General Description
The MAX6694 precision multichannel temperature sen-
sor monitors its own temperature and the temperatures
of up to four external diode-connected transistors. All
temperature channels have programmable alert thresh-
olds. Channels 1 and 4 also have programmable
overtemperature thresholds. When the measured tem-
perature of a channel exceeds the respective thresh-
old, a status bit is set in one of the status registers. Two
open-drain outputs, OVERT and ALERT, assert corre-
sponding to these bits in the status register.
The 2-wire serial interface supports the standard system
management bus (SMBus") protocols: write byte, read
byte, send byte, and receive byte for reading the tem-
perature data and programming the alarm thresholds.
The MAX6694 is specified for a -40癈 to +125癈 oper-
ating temperature range and is available in 16-pin
TSSOP and 5mm x 5mm thin QFN packages.
Applications
Desktop Computers
Notebook Computers
Workstations
Servers
Features
o Four Thermal-Diode Inputs
o Beta Compensation (Channel 1)
o Local Temperature Sensor
o 1.5?/SPAN>C Remote Temperature Accuracy (+60?/SPAN>C to
+100癈)
o Temperature Monitoring Begins at POR for Fail-
Safe System Protection
o ALERT and OVERT Outputs for Interrupts,
Throttling, and Shutdown
o STBY Input for Hardware Standby Mode
o Small, 16-Pin TSSOP and TQFN Packages
o 2-Wire SMBus Interface
5-Channel Precision Temperature Monitor
with Beta Compensation
________________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxims website at www.maxim-ic.com.
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
GND
SMBCLK
SMBDATA
DXN2
DXP2
DXN1
DXP1
V
CC
N.C.
STBY
DXN4
DXP4
DXN3
DXP3
MAX6694
ALERT
OVERT
100pF
100pF
100pF
100pF
0.1礔
TO SYSTEM
SHUTDOWN
INTERRUPT
TO 礟
DATA
CLK
4.7k&
EACH
+3.3V
CPU
Typical Application Circuit
19-4097; Rev 0; 4/08
SMBus is a trademark of Intel Corp.
Pin Configurations appear at end of data sheet.
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX6694UE9A+
-40癈 to +125癈
16 TSSOP
MAX6694TE9A+
-40癈 to +125癈
16 TQFN-EP*
+Denotes a lead-free package.
*EP = Exposed pad.
Note: Slave address is 1001 101.
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