TC621CEOA

TC620/TC621 5V, Dual Trip Point Temperature Sensors Features Package Type 8-PDIP User Programmable Hysteresis and Temperature Set Point NC V 1 8 DD Easily Programs with Two External Resistors HIGH LIMIT LOW SET 2 7 TC620XCPA Wide Temperature Detection Range: 3 TC620XEPA 6 LOW LIMIT HIGH SET 5 4 CONTROL - 0C to 70C: (TC620/TC621CCX) GND - -40C to +125C: (TC620/TC621CVX) 8-PDIP - -40C to +85C: (TC620/TC621CEX) Onboard Temperature Sensing Applications THERMISTOR V 1 8 DD (TC620X) HIGH LIMIT HIGH SET 2 7 TC621XCPA External NTC Thermistor for Remote Sensing 3 TC621XEPA 6 LOW LIMIT LOW SET Applications (TC621X) 5 4 CONTROL GND Available in 8-Pin PDIP and SOIC Packages 8-SOIC NC V Applications 1 8 DD LOW SET 2 7 LOW LIMIT TC620XCOA Power Supply Over Temperature Detection TC620XEOA HIGH LIMIT 3 6 HIGH SET Consumer Equipment TC620CVOA 4 GND 5 CONTROL Temperature Regulators 8-SOIC CPU Thermal Protection THERMISTOR V 1 8 DD HIGH LIMIT HIGH SET 2 7 Device Selection Table TC621XCOA 3 TC621XEOA 6 LOW LIMIT LOW SET Temperature Part Number Package 4 5 CONTROL GND Range TC620X*COA 8-Pin SOIC 0C to +70C General Description TC620X*CPA 8-Pin PDIP 0C to +70C The TC620 and TC621 are programmable logic output TC620X*EOA 8-Pin SOIC -40C to +85C temperature detectors designed for use in thermal TC620X*EPA 8-Pin PDIP -40C to +85C management applications. The TC620 features an TC620C*VOA 8-Pin SOIC -40C to +125C onboard temperature sensor, while the TC621 connects to an external NTC thermistor for remote TC621X*COA 8-Pin SOIC 0C to +70C sensing applications. TC621X*CPA 8-Pin PDIP 0C to +70C Both devices feature dual thermal interrupt outputs TC621X*EOA 8-Pin SOIC -40C to +85C (HIGH LIMIT and LOW LIMIT), each of which is pro- TC621X*EPA 8-Pin PDIP -40C to +85C grammed with a single external resistor. On the TC620, TC621C*VOA 8-Pin SOIC -40C to +125C these outputs are driven active (high) when measured temperature equals the user programmed limits. The Note: *The part code will be C or H (see CONTROL (hysteresis) output is driven high when tem- Functional Block Diagrams). perature equals the high limit setting and returns low when temperature falls below the low limit setting. This output can be used to provide ON/OFF control to a cooling fan or heater. The TC621 provides the same output functions except that the logical states are inverted. The TC620/TC621 are usable over operating temperature ranges of 0C to 70C, -40C to +125C. 2001-2015 Microchip Technology Inc. DS20001439E-page 1TC620/TC621 Functional Block Diagrams V DD 8 Temp. to Voltage 4 Converter TC620 + 7 LOW LIMIT 2 V REF LOW SET GEN V REF + 6 HIGH LIMIT 3 V REF HIGH SET GEN R S Q Q 5 CONTROL* V DD 8 Thermistor 1 Interface THERMISTOR 4 Circuit TC621 + 7 HIGH LIMIT 2 V REF HIGH SET GEN V REF + 6 LOW LIMIT 3 V REF LOW SET GEN R S Q Q 5 CONTROL* *Suffix code denotes cooling option (High true CONTROL output). Suffix code denotes heating option (Low true CONTROL output). DS20001439E-page 2 2001-2015 Microchip Technology Inc.