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rev.1.4 _00 temperature switch ic s-5841 series seiko instruments inc. 1 the s-5841 series is a temperature swit ch ic which detects the temperature with a temperature accuracy of 2.5 c. this ic restores the output voltage when the temperature drops to t he level of release temperature. the s-5841 operates at the lower power s upply voltage of 2.2 v and its current consumption is 10 a typ. due to cmos configuration. a temperature sensor with the negativ e temperature coefficient, a reference voltage generation circuit and a comparator are integrated on one chip, and enclosed into the small packages snt-6a and sot-23-5. ? features ? detection temperature : + 40 c to + 100 c, + 1 c steps, detection accuracy : 2.5 c ? low voltage operation : v dd (min.) = 2.2 v (when the detection temperature is + 55 c to + 100 c, ta = ? 40 c to + 100 c) ? low current consumption : 10 a typ. (ta = + 25 c) ? hysteresis temperature can be switched in 0 c, 2 c, 4 c and 10 c ? selectable output logic in active high or low ? selectable output form in cmos or nch open drain ? small packages : snt-6a, sot-23-5 ? lead-free product ? applications ? fan control ? air conditioning system ? various electronic device ? packages drawing code package name package tape reel land snt-6a pg006-a pg006-a pg006-a pg006-a sot-23-5 mp005-a mp005-a mp005-a ?
temperature switch ic s-5841 series rev.1.4 _00 seiko instruments inc. 2 ? block diagrams 1. cmos output product rt vdd vss hys1 hys2 *1 det logic circuit (selectable) delay circuit + ? temperature sensor reference voltage generation circuit *1. the hys2 pin is not equipped for the s-5841 with sot-23-5. figure 1 2. nch open drain output product rt vdd vss hys1 hys2 *1 det + ? temperature sensor delay circuit logic circuit (selectable) reference voltage generation circuit *1. the hys2 pin is not equipped for the s-5841 with sot-23-5. figure 2 temperature switch ic rev.1.4 _00 s-5841 series seiko instruments inc. 3 ? product name structure 1. product name s-5841 x xx x - xxxx g package abbreviation and ic packing specifications *1 i6t1: snt-6a, tape m5t1: sot-23-5, tape output form and output logic *2 a: cmos output (active high) b: cmos output (active low) c: nch open drain output (active high) d: nch open drain output (active low) detection temperature (t det ) *3 40 ~ 100 when the detection temperature is + 80 c, it is expressed as 80. when the detection temperature is + 100 c, it is expressed as a0. option *4 snt-6a a: hysteresis temperature switched in 0 c, 2 c, 4 c and 10 c sot-23-5 a: hysteresis temperature switched in 2 c and 10 c b: hysteresis temperature switched in 4 c and 10 c product name *1. refer to the tape specifications. *2. the output at the det pin is selectable in either active high or low. the output at the det pin is selectable in either cmos or nch open drain. *3. the detection temperature (t det ) can be set in the range of + 40 c to + 100 c at + 1 c step. (we offer a detection temperature setting for each customer individually. contact our sales office for details.) *4. the hysteresis temperat ure can be switched in 0 c, 2 c, 4 c, 10 c, and is set by the hys1 pin and hys2 pin in the s-5841 with snt-6a package. the hysteresis temperature is set by hys1 pin in th e s-5841 with sot-23-5 package. by option, the hysteresis temperature of the product is selectable in 2 c and 10 c / 4 c and 10 c. temperature switch ic s-5841 series rev.1.4 _00 seiko instruments inc. 4 2. product list (1) snt-6a table 1 product name / item detection temperature (t det ) det pin output logic det pin output form hysteresis temperature s-5841a70a-i6t1g + 70 c active high cmos 0 c, 2 c, 4 c, 10 c s-5841a80a-i6t1g + 80 c active high cmos 0 c, 2 c, 4 c, 10 c s-5841a90a-i6t1g + 90 c active high cmos 0 c, 2 c, 4 c, 10 c s-5841a50d-i6t1g + 50 c active low nch open drain 0 c, 2 c, 4 c, 10 c remark please contact our sales office for produc ts other than those specified above. (2) sot-23-5 table 2 product name / item detection temperature (t det ) det pin output logic det pin output form hysteresis temperature s-5841a55d-m5t1g + 55 c active low nch open drain 2 c, 10 c S-5841A65D-M5T1G + 65 c active low nch open drain 2 c, 10 c s-5841a75d-m5t1g + 75 c active low nch open drain 2 c, 10 c s-5841a85d-m5t1g + 85 c active low nch open drain 2 c, 10 c s-5841a95d-m5t1g + 95 c active low nch open drain 2 c, 10 c remark please contact our sales office for produc ts other than those specified above. temperature switch ic rev.1.4 _00 s-5841 series seiko instruments inc. 5 ? pin configurations table 3 pin no. symbol description 1 rt *1 test pin 2 vss gnd pin 3 hys1 *2 hysteresis pin 1 4 det output pin 5 hys2 *2 hysteresis pin 2 6 vdd power supply pin snt-6a top view 1 2 3 6 5 4 figure 3 *1. set the rt pin open in use. *2. fix the hys1 pin and the hys2 pin as vdd or vss in use. remark see dimensions for details of the package drawings. table 4 pin no. symbol description 1 hys1 *1 hysteresis pin 1 2 vss gnd pin 3 rt *2 test pin 4 vdd power supply pin 5 det output pin sot-23-5 top view 1 4 3 5 2 figure 4 *1. the hys2 pin is not equipped for the s-5841 with sot-23-5. fix hys1 pin as vdd or vss. *2. set the rt pin open in use. remark see dimensions for details of the package drawings. temperature switch ic s-5841 series rev.1.4 _00 seiko instruments inc. 6 ? absolute maximum ratings table 5 (ta = + 25 c unless otherwise specified) item symbol absolute maximum ratings unit power supply voltage (v ss = 0 v) v dd v ss + 12 v pin voltage v rt , v hys1 , v hys2 v ss ? 0.3 to v dd + 0.3 v cmos output v ss ? 0.3 to v dd + 0.3 v output voltage nch open drain v det v ss ? 0.3 to v ss + 12 v snt-6a 400 *1 mw power dissipation sot-23-5 p d 600 *1 mw operating ambient temperature t opr ? 40 to + 125 c storage temperature t stg ? 55 to + 150 c * 1. when mounted on board [mounted board] (1) board size : 114.3 mm 76.2 mm t1.6 mm (2) board name : jedec standard51-7 caution the absolute maximum ratings are rated values exceeding which the product could suffer physical damage. these values must therefore not be exceeded under any conditions. temperature switch ic rev.1.4 _00 s-5841 series seiko instruments inc. 7 ? dc electrical characteristics 1. cmos output product (1) snt-6a package table 6 (ta = + 25 c, unless otherwise specified) item symbol condition min. typ. max. unit test circuit + t d = + 55 c to + 100 c 2.2 ? 10.0 v 1 power supply voltage *1 v dd + t d = + 40 c to + 54 c 2.6 ? 10.0 v 1 detection temperature + t d ? t det ? 2.5 t det t det + 2.5 c 1 hys1 hys2 ? ? ? ? ? ?h? ?h? ? 2 ? c 1 ?h? ?l? ? 4 ? c 1 ?l? ?h? ? 10 ? c 1 hysteresis of detection temperature *2 t hys ?l? ?l? ? 0 ? c 1 i deth v det = 2.2 v 2 9.4 ? ma 2 output current i detl v dd = 3.0 v, apply for det pin v det = 0.4 v 0.5 2.3 ? ma 2 current consumption during operation i dd v dd = 3.0 v ? 10 20 a 1 hys1 pin input voltage ?h? v ih ? 0.8 v dd ? ? v 3 hys1 pin input voltage ?l? v il ? ? ? 0.2 v dd v 3 hys1 pin input current ?h? i ih v dd = 3.0 v, v hys1 = 3.0 v ? 0.1 ? 0.1 a 3 hys1 pin input current ?l? i il v dd = 3.0 v, v hys1 = 0 v ? 0.1 ? 0.1 a 3 hys2 pin input voltage ?h? v ih ? 0.8 v dd ? ? v 3 hys2 pin input voltage ?l? v il ? ? ? 0.2 v dd v 3 hys2 pin input current ?h? i ih v dd = 3.0 v, v hys2 = 3.0 v ? 0.1 ? 0.1 a 3 hys2 pin input current ?l? i il v dd = 3.0 v, v hys2 = 0 v ? 0.1 ? 0.1 a 3 *1. the minimum operation voltages are as follows under the operation ambient temperature over + 100 c. the detection temperature + 55 c to + 100 c, v dd (min.) = 2.3 v the detection temperature + 40 c to + 54 c, v dd (min.) = 2.7 v *2. the hysteresis temperature can be switched in 0 c, 2 c, 4 c, 10 c, and is set by the hys1 pin and hys2 pin in the s-5841 with snt-6a package. [fahrenheit ? celsius conversion equation] c = ( f ? 32) 5 / 9 f = 32 + c 9 / 5 temperature switch ic s-5841 series rev.1.4 _00 seiko instruments inc. 8 (2) sot-23-5 package table 7 (ta = + 25 c, unless otherwise specified) item symbol condition min. typ. max. unit test circuit + t d = + 55 c to +100 c 2.2 ? 10.0 v 1 power supply voltage *1 v dd + t d = + 40 c to +54 c 2.6 ? 10.0 v 1 detection temperature + t d ? t det ? 2.5 t det t det + 2.5 c 1 hysteresis option hys1 ? ? ? ? ? ?h? ? 2 ? c 1 a ?l? ? 10 ? c 1 ?h? ? 4 ? c 1 hysteresis of detection temperature *2 t hys b ?l? ? 10 ? c 1 i deth v det = 2.2 v 2 9.4 ? ma 2 output current i detl v dd = 3.0 v, apply for det pin v det = 0.4 v 0.5 2.3 ? ma 2 current consumption during operation i dd v dd = 3.0 v ? 10 20 a 1 hys1 pin input voltage ?h? v ih ? 0.8 v dd ? ? v 3 hys1 pin input voltage ?l? v il ? ? ? 0.2 v dd v 3 hys1 pin input current ?h? i ih v dd = 3.0 v, v hys1 = 3.0 v ? 0.1 ? 0.1 a 3 hys1 pin input current ?l? i il v dd = 3.0 v, v hys1 = 0 v ? 0.1 ? 0.1 a 3 *1. the minimum operation voltages are as follows under the operation ambient temperature over + 100 c. the detection temperature + 55 c to + 100 c, v dd (min.) = 2.3 v the detection temperature + 40 c to + 54 c, v dd (min.) = 2.7 v *2. in the s-5841 with sot-23-5 package, the hyster esis temperature can be set by the hys1 pin. these two types are selectable by option. hysteresis option a : 2 c of hysteresis temperature during hys1 = high level, 10 c of hysteresis temperature during hys1 = low level hysteresis option b : 4 c of hysteresis temperature during hys1 = high level, 10 c of hysteresis temperature during hys1 = low level [fahrenheit ? celsius conversion equation] c = ( f ? 32) 5 / 9 f = 32 + c 9 / 5 temperature switch ic rev.1.4 _00 s-5841 series seiko instruments inc. 9 2. nch open drain output (1) snt-6a package table 8 (ta = + 25 c, unless otherwise specified) item symbol condition min. typ. max. unit test circuit + t d = + 55 c to + 100 c 2.2 ? 10.0 v 1 power supply voltage *1 v dd + t d = + 40 c to + 54 c 2.6 ? 10.0 v 1 detection temperature + t d ? t det ? 2.5 t det t det + 2.5 c 1 hys1 hys2 ? ? ? ? ? ?h? ?h? ? 2 ? c 1 ?h? ?l? ? 4 ? c 1 ?l? ?h? ? 10 ? c 1 hysteresis of detection temperature *2 t hys ?l? ?l? ? 0 ? c 1 output current i detl v det = 0.4 v, v dd = 3.0 v 0.5 2.3 ? ma 2 leakage current i leak v det = 10.0 v, v dd = 3.0 v ? ? 100 na 2 current consumption during operation i dd v dd = 3.0 v ? 10 20 a 1 hys1 pin input voltage ?h? v ih ? 0.8 v dd ? ? v 3 hys1 pin input voltage ?l? v il ? ? ? 0.2 v dd v 3 hys1 pin input current ?h? i ih v dd = 3.0 v, v hys1 = 3.0 v ? 0.1 ? 0.1 a 3 hys1 pin input current ?l? i il v dd = 3.0 v, v hys1 = 0 v ? 0.1 ? 0.1 a 3 hys2 pin input voltage ?h? v ih ? 0.8 v dd ? ? v 3 hys2 pin input voltage ?l? v il ? ? ? 0.2 v dd v 3 hys2 pin input current ?h? i ih v dd = 3.0 v, v hys2 = 3.0 v ? 0.1 ? 0.1 a 3 hys2 pin input current ?l? i il v dd = 3.0 v, v hys2 = 0 v ? 0.1 ? 0.1 a 3 *1. the minimum operation voltages are as follows under the operation ambient temperature over + 100 c. the detection temperature + 55 c to + 100 c, v dd (min.) = 2.3 v the detection temperature + 40 c to + 54 c, v dd (min.) = 2.7 v *2. the hysteresis temperature can be switched in 0 c, 2 c, 4 c, 10 c, and is set by the hys1 pin and hys2 pin in the s-5841 with snt-6a package. [fahrenheit ? celsius conversion equation] c = ( f ? 32) 5 / 9 f = 32 + c 9 / 5 temperature switch ic s-5841 series rev.1.4 _00 seiko instruments inc. 10 (2) sot-23-5 package table 9 (ta = + 25 c, unless otherwise specified) item symbol condition min. typ. max. unit test circuit + t d = + 55 c to + 100 c 2.2 ? 10.0 v 1 power supply voltage *1 v dd + t d = + 40 c to + 54 c 2.6 ? 10.0 v 1 detection temperature + t d ? t det ? 2.5 t det t det + 2.5 c 1 hysteresis option hys1 ? ? ? ? ? ?h? ? 2 ? c 1 a ?l? ? 10 ? c 1 ?h? ? 4 ? c 1 hysteresis of detection temperature *2 t hys b ?l? ? 10 ? c 1 output current i detl v det = 0.4 v, v dd = 3.0 v 0.5 2.3 ? ma 2 leakage current i leak v det = 10.0 v, v dd = 3.0 v ? ? 100 na 2 current consumption during operation i dd v dd = 3.0 v ? 10 20 a 1 hys1 pin input voltage ?h? v ih ? 0.8 v dd ? ? v 3 hys1 pin input voltage ?l? v il ? ? ? 0.2 v dd v 3 hys1 pin input current ?h? i ih v dd = 3.0 v, v hys1 = 3.0 v ? 0.1 ? 0.1 a 3 hys1 pin input current ?l? i il v dd = 3.0 v, v hys1 = 0 v ? 0.1 ? 0.1 a 3 *1. the minimum operation voltages are as follows under the operation ambient temperature over + 100 c. the detection temperature + 55 c to + 100 c, v dd (min.) = 2.3 v the detection temperature + 40 c to + 54 c, v dd (min.) = 2.7 v *2. in the s-5841 with sot-23-5 package, the hyster esis temperature can be set by the hys1 pin. these two types are selectable by option. hysteresis option a : 2 c of hysteresis temperature during hys1 = high level, 10 c of hysteresis temperature during hys1 = low level hysteresis option b : 4 c of hysteresis temperature during hys1 = high level, 10 c of hysteresis temperature during hys1 = low level [fahrenheit ? celsius conversion equation] c = ( f ? 32) 5 / 9 f = 32 + c 9 / 5 ? ac electrical characteristics table 10 item symbol condition min. typ. max. unit test circuit noise suppression time t delay v dd = 3.0 v, ta = detection temperature ? 380 ? s ? temperature switch ic rev.1.4 _00 s-5841 series seiko instruments inc. 11 ? test circuit 1. rt vdd vdd or vss vss hys1 hys2 *2 det s-5841 series open a v v r *1 100 k ? c l c in *1. resistor is unnecessary for the cmos output product. *2. the hys2 pin is not equipped for the s-5841 with sot-23-5. figure 5 2. rt vdd vss hys1 hys2 *1 det a v v c l c in vdd or vss s-5841 series open *1. the hys2 pin is not equipped for the s-5841 with sot-23-5. figure 6 3. rt vdd vss hys1 hys2 *2 det s-5841 series open a a v v c l c in r *1 100 k ? *1. resister is unnecessary for the cmos output product. *2. the hys2 pin is not equipped for the s-5841 with sot-23-5. figure 7 temperature switch ic s-5841 series rev.1.4 _00 seiko instruments inc. 12 ? operation basic operation the s-5841 series is a temperature switch ic which detects a certain temperature and sends a signal to an external device. various combinations of the parameters such as the detection temperature, output form and output logic can be selected. the following explains the case when det output is assumed to be active high and cmos output. after applying the power supply, the ic starts to detect the temperature. if it is lower than the detection temperature ( + t d ), the det pin keeps its status in low level. the temp erature rises and exceeds the detection temperature, the det pin becomes high level. after the detection, t he temperature drops and reache s the release temperature ( + td ? t hys ), the det pin returns to low level. figure 8 is the timing chart. v ss output from the det pin ambient temperature (t) v dd detection temperature ( + t d ) hysteresis temperature (t hys ) release temperature ( + t d ? t hys ) figure 8 operation when the output from det pin is active high [hysteresis setting] in the s-5841 with snt-6a package, the hyst eresis temperature can be switched in 0 c, 2 c, 4 c, 10 c, and is set by the hys1 pin and hys2 pin. in the s-5841 with sot- 23-5 package, the hysteresis temperature can be set by the hys1 pin. by option, the hysteresis temper ature of the product is selectable in 2 c and 10 c / 4 c and 10 c. table 11 snt-6a package setting pin hys1 hys2 hysteresis temperature ( c) ?h? ?h? 2 ?h? ?l? 4 ?l? ?h? 10 ?l? ?l? 0 temperature switch ic rev.1.4 _00 s-5841 series seiko instruments inc. 13 table 12 sot-23-5 package (1) hysteresis option = a setting pin hys1 hysteresis temperature ( c) ?h? 2 ?l? 10 (2) hysteresis option = b setting pin hys1 hysteresis temperature ( c) ?h? 4 ?l? 10 [delay circuit] in order to prevent error, s-5841 series has noise suppression time (t delay ). the followings are about the action when det output is in active high. if the temperature is lower than the detection temperature ( + t d ), the det pin is in low le vel. although the output from the comparator goes in active due to no ise, if the period in which this st atus continues is shorter than noise suppression time, the det pin keeps its setting low level. af ter that, the output from the comparator goes in active because the temperature rises and exceeds the detection temperatur e, so that the period exceeds more than noise suppression time, the det pin is set in high level. temperature switch ic s-5841 series rev.1.4 _00 seiko instruments inc. 14 ? application circuit rt vdd vss hys1 hys2 *2 det r *1 100 k ? c l c in vdd or vss s-5841 series open *1. resistor is unnecessary for the cmos output product. *2. the hys2 pin is not equipped for the s-5841 with sot-23-5. figure 9 application circuit caution the above connection diagram will not guarant ee successful operation. perform thorough evaluation using actual application to set the constant. ? precautions ? set a capacitor (c in ) of about 0.1 f between the vdd and vss pin for stabilization. ? set a capacitor (c l ) of about 1 f for the det pin to prevent malfuncti on caused by the noise when the power supply is applied. ? the ic may oscillate by setting a capacitor to the rt pin. set the rt pin open in use. ? if the rt pin is short-circuited to vss, the det pin becomes active in this ic. ? fix the hys1 pin and the hy s2 pin vdd or vss in use. ? do not apply an electrostatic discharge to this ic that exceeds the performance ratings of the built-in electrostatic protection circuit. ? sii claims no responsibility for any disputes arising out of or in connection with any infringement by products, including this ic, of patents owned by a third party. temperature switch ic rev.1.4 _00 s-5841 series seiko instruments inc. 15 ? characteristics (typical data) 1. current consumption vs. power supply voltage characteristics 1234 i dd [ a] 14 13 12 11 10 8 9 06789101112 5 v dd [v] ? 40 c + 25 c + 100 c + 125 c 2. det pin current ?h? vs. power supply voltage characteristics (cmos output product only) 1234 i deth [ma] 30 25 20 15 10 0 5 06789101112 5 v dd [v] ? 40 c + 25 c + 100 c + 125 c 3. det pin current ?l? vs. power supply voltage characteristics 1234 i detl [ma] 10 8 6 4 0 2 06789101112 5 v dd [v] ? 40 c + 25 c + 100 c + 125 c 4. noise suppression time (t delay ) vs. power supply voltage characteristics 1234 t delay [ s] 1500 1250 1000 750 500 0 250 06789101112 5 v dd [v] temperature switch ic s-5841 series rev.1.4 _00 seiko instruments inc. 16 5. response against heat output voltage (v det ) vs. time (t) (1) when packages are put into the air of + 100 degrees from the air of + 25 degrees at t = 0 s v dd = 3.0 v, c l = 0 f, detection temperature = + 70 c, active low ? 20 2 1 0 ? 1 4 3 02040 ? 10 10 30 50 60 v det [v] t [s] (2) when packages are put into the liquid of + 100 degrees from the air of + 25 degrees at t = 0 s v dd = 3.0 v, c l = 0 f, detection temperature = + 70 c, active low ? 20 2 1 0 ? 1 4 3 02040 ? 10 10 30 50 60 v det [v] t [s] 6. response against startup (1) the detection temperature or lower (t ?+ t d ) c l = 0 f, active low t (100 s / div.) v dd (= 3.0 v) det 1 v / div. gnd 1 v / div. gnd (2) higher than the detection temperature (t > ?+ t d ) c l = 0 f, active low t (100 s / div.) v dd (= 3.0 v) det 1 v / div. gnd 1 v / div. gnd temperature switch ic rev.1.4 _00 s-5841 series seiko instruments inc. 17 ? marking specifications 1. snt-6a (1) to (3) : product code (refer to product name vs. product code ) (4) to (6) : lot number snt-6a top view 1 2 3 6 5 4 (1) (3) (2) (4) (6) (5) product name vs. product code product code product name (1) (2) (3) s-5841a70a-i6t1g t i g s-5841a80a-i6t1g t i h s-5841a90a-i6t1g t i i s-5841a50d-i6t1g t h a remark please contact our sales office for the products other than thos e specified above. 2. sot-23-5 (1) to (3) : product code (refer to product name vs. product code ) (4) : lot number sot-23-5 top view 1 4 3 5 2 (1) (3) (2) (4) product name vs. product code product code product name (1) (2) (3) s-5841a55d-m5t1g t h b S-5841A65D-M5T1G t h c s-5841a75d-m5t1g t h d s-5841a85d-m5t1g t h e s-5841a95d-m5t1g t h f remark please contact our sales office for the products other than thos e specified above. !" " # $ %& $& ! ' (( !$ !$ )$ #$ ) $" * $ + +, $ #$ $ ! & $ +- .& )$& /*0 /*0 12 3$ 3$ 4+5 ((+657 +4,+ 3 4 8 +(3 (+ & & & & & $& + =+57 6 ,+ ( 7 ,++5 ,;4 ?6 @ 8 7+7 ,++5 +<; ,+ (( 7 7 +( ;<7 4 ,5+( :+4( 7 ,+ ; + 7,++5 ( 7+@ 7 +(:: ! "# # $ "# # $ %! #&'$ ( ( ! ! "# $ "# $ %! ) )* + ,, -*. /0 )1 ! (! -20 -20 34 !5 "# 6 $ "# 6 $ %! 6 7 7)8 ,,)98. )7*) the information described herein is subject to change without notice. seiko instruments inc. is not responsible for any problems caused by circuits or diagrams described herein whose related industrial properties, patents, or other rights belong to third parties. the application circuit examples explain typical applications of the products, and do not guarantee the success of any specific mass-production design. when the products described herein are regulated products subject to the wassenaar arrangement or other agreements, they may not be exported without authorization from the appropriate governmental authority. use of the information described herein for other purposes and/or reproduction or copying without the express permission of seiko instruments inc. is strictly prohibited. the products described herein cannot be used as part of any device or equipment affecting the human body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus installed in airplanes and other vehicles, without prior written permission of seiko instruments inc. although seiko instruments inc. exerts the greatest possible effort to ensure high quality and reliability, the failure or malfunction of semiconductor products may occur. the user of these products should therefore give thorough consideration to safety design, including redundancy, fire-prevention measures, and malfunction prevention, to prevent any accidents, fires, or community damage that may ensue. |
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