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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC621 Datasheet

(TC620 / TC621) Dual Trip Point Temperature Sensors

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TC620/TC621
5V, Dual Trip Point Temperature Sensors
Features
• User Programmable Hysteresis and
Temperature Set Point
• Easily Programs with Two External Resistors
• Wide Temperature Detection Range:
- 0°C to 70°C: (TC620/TC621CCX)
- -40°C to +125°C: (TC620/TC621CVX)
- -40°C to +85°C: (TC620/TC621CEX)
• Onboard Temperature Sensing Applications
(TC620X)
• External NTC Thermistor for Remote Sensing
Applications (TC621X)
• Available in 8-Pin PDIP and SOIC Packages
Applications
• Power Supply Over Temperature Detection
• Consumer Equipment
• Temperature Regulators
• CPU Thermal Protection
Device Selection Table
Part Number
Package
Temperature
Range
TC620X*COA
TC620X*CPA
TC620X*EOA
TC620X*EPA
8-Pin SOIC
8-Pin PDIP
8-Pin SOIC
8-Pin PDIP
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
TC620C*VOA
TC621X*COA
TC621X*CPA
TC621X*EOA
TC621X*EPA
TC621C*VOA
8-Pin SOIC
8-Pin SOIC
8-Pin PDIP
8-Pin SOIC
8-Pin PDIP
8-Pin SOIC
-40°C to +125°C
0°C to +70°C
0°C to +70°C
-40°C to +85°C
-40°C to +85°C
-40°C to +125°C
Note: *The part code will be C or H (see
Functional Block Diagrams).
Package Type
8-PDIP
NC 1
LOW SET 2 TC620XCPA
HIGH SET 3 TC620XEPA
GND 4
8 VDD
7 HIGH LIMIT
6 LOW LIMIT
5 CONTROL
8-PDIP
THERMISTOR 1
HIGH SET 2
LOW SET 3
GND 4
TC621XCPA
TC621XEPA
8 VDD
7 HIGH LIMIT
6 LOW LIMIT
5 CONTROL
8-SOIC
NC 1
LOW SET 2
HIGH SET 3
GND 4
8 VDD
TC620XCOA 7 LOW LIMIT
TC620XEOA 6 HIGH LIMIT
TC620CVOA 5 CONTROL
8-SOIC
THERMISTOR 1
HIGH SET 2
LOW SET 3
GND 4
8 VDD
TC621XCOA 7 HIGH LIMIT
TC621XEOA 6 LOW LIMIT
5 CONTROL
General Description
The TC620 and TC621 are programmable logic output
temperature detectors designed for use in thermal
management applications. The TC620 features an
onboard temperature sensor, while the TC621
connects to an external NTC thermistor for remote
sensing applications.
Both devices feature dual thermal interrupt outputs
(HIGH LIMIT and LOW LIMIT), each of which is pro-
grammed with a single external resistor. On the TC620,
these outputs are driven active (high) when measured
temperature equals the user programmed limits. The
CONTROL (hysteresis) output is driven high when tem-
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 0°C to 70°C, -40°C to +125°C.
2001-2015 Microchip Technology Inc.
DS20001439E-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC621 Datasheet

(TC620 / TC621) Dual Trip Point Temperature Sensors

No Preview Available !

TC620/TC621
Functional Block Diagrams
Temp. to
Voltage
Converter
2
LOW SET
3
HIGH SET
VREF
GEN
VREF
VREF
GEN
TC620
+
VDD
8
4
7
LOW LIMIT
+6
HIGH LIMIT
RS
QQ
5
CONTROL*
THERMISTOR
1
Thermistor
Interface
Circuit
2
HIGH SET
LOW SET 3
VREF
GEN
VREF
VREF
GEN
TC621
+
VDD
8
4
7
HIGH LIMIT
+6
LOW LIMIT
RS
QQ
5
CONTROL*
*Suffix code "C" denotes cooling option (High true CONTROL output).
Suffix code "H" denotes heating option (Low true CONTROL output).
DS20001439E-page 2
2001-2015 Microchip Technology Inc.


Part Number TC621
Description (TC620 / TC621) Dual Trip Point Temperature Sensors
Maker Microchip Technology
PDF Download

TC621 Datasheet PDF






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