M
Features
鈥?5-Pin SOT-23A
鈥?Factory-programmed Thresholds from
-45擄C to +125擄C in 10擄C Increments
鈥?Pin Selectable +2擄C or +10擄C Hysteresis
鈥?鹵0.5擄C (Typ) Threshold Accuracy Over Full
Temperature Range
鈥?No External Components Required
鈥?17 碌A(chǔ) Supply Current (Typ)
TC6501/2/3/4
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擄C or
+10擄C allows flexibility to the design of the application.
These parts typically consume only 17 碌A(chǔ) of current
and operate over the entire -55擄C to +135擄C
temperature range, while offering accuracies of 鹵0.5擄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擄C to +125擄C). These devices assert a
logic signal when the temperature goes above the
threshold. The TC6503/TC6504 are optimized for cold
temperature monitoring (-45擄C to +15擄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.
Ultra Small Temperature Switches
with Pin Selectable Hysteresis
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Thermal Management in PCs and Servers
Over-temperature Fail-safe Circuits
Simple Fan Controller
Temperature Alarms
Projectors/Printers
Notebook Computers
Network Boxes
Package Types
T
OVER
TC6501
T
OVER
TC6502
GND 1
GND 2
TC6501
TC6502
5
Functional Block Diagram
HYST 3
4 V
CC
100 pF
GND 1
GND 2
TC6503
TC6504
5
T
UNDER
TC6503
T
UNDER
TC6504
V
CC
V
CC
+2.7V to +5.5V
TC6502
T
OVER
GND GNDHYST
PICmicro
廬
Microcontroller
INT
GND
HYST 3
4 V
CC
Note:
5-Pin SOT-23A is equivalent to EIAJ SC-74A
錚?/div>
2004 Microchip Technology Inc.
DS21451D-page 1
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