MAX6689UP9A+ Maxim Integrated Products, MAX6689UP9A+ Datasheet

IC TEMP MONITOR 7CH 20TSSOP

MAX6689UP9A+

Manufacturer Part Number
MAX6689UP9A+
Description
IC TEMP MONITOR 7CH 20TSSOP
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6689UP9A.pdf (19 pages)

Specifications of MAX6689UP9A+

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-TSSOP
Full Temp Accuracy
+/- 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 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.
19-0567; Rev 1; 8/07
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
MAX6689
SMBDATA
♦ 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 QSOP and TSSOP Packages
♦ 2-Wire SMBus Interface
SMBCLK
Note: All devices are specified over the -40°C to +125°C
temperature range.
+Denotes lead-free package.
MAX6689EP34+
MAX6689EP38+
MAX6689EP9A+
MAX6689EP9E+
MAX6689UP34+
MAX6689UP38+
MAX6689UP9A+
MAX6689UP9E+
OVERT
ALERT
DXP6
DXN6
STBY
Safe System Protection
Throttling, and Shutdown
GND
N.C.
V
CC
PART
20
19
18
17
16
15
14
13
12
11
Typical Application Circuit
2200pF
PIN-
PACKAGE
20 QSOP
20 QSOP
20 QSOP
20 QSOP
20 TSSOP
20 TSSOP
20 TSSOP
20 TSSOP
Ordering Information
+3.3V
0.1μF
GPU
ADDRESS
0011 010
0011 100
1001 101
1001 111
0011 010
0011 100
1001 101
1001 111
4.7kΩ
EACH
SLAVE
CLK
DATA
INTERRUPT
TO μP
TO SYSTEM
SHUTDOWN
Features
CODE
U20-2
U20-2
U20-2
U20-2
E20-1
E20-1
E20-1
E20-1
PKG
1

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MAX6689UP9A+ Summary of contents

Page 1

... STBY Input for Hardware Standby Mode ♦ Small, 20-Pin QSOP and TSSOP Packages ♦ 2-Wire SMBus Interface PART MAX6689EP34+ MAX6689EP38+ Applications MAX6689EP9A+ MAX6689EP9E+ MAX6689UP34+ MAX6689UP38+ MAX6689UP9A+ MAX6689UP9E+ Note: All devices are specified over the -40°C to +125°C temperature range. +Denotes lead-free package DXP1 GND 2200pF MAX6689 ...

Page 2

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

Page 3

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

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 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 rupted, 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

Precision Temperature Monitor ADC Noise Filtering The integrating ADC has good noise rejection for low- frequency signals, such as power-supply hum. In envi- ronments with significant high-frequency EMI, connect an external 2200pF capacitor between DXP_ and DXN_. Larger capacitor ...

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

Precision Temperature Monitor (The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information www.maxim-ic.com/packages.) 18 ______________________________________________________________________________________ Package Information PACKAGE OUTLINE, QSOP .150", .025" LEAD PITCH 1 21-0055 ...

Page 19

... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 19 © 2007 Maxim Integrated Products Package Information (continued) PACKAGE OUTLINE, TSSOP 4 ...

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