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? 2002 microchip technology inc. ds21674b-page 1 tc07 features ? user programmable hysteresis and temperature set point easily programs with two external resistors wide temperature detection range - tc07cxa: -0c to +70c - tc07exa: -40c to +85c - tc07vxa: -40c to +125c 8-pin msop and 8-pin soic packages cost effective applications power supply over-temperature detection consumer equipment temperature regulators device selection table package type general description the tc07 is a programmable, logic output temperature detector that operates from power supply levels as low as 2.7v. programming is accomplished with external resistors connected from the temperature set point input (t set ) and the hysteresis control input (h set )to v dd . complementary outputs (out and out ) are driven active when temperature exceeds the temperature threshold programmed by the resistor on t set .the states of these outputs are maintained (latched) until temperature falls below threshold programmed by the resistor on h set . the tc07 has an operating temperature range of -40c to +125c (tc07vxa). it features low (<130 a) supply current and with 8-pin msop and 8-pin soic packages, making it suitable for a wide variety of applications. functional block diagram part number package temperature range tc07coa 8-pin soic 0c to +70c tc07cua 8-pin msop 0c to +70c TC07EOA 8-pin soic -40c to +85c tc07eua 8-pin msop -40c to +85c tc07voa 8-pin soic -40c to +125c tc07vua 8-pin msop -40c to +125c gnd t set h set soic v dd out out nc nc 18 27 36 45 tc07coa TC07EOA tc07voa gnd t set h set msop v dd out out nc nc 18 27 36 45 tc07cua tc07eua tc07vua t set out out temperature to voltage converter voltage reference generator temperature sensor h set v dd gnd + + ? ? s q r q 3v logic output temperature sensor with programmable hysteresis
tc07 ds21674b-page 2 ? 2002 microchip technology inc. 1.0 electrical characteristics absolute maximum ratings* supply voltage ........................................................ 7v input voltage any input . (gnd ? 0.3v) to (v dd +0.3v) operating temperature ...................... -40c to +125c storage temperature, t j ....................-65c to +150c *stresses above those listed under "absolute maximum rat- ings" may cause permanent damage to the device. these are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. expo- sure to absolute maximum rating conditions for extended periods may affect device reliability. tc07 electrical specifications electrical characteristics: t a = over operational temperature range, unless otherwise specified. symbol parameter min typ max unit test conditions v dd supply voltage range 2.7 ? 5.5 v i dd supply current ? 130 300 a2.7v ? 2002 microchip technology inc. ds21674b-page 3 tc07 2.0 pin descriptions thedescriptionsofthepinsarelistedintable2-1. table 2-1: pin function table 3.0 detailed description the tc07 programs with resistors connected from the t set and h set inputs to v dd . output pins out and out are driven active when the temperature exceeds the setting determined by the programming resistor on t set . the outputs are maintained (latched) in their active states until temperature drops below the setting determined by the programming resistor on h set (figure 3-1). figure 3-1: tc07 output waveforms pin no. (8-pin soic) (8-pin msop) symbol description 1 nc no internal connection 2h set absolute accuracy 3t set absolute accuracy 4 gnd ground 5out minimum hysteresis 6 out absolute accuracy 7 nc no internal connection 8v dd supply voltage range temperature out temperature set by resistor on t set hysteresis set by resistor on h set out
tc07 ds21674b-page 4 ? 2002 microchip technology inc. 4.0 typical applications 4.1 trip point programming the resistor values required to achieve the desired trip point temperatures on t set and h set are calculated using the formula below: for example, to program the tc07 outputs to go active at 50c and inactive at 30c, the r t and r h programming resistors are calculated as follows: resistance values for t set and h set canbeapproxi- mated using figure 4-1. care must be taken to ensure the h set programming resistor is a smaller value than the t set programming resistor. the temperature programmed on h set must be at least 5c lower than the temperature value programmed by t set . figure 4-1: programming resistor values vs. temperature 4.2 cooling and heating applications the tc07 can be used to control a dc fan as shown in figure 4-2. the fan turns on when the sensed temper- ature rises above the temperature set at t set and remains on until the temperature falls below the tem- perature set at h set . the amount of ?cooling" performed by the fan is dependent on the programmed hysteresis. figure 4-3 shows the tc07 acting as a heater thermo- stat. circuit operation is identical to that of the cooling fan application in figure 4-2. figure 4-2: tc07 as a fan controller r trip =0.6xt 2.13 where: r trip = programming resistor value in ohms t = desired trip point temperature in degrees kelvin. r t = 0.6 x ((50 + 273.15) 2.13 ) = 132.8k ? r h = 0.6 x ((30 + 273.15) 2.13 ) = 115.9k ? temperature ( c) resistance (k ? ) -55 -35 -15 5 25 45 65 85 105 125 50 100 150 200 250 temperature out fan "on" h set t set nc r t r h +2.7 to 5.5v +12v t set h set gnd v dd out nc logic level mosfet tc07 out + fan
? 2002 microchip technology inc. ds21674b-page 5 tc07 figure 4-3: tc07 as a heater thermostat temperature out heater "on" h set t set nc r t r h +2.7 to 5.5v +12v t set h set gnd v dd out nc logic level mosfet heater tc07 out
tc07 ds21674b-page 6 ? 2002 microchip technology inc. 5.0 packaging information 5.1 package marking information package marking data not available at this time. 5.2 taping form component taping orientation for 8-pin msop devices package carrier width (w) pitch (p) part per full reel reel size 8-pin msop 12 mm 8 mm 2500 13 in carrier tape, number of components per reel and reel size pin 1 user direction of feed standard reel component orientation for tr suffix device w p component taping orientation for 8-pin soic (narrow) devices package carrier width (w) pitch (p) part per full reel reel size 8-pin soic (n) 12 mm 8 mm 2500 13 in carrier tape, number of components per reel and reel size standard reel component orientation for tr suffix device pin 1 user direction of feed p w
? 2002 microchip technology inc. ds21674b-page 7 tc07 5.3 package dimensions 8-pin msop .122 (3.10) .114 (2.90) .122 (3.10) .114 (2.90) .043 (1.10) max. .006 (0.15) .002 (0.05) .016 (0.40) .010 (0.25) .197 (5.00) .189 (4.80) .008 (0.20) .005 (0.13) .028 (0.70) .016 (0.40) 6 max. .026 (0.65) typ. pin 1 dimensions: inches (mm) .050 ( 1.27 ) typ . 8 8 -pin so i c dimensions: inches (mm)
tc07 ds21674b-page 8 ? 2002 microchip technology inc. notes:
? 2002 microchip technology inc. ds21674b-page 9 tc07 sales and support data sheets products supported by a preliminary data sheet may have an errata sheet describing minor operational differences and recom- mended workarounds. to determine if an errata sheet exists for a particular device, please contact one of the following: 1. your local microchip sales office 2. the microchip corporate literature center u.s. fax: (480) 792-7277 3. the microchip worldwide site (www.microchip.com) please specify which device, revision of silicon and data sheet (include literature #) you are using. new customer notification system register on our web site (www.microchip.com/cn) to receive the most current information on our products.
tc07 ds21674b-page 10 ? 2002 microchip technology inc. notes:
? 2002 microchip technology inc. ds21674b-page 11 tc07 information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. it is your responsibility to ensure that your application meets with your specifications. no representation or warranty is given and no liability is assumed by microchip technology incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. use of microchip?s products as critical com- ponents in life support systems is not authorized except with express written approval by microchip. no licenses are con- veyed, implicitly or otherwise, under any intellectual property rights. trademarks the microchip name and logo, the microchip logo, filterlab, k ee l oq ,microid, mplab,pic,picmicro,picmaster, picstart, pro mate, seeval and the embedded control solutions company are registered trademarks of microchip tech- nology incorporated in the u.s.a. and other countries. dspic, economonitor, fansense, flexrom, fuzzylab, in-circuit serial programming, icsp, icepic, microport, migratable memory, mpasm, mplib, mplink, mpsim, mxdev, picc, picdem, picdem.net, rfpic, select mode and total endurance are trademarks of microchip technology incorporated in the u.s.a. serialized quick turn programming (sqtp) is a service mark of microchip technology incorporated in the u.s.a. all other trademarks mentioned herein are property of their respective companies. ? 2002, microchip technology incorporated, printed in the u.s.a., all rights reserved. printed on recycled paper. microchip received qs-9000 quality system certification for its worldwide headquarters, design and wafer fabrication facilities in chandler and tempe, arizona in july 1999 and mountain view, california in march 2002. the company?s quality system processes and procedures are qs-9000 compliant for its picmicro ? 8-bit mcus, k ee l oq ? code hopping devices, serial eeproms, microperipherals, non-volatile memory and analog products. in addition, microchip?s quality system for the design and manufacture of development systems is iso 9001 certified.
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