Datasheet

________________General Description
The MAX6501–MAX6504 low-cost, fully integrated tem-
perature switches assert a logic signal when their die
temperature crosses a factory-programmed threshold.
Operating from a +2.7V to +5.5V supply, these devices
feature two on-chip, temperature-dependent voltage
references and a comparator. They are available with
factory-trimmed temperature trip thresholds from -45°C
to +125°C in 10°C increments, and are accurate to
±0.5°C (typ) or ±6°C (max). These devices require no
external components and typically consume 30µA sup-
ply current. Hysteresis is pin-selectable at 2°C or 10°C.
The MAX6501/MAX6503 have an active-low, open-drain
output intended to interface with a microprocessor (µP)
reset input. The MAX6502/MAX6504 have an active-
high, push-pull output intended to directly drive fan-
control logic. The MAX6501/MAX6502 are offered with
hot-temperature thresholds (+35°C to +125°C), assert-
ing when the temperature is above the threshold. The
MAX6503/MAX6504 are offered with cold-temperature
thresholds (-45°C to +15°C), asserting when the tem-
perature is below the threshold.
The MAX6501–MAX6504 are offered in eight standard
temperature versions; contact the factory for pricing
and availability of nonstandard temperature versions.
They are available in a 5-pin SOT23 package.
____________________________Features
♦♦
±0.5°C (typical) Threshold Accuracy Over
Full Temperature Range
♦♦
No External Components Required
♦♦
Low Cost
♦♦
30µA Supply Current
♦♦
Factory-Programmed Thresholds from
-45°C to +125°C in 10°C Increments
♦♦
Open-Drain Output (MAX6501/MAX6503)
Push-Pull Output (MAX6502/MAX6504)
♦♦
Pin-Selectable 2°C or 10°C Hysteresis
♦♦
SOT23-5 Package
MAX6501–MAX6504
Low-Cost, +2.7V to +5.5V, Micropower
Temperature Switches in SOT23
________________________________________________________________ Maxim Integrated Products 1
19-1280; Rev 6; 2/11
Ordering Information
Selector Guide and Pin Configurations appear at end of
data sheet.
MAX6502
+2.7V TO +5.5V
GND HYST
TOVER
μP
INT
GND GND
V
CC
V
CC
Typical Operating Circuit
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
PART TEMP RANGE PIN-PACKAGE
MAX6501UK_ _ _ _+T -55°C to +125°C 5 SOT23
MAX6502UK_ _ _ _+T -55°C to +125°C 5 SOT23
MAX6503UK_ _ _ _+T -55°C to +125°C 5 SOT23
MAX6504UK_ _ _ _+T -55°C to +125°C 5 SOT23
Note: These parts are offered in eight standard temperature
versions with a minimum order of 2,500 pieces. To complete
the suffix information, add P or N for positive or negative trip
temperature, and select an available trip point in degrees
centigrade. For example, the MAX6501UKP065+T describes a
MAX6501 in a SOT23 package with a +65°C threshold.
Contact the factory for pricing and availability of nonstandard
temperature versions (minimum order 10,000 pieces).
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel.
________________________Applications
µP Temperature Monitoring in High-Speed
Computers
Temperature Control
Temperature Alarms
Fan Control