19-1280; Rev 6; 2/11
Low-Cost, +2.7V to +5.5V, Micropower
Temperature Switches in SOT23
1–MAX6504
________________General Description
____________________________Features
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 ꢀtypꢁ or 6°C ꢀmaꢂꢁ. These devices reꢃuire no
eꢂternal components and typically consume 30µA sup-
ply current. Hysteresis is pin-selectable at 2°C or 10°C.
♦ ±±0.5°C (typicalCꢀThreTꢁaꢂCꢃiiꢄhcitCꢅOrh
FꢄaaCꢀrmyrhc(ꢄhrCRcngr
♦ NꢁCEx(rhncaC°ꢁmyꢁnrn(eCRrqꢄphrꢂ
♦ LꢁwC°ꢁe(
♦ 3±µꢃCSꢄyyatC°ꢄhhrn(
♦ Fci(ꢁht-PhꢁghcmmrꢂCꢀThreTꢁaꢂeCfhꢁm
-4.5°C(ꢁC+12.5°CpnC1±5°CInihrmrn(e
♦ ꢅyrn-DhcpnCꢅꢄ(yꢄ(C MꢃX6.±1/MꢃX6.±3l
PꢄeT-PꢄaaCꢅꢄ(yꢄ(C MꢃX6.±2/MꢃX6.±4l
The MAX6501/MAX6503 have an active-low, open-drain
output intended to interface with a microprocessor ꢀµPꢁ
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°Cꢁ, assert-
ing when the temperature is above the threshold. The
MAX6503/MAX6504 are offered with cold-temperature
thresholds ꢀ-45°C to +15°Cꢁ, asserting when the tem-
perature is below the threshold.
♦ Ppn-Srari(cbarC25°CꢁhC1±5°CHte(rhrepe
♦ Sꢅꢀ23-.CPcikcgr
Ordering Information
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
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.
Note: These parts are offered in eight standard temperature
versions with a minimum order of 2,500 pieces. To complete
the suffiꢂ information, add P or N for positive or negative trip
temperature, and select an available trip point in degrees
centigrade. For eꢂample, 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 piecesꢁ.
+Denotes a leadꢀPbꢁ-free/RoHS-compliant package.
T = Tape and reel.
Typical Operating Circuit
+2.7V TO +5.5V
V
CC
V
CC
________________________Applications
MAX6502
TOVER
µP Temperature Monitoring in High-Speed
Computers
μP
INT
Temperature Control
Temperature Alarms
Fan Control
GND GND HYST
GND
Selector Guide and Pin Configurations appear at end of
data sheet.
________________________________________________________________ Maxim Integrated Products
1
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.