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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC6501 Datasheet

(TC6501 - TC6504) Ultra Small Temperature Switches with Pin Selectable Hysteresis

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M
TC6501/2/3/4
Ultra Small Temperature Switches
with Pin Selectable Hysteresis
Features
• 5-Pin SOT-23A
• Factory-programmed Thresholds from
-45°C to +125°C in 10°C Increments
• Pin Selectable +2°C or +10°C Hysteresis
• ±0.5°C (Typ) Threshold Accuracy Over Full
Temperature Range
• No External Components Required
• 17 µA Supply Current (Typ)
Applications
• Thermal Management in PCs and Servers
• Over-temperature Fail-safe Circuits
• Simple Fan Controller
• Temperature Alarms
• Projectors/Printers
• Notebook Computers
• Network Boxes
Package Types
GND 1
GND 2
TC6501
TC6502
5 TOVER TC6501
TOVER TC6502
HYST 3
4 VCC
GND 1
GND 2
TC6503
TC6504
5 TUNDER TC6503
TUNDER TC6504
HYST 3
4 VCC
General Description
The TC6501/2/3/4 are SOT-23 temperature switches
that require no external components and are available
with factory-programmed temperature thresholds. A
choice of factory-trimmed temperature trip points are
also available. Pin-selectable hysteresis of +2°C or
+10°C allows flexibility to the design of the application.
These parts typically consume only 17 µA of current
and operate over the entire -55°C to +135°C
temperature range, while offering accuracies of ±0.5°C
(typ).
The TC6501 and TC6503 have an open-drain, active-
low output, which targets microcontroller reset control.
The TC6502 and TC6504 have a CMOS, active-high
output designed to drive the logic level MOSFET that
turns on a fan or heater element.
The TC6501/TC6502 are designed for hot temperature
monitoring (+35°C to +125°C). These devices assert a
logic signal when the temperature goes above the
threshold. The TC6503/TC6504 are optimized for cold
temperature monitoring (-45°C to +15°C) and assert a
logic signal when the temperature goes below the
threshold.
The TC6501/2/3/4 are offered with five standard tem-
perature thresholds. Available in 5-Pin SOT-23A pack-
ages, these parts are ideal for applications requiring
high integration, small size, low power and low installed
cost.
Functional Block Diagram
+2.7V to +5.5V
100 pF
VCC
TC6502
TOVER
GND GNDHYST
VCC
PICmicro®
Microcontroller
INT
GND
Note: 5-Pin SOT-23A is equivalent to EIAJ SC-74A
2004 Microchip Technology Inc.
DS21451D-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC6501 Datasheet

(TC6501 - TC6504) Ultra Small Temperature Switches with Pin Selectable Hysteresis

No Preview Available !

TC6501/2/3/4
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Supply Voltage (VCC) .............................. -0.3V to +7V
Input Current (All Pins).......................................20 mA
Output Current (All Pins) ....................................20 mA
Operating Temperature Range.......... - 55°C to +135°C
Storage Temperature Range ............. - 65°C to +165°C
TOVER (TC6501)....................................... -0.3V to +7V
TOVER (TC6502)......................... -0.3V to (VCC + 0.3V)
TUNDER (TC6503)....................................... -0.3V to 7V
TUNDER (TC6504)....................... -0.3V to (VCC + 0.3V)
All Other Pins ............................. -0.3V to (VCC + 0.3V)
Maximum Junction Temperature, TJ .................. 150°C
Power Dissipation (TA = +70°C):
(Derate 7.1 mW/°C Above +70°C) ...............570 mW
* Notice: Stresses above those listed under “Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only and functional operation of
the device at these or any other conditions above those
indicated in the operational sections of the specifica-
tions is not implied. Exposure to maximum rating con-
ditions for extended periods may affect device
reliability.
ELECTRICAL SPECIFICATIONS
Electrical Characteristics: Unless otherwise noted, VCC = +2.7V to +5.5V, RPULL-UP = 100 k(TC6501/TC6503 only), 100 pF
decoupling capacitor from VCC to GND, TAMB = -55°C to +135°C. Typical values are at TA = +25°C.
Parameter
Symbol Min Typ Max Unit
Test Conditions
Supply Voltage Range
Supply Current
HYST Input Threshold
HYST Input Threshold
Temperature Threshold Accuracy (Note 1)
VCC
ICC
VIH
VIL
TTH
2.7
0.8 x VCC
-6
-4
17
±0.5
±0.5
5.5
40
0.2 x VCC
6
4
V
µA
V
V
°C -45°C to -25°C
°C -15°C to +15°C
-4 ±0.5 4 °C +35°C to +65°C
-6 ±0.5 6 °C +75°C to +125°C
Temperature Threshold Hysteresis
Output Voltage High
THYST
VOH
0.8 x VCC
2.0
10
— °C HYST = GND
— °C HYST = VCC
— V ISOURCE = 500 µA, VCC > 2.7V
(TC6502/TC6504 Only)
VCC - 1.5
— V ISOURCE = 800 µA, VCC > 4.5V
(TC6502/TC6504 Only)
Output Voltage Low
Open-Drain Output Leakage Current
VOL
0.3 V ISINK = 1.2 mA, VCC > 2.7V
——
0.4 V ISINK = 3.2 mA, VCC > 4.5V
— 10
— nA VCC = 2.7V, TUNDER = 5.5V
(TC6503); TOVER = 5.5V
(TC6501)
Note 1: The TC6501/2/3/4 are available with internal, factory-programmed temperature trip thresholds from -45°C to +125°C, in
+10°C increments.
DS21451D-page 2
2004 Microchip Technology Inc.


Part Number TC6501
Description (TC6501 - TC6504) Ultra Small Temperature Switches with Pin Selectable Hysteresis
Maker Microchip Technology
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TC6501 Datasheet PDF





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