|||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| universal timer controller 2013 - 12 - 0013 pt02 46 - 4 01 / 03 / 1 4 1 pt 8 a 2521 - 2 3/31 - 3 3/41 - 4 3 features ? auto - shut off output once time - out ? b utton to on/off/reset timer ? available timer with high precision same as ac 50/60 h z ? build - in rc oscillator ? d rive external scr ? s upport 50/60hz by part ? quick t est mode (qtm) for manufacturer ? a vailable timer of 15 /30/45/60/90/120 /240/480 min ? low cost lead free package : to - 92 or dip - 8 or soic - 8 description universal timer is a mixed signal cmos ic designed for a fixed timer to drive external scr to implement safety power control. it is applied to 1 2 0 v/ 2 4 0 v and 50/60h z ac power supply . i t can a uto matically shut - off load in order to prevent undesired condition s from the system. internal timer can prese nt several kinds of different time: 15min s , 30min s , 45min s , 1hr, 1.5hr s , 2hrs , 4hrs and 8hrs , which is decided by part n umber. application s ? universal timer controller pin configuration pin description PT8A2521/2/3a - h, pt8a2531/2/3a - h pin name pin no i/o pin description vcc 1 - power supply scr 2 i/o scr output and button input, high active gnd 3 - ground p t8 a2541/2/3 pin name pin no. i/o pin description ts2 1 i t imer selection pins(ts2 ts1 ts0 from 000~111) 000: 15m, 001: 30m, 010: 45m, 011: 60m, 100: 90m, 101: 120m,110: 240m,111: 480m default 011 by ts2 internal pull down, ts1&ts0 internal pull up. ts1 2 i ts0 3 i gnd 4 - ground. scr 5 i/o scr output and button input, high active. nc 6 i/o no connection. acsel 7 i 50/60hz selection pin: default is 60hz by internal pull down; connec ting to vcc is 50hz. vcc 8 - power supply. PT8A2521/2/3a - h pt8a2531/2/3a - h to92 - 3 (top view) pt8a2541/2/3 dip - 8 or soic - 8 (top view) to92 - 3
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||| 2013 - 12 - 0013 pt02 46 - 4 01 / 03 / 1 4 2 pt 8 a 2521 - 2 3/31 - 3 3/41 - 4 3 universal timer controller maximum ratings sto rage temperature ................................ ................................ ................... - 40 o c to +1 25 o c supply voltage to ground potential (input & v cc only) .............. - 0.5v to v cc + 0 .5v supply voltage to ground potential (output s & d/o only) ....... - 0.5v to v cc + 0 .5v dc input voltage ................................ ................................ ................... - 0.5v to v cc + 0 .5v dc output current ................................ ................................ ...... 20 ma power diss ipation ................................ ................................ ................................ ......... 500mw recommended operation conditions symbol parameter min typ max unit v cc operating voltage 4.2 4.7 5.2 v t a operating temperature 0 25 85 electrical characteristics sy m parameter test condition s min typ max unit v cc condition s v cc shunt regulator output voltage - i cc =1ma 4. 2 4.7 5.2 v v t h1 input high threshold(scr) 5v - 3.6 4 4.4 v v t h 2 input low threshold(scr) 5v - 0. 3 0.65 1. 0 v i oh output source current (scr) 5v v oh1 =2.5v - 0. 2 - 0. 3 - 0. 4 ma i ol output sink current (scr) 5v v ol1 =0.5v 6 12 24 a i cc power supply current 4.0v - - - 0.5 ma f osc frequency of internal oscillator 5v - 96 128 160 khz note: stresses greater than those listed under maximum ratings may cause permanent damage to the device. this is a stress rating only and functional operation of the device at these or any other condi - tions above those indicated in the oper ational sec - tions of this specification is not implied. exposure to absolute maximum rating conditions for extended periods may affect reliability.
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||| 2013 - 12 - 0013 pt02 46 - 4 01 / 03 / 1 4 3 pt 8 a 2521 - 2 3/31 - 3 3/41 - 4 3 universal timer controller block diagram fun ctional description ( note : i n below description, relay presents a pin, while relay means a device. ) reference and shunt regulator reference circuit generates 1.2v vcc - independent and temperature - independent voltage to provide reference voltage for th e build - in shunt regulator. the regulator supplies all internal function blocks. clock extracting circuit vcc is not only the power supply pin but also clock source for internal precise timer. with the help of the external circuit, the ac 50/60hz clock si gnal can be extracted to be used as timer clock source. internal rc oscillator circuit it is employed to create pulse driving signal for relay, it is a completely internal rc oscillato r with frequency of about 128kh z . timer chain timer chain can be used to generate various timer including 15/30/45/60/90/120 /240/480 min . button sampling circuit with external buttons, on/off/reset function can be realized. user can select one button with once on, once off or two buttons to turn on or off separately, also us e one button to restart timer. button sampling circuit senses buttons operation 3 times per 8ms . system will sample the buttons operation during first 100ms after power on, if buttons are pressed during this period, then system will start 3s timer to che ck if the chip will enter into quick test mode (see test mode section). if the related button is pressed over 3s just after power on, chip will enter quick test mode as soon as the button is released. if buttons are not pressed during first 100ms, system w ill operate normally. scr driving circuit system outputs high to drive high sensitive scr. quick test mode(qtm) in order to make the manufacturers test convenient, quick test mode is designed to speed up the test. qtm can be accessed by pressing button (on/reset) over 3s (option 2s) once power on. it can exit automatically after quick test timer is expired, system needs to power on again to come back normal operation after quick test mode. any button operations will be ignored in qtm. below tabl e shows the timer in qtm corresponding to real timer. table real timer compared to the timer in qtm real timer 15m 30m 45m 60m 90m 120m 240 m 480 m timer in qtm 2 s 4 s 6 s 8 s 10 s 12s 1 4 s 1 6 s operation illustration of entering into and exiting quick test mode vc c gnd sc r figure 2 function block diagram ref erence circuit shunt regulator internal rc oscillator timer chain 15/30/45/60m/90m/2h/4h/8h scr driving circuit clock extracting circuit button sampling circuit ac sel pb o first pb on second pb on power on >3s *12s f or 2hrs 3s warm up fig 4 operation illustration of entering into and exitting quick test mode sampling time normal mode quick test mode will be ignored <100ms
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||| 2013 - 12 - 0013 pt02 46 - 4 01 / 03 / 1 4 4 pt 8 a 2521 - 2 3/31 - 3 3/41 - 4 3 universal timer controller application circuit note : scr is high sensitive scr which the gat e trigger current is about 200ua. *note 1 : for 1 2 0vac power supply system, r 1 value is 24k . for 2 4 0vac power supply system, r 1 value is 100k . note 2 : c1 value range is 22uf to 68uf. *note 1 : for 1 2 0vac power supply system, r 1 value is 24k . for 2 4 0va c power supply system, r 1 value is 100k . note 2 : c1 value range is 22uf to 68uf. 120v/240v 120v/240v c2 104 d1 in4007 r2 5.6k r3 3k r1 24k *1/2w acl acn s1 reset or on/off q1 to -92 uni versal ti mer to dri ve sc r wi th on e bu tton 110v/220 v c3 104 load c1 22uf/16v 3 2 1 vcc gnd scr u1 pt 8a2521/2-pt 8a2531/2 100k * 1/2w c2 104 d1 in4007 r2 5.6k r3 3k r1 24k *1/2w acl acn s1 on q1 to -92 uni versal ti mer to dri ve sc r wi th two bu ttons 110v/220 v c3 104 load c1 22uf/16v 3 2 1 vcc gnd scr u1 pt 8a2523-pt8a2533 100k * 1/2w s2 off
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||| 2013 - 12 - 0013 pt02 46 - 4 01 / 03 / 1 4 5 pt 8 a 2521 - 2 3/31 - 3 3/41 - 4 3 universal timer controller *note 1 : for 1 2 0vac /60hz power supply system, r1 value is 24k , acsel is connected to gnd or floating . for 2 4 0vac / 50hz power supply system, r1 value is 100k , acsel is con nected to vcc . *note 2 : ts0 , ts1 and ts2 are floating , the timer time out is 60 minutes. note 3 : c1 value range is 22uf to 68uf. *note 1 : for 1 2 0vac /60hz power supply system, r1 value is 24k , acsel is connected to gnd or floating . for 2 4 0vac /50hz power s upply system, r1 value is 100k , acsel is connected to vcc . *note 2 : ts0 , ts1 and ts2 are floating , the timer time out is 60 minutes. note 3 : c1 value range is 22uf to 68uf. r1 24k 1/2w * acl acn s1 res et or o n/o ff dip8 universal timer to drive scr with one button d1 in4007 c1 22u f/16v 120v/240v 100k 1/2w * c2 104 vcc ts1 2 ts0 3 ts2 1 gnd 4 scr 5 nc 6 acsel 7 vcc 8 u1 pt8a2541/2pe r2 5.6k r3 3k c3 104 q1 load k1 r1 24k 1/2w * acl acn s1 on dip8 universal timer to drive scr with two buttons d1 in4007 c1 22u f/16v s2 o ff 120v/240v 100k 1/2w * c2 104 vcc ts1 2 ts0 3 ts2 1 gnd 4 scr 5 nc 6 acsel 7 vcc 8 u1 pt8a2543pe r2 5.6k r3 3k c3 104 q1 load k1
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||| 2013 - 12 - 0013 pt02 46 - 4 01 / 03 / 1 4 6 pt 8 a 2521 - 2 3/31 - 3 3/41 - 4 3 universal timer controller mechanical information to92 - 3 l
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||| 2013 - 12 - 0013 pt02 46 - 4 01 / 03 / 1 4 7 pt 8 a 2521 - 2 3/31 - 3 3/41 - 4 3 universal timer controller dip - 8l
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||| 2013 - 12 - 0013 pt02 46 - 4 01 / 03 / 1 4 8 pt 8 a 2521 - 2 3/31 - 3 3/41 - 4 3 universal timer controller s oic - 8 l
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| |||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| ||||||||||||||||||||||||||||||||| 2013 - 12 - 0013 pt02 46 - 4 01 / 03 / 1 4 9 pt 8 a 2521 - 2 3/31 - 3 3/41 - 4 3 universal timer controller ordering informatio n ordering no. package code package PT8A2521xnbe * nb lead free to - 92 pt8a2522xnbe * nb lead free to - 92 pt8a2523xnbe * nb lead free to - 92 pt8a2531xnbe * nb lead free to - 92 pt8a2532xnbe * nb lead free to - 92 pt8a2533xnbe * nb lead free to - 92 pt8a2541pe * p lead free dip - 8 pt8a2542pe * p lead free dip - 8 pt8a2543pe * p lead free dip - 8 pt8a254 1w e w lead free and green soic - 8 pt8a254 2w e w lead free and green soic - 8 pt8a254 3w e * w lead free and green soic - 8 note: ? x shows a~h with different internal timer, see below suffix x: internal timer table. ? e = pb - free or pb - free & green ? adding x suffix = tape /r eel ? *contact pericom for availability. function comparison t able part no one/two key button 50/60 h z part no one/two key button 50/60 h z PT8A2521x one reset 5 0hz pt8a2531x one reset 60hz pt8a2522x one on/off 50hz pt8a2532x one on/off 60hz pt8a2523x two on, off 50hz pt8a2533x two on, off 60hz part no one/two key button 50/60 h z timer(min) pt8a2541 one reset optional optional pt8a2542 one on/off optional o ptional pt8a2543 two on, off optional optional suffix x : internal timer table suffix a b c d e f g h internal timer(min) 15 30 45 60 90 120 240 480 pericom semiconductor corporation ? 1 - 800 - 435 - 2336 ? www.pericom.com pericom reserves the right to make changes to its products or specifications at any time, without notice, in order to improve design or performance and to supply the best possible product. pericom does not assume any responsibility for use of any circuitry described other than the circuitry embodied in pericom product. the company makes no representations that circuitry described herein is free from patent i nfringement or other rights, of pericom .
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