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PDF MAX6689 Data sheet ( Hoja de datos )
| Número de pieza | MAX6689 | |
| Descripción | 7-Channel Precision Temperature Monitor | |
| Fabricantes | Maxim Integrated Products | |
| Logotipo |  |
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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
2200pF
3 DXP2
4 DXN2
2200pF
5 DXP3
6 DXN3
2200pF
7 DXP4
8 DXN4
9 DXP5
2200pF
10 DXN5
SMBDATA 18
ALERT 17
VCC 16
OVERT 15
N.C. 14
STBY 13
DXP6 12
DXN6 11
DATA
INTERRUPT
TO µP
0.1µF
TO SYSTEM
SHUTDOWN
2200pF
GPU
________________________________________________________________ Maxim Integrated Products 1
For pricing delivery, and ordering information please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
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7-Channel Precision Temperature Monitor
Typical Operating Characteristics (continued)
(VCC = 3.3V, VSTBY = VCC, TA = +25°C, unless otherwise noted.)
REMOTE TEMPERATURE ERROR
vs. COMMON-MODE NOISE FREQUENCY
5
4 100mVP-P
3
2
1
0
-1
-2
-3
-4
-5
0.001
0.01 0.1
1
FREQUENCY (MHz)
10
0
-0.5
-1.0
-1.5
-2.0
-2.5
-3.0
-3.5
-4.0
-4.5
-5.0
1
TEMPERATURE ERROR
vs. DXP-DXN CAPACITANCE
10
DXP-DXN CAPACITANCE (nF)
100
Pin Description
PIN NAME
FUNCTION
Combined Current Source and A/D Positive Input for Channel 1 Remote Diode. Connect to the anode
1 DXP1 of a remote-diode-connected temperature-sensing transistor. Leave floating or connect to DXN1 if no
remote diode is used. Place a 2200pF capacitor between DXP1 and DXN1 for noise filtering.
2
DXN1
Cathode Input for Channel 1 Remote Diode. Connect the cathode of the channel 1 remote-diode-
connected transistor to DXN1.
Combined Current Source and A/D Positive Input for Channel 2 Remote Diode. Connect to the anode
3 DXP2 of a remote-diode-connected temperature-sensing transistor. Leave floating or connect to DXN2 if no
remote diode is used. Place a 2200pF capacitor between DXP2 and DXN2 for noise filtering.
4
DXN2
Cathode Input for Channel 2 Remote Diode. Connect the cathode of the channel 2 remote-diode-
connected transistor to DXN2.
Combined Current Source and A/D Positive Input for Channel 3 Remote Diode. Connect to the anode
5 DXP3 of a remote-diode-connected temperature-sensing transistor. Leave floating or connect to DXN3 if no
remote diode is used. Place a 2200pF capacitor between DXP3 and DXN3 for noise filtering.
6
DXN3
Cathode Input for Channel 3 Remote Diode. Connect the cathode of the channel 1 remote-diode-
connected transistor to DXN3.
Combined Current Source and A/D Positive Input for Channel 4 Remote Diode. Connect to the anode
7 DXP4 of a remote-diode-connected temperature-sensing transistor. Leave floating or connect to DXN4 if no
remote diode is used. Place a 2200pF capacitor between DXP4 and DXN4 for noise filtering.
8
DXN4
Cathode Input for Channel 4 Remote Diode. Connect the cathode of the channel 1 remote-diode-
connected transistor to DXN4.
_______________________________________________________________________________________ 5
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7-Channel Precision Temperature Monitor
Table 3. Command Byte Register Bit Assignment
REGISTER
ADDRESS POR STATE READ/
(HEX)
(HEX)
WRITE
DESCRIPTION
Local
07 00 R Read local temperature register
Remote 1
01 00 R Read channel 1 remote temperature register
Remote 2
02 00 R Read channel 2 remote temperature register
Remote 3
03 00 R Read channel 3 remote temperature register
Remote 4
04 00 R Read channel 4 remote temperature register
Remote 5
05 00 R Read channel 5 remote temperature register
Remote 6
06 00 R Read channel 6 remote temperature register
Configuration 1
41 00 R/W Read/write configuration register 1
Configuration 2
42 00 R/W Read/write configuration register 2
Configuration 3
43 00 R/W Read/write configuration register 3
Status1
44 00 R Read status register 1
Status2
45 00 R Read status register 2
Status3
46 00 R Read status register 3
Local ALERT High Limit 17 5A R/W Read/write local alert high-temperature threshold limit register
Remote 1 ALERT High Limit
11
6E R/W Read/write channel 1 remote-diode alert high-temperature
threshold limit register
Remote 2 ALERT High Limit
12
7F R/W Read/write channel 2 remote-diode alert high-temperature
threshold limit register
Remote 3 ALERT High Limit
13
64 R/W Read/write channel 3 remote-diode alert high-temperature
threshold limit register
Remote 4 ALERT High Limit
14
64 R/W Read/write channel 4 remote-diode alert high-temperature
threshold limit register
Remote 5 ALERT High Limit
15
64
R/W
Read/write channel 5 remote-diode alert high-temperature
threshold limit register
Remote 6 ALERT High Limit
16
64
R/W
Read/write channel 6 remote-diode alert high-temperature
threshold limit register
Remote 1 OVERT High Limit
21
6E
R/W
Read/write channel 1 remote-diode overtemperature threshold
limit register
Remote 4 OVERT High Limit
24
7F
R/W
Read/write channel 4 remote-diode overtemperature threshold
limit register
Remote 5 OVERT High Limit
25
5A
R/W
Read/write channel 5 remote-diode overtemperature threshold
limit register
Remote 6 OVERT High Limit
26
5A
R/W
Read/write channel 6 remote-diode overtemperature threshold
limit register
Remote 1 Extended
Temperature
09 00 R Read channel 1 remote-diode extended temperature register
Manufacturer ID
0A 4D R Read manufacturer ID
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 19 Páginas | |
| PDF Descargar | [ Datasheet MAX6689.PDF ] | |
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