m i c r o c h i p t e c h n o l o g y i n c . ? t h e e m b e d d e d c o n t r o l s o l u t i o n s c o m p a n y ? serial output temperature sensor family the tc74 is a temperature sensor with an on-board thermal diode and an smbus? compatible interface. the TCN75 is a temperature sensor with an on-board thermal diode and a 2-wire serial interface. the tc72 and tc77 are temperature sensors with an on-board thermal diode and an spi? compatible interface. microchips serial (digital) output temperature sensors offer excellent temperature accuracy (0.5c typical) with a very low operating current of less than 250 a. communication with the devices is accomplished via an industry standard smbus or spi compatible interface protocol. a standby mode is also available for further reducing the devices total current. all devices are offered in space saving packages and feature very fast temperature conversion times. temperature resolution for the entire family ranges from 0.0625c to 1c. these temperature sensors are fully specified from 2.7v to 5.5v and allow temperature measurement over an extended -55c to +125c temperature range, (-40c to +125c for the tc74). several features provided on select devices, address a broad application spectrum: interrupt output for thermal event alarm, external address pins for multi-drop capability, programmable trip point for maximum flexibility and small footprints for saving board space. high accuracy, low operating current, small size and ease of use make these devices ideal for implementing sophisticated thermal management schemes in a variety of systems. typical applications include, pcs, servers, datacom equipment, hard drives, set-top boxes, storage equipment, consumer electronics, power supplies, communication devices, office electronics and amplifiers. features: ? typical accuracy as high as 0.5c ? operating current as low as 200 a ? 2-wire smbus ? compatible interface ? 3-wire to 4-wire spi ? compatible interfaces ? standby mode for power savings, (as low as 0.1 a) ? high temperature resolution (0.0625c to 1c) ? fast temperature conversion times ? small sot-23, msop and dfn packages related application note: ? an679 temperature sensing technologies
microchip technology inc. ? 2355 w. chandler blvd. ? chandler, az 85224-6199 ? (480) 792-7200 ? fax (480) 792-9210 additional information: ? microchips web site: www.microchip.com ? microchips technical library cd-rom , order no. ds00161 ? analog & interface families data book 2002 , order no. ds00207 ? product line card , order no. ds00148 ? 2002 technical documentation analog & interface product familie s cd-rom, order no. ds51205 ? tc72 data sheet , ds21743 ? tc74 data sheet , ds21462 ? tc77 data sheet , ds20092 ? TCN75 data sheet , ds21490 development tools support: tc74 evaluation and demonstration kit (ds21557): the tc74 demo is an evaluation and demonstration board specifically designed to support microchips tc74, a 2-wire serial temperature sensor. communication with the tc74 is accomplished with a pc running the communication software. serial output temperature sensor family product interface max accuracy (+25c to +65c) temperature range v cc range typical i q typical i shdn resolution # of pins/ package features tc72 4-wire spi? 1.5c -55c to 125c 2.65v to 5.5v 250 a 0.1 a 0.25c 8ms, 8mf leadless package tc74 2-wire smbus? 2c -40c to 125c 2.7v to 5.5v 200 a 5 a 1c 5at, 5ct to-220 package tc77 3-wire spi 1c -55c to 125c 2.7v to 5.5v 250 a 0.1 a 0.0625c 8ms, 5ct high resolution TCN75 2-wire smbus 2c -55c to 125c 2.7v to 5.5v 250 a 1 a 0.5c 8ms, 8sn multi-droppable, interrupt output package ke y: at = to-220 ct = sot-23 ms = msop sn = soic mf = dfn development tools for analog and interface products from microchip filterlab? active filter software design tool mcp2510 can developers kit mcp2510 can evaluation/development tool mcp2120/2150 developers kit infrared products developers kit mcp250xx can i/o expanders developers kit mcp250xx can evaluation/development tool mxdev? 1 analog evaluation system mcp3201/02 evaluation daughter kit mcp3204/08 evaluation daughter kit mcp41xxx/mcp42xxx evaluation daughter kit evaluation kit for mcp devices analog-to-digital converter - four channel* analog-to-digital converter - four channel* digital pot evaluation and demonstration* tc642 demo board fan control module for tc64x devices tc642 evaluation kit evaluation kit for tc64x fan controllers tc650 demo board demo board for tc650/tc651 fan control ics tc652 demo board demo board for tc652/tc653 fan control ics tc74 demo board demo board for tc74 digital thermal sensor *note: requires mxdev ? analog evaluation kit. visit our web site at www.microchip.com for additional product information and your local sales office . information subject to change. the microchip name and logo are registered trademarks of microchip technology inc. in the u.s.a. and other countries. the embedded control solutions company, filterlab and mxdev are registered trademarks of microchip technology inc. in the u.s.a. all other trademarks mentioned herein are property of their respective owners. ? 2002 microchip technology inc. printed in the u.s.a. all rights reserved. ds21651c 9/02
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