19-1712; Rev 1; 4/00
Dual Trip SOT Temperature Switches
General Description
Features
The MAX6505–MAX6508 temperature switches have dual
logic outputs that assert when the die temperature cross-
es their trip thresholds. Trip thresholds are factory pro-
grammed to convenient temperatures in 5°C increments.
o ±±0.5°C (typCꢀThreTꢁolCꢂAAchꢃAtCꢄOrhCꢅcoo
ꢀrmyrhꢃ(chrCRꢃngr
o NꢁCEx(rhnꢃoC°ꢁmyꢁnrn(eCRrqcihrl
o LꢁwC°ꢁe(
The MAX6505/MAX6506 have an ALARM output that
asserts when the temperature is above the factory-pro-
grammed thresholds (available from -40°C to +125°C).
They also have a WARN output that asserts when the
temperature is several degrees below the ALARM thresh-
old. The difference between the ALARM and WARN
o 3±µꢂC (typCScyyotC°chhrn(
o ꢅꢃA(ꢁht-PhꢁghꢃmmrlCꢀThreTꢁoleCfhꢁmC-4±5°C(ꢁ
+12.5°CinC.5°CInAhrmrn(eC
o ꢄyrn-DhꢃinCꢄc(yc(eC MꢂX6.±./MꢂX6.±7p,
PceT-PcooCꢄc(yc(eC MꢂX6.±6/MꢂX6.±8p
o PinCSrorA(ꢃborC+25°,C+1±5°CHte(rhreie
MꢂX6.±7/MꢂX6.±8p
thresholds (∆T ) is pin selectable to +5°C, +10°C,
AW
+20°C, or +30°C. The MAX6505’s logic outputs are open
drain, while the MAX6506’s logic outputs are push-pull.
o PinCSrorA(ꢃborC+.5°,C+1±5°,C+2±5°,C+3±5°
The MAX6507 has open-drain outputs (OVER, OK), and
the MAX6508 has push-pull outputs (OVER, OK), each
with two factory-programmed threshold temperatures
(TOVER and TUNDER) in the wide range of -40°C to
+125°C. The overtemperature output asserts when the
temperature is above TOVER. When the temperature is in
the desired window (less than TOVER and greater than
TUNDER), OK (OK) asserts.
ꢀ
-Cꢀ
MꢂX6.±./MꢂX6.±6p
ꢂLꢂRMC WꢂRN
o Sꢄꢀ23-6CPꢃAkꢃgrC
Ordering Information
PIN-
PACKAGE
TEMP. RANGE
PART
MAX6505UT_ _ _ _-T*
MAX6506UT_ _ _ _-T*
MAX6507UT_ _ _ _-T**
MAX6508UT_ _ _ _-T**
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
6 SOT23-6
6 SOT23-6
6 SOT23-6
6 SOT23-6
The MAX6505–MAX6508 are accurate to 0.5°C (typ),
5.5°C (max). Operating from a +2.5V to +5.5V supply,
these low-cost devices typically consume 30µA supply
current and require no external components for setting
trip points. The MAX6505–MAX6508 are available in a 6-
pin SOT23 package.
*To complete the suffix information for the MAX6505/
MAX6506, add P or N for positive or negative trip tempera-
ture, and select an available trip point in degrees centigrade.
For example, the MAX6505UTP055-T describes a MAX6505 in
a SOT23-6 package with a +55°C threshold (Table 3). Contact
the factory for pricing and availability of temperature versions
(minimum order 10,000 pieces).
________________________Applications
µP Temperature Monitoring in High-Speed
Computers
Temperature Control
Temperature Alarms
Fan Control
**To complete the suffix information for MAX6507/MAX6508,
see Table 4.
Selector Guide appears at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
Pin Configurations
TOP VIEW
WARN
ALARM
OK
OVER
1
2
3
6
5
4
1
2
3
6
5
4
(WARN)
(ALARM)
(OK)
(OVER)
MAX6505
MAX6506
MAX6507
MAX6508
GND
S1
S0
GND
S0
N.C.
V
V
CC
CC
( ) ARE FOR MAX6506.
( ) ARE FOR MAX6508.
SOT23-6
SOT23-6
________________________________________________________________ Maxim Integrated Products
1
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