MAX6697EP34+ Maxim Integrated Products, MAX6697EP34+ Datasheet

IC TEMP MON 7CH PREC 20-QSOP

MAX6697EP34+

Manufacturer Part Number
MAX6697EP34+
Description
IC TEMP MON 7CH PREC 20-QSOP
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6697UP34T.pdf (18 pages)

Specifications of MAX6697EP34+

Function
Temp Monitoring System (Sensor)
Topology
ADC, Buffer, Register Bank
Sensor Type
External & Internal
Sensing Temperature
-40°C ~ 125°C, External Sensor
Output Type
I²C™/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-QSOP
Full Temp Accuracy
+/- 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 MAX6697 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 MAX6697 is specified for an operating temperature
range of -40°C to +125°C and is available in 20-pin
QSOP and 20-pin TSSOP packages.
19-3477; Rev 3; 5/09
SMBus is a trademark of Intel Corp.
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
DXP
DXN
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
MAX6697
SMBDATA
♦ Six Thermal-Diode Inputs
♦ Local Temperature Sensor
♦ 1°C Remote Temperature Accuracy (+60°C to
♦ Temperature Monitoring Begins at POR for Fail-
♦ ALERT and OVERT Outputs for Interrupts,
♦ Small 20-Pin QSOP and 20-Pin TSSOP Packages
♦ 2-Wire SMBus Interface
SMBCLK
*See the Slave Address section.
Pin Configuration appears at end of data sheet.
MAX6697EP_ _
MAX6697UP_ _
OVERT
ALERT
DXP6
DXN6
+100°C)
Safe System Protection
Throttling, and Shutdown
GND
NC1
NC2
V
CC
20
19
18
17
16
15
14
13
12
11
PART
Typical Application Circuit
2200pF
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
Ordering Information
+3.3V
0.1μF
DXN
DXP
GPU
4.7kΩ
EACH
CLK
DATA
INTERRUPT
TO μP
TO SYSTEM
SHUTDOWN
PIN-PACKAGE
20 QSOP
20 TSSOP
Features
1

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MAX6697EP34+ Summary of contents

Page 1

... Servers SMBus is a trademark of Intel Corp. CPU DXP DXN ________________________________________________________________ Maxim Integrated Products 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. ♦ Six Thermal-Diode Inputs ♦ Local Temperature Sensor ♦ 1°C Remote Temperature Accuracy (+60°C to +100° ...

Page 2

Precision Temperature Monitor ABSOLUTE MAXIMUM RATINGS , SCK, SDA, ALERT, OVERT to GND ................-0. DXP_ to GND..............................................-0. DXN_ to GND ........................................................-0.3V to +0.8V SDA, ALERT, OVERT Current .............................-1mA to +50mA DXN Current .......................................................................±1mA ...

Page 3

Precision Temperature Monitor ELECTRICAL CHARACTERISTICS (continued +3.0V to +5.5V -40°C to +125°C, unless otherwise noted. Typical values are PARAMETER SYMBOL SMBus INTERFACE (SCL, SDA) Logic-Input Low Voltage Logic-Input High Voltage Input ...

Page 4

Precision Temperature Monitor (V = 3.3V +25°C, unless otherwise noted STANDBY SUPPLY CURRENT vs. SUPPLY VOLTAGE 3.3 3.8 4.3 4.8 5.3 SUPPLY ...

Page 5

Precision Temperature Monitor 7-Channel Precision Temperature Monitor (V = 3.3V +25°C, unless otherwise noted REMOTE TEMPERATURE ERROR vs. COMMON-MODE NOISE FREQUENCY 5 100mV P 0.001 ...

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 floating or connect to V remote diode is used. Place ...

Page 7

Precision Temperature Monitor DXP1 DXN1 DXP2 DXN2 DXP3 DXN3 DXP4 DXN4 DXP5 DXN5 DXP6 DXN6 Figure 1. Internal Block Diagram SMBus Digital Interface From a software perspective, the MAX6697 appears as a series of 8-bit registers that contain temperature ...

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 S ADDRESS WR ACK 7 bits Slave Address: equiva- lent to chip-select line Send Byte Format S ...

Page 9

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

Page 10

Precision Temperature Monitor can share a common interrupt line. All ALERT interrupts can be masked using the configuration 3 register. The POR state of these registers is shown in Table 1. ALERT Response Address The SMBus alert response interrupt ...

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) Reserved 6 ...

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 remote-diode sensor designed for a ...

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 ALERT ...

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 Register ...

Page 16

Precision Temperature Monitor Table 10. Remote-Sensors Transistor Manufacturer MANUFACTURER Central Semiconductor (USA) CMPT3904 Rohm Semiconductor (USA) SST3904 Samsung (Korea) KST3904-TF Siemens (Germany) SMBT3904 Zetex (England) FMMT3904CT-ND Note: Discrete transistors must be diode connected (base shorted to collector). Table 11 ...

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 © 2009 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products Inc ...

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