PDF MAX6636 Data sheet ( Hoja de datos )

Número de pieza	MAX6636
Descripción	7-Channel Precision Temperature Monitor
Fabricantes	Maxim Integrated Products
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No Preview Available ! 19-3004; Rev 0; 12/07 7-Channel Precision Temperature Monitor www.datasheet4u.com 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 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 TSSOP Package ♦ 2-Wire SMBus Interface ♦ Penryn CPU-Compatible ♦ Pin- and Register-Compatible with MAX6689 Ordering Information PART PIN- SLAVE PKG CODE PACKAGE ADDRESS MAX6636UP9A+ 20 TSSOP 1001 101 U20-2 Note: Device 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 MAX6636 SMBCLK 19 4.7kΩ EACH CLK 3 DXP2 2200pF 4 DXN2 5 DXP3 2200pF 6 DXN3 7 DXP4 2200pF 8 DXN4 2200pF 9 DXP5 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 Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 page 7-Channel Precision Temperature Monitor www.datasheet4u.com 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 unconnected or connect to VCC 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. Internally connected to GND. 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 unconnected or connect to VCC 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 unconnected or connect to VCC 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 unconnected or connect to VCC 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 5 Page 7-Channel Precision Temperature Monitor www.daTtasahbeelet4u3.c.omCommand Byte Register Bit Assignment REGISTER ADDRESS POR STATE READ/ (hex) (hex) WRITE DESCRIPTION Local Remote 1 Remote 2 Remote 3 Remote 4 Remote 5 Remote 6 Configuration 1 Configuration 2 Configuration 3 Status1 Status2 Status3 Local ALERT High Limit 07 01 02 03 04 05 06 41 42 43 44 45 46 17 00 R Read local temperature register 00 R Read channel 1 remote temperature register 00 R Read channel 2 remote temperature register 00 R Read channel 3 remote temperature register 00 R Read channel 4 remote temperature register 00 R Read channel 5 remote temperature register 00 R Read channel 6 remote temperature register 00 R/W Read/write configuration register 1 00 R/W Read/write configuration register 2 00 R/W Read/write configuration register 3 00 R Read status register 1 00 R Read status register 2 00 R Read status register 3 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 Manufacturer ID 09 00 R Read channel 1 remote-diode extended temperature register 0A 4D R Read manufacturer ID ______________________________________________________________________________________ 11 11 Page

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