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TC620 Datasheet Preview

TC620 Datasheet

(TC620 / TC621) DUAL TRIP POINT TEMPERATURE SENSORS

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1
TC620
TC621
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
Part No.
TC620x*COA
TC620x*CPA
TC620x*EOA
TC620x*EPA
TC620CVOA
TC621x*COA
TC621x*CPA
Package
Ambient
Temperature
8-Pin SOIC
0°C to +70°C
8-Pin Plastic DIP
0°C to +70°C
8-Pin SOIC
– 40°C to +85°C
8-Pin Plastic DIP – 40°C to +85°C
8-Pin SOIC
– 40°C to +125°C
8-Pin SOIC
0°C to +70°C
8-Pin Plastic DIP
0°C to +70°C
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.
Part No.
Package
Ambient
Temperature
TC621x*EOA
TC621x*EPA
8-Pin SOIC
– 40°C to +85°C
8-Pin Plastic DIP – 40°C to +85°C
*The part code will be C or H (see Functional Block Diagram, below,
and page 2).
2
3
4
5
FUNCTIONAL BLOCK DIAGRAM
Temp
to
Voltage
Converter
2
LOW SET
VREF
GEN
TC620
+
VDD
8
4
7
LOW LIMIT
1
THERMISTOR
Thermistor
Interface
Circuit
2
HIGH SET
VREF
GEN
3
HIGH SET
VREF
VREF
GEN
+6
HIGH LIMIT
RS
QQ
5
CONTROL*
3
LOW SET
VREF
VREF
GEN
*Suffix code "C" denotes cooling option (high true CONTROL output);
suffix code "H" denotes heating option (low true CONTROL output).
TELCOM SEMICONDUCTOR, INC.
TC621
VDD
8
4
6
+
7
HIGH LIMIT
7
+6
LOW LIMIT
RS
QQ
5
CONTROL*
8
TC620/1-9 11/4/96
2-15




TelCom Semiconductor

TC620 Datasheet Preview

TC620 Datasheet

(TC620 / TC621) DUAL TRIP POINT TEMPERATURE SENSORS

No Preview Available !

5V, DUAL TRIP POINT
TEMPERATURE SENSORS
TC620
TC621
ABSOLUTE MAXIMUM RATINGS*
Package Power Dissipation (TA 70°C)
PDIP ............................................................... 730mW
SOIC ............................................................... 470mW
Derating Factors
Plastic ............................................................8mW/°C
Supply Voltage ............................................................20V
Input Voltage Any Input ....... (GND – 0.3V) to (VDD +0.3V)
Operating Temperature
M Version ....................................... – 55°C to +125°C
V Version ........................................ – 40°C to +125°C
E Version .......................................... – 40°C to +85°C
C Version ............................................... 0°C to +70°C
Maximum Chip Temperature ................................. +150°C
Storage Temperature ............................ – 65°C to +150°C
Lead Temperature (Soldering, 10 sec) ................. +300°C
*Static-sensitive device. Unused devices must be stored in conductive
material. Protect devices from static discharge and static fields. Stresses
above those listed under "Absolute Maximum Ratings" may cause perma-
nent 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.
Exposure to absolute maximum rating conditions for extended periods may
affect device reliability.
ELECTRICAL CHARACTERISTICS: TA = 25°C, unless otherwise specified.
Parameter
Supply Voltage Range
Supply Current
Output Resistance
Output Current
Output Current
Absolute Accuracy
Conditions
5V VDD 18V
Output High or Low, 5V VDD 18V
Temp Sensed Source/Sink
Cool/Heat
Source/Sink
T = Programmed Temperature
Min
4.5
T–3
Typ
270
400
T
Max
18
400
1000
1
1
T+3
Unit
V
µA
mA
mA
°C
PIN CONFIGURATIONS (DIP and SOIC)
NC 1
LOW SET 2
HIGH SET 3
GND 4
TC620xCPA
TC620xEPA
8 VDD
7 LOW LIMIT
6 HIGH LIMIT
5 CONTROL
NC 1
8 VDD
LOW SET 2
7 LOW LIMIT
HIGH SET
3
TC620xCOA
TC620xEOA
6
HIGH LIMIT
GND 4 TC620CVOA 5 CONTROL
NC 1
HIGH SET 2
LOW SET 3
GND 4
TC621xCPA
TC621xEPA
8 VDD
7 HIGH LIMIT
6 LOW LIMIT
5 CONTROL
NC
HIGH SET
LOW SET
GND
1
2
3
4
8 VDD
7 HIGH LIMIT
TC621xCOA 6 LOW LIMIT
TC621xEOA
5 CONTROL
2-16 TELCOM SEMICONDUCTOR, INC.


Part Number TC620
Description (TC620 / TC621) DUAL TRIP POINT TEMPERATURE SENSORS
Maker TelCom Semiconductor
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