LOW COST, SINGLE TRIP POINT
TEMPERATURE SENSOR
TC622
TC624
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage (TC622) .............................................20V
(TC624) ........................................... 5.5V
Input Voltage Any Input ....... (GND – 0.3V) to (V
DD
+0.3V)
Operating Temperature ......................... – 40°C to +125°C
C Version ............................................... 0°C to +70°C
E Version .......................................... – 40°C to +85°C
V Version ........................................ – 40°C to +125°C
Maximum Junction Temperature ........................... +150°C
Storage Temperature ............................ – 65°C to +150°C
Lead Temperature (Soldering, 10 sec) ................. +300°C
*Stresses above those listed under "Absolute Maximum Ratings" may
cause permanent 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
(Over Operating Temperature Range, unless otherwise specified.)
Parameter
Supply Voltage Range
Supply Current
V
OH
TC622
TC624
TC622
TC624
TC622
Conditions
Min
4.5
2.7
—
—
0.90 x V
DD
0.80 x V
DD
—
—
—
Typ
—
200
170
—
—
—
—
—
—
—
—
—
—
T
±
1
T
±
1
2
2
Max
18
4.5
600
300
—
—
0.15 x V
DD
0.30 x V
DD
0.35 x V
DD
—
—
0.1 x V
DD
0.2 x V
DD
0.25 x V
DD
T+5
T+5
—
—
Unit
V
µA
V
OL
TC622
V
OH
TC624
V
OL
TC624
Absolute Accuracy
Trip Point Hysteresis
TC622
TC624
TC622
TC624
5.0V
≤
V
DD
≤
18V
2.7V
≤
V
DD
≤
4.5V
5.0V
≤
V
DD
≤
18V,
– 40°C
≤
T
A
≤
+125°C, I
OH
= 250µA
I
OH
= 500µA
– 40°C
≤
T
A
≤
+85°C, I
OL
= 500µA
I
OL
= 1mA
– 40°C
≤
T
A
≤
+125°C, I
OL
= 1mA
2.7V
≤
V
DD
≤
4.5V,
– 40°C
≤
T
A
≤
+125°C, I
OH
= 250µA
I
OH
= 500µA
– 40°C
≤
T
A
≤
+85°C, I
OL
= 500µA
I
OL
= 1mA
– 40°C
≤
T
A
≤
+125°C, I
OL
= 1mA
T
SET
= Programmed Temperature
T
SET
= Programmed Temperature
V
V
0.9 x V
DD
0.8 x V
DD
—
—
V
V
—
T–5
T–5
—
—
°C
°C
DETAILED DESCRIPTION
The TC622 and TC624 are single point temperature
detectors ideal for use in a wide variety of applications.
When the temperature of the device exceeds the pro-
grammed temperature trip point, T
SET
, the OUT and OUT
outputs are driven into their active states. The desired trip-
point temperature is programmed with a single external
resistor connected between the T
SET
input and V
CC
. The
relationship between the resistor value and the trip point
temperature is given by the equation below.
R
TRIP
= 0.5997 x T
2.1312
Where Rtrip = Programming resistor value in Ohms
T = Desired trip temperature in degrees Kelvin.
2-22
For example, to program the device to trip at 50°C,
the programming resistor is:
R
TRIP
= 0.5997 x ((50 + 273.15)
2.1312
) = 133,652
Ω
TELCOM SEMICONDUCTOR, INC.
TELCOM [ TELCOM SEMICONDUCTOR, INC ]
