MAX6636UP9A+ Maxim Integrated Products, MAX6636UP9A+ Datasheet

IC PREC TEMP MONITOR 7CH 20TSSOP

MAX6636UP9A+

Manufacturer Part Number
MAX6636UP9A+
Description
IC PREC TEMP MONITOR 7CH 20TSSOP
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6636UP9A.pdf (18 pages)

Specifications of MAX6636UP9A+

Function
Temp Monitoring System (Sensor)
Topology
ADC, Buffer, Register Bank
Sensor Type
External & Internal
Sensing Temperature
-40°C ~ 125°C, External Sensor
Output Type
SMBus™
Output Alarm
Yes
Output Fan
Yes
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP
Full Temp Accuracy
- 0.1 C, 3 C
Digital Output - Bus Interface
Serial (2-Wire)
Digital Output - Number Of Bits
11 bit
Maximum Operating Temperature
+ 125 C
Minimum Operating Temperature
- 40 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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.
19-3004; Rev 0; 12/07
SMBus is a trademark of Intel Corp.
Pin Configuration appears at end of data sheet.
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.
Desktop Computers
Notebook Computers
Workstations
Servers
7-Channel Precision Temperature Monitor
________________________________________________________________ Maxim Integrated Products
CPU
General Description
Applications
2200pF
2200pF
2200pF
2200pF
2200pF
10
1
2
3
4
5
6
7
8
9
DXP1
DXN1
DXP2
DXN2
DXP3
DXN3
DXP4
DXN4
DXP5
DXN5
MAX6636
SMBDATA
SMBCLK
OVERT
ALERT
DXN6
STBY
DXP6
GND
N.C.
♦ Six Thermal-Diode Inputs
♦ Local Temperature Sensor
♦ 1°C Remote Temperature Accuracy (+60°C to +100°C)
♦ Temperature Monitoring Begins at POR for Fail-
♦ ALERT and OVERT Outputs for Interrupts,
♦ STBY Input for Hardware Standby Mode
♦ Small, 20-Pin TSSOP Package
♦ 2-Wire SMBus Interface
♦ Penryn CPU-Compatible
♦ Pin- and Register-Compatible with MAX6689
V
Note: Device specified over the -40°C to +125°C temperature
range.
+ Denotes lead-free package.
MAX6636UP9A+
CC
Safe System Protection
Throttling, and Shutdown
20
19
18
17
16
15
14
13
12
11
PART
Typical Application Circuit
2200pF
PIN-
PACKAGE
20 TSSOP
+3.3V
0.1μF
Ordering Information
GPU
4.7kΩ
EACH
CLK
DATA
INTERRUPT
TO μP
TO SYSTEM
SHUTDOWN
ADDRESS
1001 101
SLAVE
Features
PKG CODE
U20-2
1

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MAX6636UP9A+ Summary of contents

Page 1

... STBY Input for Hardware Standby Mode ♦ Small, 20-Pin TSSOP Package ♦ 2-Wire SMBus Interface ♦ Penryn CPU-Compatible ♦ Pin- and Register-Compatible with MAX6689 Applications PART MAX6636UP9A+ Note: Device specified over the -40°C to +125°C temperature range. + Denotes lead-free package DXP1 ...

Page 2

Precision Temperature Monitor ABSOLUTE MAXIMUM RATINGS , SCK, SDA, ALERT, OVERT, STBY to GND ......-0. DXP_ to GND..............................................-0. DXN2, DXN3, DXN4, DXN5, DXN6 to GND...........-0.3V to +0.8V SDA, ALERT, OVERT Current .............................-1mA to ...

Page 3

Precision Temperature Monitor ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V STBY +25°C.) (Note 1) A PARAMETER SYMBOL SMBus INTERFACE (SCL, SDA), STBY Logic-Input Low Voltage Logic-Input High Voltage Input Leakage Current ...

Page 4

Precision Temperature Monitor (V = 3.3V +25°C, unless otherwise noted.) STBY SOFTWARE STANDBY SUPPLY CURRENT vs. SUPPLY VOLTAGE ...

Page 5

Precision Temperature Monitor (V = 3.3V +25°C, unless otherwise noted.) STBY REMOTE TEMPERATURE ERROR vs. COMMON-MODE NOISE FREQUENCY 5 100mV P ...

Page 6

Precision Temperature Monitor PIN NAME Combined Current Source and A/D Positive Input for Channel 5 Remote Diode. Connect to the anode 9 DXP5 of a remote-diode-connected temperature-sensing transistor. Leave unconnected or connect remote diode is used. ...

Page 7

Precision Temperature Monitor DXP1 DXN1 DXP2 DXN2 DXP3 DXN3 DXP4 DXN4 DXP5 DXN5 DXP6 DXN6 Figure 1. Internal Block Diagram ed, and the temperature registers are not updated. The previous data is not changed and remains available. SMBus Digital ...

Page 8

Precision Temperature Monitor WRITE BYTE FORMAT S ADDRESS WR 7 BITS SLAVE ADDRESS: EQUIVA- LENT TO CHIP-SELECT LINE OF A 3-WIRE INTERFACE READ BYTE FORMAT S ADDRESS WR ACK COMMAND 7 BITS SLAVE ADDRESS: EQUIVA- COMMAND BYTE: SELECTS LENT ...

Page 9

Precision Temperature Monitor HIGH LOW SMBCLK SMBDATA SU:STA HD:STA SU:DAT A = START CONDITION MSB OF ADDRESS CLOCKED INTO SLAVE LSB OF ADDRESS CLOCKED INTO SLAVE ...

Page 10

Precision Temperature Monitor ALERT Response Address The SMBus alert response interrupt pointer provides quick fault identification for simple slave devices that lack the complex logic needed bus master. Upon receiving an interrupt signal, the host master ...

Page 11

Precision Temperature Monitor Table 3. Command Byte Register Bit Assignment ADDRESS REGISTER (hex) Local 07 Remote 1 01 Remote 2 02 Remote 3 03 Remote 4 04 Remote 5 05 Remote 6 06 Configuration 1 41 Configuration 2 42 ...

Page 12

Precision Temperature Monitor Table 4. Configuration 1 Register BIT NAME 7 (MSB) STOP 6 POR TIMEOUT 5 4 Fast remote 1 Resistance 3 cancellation 2 Reserved 1 Reserved 0 Reserved Table 5. Configuration 2 Register BIT NAME 7 (MSB) ...

Page 13

Precision Temperature Monitor Table 6. Configuration 3 Register BIT NAME 7 (MSB) Reserved 6 Reserved 5 Mask OVERT 6 4 Mask OVERT 5 3 Mask OVERT 4 2 Reserved 1 Reserved 0 Mask OVERT 1 factor n is used ...

Page 14

Precision Temperature Monitor Table 7. Status 1 Register BIT NAME 7 (MSB) Reserved 6 Local ALERT 5 Remote 6 ALERT 4 Remote 5 ALERT 3 Remote 4 ALERT 2 Remote 3 ALERT 1 Remote 2 ALERT 0 Remote 1 ...

Page 15

Precision Temperature Monitor Table 8. Status 2 Register BIT NAME 7 (MSB) Reserved 6 Reserved 5 Remote 6 OVERT 4 Remote 5 OVERT 3 Remote 4 OVERT 2 Reserved 1 Reserved 0 Remote 1 OVERT Table 9. Status 3 ...

Page 16

... SMBT3904 Zetex (England) FMMT3904CT-ND Note: Discrete transistors must be diode connected (base shorted to collector). The 7-bit slave address of the MAX6636UP9A+ is 1001 101 (binary). Follow these guidelines to reduce the measurement error when measuring remote temperature: 1) Place the MAX6636 as close as is practical to the remote diode. In noisy environments, such as a computer motherboard, this distance can be 4in to 8in (typ) ...

Page 17

Precision Temperature Monitor Twisted-Pair and Shielded Cables Use a twisted-pair cable to connect the remote sensor for remote-sensor distances longer than 8in or in very noisy environments. Twisted-pair cable lengths can be between 6ft and 12ft before noise introduces ...

Page 18

... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2007 Maxim Integrated Products Package Information PACKAGE OUTLINE, TSSOP 4 ...

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