MAX6694 Datasheet, PDF (1/18 Pages) Maxim Integrated Products – 5-Channel Precision Temperature Monitor with Beta Compensation

19-4097; Rev 0; 4/08
5-Channel Precision Temperature Monitor
with Beta Compensation
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°C to +125°C 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
SMBus is a trademark of Intel Corp.
Pin Configurations appear at end of data sheet.
Features
o Four Thermal-Diode Inputs
o Beta Compensation (Channel 1)
o Local Temperature Sensor
o 1.5°C Remote Temperature Accuracy (+60°C to
+100°C)
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
Ordering Information
PART
TEMP RANGE
MAX6694UE9A+ -40°C to +125°C
MAX6694TE9A+ -40°C to +125°C
+Denotes a lead-free package.
*EP = Exposed pad.
Note: Slave address is 1001 101.
PIN-PACKAGE
16 TSSOP
16 TQFN-EP*
Typical Application Circuit
CPU
100pF
1 _DXP1
2 _DXN1
GND ¹⁶
SMBCLK ¹⁵
100pF
3 _DXP2
4 _DXN2
MAX6694 _SMBDATA 14
ALERT ¹³
100pF
5 _DXP3
6 _DXN3
V_CC ¹²
OVERT ¹¹
100pF
7 _DXP4
8 _DXN4
N.C. ¹⁰
STBY ⁹
+3.3V
4.7kΩ
EACH
CLK
DATA
INTERRUPT
TO µP
0.1µF
TO SYSTEM
SHUTDOWN
________________________________________________________________ Maxim Integrated Products 1
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