19-1712; Rev 1; 2/11
Dual Trip SOT Temperature Switches
–MAX6508
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.
♦
0.5°C (typ) Threshold Accuracy Over Full
Temperature Range
♦ No External Components Required
♦ Low Cost
♦ 30µA (typ) Supply Current
♦ Factory-Programmed Thresholds from -40°C to
+125°C in 5°C Increments
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
♦ Open-Drain Outputs (MAX6505/MAX6507),
Push-Pull Outputs (MAX6506/MAX6508)
♦ Pin Selectable 2°C, 10°C Hysteresis
(MAX6507/MAX6508)
thresholds (ΔT ) 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.
♦ Pin Selectable +5°C, +10°C, +20°C, +30°C
The MAX6507 has open-drain outputs (OVER, OK), and
the MAX6508 has push-pull outputs (OVER, OK), each
with two factory-programmed threshold temperatures
T
- T
(MAX6505/MAX6506)
ALARM
WARN
♦ SOT23 Package
(T
and T
) in the wide range of -40°C to
UNDER
OVER
+125°C. The overtemperature output asserts when the
temperature is above T . When the temperature is in
Ordering Information
OVER
PART
TEMP RANGE PIN-PACKAGE
-40°C to +125°C 6 SOT23
-40°C to +125°C 6 SOT23
-40°C to +125°C 6 SOT23
the desired window (less than T
and greater than
OVER
T ), OK (OK) asserts.
UNDER
MAX6505UT_ _ _ _+T
MAX6506UT_ _ _ _+T
MAX6507UT_ _ _ _+T
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.
MAX6508UT_ _ _ _+T -40°C to +125°C 6 SOT23
Note: 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 package with a +55°C threshold (Table 3). Contact
the factory for pricing and availability of temperature versions
(minimum order 10,000 pieces).
To complete the suffix information for MAX6507/MAX6508, see
Table 4.
+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
Selector Guide appears at end of data sheet.
Typical Operating Circuits appear at end of data sheet.
Pin Configurations
TOP VIEW
+
+
WARN
(WARN)
ALARM
(ALARM)
OK
(OK)
OVER
(OVER)
1
2
3
6
5
4
1
2
3
6
5
4
MAX6505
MAX6506
MAX6507
MAX6508
GND
S1
S0
GND
S0
N.C.
V
CC
V
CC
( ) ARE FOR MAX6506.
( ) ARE FOR MAX6508.
SOT23
SOT23
________________________________________________________________ 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.