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may 2010 doc id 17045 rev 2 1/25 1 stm6522 dual push-button smart reset ? with capacitor-adjustable setup delay features dual smart reset? push-button inputs with capacitor-adjustable extended reset setup delay (t src ) no power-on reset dual rst output, active-low, open-drain fixed smart reset? input logic voltage levels broad operating voltage range 1.65 v to 5.5 v, inactive reset output levels valid down to 1.0 v low supply current (1.5 a) operating temperature: industrial grade ?40 c to +85 c tdfn8 package: 2 mm x 2 mm x 0.75 mm rohs compliant applications mobile phones, smartphones e-books mp3 players games portable navigation devices any application that requires delayed reset push-button(s) response for improved system stability tdfn8 (dg) 2 mm x 2 mm www.st.com
contents stm6522 2/25 doc id 17045 rev 2 contents 1 description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 pin descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.1 power supply (v cc ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2 ground (v ss ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 primary smart reset? input (sr0 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.4 secondary smart reset? input (sr1 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.5 adjustable delay of smart reset? (src pin) . . . . . . . . . . . . . . . . . . . . . 10 2.6 reset output (rst1 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.7 reset output (rst2 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 3 typical operating characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4 maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 5 dc and ac parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6 package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 7 package footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 8 tape and reel information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 9 part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 10 package marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 11 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
stm6522 list of tables doc id 17045 rev 2 3/25 list of tables table 1. signal names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 table 2. t src programmed by an ideal external capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 table 3. absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 table 4. operating and measurement conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 table 5. dc and ac characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 table 6. tdfn ? 8-lead 2 x 2 x 0.75 mm, 0.5 mm pitch package mechanical data . . . . . . . . . . . . . 17 table 7. parameters for landing pattern - tdfn ? 8-lead 2 x 2 mm package . . . . . . . . . . . . . . . . . 18 table 8. carrier tape dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 table 9. reel dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 table 10. ordering information scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 table 11. package marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 table 12. document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
stm6522 list of figures doc id 17045 rev 2 4/25 list of figures figure 1. logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 figure 2. pin connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 3. block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 figure 4. single-button smart reset? typical hookup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 figure 5. dual-button smart reset? typical hookup. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 figure 6. timing waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 figure 7. stm6522 timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 figure 8. supply current (i cc ) vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 figure 9. smart reset delay (t src ) vs. temperature, c src = 0.6 f. . . . . . . . . . . . . . . . . . . . . . . . . 11 figure 10. reset timeout period (t rec ) vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 11. smart reset? input voltage threshold vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 figure 12. ac testing input/output waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 figure 13. tdfn ? 8-lead 2 x 2 x 0.75 mm, 0.5 mm pitch package outline . . . . . . . . . . . . . . . . . . . . . 17 figure 14. landing pattern - tdfn ? 8-lead 2 x 2 mm without thermal pad . . . . . . . . . . . . . . . . . . . . 18 figure 15. carrier tape . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 figure 16. reel dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 figure 17. tape trailer/leader. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 18. pin 1 orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 figure 19. package marking, top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
stm6522 description doc id 17045 rev 2 5/25 1 description the smart reset? devices provide a useful feature that ensures that inadvertent short reset push-button closures do not cause system resets as the extended smart reset? delay setup periods are implemented. once the valid smart reset? input levels and setup delay are met, the device generates an output reset pulse for a fixed timeout period (t rec ). the typical application hookup shows that either a single smart reset? input, or both reset inputs can be connected to the applications interrupt and control both the interrupt pin and the hard reset functions. if the push-button is closed for a short time, the processor is only interrupted. if the system still does not respond properly, holding the push-button(s) for the extended setup time (t src ) causes a hard reset of the processor. the smart reset? feature helps significantly increase system stab ility and eliminates the need for a dedicated reset button. the stm65xx family of smart reset? devices consists of low-current microprocessor reset circuits targeted at applications such as mp3 players, portable navigation or mobile phones, generally any application that requires delayed reset push-button(s) response for improved system stability. the devices in the stm65xx smart reset? family include various combinations of useful features for the targeted applications. the stm6522 has two combined smart reset? inputs (sr0 and sr1 ) with delayed reset setup time (t src ) programmed by an external capacitor on the src pin. figure 1. logic diagram am04867v2 v cc sr0 rst1 rst2 v ss stm6522 sr1 src
description stm6522 6/25 doc id 17045 rev 2 figure 2. pin connections figure 3. block diagram table 1. signal names symbol input/ output description rst 1 output open-drain reset output, active-low, no internal pull-up resistor. rst 2 output open-drain reset output, active-low, no internal pull-up resistor. sr0 input primary push-button smart reset? input, active-low, fixed voltage input logic levels, no internal pull-up. sr1 input secondary push-button smart reset? input - combines with the primary push- button reset to provide setup delay time, active-low, fixed voltage input logic levels, no internal pull-up. src input smart reset? input delay setup control: connect to an external capacitor to adjust the delay setup time (t src ). v cc supply supply voltage input. power supply for the device. a 0.1 f decoupling ceramic capacitor is recommended to be connected between v cc and v ss pins. v ss supply supply ground. nc no connect (not bonded); should be connected to v ss . am04868v2 src nc 1 2 3 stm6522 4 8 7 6 5 rst2 v ss v cc sr1 sr0 rst1 sr0 rst1 t rec generator rst2 sr1 am04869v2 t src generator src
stm6522 description doc id 17045 rev 2 7/25 figure 4. single-button smart reset? typical hookup figure 5. dual-button smart reset? typical hookup am04870v2 sr0 src sr1 rst1 v ss v cc int/ nmi v ss push-button switch mcu reset stm6522 v cc v cc c src am004871v2 v cc sr0 sr1 src rst1 v ss v cc int/ nmi v ss push-button switch mcu push-button switch reset stm6522 v cc c src
description stm6522 8/25 doc id 17045 rev 2 figure 6. timing waveforms v cc sr0 sr1 rst1, 1.65 v glitch immunity t src 1.65 v t rec am04872v2 rst2
stm6522 pin descriptions doc id 17045 rev 2 9/25 2 pin descriptions 2.1 power supply (v cc ) this pin is used to provide the power to the device. a 0.1 f decoupling ceramic capacitor is recommended to be connected between v cc and v ss pins. 2.2 ground (v ss ) this is the supply ground for the device. 2.3 primary smart reset? input (sr0 ) the primary push-button smart reset? input, active-low pin is connected to the push- button switch. the input logic voltage levels are set to a fixed voltage level and have no internal pull-up resistor. 2.4 secondary smart reset? input (sr1 ) the secondary push-button smart reset? input, active-low pin is connected to the second push-button switch. the input logic voltage levels are set to a fixed voltage level and have no internal pull-up resistor. keeping both smart reset? inputs sr0 and sr1 active for longer than t src activates the reset output pulse. figure 7. stm6522 timing reset is asserted ?low? right after the smart reset? setup delay (t src ) has been met and returns to high after the t rec period. am04873v2 sr0 sr1 t src t rec rst1, rst2
pin descriptions stm6522 10/25 doc id 17045 rev 2 2.5 adjustable delay of smart reset? (src pin) this pin controls the setup time before the push-button action is validated by the reset output. it is connected to an external capacitor (c src ), which is tied to ground to provide the desired value of setup time (t src ). selected calculated t src and c src examples are given in ta b l e 2 . refer also to table 5 . 2.6 reset output (rst 1 ) this output is active-low, open-drain with no internal pull-up resistor. 2.7 reset output (rst2 ) this output is active-low, open-drain with no internal pull-up resistor. table 2. t src programmed by an ideal external capacitor calculated c src value [f] setup delay t src [s] (1)(2) 1. at 25 c. example calculations based on an ideal capacitor. during application design and component selection it should be considered that the current flowing into the external t src programming capacitor (c src ) is on the order of 100 na, therefore a low-leakage capacitor (ceramic or film capacitor) should be used and placed as close as possible to the src pin. also an adequate low-leakage pcb environment should be ensured to prevent t src accuracy from being affected. a recommended minimum value of c src is 0.1 f. 2. in case of quickly repeated activations of t src counter, an interval of 10 ms min. is needed between the activations to fully discharge c src , so that the next t src is as specified. closest common c src value [f] min. typ. max. 0.2 2 2.5 3.0 0.22 0.3 3 3.75 4.5 0.33 0.6 6 7.5 9 0.56 1 10 12.5 15 1
stm6522 typical operating characteristics doc id 17045 rev 2 11/25 3 typical operating characteristics figure 8. supply current (i cc ) vs. temperature figure 9. smart reset delay (t src ) vs. temperature, c src = 0.6 f 0 0.5 1 1.5 2 2.5 3 ?60 ?40 ?20 0 20 40 60 80 100 120 140 temperature [?c] i cc [a] 5.5 v 3.3 v 2 v am07328 ?60 ?40 ?20 am07329 6 6.5 7 7.5 8 8.5 9 0 20 40 60 80 100 120 140 temperature [?c] t src [s] 5.5 v 3.3 v 2 v
typical operating characteristics stm6522 12/25 doc id 17045 rev 2 figure 10. reset timeout period (t rec ) vs. temperature figure 11. smart reset? input voltage threshold vs. temperature ?60 ?40 ?20 am07330 140 160 180 200 220 240 260 280 0 20 40 60 80 100 120 140 temperature [?c] t rec [ms] 5.5 v 3.3 v 2 v ?60 ?40 ?20 am07331 0.3 0.4 0.5 0.6 0.7 0.8 0 20 40 60 80 100 120 140 temperature [?c] v ith(sr) [v] 5.5 v 3.3 v 2 v
stm6522 maximum ratings doc id 17045 rev 2 13/25 4 maximum ratings stressing the device above the ratings listed in table 3: absolute maximum ratings may cause permanent damage to the device. these are stress ratings only and operation of the device at these or any other conditions above those indicated in the operating sections of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. refer also to the stmicroelectronics sure program and other relevant quality documents. table 3. absolute maximum ratings symbol parameter value unit t stg storage temperature (v cc off) ?55 to +150 c t sld (1) 1. reflow at peak temperature of 260 c. the time above 255 c must not exceed 30 seconds. lead solder temperature for 10 seconds 260 c ja thermal resistance (junction to ambient) tdfn8 149.0 c/w v io input or output voltage ?0.3 to v cc +0.3 v v cc supply voltage ?0.3 to 7 v
dc and ac parameters stm6522 14/25 doc id 17045 rev 2 5 dc and ac parameters this section summarizes the operating measurement conditions, and the dc and ac characteristics of the device. the parameters in the dc and ac characteristics tables that follow, are derived from tests performed under the measurement conditions summarized in table 4: operating and measurement conditions . designers should check that the operating conditions in their circuit match the operating conditions when relying on the quoted parameters. figure 12. ac testing input/output waveforms table 4. operating and measurement conditions parameter value unit v cc supply voltage 1.65 to 5.5 v ambient operating temperature (t a ) ?40 to +85 c input rise and fall times 5ns input pulse voltages 0.2 to 0.8 v cc v input and output timing ref. voltages 0.3 to 0.7 v cc v 0.8 v cc 0.2 v cc 0.7 v cc 0.3 v cc am00478
stm6522 dc and ac parameters doc id 17045 rev 2 15/25 table 5. dc and ac characteristics symbol parameter test conditions (1) min. typ. (2) max. unit v cc supply voltage range 1.65 5.5 v i cc supply current v cc = 5.0 v 2 3 a v cc = 3.0 v 1.5 a v ol reset output voltage low (active-low reset asserted) v cc 4.5 v, sinking 3.2 ma 0.3 v v cc 3.3 v, sinking 2.5 ma 0.3 v v cc 1.65 v, sinking 1 ma 0.3 v t rec reset timeout delay, factory programmed 140 210 280 ms smart reset? inputs v il sr0 , sr1 input voltage low v ss ? 0.3 0.3 v v ih sr0 , sr1 input voltage high 0.85 5.5 v i li(sr) input leakage current, srx input ?1 +1 a smart reset? delay t src (3) delayed smart reset? setup time. refer to table 2 . t a = 25 c 10 x c src (f) 12.5 x c src (f) 15 x c src (f) s 1. valid for ambient operating temperature: t a = ?40 to +85 c; v cc = 1.65 to 5.5 v (except where noted). 2. typical value is at 25 c and v cc = 3.3 v unless otherwise noted. 3. input glitch immunity is equal to t src (when both sr inputs are low, otherwise infinite).
package mechanical data stm6522 16/25 doc id 17045 rev 2 6 package mechanical data in order to meet environmental requirements, st offers these devices in different grades of ecopack ? packages, depending on their level of environmental compliance. ecopack ? specifications, grade definitions and product status are available at: www.st.com . ecopack ? is an st trademark.
stm6522 package mechanical data doc id 17045 rev 2 17/25 figure 13. tdfn ? 8-lead 2 x 2 x 0.75 mm, 0.5 mm pitch package outline table 6. tdfn ? 8-lead 2 x 2 x 0.75 mm, 0.5 mm pitch package mechanical data symbol dimension (mm) dimension (inches) min. nom. max. min. nom. max. a 0.70 0.75 0.80 0.028 0.030 0.031 a1 0.00 0.02 0.05 0.000 0.001 0.002 b 0.15 0.20 0.25 0.006 0.008 0.010 d bsc 1.9 2.00 2.1 0.075 0.079 0.083 e bsc 1.9 2.00 2.1 0.075 0.079 0.083 e 0.50 0.020 l 0.45 0.55 0.65 0.018 0.022 0.026 e l bottom view 8 5 pin#1 id 1 pin 1 index area 4 b e 0.10 c a a1 plane seat ing top view 2x 2x d pin 1 index area 0.10 c 0.10 c 0.08 c 0.10 c a b b a c 8070540_a side view
package footprint stm6522 18/25 doc id 17045 rev 2 7 package footprint figure 14. landing pattern - tdfn ? 8-lead 2 x 2 mm without thermal pad table 7. parameters for landing pattern - tdfn ? 8-lead 2 x 2 mm package parameter description dimension (mm) min. nom. max. l contact length 1.05 ? 1.15 b contact width 0.25 ? 0.30 e max. land pattern y-direction ? 2.85 ? e1 contact gap spacing ? 0.65 ? d max. land pattern x-direction ? 1.75 ? p contact pitch ? 0.5 ? am00441 d p e1 e l b
stm6522 tape and reel information doc id 17045 rev 2 19/25 8 tape and reel information figure 15. carrier tape t k 0 p 1 a 0 b 0 p 2 p 0 center lines of cavity w e f d top cover tape user direction of feed am03073v2 table 8. carrier tape dimensions package w d e p 0 p 2 fa 0 b 0 k 0 p 1 tunit bulk qty. tdfn8 8.00 +0.30 ?0.10 1.50 +0.10/ ?0.00 1.75 0.10 4.00 0.10 2.00 0.10 3.50 0.05 2.30 0.05 2.30 0.05 1.00 0.05 4.00 0.10 0.250 0.05 mm 3000
tape and reel information stm6522 20/25 doc id 17045 rev 2 figure 16. reel dimensions table 9. reel dimensions tape sizes a max. b min. c d min. n min. g t max. 8 mm 180 (7 inches) 1.50 13.0 +/? 0.20 20.20 60 8.4 +2/?0 14.40 a d b c n t am00443 40 mm min. acces hole at slot location tape slot in core for tape start 25 mm min width full radius g measured at hub
stm6522 tape and reel information doc id 17045 rev 2 21/25 figure 17. tape trailer/leader figure 18. pin 1 orientation note: 1 drawings are not to scale. 2 all dimensions are in mm, unless otherwise noted. leade r trailer 10 0 mm min. start 160 mm min. 400 mm min. end am00444 to p cover tape user direction of feed sealed with cover tape no components no components components am00442 user direction of feed
part numbering stm6522 22/25 doc id 17045 rev 2 9 part numbering for device options currently available refer to ta ble 1 1 . for other options, or for more information on any aspect of this device, please contact the st sales office nearest you. table 10. ordering information scheme example: stm6522 a a a a dg 6 f device type stm6522 v cc monitoring, power-on reset a = no v cc monitoring, no power-on reset smart reset? setup delay (t src ); presence of internal input pull-up on all smart reset? inputs (srx ) a = user-programmed (external capacitor); no input pull-up output type a = both rst1 and rst2 open-drain, no pull-up, active-low reset timeout period (t rec ) a = 140 ms min. package dg = tdfn8 2 x 2 x 0.75 mm, 0.5 mm pitch temperature range 6 = ?40 c to +85 c shipping method f = ecopack ? package, tape and reel
stm6522 package marking doc id 17045 rev 2 23/25 10 package marking table 11. package marking figure 19. package marking, top view part number t src delay control smart reset? inputs (1) 1. al = active-low, ah = active-high, pu = with internal pull-up resistor, od = open-drain. power-on reset, v cc monitoring rst 1 output (1) rst 2 output (1) t rec option topmark STM6522AAAADG6F c src al ? al, od al, od a aal am00479 a bc d e topmark a = dot (pin 1 reference) b = assembly plant (p) c = assembly year (y, 0-9): 9 = 2009 etc. d = assembly work week (ww, 01 to 52): 20 = ww20 etc. e = marking area (topmark)
revision history stm6522 24/25 doc id 17045 rev 2 11 revision history table 12. document revision history date revision changes 03-feb-2010 1 initial release. 10-may-2010 2 updated title, features , applications , section 1 , figure 1 , ta ble 1 , figure 2 , figure 3 , figure 4 , figure 5 , figure 6 , section 2.4 , figure 7 , note 1 below ta b l e 2 , section 2.6 , added section 2.7 , section 3 , ta b l e 5 , ta b l e 6 , ta ble 7 , ta b l e 1 0 , section 8 , table 11 .
stm6522 doc id 17045 rev 2 25/25 please read carefully: information in this document is provided solely in connection with st products. stmicroelectronics nv and its subsidiaries (?st ?) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described he rein at an y time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a particular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by an authorized st representative, st products are not recommended, authorized or warranted for use in military, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or registered trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2010 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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