ver: 1.6 aug 30, 2010 tel: 886-3-5788833 http://www.gmt.com.tw 1 G708 global mixed-mode technology inc. resistor-programmable sot temperature switches features ? 0.5 c typical threshold accuracy ? 3.5 c (max) threshold accuracy(0 c to +125 c) ? 3 c threshold accuracy(60 c to +100 c) ? temperature threshold set by a 1% external resistor ? low 33 a supply current ? open-drain active low output stage ? guaranteed reset valid to v cc = 0.8v ? pin-selectable 10 c or 30 c hysteresis ? sot-23-5 and tdfn2x2-8 packages applications ? p temperature monitoring in high-speed ? computers ? temperature control ? temperature alarms ? fan control ? automotive general description the G708 are fully integrated, resistor programmable temperature switches with thresholds set by an exter- nal resistor. they require only one external resistor to set the temperature threshold within a wide 0 c to +125 c temperature range. the G708 provides an open-drain, active low output. these switches operate with a +2.7v to +5.5v single supply while providing a temperature threshold accuracy of 0.5 c (typ) or 3.5 c (max) or 3 c (60 c to +100 c). they typi- cally consume 33 a supply current. hysteresis is pin selectable to 10 c or 30 c. the G708 are available in 5-pin sot-23 and tdfn2x2-8 packages. ordering information order number marking temp. range package (green) G708t1u 708xx -40 c~+125 c sot-23-5 G708rcu 708 -40 c~+125 c tdfn2x2-8 note: t1 : sot-23-5 rc: tdfn2x2-8 u : tape & reel is 2.63v pin configuration typical application circuit gnd p vcc gnd vcc set ot 470k 0.1 f r set hyst 150 2.7v to 5.5v G708 sot-23-5 5 1 2 hyst 4 3 ot set vcc gnd G708 tdfn2x2-8 1 2 3 4 8 7 6 5 gnd thermal pad vcc ot nc hyst G708 nc nc set note 1:thermal pad is nc note 2:connect thermal pad and pin 6,7,8 to heat source by pcb copper for good heat conduction. gnd p vcc gnd vcc set ot 470k 0.1 f r set hyst 150 2.7v to 5.5v G708 sot-23-5 5 1 2 hyst 4 3 ot set vcc gnd G708 tdfn2x2-8 1 2 3 4 8 7 6 5 gnd thermal pad vcc ot nc hyst G708 nc nc set note 1:thermal pad is nc note 2:connect thermal pad and pin 6,7,8 to heat source by pcb copper for good heat conduction.
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