MAX6689 Datasheet, PDF (1/19 Pages) Maxim Integrated Products – 7-Channel Precision Temperature Monitor

19-0567; Rev 0; 5/06
7-Channel Precision Temperature Monitor
General Description
The MAX6689 precision multichannel temperature sen-
sor monitors its own temperature and the temperatures
of up to six external diode-connected transistors. All
temperature channels have programmable alert thresh-
olds. Channels 1, 4, 5, and 6 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 MAX6689 is specified for an operating temperature
range of -40°C to +125°C and is available in 20-pin
QSOP and TSSOP packages.
Applications
Desktop Computers
Notebook Computers
Workstations
Servers
SMBus is a trademark of Intel Corp.
Pin Configuration appears at end of data sheet.
Features
♦ Six Thermal-Diode Inputs
♦ Local Temperature Sensor
♦ 1°C Remote Temperature Accuracy (+60°C to +100°C)
♦ Temperature Monitoring Begins at POR for Fail-
Safe System Protection
♦ ALERT and OVERT Outputs for Interrupts,
Throttling, and Shutdown
♦ STBY Input for Hardware Standby Mode
♦ Small, 20-Pin QSOP and TSSOP Packages
♦ 2-Wire SMBus Interface
Ordering Information
PART
PIN-
SLAVE
PACKAGE ADDRESS
PKG
CODE
MAX6689EP34+ 20 QSOP
0011 010
E20-1
MAX6689EP38+ 20 QSOP
0011 100
E20-1
MAX6689EP9A+ 20 QSOP
1001 101
E20-1
MAX6689EP9E+ 20 QSOP
1001 111
E20-1
MAX6689UP34+ 20 TSSOP 0011 010
U20-2
MAX6689UP38+ 20 TSSOP 0011 100
U20-2
MAX6689UP9A+ 20 TSSOP 1001 101
U20-2
MAX6689UP9E+ 20 TSSOP 1001 111
U20-2
Note: All devices are specified over the -40°C to +125°C
temperature range.
+Denotes lead-free package.
Typical Application Circuit
+3.3V
CPU
2200pF
1 _DXP1
2 _DXN1
GND ²⁰
MAX6689 _SMBCLK 19
4.7kΩ
EACH
CLK
3 _DXP2
2200pF
4 _DXN2
5 _DXP3
2200pF
6 _DXN3
7 _DXP4
2200pF
8 _DXN4
9 _DXP5
2200pF
10 _DXN5
SMBDATA ¹⁸
ALERT ¹⁷
V_CC ¹⁶
OVERT ¹⁵
N.C. ¹⁴
STBY ¹³
DXP6 ¹²
DXN6 ¹¹
DATA
INTERRUPT
TO µP
0.1µF
TO SYSTEM
SHUTDOWN
GPU
2200pF
________________________________________________________________ Maxim Integrated Products 1
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