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data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 1 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| features ? 2-stage operational amplifier as filter ? built-in noise rejection circuit ? on-chip regulator ? override function ? synchronous with ac 220v/50hz and 110v/60hz ? pulse output (pt8a261) for triac drive or level output (PT8A262) for relay drive ? cds to enable/disable output ? adjustable output on time duration ? on/auto/off selectable by mode pin ? auto-reset if the zc signal disappears over 3 seconds ? 40 seconds warm-up ? quick check mode for initial installation ? operating voltage: 5v ? stand-by current: 80a general description the pt8a261 and PT8A262 are low power mixed signal cmos lsi designed for the automatic lamp control using pir sensor as motion detector. with on chip noise filter and voltage regulator, the ic provides stable operations throughout temperature range. cds input to disable day time operation is desired. applications ? energy saving auto-switch in garden, kitchen, bathroom, corridor, storage or yard ? auto light in meeting room block diagram op2o op2n op2p op1o op1p op1n oscd oscs zc mode cds rst relay (for 262 only) triac (for 261 only) comparator latch circuit mode and cds control circuit control circuit voltage divider regulator delay oscillator system oscillator counter circuit delay circuit zero cross debounce output circuit _ + + _ v ee ordering information part number package pt8a261p / PT8A262p 16 - pin pdip pt8a261w / PT8A262w 16 - pin sop pt8a261de / PT8A262de die form
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 2 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| pad location pad location of pt8a261de cds zc oscs mode v cc v ee rst v cc nc 1470um 1710um gnd triac oscd op2p op2n op2o opip opin opio die no. pad coordinate pad name x coordinate y coordinate pad name x coordinate y coordinate gnd 570 65.4 nc 570 -268.6 triac 570 -101.6 v ee -570 232.4 oscd 570 399.4 rst 303.9 -687.2 oscs 570 232.4 op1p -44.8 689.2 zc -378.8 689.2 op1n -211.8 689.2 cds -30.1 -687.2 op1o -570 -435.6 mode 570 -435.6 op2p -570 -268.6 v cc -197.1 -687.2 op2n -570 -101.6 v cc 136.9 -687.2 op2o -570 65.4 note: substrate is connected to gnd
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 3 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| pad location of PT8A262de pad coordinate pad name x coordinate y coordinate pad name x coordinate y coordinate gnd 570 65.4 nc 570 -268.6 relay 570 -101.6 v ee -570 232.4 oscd 570 399.4 rst 303.9 -687.2 oscs 570 232.4 op1p -44.8 689.2 zc -378.8 689.2 op1n -211.8 689.2 cds -30.1 -687.2 op1o -570 -435.6 mode 570 -435.6 op2p -570 -268.6 v cc -197.1 -687.2 op2n -570 -101.6 v cc 136.9 -687.2 op2o -570 65.4 note: substrate is connected to gnd cds zc oscs mode v cc v ee rst v cc nc 1470um 1710um gnd relay oscd op2p op2n op2o opip opin opio die no.
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 4 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| pin assignment figure 2 pin description table 1 pin/pad name type description 261 262 1 1 gnd ground ground 2 relay o relay drive output through an external npn transistor, active high 2 triac o triac drive two-pulse output, active negative pulse. 3 3 oscd i/o output timing oscillator i/o, connected to an external rc to adjust output duration. 4 4 oscs i/o system oscillator i/o, connected to an external rc to set the system frequency. the system frequency = 16khz for normal application. 5 5 zc i schmitt input for ac zero crossing detection. 6 6 cds i connected to a cds voltage divider for daytime/night auto-detection. low input to this pin can disable pir input. cds is a schmitt trigger input with 5-second input debounce time. 7 7 mode i mode select, connecting to v cc - output always on, connection gnd - output always off, open - auto detection 8 8 v cc power power supply 9 9 v ee o internal voltage regulator output, 3.6v with respect to ground. connected to the drain of pir sensor 10 10 rst i chip reset input, active low, kept floating or connected an rc network 11 11 op1p i non-inverted input of first operational amplifier, connected directly to source of pir sensor 12 12 op1n i inverted input of first operational amplifier 13 13 op1o o output of first operational amplifier 14 14 op2p i non-inverted input of second operational amplifier. 15 15 op2n i inverted input of second operational amplifier 16 16 op2o o output of second operational amplifier pt8a261p/pt8a261w gnd triac 1 oscd oscs zc mode v cc op2o op2n op2p op1o op1n op1p rst v ee cds 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 top view PT8A262p/PT8A262w gnd relay 1 oscd oscs zc mode v cc op2o op2n op2p op1o op1n op1p rst v ee cds 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 top view
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 5 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| functional descriptions the pt8a261 and PT8A262 are cmos lsi chips designed for automatic pir lamp control. they can operate in 2-wire con- figuration for triac applications or in 3-wire configuration for relay applications. the device consists of operational amplifiers, a comparator, timer, a zero crossing detector, control circuit, a voltage regu- lator, a system oscillator, and an output timing oscillator. the pir sensor detects infrared power variations caused by motion of a human body and transfer to a voltage variation. if the pir output voltage variation conforms to criteria, the lamp is turned on for an adjustable duration. the pt8a261 (or 262) offers three operating modes (on, auto, off) which can be set through a mode pin. when the device is working in auto mode, the user can override the mode to switch it to test mode or manual on mode, or return to the auto mode by switching power switch. oscs and oscd pins oscs is a system oscillator i/o pin connected to an external rc to generate system frequency of 16khz. oscd is an output timing oscillator i/o pin. it?s connected to an external rc to obtain the desired turn-on duration by se- lecting various values of rc or using a variable resistor.f oscd is the frequency of oscd pin, output timing can be caculated as the formula: t d = 21504/f oscd cds input circuit cds is a cmos schmitt trigger input pin. it is used to distin- guish between day time and night time. when the input volt- age of cds is high the pir input is enabled, when cds low the pir input disabled. the input disable-to-enable debounce time is 5 seconds. connect this pin to v cc when not using it. the cds input is ignored when the triac or relay output is active. figure 4. output timing oscillator figure 5. cds input circuit cds rp v cc cds schmitt driver pt8a261/262 control circuit cds figure 3. system oscillator oscd c d r d 560k 200p c s r s pt8a261/ 262 oscs pt8a261/ 262 t d = 21504/f oscd cds pir disable enable < 5s > 5s enable figure 6. cds enable debounce cds status pir low day time disabled high night enabled table 2. cds pin function
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 6 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| mode mode is a tri-state input pin for operation mode selection. see the following table 3. override control : the term ?override? refers to the change of operating mode by switching the power switch twice within 3 seconds. when the chip is working in the auto mode (mode pin openned), the output is activated by a valid pir trigger signal and the output active duration is controlled by the oscd oscillation period. the lamp can be switched to on from the auto mode by either switching the mode pin to v cc or switching the power switch twice within 3 seconds. the de- vice can be toggled from on to auto by switching the power switch twice within 3 seconds again (override operation). if the chip is overridden to on and there is no further override operation, it will return to auto automatically after an inter- nal preset on time duration (8 hours). the override operation will cause the lamp flash (for triac version only). it will flash 3 times at 1hz rate when changing auto mode to other mode, and flash 3 times at 2hz rate when returning to auto mode. but no flash if mode is changed by switching the mode switch. see figure 7 for override timing. mode status operation mode description v cc on output is always on: relay pin sends high level for relay driving; triac pulse train output is synchronized by zc for triac driving. gnd off output is always off: relay pin sends low level for relay driving; triac pin sends high level for triac driving. open auto outputs remain in the off state until activated by a valid pir trigger input signal. when working in the auto mode, the device allows override control by switching the zc signal. table 3. operation modes by mode pin figure 7. override timing zc operating mode auto auto auto on flash flash flash flash on 8 hours flash is only for triac version rst pin rst is used to reset the device. it is internal pull-high and active low. the use of c rst can extend the power-on initial time. if the rst pin is openned (without crst), the initial time is 40 seconds. see figure 8. v cc gnd rest rst c rst figure 8. rst application example
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 7 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| power on initial the pir signal amplifier requires a warm up period after power- on. the input should be disabled during this period. in the auto mode within the first 10 seconds of the initial time the chip allows override control to enter the quickly in- stall mode.after 40s of the initial time the chip allows over- ride control between on and auto. it will remain in the warm up period if the total initial time has not elapsed after return- ing to auto. in case that the zc signal disappears more than 3 seconds, the chip will restart the initialization operation. however, the re- start initial time is always 40 seconds and cannot be extended by adding c rst to the rst pin as shown in figure 6. trigger the trigger timing is shown in figure 9. retrigger -- if another signal is attained in trigger hold time, the circuit will be retriggered, and the trigger hold time will be restarted from this time. figure 9. trigger timing comparator input +trigger level -trigger level cds output enable 5s relay triac test enable detect enable 10s test enable on on (note2) pulse out power on delay time 40s rst comparator output >24ms <24ms (note1) notes: 1. the output is activated if the trigger signal conforms to the following criteria: - more than 3 triggers within 2 seconds, - a trigger signal sustain duration > 0.34 seconds, and - 2 triggers within 2 seconds with pulse duration of one > 0.16 seconds. - the effective comparator output width is 24ms.(fosc=16khz) 2. the output duration is set by an external rc connected to the oscd pin.
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 8 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| maximum ratings (above which the useful life may be impaired. for user guidelines, not tested) storage temperature ............................................................ -40 o c to +125 o c supply voltage to ground potential (inputs & v cc only) .... -0.3 to +6.0v supply voltage to ground potential (outputs & d/o only) -0.3 to +6.0v dc input voltage ....................................................................... -0.3 to +6.0v dc output current ................................................................................. 20ma power dissipation .............................................................................. 500mw 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 operational sec- tions of this specification is not implied. exposure to absolute maximum rating conditions for ex- tended periods may affect reliability. sym description min typ max units v cc supply voltage 4.75 5.0 6.0 v v ih input high voltage (mode,rst) 0.8v cc - - v v il input low voltage (mode,rst) - - 0.2v cc v f sys system oscillator frequency 12.8 16 19.2 khz f dosc delay oscillator frequency 12.8 16 19.2 khz t a operation temperature -25 25 70 o c recommended operation conditions dc electrical characteristics sym description test conditions min typ max units i ih input high level leakage current(zc,cds) v ih = 4.5v -0.1 - 0.1 ma i il input low level leakage current(zc,cds) v il = 0.5v -0.1 - 0.1 ma i oh output source current (relay, triac) v oh = 4.5v -6 - - ma i ol output sink current (relay, triac) v ol = 0.5v 15 - - ma v th1 cds transfer high voltage 3.0 3.2 3.6 v v tl1 cds transfer low voltage 1.5 1.7 2.1 v v th2 zc transfer high voltage 2.6 2.9 3.2 v v tl2 zc transfer low voltage 1.0 1.4 1.6 v v th3 oscs transfer high voltage 2.2 2.4 2.8 v v tl3 oscs transfer low voltage 1.0 1.4 1.6 v v th4 oscd transfer high voltage 2.2 2.4 2.8 v v tl4 oscd transfer low voltage 0.4 0.6 0.8 v note: these specifications apply for v cc = 5.0v and -25 o c t a 70 o c, unless otherwise specified.
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 9 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| sym description test conditions min typ max units v ee output voltage no load 3.2 3.6 4.0 v v op2p noninverting input of op2 no load 1.6 1.8 2.0 v d v o line regulation 4.5v v cc 5.5v, i l = 1ma - 30 50 mv d v ldr load regulation v cc = 5v, 0.5ma i l 2ma - 60 100 mv i l regulator output current v cc = 5v 4 - - ma ac electrical characteristics voltage regulator operational amplifier and window comparator sym description test conditions min typ max units bw 3db bandwidth - 10 - - khz v th windows comparator threshold v cc = 5v 1.9 2.05 2.2 v v tl v cc = 5v 1.4 1.55 1.7 v
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 10 |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| sym description test conditions min typ max units f osc oscillator frequency v cc = 5v, r s = 560 w, c s = 200pf, see above fig 3 12.8 16 19.2 khz t zr zc pulse rise time - 30 100 ns t zf zc pulse fall time - 30 100 ns t zp zc pulse period 15.1 20 22.2 ms t zw zc pulse width 0.8 1 - ms t or triac pulse rise time - 30 100 ns t of triac pulse fall time - 30 100 ns t op triac pulse period 6.6 10 11 ms t ow triac pulse width 52 62.5 76 m s oscillator and zc input pulse and trigger output pulse figure 10. timing diagram zc t zr t z w t z p t zf triac t o f t o w t o p t o r sym description test conditions min typ max units i cc power supply current v cc = 5v, r s = 560k w ,c s =200p, r d = 560k w , c d = 200p, other input pins = gnd, all outputs float. see fig 3,4 - 80 100 m a i ccq quiescent power supply current v cc = 5v, all input pins = gnd, all outputs float. - 60 80 m a power dissipation
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 11 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| typical application circuits figure 11. two-wire application circuit of pt8a261 c10 0.68u/350v r 1 20 k 1 2 3 q 1 triac r 6 1m r1 2 22 k r 8 560 k r 4 1 m r 5 22 k r 9 1m r 3 56 k r1 4 68/2 w r 2 2.4 m 1n4148 1n40 07 1n40 07 c 3 201 c 5 20 3 c 2 203 3900p c 8 10 4 c 6 22uf/1 6v 22uf/ 16v c 1 100uf/1 6v c 4 100uf/1 6v c1 1 470uf/16v d 2 1n40 07 d s g sd62 22 d 1 6.2 v r 7 1 m c 9 10uf/1 6v r9 200k gnd triac oscd oscs zc cds mode v cc rst 10 v e e 9 op2 n 15 op1 p 11 op1 n 12 op1 o 13 op2 p 14 op2 o 16 pt8a261 r1 0 r13 cd s of f aut o sw 2 mode o n lam p 20~100 w sw 1 on/off override ac 110v~230v c12 c13 203 7 8 2 6 5 4 3 1 c7 d4 d5 d3
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 12 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| figure 12. three-wire application circuit of PT8A262 r12 3.3k r9 560k r8 1m r6 68/2w r7 2.4m d4 1n4148 d5 1n4007 c3 201 c6 3900p c9 470uf/16v c5 100uf/35v d6 1n4007 d7 5.1v r10 1m r14 4.7k gnd 1 relay 2 oscd 3 oscs 4 zc 5 cds 6 mode 7 v cc 8 PT8A262 r13 r1 cds off auto sw2 on lamp 20~100w on/off override ac 110v~230v d2 24v d3 24v q1 9014 k1 d1 in4148 r6 1m r12 22k r4 1m r5 22k r3 56k c13 203 c5 203 c2 203 c6 22uf/16v c12 22uf/16v c4 100uf/16v d s g sd6222 c10 10uf/16v rst 10 v ee 9 op2n 15 op1p 11 op1n 12 op1o 13 op2p 14 op2o 16 sw1 c11 0.68u/350v c13 3.3nf/63v mode
data sheet pt8a261/262 pir sensor light switch controller pt0075(04/03) ver:5 13 ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||| notes pericom technology inc. email: support@pti.com.cn web site: www.pti.com.cn, www.pti-ic.com china : no. 20 building, 3/f, 481 guiping road, shanghai, 200233, china tel: (86)-21-6485 0576 fax: (86)-21-6485 2181 asia pacific : unit 1517, 15/f, chevalier commercial centre, 8 wang hoi rd, kowloon bay, hongkong tel: (852)-2243 3660 fax: (852)- 2243 3667 u.s.a. : 2380 bering drive, san jose, california 95131, usa tel: (1)-408-435 0800 fax: (1)-408-435 1100 pericom technology incorporation 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 technology does not assume any responsibility for use of any circuitry described other than the circuitry embodied in pericom technology product. the company makes no representations that circuitry described herein is free from patent infringement or other rights, of pericom technology incorporation.

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