MAX6625/MAX6626
9-Bit/12-Bit Temperature Sensors with
I
2
C-Compatible Serial Interface in a SOT23
19-1841; Rev 5; 11/12
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com.
General Description
The MAX6625/MAX6626 combine a temperature sensor,
a programmable overtemperature alarm, and an I
2
C-
compatible serial interface into single compact packages.
They convert their die temperatures into digital values
using internal analog-to-digital converters (ADCs). The
result of the conversion is held in a temperature register,
readable at any time through the serial interface. A dedi-
cated alarm output, OT, activates if the conversion result
exceeds the value programmed in the high-temperature
register. A programmable fault queue sets the number of
faults that must occur before the alarm activates, prevent-
ing spurious alarms in noisy environments. OT has pro-
grammable output polarity and operating modes.
The MAX6625/MAX6626 feature a shutdown mode that
saves power by turning off everything but the power-on
reset and the I
2
C-compatible interface. Four separate
addresses can be configured with the ADD pin, allowing
up to four MAX6625/MAX6626 devices to be placed on
the same bus. The MAX6625P/MAX6626P OT outputs are
open drain, and the MAX6625R/MAX6626R OT outputs
include internal pullup resistors.
The MAX6625 has a 9-bit internal ADC and can function
as a replacement for the LM75 in most applications. The
MAX6626 has a 12-bit internal ADC. Both devices come
in the space-saving 6-pin SOT23 package, or the 6-pin
TDFN package.
Applications
Fan Control
Temperature Alarms
System Temperature Control
Industrial Equipment
Features
o 9-Bit Temperature-to-Digital Converter (MAX6625)
o 12-Bit Temperature-to-Digital Converter (MAX6626)
o I
2
C-Compatible Serial Interface
o Up to Four Devices on a Single Bus
o Versatile Alarm Output with Programmable Trip
Temperature and Hysteresis
o Low-Power Shutdown Mode
o Space-Saving TDFN or SOT23 Packages
o Lead-Free Version Available (TDFN Package)
GND
OT
**EP = EXPOSED PAD
SCL
1
+
6   V
S
5   ADD
SDA
MAX6625
MAX6626
SOT236
TDFN-EP**
TOP VIEW
2
3
4
Pin Configuration
4
6
V
S
.1礔
1
MAX6625
MAX6626
3
SCL
TO I
2
C
MASTER
10k&
(OMIT FOR MAX6625R
AND MAX6626R)
SDA
5
2
1k& 1k&
OT OUTPUT
Typical Operating Circuit
Note: All devices operate over the -55?/SPAN>C to +125?/SPAN>C temperature
range.
*For device options, see Selector Guide at end of data sheet.
Requires special solder temperature profile described in the
Absolute Maximum Ratings section.
**EP = Exposed pad.
PART
PIN-PACKAGE
PKG CODE
MAX6625PMUT*
6 SOT23
U6F-6
MAX6625RMUT*
6 SOT23
U6F-6
MAX6625PMTT*
6 TDFN-EP**
T633-1
MAX6625RMTT*
6 TDFN-EP**
T633-1
MAX6626PMUT*
6 SOT23
U6F-6
MAX6626RMUT*
6 SOT23
U6F-6
MAX6626PMTT*
6 TDFN-EP**
T633-1
MAX6626RMTT*
6 TDFN-EP**
T633-1
Ordering Information