General Description
The MAX6622 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 MAX6622 is specified for a -40癈 to +125癈 oper-
ating temperature range and is available in a 16-pin
TSSOP package.
Applications
Desktop Computers
Notebook Computers
Workstations
Servers
Features
f Four Thermal-Diode Inputs
f Local Temperature Sensor
f 1?/SPAN>C Remote Temperature Accuracy (+60?/SPAN>C to +100?/SPAN>C)
f Temperature Monitoring Begins at POR for Fail-
Safe System Protection
f ALERT and OVERT Outputs for Interrupts,
Throttling, and Shutdown
f STBY Input for Hardware Standby Mode
f Small, 16-Pin TSSOP Package
f 2-Wire SMBus Interface
f Penryn CPU-Compatible
f Pin- and Register-Compatible with MAX6602
5-Channel Precision Temperature Monitor
________________________________________________________________ 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.
Ordering Information
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
MAX6622
ALERT
OVERT
2200pF
2200pF
2200pF
2200pF
CPU
0.1糉
TO SYSTEM
SHUTDOWN
INTERRUPT
TO 糚
DATA
CLK
4.7k?/DIV>
EACH
+3.3V
Typical Application Circuit
19-3003; Rev 0; 12/07
PART
PIN-
PACKAGE
SLAVE
ADDRESS
PKG
CODE
MAX6622UE9A+ 16 TSSOP
1001 101
U16-1
SMBus is a trademark of Intel Corp.
Note: This device is specified over the -40?/SPAN>C to +125?/SPAN>C
temperature range.
+Denotes lead-free package.
Pin Configuration appears at end of data sheet.
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