cc power supply current no load shdn =v cc t a = 25c 0.3 1 ma i shdn shutdown supply current no load shdn =v cc t a = 25c 1 10 m a symbol parameter test conditions min. typ. max. unit v il input logic threshold low t-in, en , shdn (note 1) 0.8 v v ih input logic threshold high v cc = 3.3v 2 v v cc =5v 2.4 v hys transmitter input histeresys 0.25 v i il input leakage current t-in, en , shdn 0.01 1 m a
st3222e 4/10 transmitter electrical characteristics (c 1 -c 4 =0.1 m fv cc =3vto5.5v,t a = -40 to 85c, unless otherwise specified. typical values are referred to t a =25c) receiver electrical characteristics (c 1 -c 4 =0.1 m fv cc =3vto5.5v,t a = -40 to 85c, unless otherwise specified. typical values are referred to t a =25c) timing characteristics (c 1 -c 4 =0.1 m f, v cc =3vto5.5v,t a = -40 to 85c, unless otherwise specified. typical values are referred to t a =25c) (note 1) transmitter skew is measured at the transmitter zero cross points symbol parameter test conditions min. typ. max. unit v tout output voltage swing all transmitter outputs are loaded with 3k w to gnd 5 5.4 v r tout transmitter output resistance v cc =v+=v-=0v v out = 2v 300 10m w i tsc output short circuit current 60 ma i tol output leakage current v cc = 0v or 3v to 3.6v v out = 12v transmitters disable 25 m a symbol parameter test conditions min. typ. max. unit i ol output leakage current r-out, en =v cc , receiver disabled 0.05 10 m a v rin receiver input voltage operating range -25 25 v v ril input threshold low t a = 25c v cc = 3.3v 0.6 1.2 v t a = 25c v cc = 5v 0.8 1.5 v rih input threshold high t a = 25c v cc = 3.3v 1.5 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 w v rol output voltage low i out = 1.6ma 0.4 v v roh output voltage high i out = -1ma v cc -0.6 v cc -0.1 v symbol parameter test conditions min. typ. max. unit d r data transfer rate r l =3k w c l2 = 1000pf one trasmitter switching 250 kbps t phlr t plhr propagation delay input to output r xin to r xout c l = 150pf 0.15 m s |t phlt -t thl | transmitter propagation delay difference (note 1) 200 ns t oer receiver output enable time normal operation 50 ns t odr receiver output disable time normal operation 50 ns |t phlr -t thr | receiver propagation delay difference 50 ns s rt trnasition slew rate t a = 25c r l =3k w to 7k w 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/ m s v/ m s
st3222e 5/10 application circuits capacitance value ( m 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
st3222e 6/10 typical performance characteristics (unless otherwise specified t j = 25c) figure 1 : output current vs output high voltage figure 2 : output current vs output high voltage figure 3 : output current vs output low voltage figure 4 : output current vs output low voltage figure 5 : voltage transfer characteristics for trasmitter inputs figure 6 : receiver input resistance
st3222e 7/10 dim. mm. inch min. typ max. min. typ. max. a 2.35 2.65 0.092 0.104 a1 0.1 0.3 0.004 0.012 a2 2.55 0.100 b 0.33 0.51 0.013 0.020 c 0.23 0.32 0.009 0.012 d 11.35 11.75 0.447 0.462 e 7.4 7.6 0.291 0.299 e 1.27 0.050 h 10.00 10.65 0.393 0.419 h 0.25 0.75 0.010 0.029 k8 ? (max.) l 0.4 1.27 0.016 0.050 so-18 mechanical data 0070768 be a2 a 19 10 18 d l h a1 c e k h x 45? so18 seating plane 0.10mm .004
st3222e 8/10 dim. mm. inch min. typ max. min. typ. max. a 2 0.079 a1 0.05 0.002 a2 1.65 1.75 1.85 0.065 0.069 0.073 b 0.22 0.38 0.009 0.015 c 0.09 0.25 0.004 0.010 d 6.9 7.2 7.5 0.272 0.283 0.295 e 7.4 7.8 8.2 0.291 0.307 0.323 e1 5 5.3 5.6 0.197 0.209 0.220 e 0.65 bsc 0.0256 bsc k0?4?8?0?4?8? l 0.55 0.75 0.95 0.022 0.030 0.037 ssop20 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 0061436c
st3222e 9/10 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 0.031 0.039 0.041 b 0.19 0.30 0.007 0.012 c 0.09 0.20 0.004 0.0079 d 6.4 6.5 6.6 0.252 0.256 0.260 e 6.2 6.4 6.6 0.244 0.252 0.260 e1 4.3 4.4 4.48 0.169 0.173 0.176 e 0.65 bsc 0.0256 bsc k0? 8?0? 8? l 0.45 0.60 0.75 0.018 0.024 0.030 tssop20 mechanical data c e b a2 a e1 d 1 pin 1 identification a1 l k e 0087225c
st3222e 10/10 information furnished is believed to be accurate and reliable. however, stmicroelectronics assumes no res ponsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result f rom its use. no license is granted by implication or otherwise under any patent or patent rights of stmicroelectronics. specificati ons mentioned in this publication are subject to change without notice. this publication supersedes and replaces all information previously supplied. stmicroelectronics products are not authorized for use as critical components in life support devi ces or systems without express written approval of stmicroelectronics. ? the st logo is a registered trademark of stmicroelectronics ? 2002 stmicroelectronics - printed in italy - all rights reserved stmicroelectronics group of companies australia - brazil - canada - china - finland - france - germany - hong kong - india - israel - italy - japan - malaysia - malt a - morocco singapore - spain - sweden - switzerland - united kingdom - united states. ? http://www.st.com
|
