TC6501_13 Datasheet, PDF (1/16 Pages) Microchip Technology – Ultra Small Temperature Switches with Pin Selectable Hysteresis

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
T_OVER TC6502
HYST 3
4 V_CC
GND 1
GND 2
TC6503
TC6504
5 ^TUNDER ^TC6503
T_UNDER TC6504
HYST 3
4 V_CC
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
V_CC
TC6502
T_OVER
GND GNDHYST
V_CC
PIC^®
Microcontroller
INT
GND
Note: 5-Pin SOT-23A is equivalent to EIAJ SC-74A
 2002-2012 Microchip Technology Inc.
DS21451E-page 1