July 1999 TOKO, Inc.
Page 1
TK11052
GND
OUTPUT1
OUTPUT2
NC
INPUT2
INPUT1
VCC
VREF
FEATURES
I
Internal Temperature Sensor, Voltage Reference
and Two Comparators with
I
Temperature Threshold and Hysteresis Set by Only
Two External Resistors
I
Output Logic:
Low to High with Increasing Temp. by OUTPUT1
High to Low with Increasing Temp. by OUTPUT2
I
Very Wide Operating Supply Range
(V
CC
= 2.7 to 6.0 V)
I
Miniature Package (SOT23L-8)
I
Minimum External Parts Count
I
Low Power Consumption
I
Very Wide Temperature Range
BLOCK DIAGRAM
TK11052
DESCRIPTION
The TK11052 is an accurate temperature controller IC for
use over the -30 to +105
°
C temperature range. The
TK11052 monolithic bipolar integrated circuit contains a
temperature sensor, stable voltage reference and two
comparators, making the device very useful as an on/off
thermostat. Two external resistors easily set the sensing
temperature threshold and hysteresis of each thermostat.
Its wide operating voltage range of 2.7 to 6.0 V makes this
IC suitable for a number of applications requiring an
accurate thermostat.
The TK11052 is available in a miniature SOT23L-8 surface
mount package.
01S
-
+
TESENSOR
TC = 6.1 mV/
°
C
ISINK1
RVOLTAGE
Vref = 1.597 V
IOUT
-
+
IIB2
ISH2
IIB1
ISH1
COMP2
COMP1
ISINK2
ORDERING INFORMATION
TAPE/REEL CODE
TL: Tape Left
Tape/Reel Code
TK11052MTL
THERMOSTAT IC
APPLICATIONS
I
Home and Industrial Thermostats
I
Home Appliance Temperature Control
I
Notebook Computer Temperature Monitor
I
Pentium Processor Temperature Monitor
I
Power Supply Overtemperature Protection
I
Copy Machine Overtemperature Protection
I
System Overtemperature Protection