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TC620CEPA Fiches technique(PDF) 1 Page - TelCom Semiconductor, Inc

No de pièce TC620CEPA
Description  5V, DUAL TRIP POINT TEMPERATURE SENSORS
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Fabricant  TELCOM [TelCom Semiconductor, Inc]
Site Internet  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC620CEPA Fiches technique(HTML) 1 Page - TelCom Semiconductor, Inc

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TELCOM SEMICONDUCTOR, INC.
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8
TC620
TC621
TC620/1-9 11/4/96
FUNCTIONAL BLOCK DIAGRAM
3
HIGH SET
2
LOW SET
5
CONTROL*
6
HIGH LIMIT
VDD
7
LOW LIMIT
8
4
*Suffix code "C" denotes cooling option (high true CONTROL output);
suffix code "H" denotes heating option (low true CONTROL output).
Q
S
R
Q
+
+
TC620
HIGH SET
LOW SET
1
THERMISTOR
CONTROL*
HIGH LIMIT
LOW LIMIT
Temp
to
Voltage
Converter
VREF
GEN
VREF
GEN
VREF
3
2
5
6
VDD
7
8
4
Q
S
R
Q
+
+
TC621
Thermistor
Interface
Circuit
VREF
GEN
VREF
GEN
VREF
Ambient
Part No.
Package
Temperature
TC621x*EOA
8-Pin SOIC
– 40
°C to +85°C
TC621x*EPA
8-Pin Plastic DIP
– 40
°C to +85°C
5V, DUAL TRIP POINT TEMPERATURE SENSORS
FEATURES
s
User-Programmable Hysteresis and Temperature
Set Point
s
Easily Programs with 2 External Resistors
s
Wide Temperature Detection
Range ................ – 40
°C to +125°C (TC620/621CVx)
s
External Thermistor for Remote Sensing
Applications (TC621x)
APPLICATIONS
s
Power Supply Overtemperature Detection
s
Consumer Equipment
s
Temperature Regulators
s
CPU Thermal Protection
ORDERING INFORMATION
Ambient
Part No.
Package
Temperature
TC620x*COA
8-Pin SOIC
0
°C to +70°C
TC620x*CPA
8-Pin Plastic DIP
0
°C to +70°C
TC620x*EOA
8-Pin SOIC
– 40
°C to +85°C
TC620x*EPA
8-Pin Plastic DIP
– 40
°C to +85°C
TC620CVOA
8-Pin SOIC
– 40
°C to +125°C
TC621x*COA
8-Pin SOIC
0
°C to +70°C
TC621x*CPA
8-Pin Plastic DIP
0
°C to +70°C
*The part code will be C or H (see Functional Block Diagram, below,
and page 2).
GENERAL DESCRIPTION
The TC620 and TC621 are programmable logic output
temperature detectors designed for use in thermal manage-
ment applications. The TC620 features an on-board tem-
perature 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 program 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) out-
put is driven high when temperature equals the high limit
setting, and returns low when temperature falls below the
low limit setting. This output can be used to provide simple
ON/OFF control to a cooling fan or heater. The TC621
provides the same output functions except that the logical
states are inverted.
The TC620/621 are usable over a maximum tempera-
ture range of – 40
°C to +125°C.


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