TelCom Semiconductor Inc TC07VUA, TC07VOA, TC07EUA, TC07EOA, TC07CUA Datasheet
...
3V LOGIC OUTPUT TEMPERA TURE SENSOR WITH
PROGRAMMABLE HYSTERESIS
1
TC07
2
FEATURES
■ User Programmable Hysteresis and Temperature
Set Point
■ Easily Programs with Two External Resistors
■ Wide Temperature Detection Range
TC07CxA ....................................... 0°C to +70°C
TC07ExA ................................ – 40°C to +85°C
TC07VxA ............................... – 40°C to +125°C
■ Small 8-Pin MSOP and 8-Pin SOIC Packages
■ Cost Effective
APPLICATIONS
■ Power Supply Over-Temperature Detection
■ Consumer Equipment
■ Temperature Regulators
■ Computer Equipment
ORDERING INFORMATION
Part No. Package Temp. Range
TC07COA 8-Pin SOIC 0°C to +70°C
TC07CUA 8-Pin MSOP 0°C to +70°C
TC07EOA 8-Pin SOIC – 40°C to +85°C
TC07EUA 8-Pin MSOP – 40°C to +85°C
TC07VOA 8-Pin SOIC – 40°C to +125°C
TC07VUA 8-Pin MSOP – 40°C to +125°C
FUNCTIONAL BLOCK DIAGRAM
TEMP
SENSOR
TEMPERATURE
TO VOLTAGE
CONVERTER
+
–
–
+
S Q
R Q
OUT
OUT
GENERAL DESCRIPTION
The TC07 is a programmable, logic output temperature
detector that operates from power supply levels as low as
2.7V. Programming is accomplished with external resistors
connected from the temperature setpoint input (T
the hysteresis control input (H
Complimentary outputs (OUT and OUT) are driven
active when temperature exceeds the temperature threshold programmed by the resistor on T
outputs are maintained (latched) until temperature falls
below threshold programmed by the resistor on H
The TC07 is useful over a maximum temperature range
of – 40°C to +125°C (TC07VxA). It features low (<130µA)
supply current and small physical size 8-pin MSOP and
8-pin SOIC packages, making it suitable for a wide variety
of applications.
PIN CONFIGURATION
8-Pin SOIC
18
27
36
45
NC
H
SET
T
SET
GND
TC07COA
TC07EOA
TC07VOA
8-Pin MSOP
1
2
TC07CUA
3
TC07EUA
4
TC07VUA
H
SET
T
SET
GND
NC
) to VDD.
SET
. The states of these
SET
V
DD
NC
OUT
OUT
8
V
DD
7
NC
6
OUT
5
OUT
SET
SET
) and
.
3
4
5
6
7
VOLTAGE
REFERENCE
GENERATOR
T
TELCOM SEMICONDUCTOR, INC.
SET
H
SET
V
DD
GND
8
TC07-1 9/18/96
2-11
TC07
3V LOGIC OUTPUT TEMPERA TURE
SENSOR WITH PROGRAMMABLE
HYSTERESIS
ABSOLUTE MAXIMUM RATINGS*
Supply Voltage ..............................................................7V
Input Voltage Any Input...... (GND – 0.3V) to (VDD + 0.3V)
Operating Temperature.........................– 40°C to +125°C
Maximum Chip Temperature.................................+150°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.
Storage Temperature ............................– 65°C to +150°C
Lead Temperature (Soldering, 10 sec) ................. +300°C
ELECTRICAL CHARACTERISTICS: T
= Over Operational Temperature Range, unless otherwise specified.
A
Symbol Parameter Conditions Min Typ Max Unit
V
DD
I
DD
V
OH
VOLOutput Voltage (Low) I
H Minimum Hysteresis H
T
SET
H
SET
DETAILED DESCRIPTION
Supply Voltage Range 2.7 — 5.5 V
Supply Current 2.7V < VCC < 5.5V — 130 300 µA
Output Voltage (High) I
= 500µA 0.8 x V
OUT
= 1mA — — 0.25 x V
OUT
< T
SET
SET
DD
– 5 — — °C
——V
DD
V
Absolute Accuracy T = Programmed Temperature T – 3 T ± 1 T + 3 °C
Absolute Accuracy T = Programmed Temperature T – 5 T ± 1 T + 5 °C
APPLICATIONS
The TC07 programs with resistors connected from the
T
SET
and H
inputs to VDD. Output pins OUT and OUT are
SET
driven active when temperature exceeds the setting determined by the programming resistor on T
. The outputs are
SET
maintained (latched) in their active states until temperature
drops below the setting determined by the programming
resistor on H
TEMPERATURE SET BY
RESISTOR ON T
HYSTERESIS SET BY
RESISTOR ON H
(Figure 1).
SET
SET
SET
OUT
OUT
Figure 1. TC07 Output Waveforms
TEMPERATURE
Trip Point Programming
The resistor values required to achieve the desired
trip-point temperatures on T
using the formula below:
R
= 0.6 x T
TRIP
2.13
Where:
R
= Programming resistor value in Ohms
TRIP
T = Desired trip point temperature in degrees
Kelvin.
For example, to program the TC07 outputs to go active
at 50°C and inactive at 30°C, the T
ming resistors are calculated as follows:
T
= 0.6 x ((50 + 273.15)
SET
H
= 0.6 x ((30 + 273.15)
SET
Resistance values for T
mated using Figure 2. Care must be taken to ensure the
H
programming resistor is a smaller value than the T
SET
programming resistor. The temperature programmed on
H
must be at least 5°C lower than the temperature value
SET
programmed by T
. That is: H
SET
SET
SET
2.13
2.13
and H
and H
SET
SET
and H
) = 132.8kΩ
) = 115.9kΩ
SET
≤ T
SET
are calculated
program-
SET
can be approxi-
– 5°C.
SET
SET
2-12
TELCOM SEMICONDUCTOR, INC.
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