Rainbow Electronics MAX6636 - Manual

General Description
The MAX6636 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 MAX6636 is specified for a -40°C to +125°C oper-
ating temperature range and is available in a 20-pin
TSSOP package.
Applications
Desktop Computers
Notebook Computers
Workstations
Servers
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 TSSOP Package
♦ 2-Wire SMBus Interface
♦ Penryn CPU-Compatible
♦ Pin- and Register-Compatible with MAX6689
MAX6636
7-Channel Precision Temperature Monitor
________________________________________________________________ Maxim Integrated Products 1
Ordering Information
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
20
19
18
17
16
15
14
13
1
2
3
4
5
6
7
8
GND
SMBCLK
SMBDATA
DXN2
DXP2
DXN1
DXP1
V CC
N.C.
DXN4
DXP4
DXN3
DXP3
12
11
9
10
DXP6
DXN6 DXN5
DXP5
MAX6636
ALERT
OVERT
STBY
2200pF
2200pF
2200pF
2200pF
2200pF
CPU
2200pF
GPU
0.1 μF
TO SYSTEM
SHUTDOWN
INTERRUPT
TO
μP
DATA
CLK
+3.3V
4.7k Ω
EACH
Typical Application Circuit
19-3004; Rev 0; 12/07
PART
PIN-
PACKAGE SLAVE
ADDRESS
PKG CODE
MAX6636UP9A+ 20 TSSOP 1001 101 U20-2
SMBus is a trademark of Intel Corp.
Note: Device specified over the -40°C to +125°C temperature
range.
+ Denotes lead-free package.
Pin Configuration appears at end of data sheet.