MAX6694TE9A+ Maxim Integrated Products, MAX6694TE9A+ Datasheet

IC TEMP MONITOR 5CH 16TQFN

MAX6694TE9A+

Manufacturer Part Number
MAX6694TE9A+
Description
IC TEMP MONITOR 5CH 16TQFN
Manufacturer
Maxim Integrated Products
Datasheet
1.MAX6694UE9A.pdf (18 pages)

Specifications of MAX6694TE9A+

Function
Temp Monitoring System (Sensor)
Topology
ADC, Buffer, Multiplexer, 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 ~ 3.6 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
16-TQFN Exposed Pad
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX6694 precision multichannel temperature sen-
sor monitors its own temperature and the temperatures
of up to four external diode-connected transistors. All
temperature channels have programmable alert thresh-
olds. Channels 1 and 4 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 MAX6694 is specified for a -40°C to +125°C oper-
ating temperature range and is available in 16-pin
TSSOP and 5mm x 5mm thin QFN packages.
19-4097; Rev 0; 4/08
SMBus is a trademark of Intel Corp.
Pin Configurations appear 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
5-Channel Precision Temperature Monitor
________________________________________________________________ Maxim Integrated Products
CPU
General Description
100pF
100pF
100pF
100pF
Applications
1
2
3
4
5
6
7
8
DXP1
DXN1
DXP2
DXN2
DXP3
DXN3
DXP4
DXN4
MAX6694
with Beta Compensation
SMBDATA
SMBCLK
OVERT
ALERT
STBY
o Four Thermal-Diode Inputs
o Beta Compensation (Channel 1)
o Local Temperature Sensor
o 1.5°C Remote Temperature Accuracy (+60°C to
o Temperature Monitoring Begins at POR for Fail-
o ALERT and OVERT Outputs for Interrupts,
o STBY Input for Hardware Standby Mode
o Small, 16-Pin TSSOP and TQFN Packages
o 2-Wire SMBus Interface
GND
+ Denotes a lead-free package.
* EP = Exposed pad.
Note: Slave address is 1001 101.
N.C.
V
CC
MAX6694UE9A+
MAX6694TE9A+
+100°C)
Safe System Protection
Throttling, and Shutdown
16
15
14
13
12
11
10
9
PART
Typical Application Circuit
-40°C to +125°C
-40°C to +125°C
TEMP RANGE
Ordering Information
+3.3V
0.1µF
4.7kΩ
EACH
CLK
DATA
INTERRUPT
TO µP
TO SYSTEM
SHUTDOWN
16 TSSOP
16 TQFN-EP*
PIN-PACKAGE
Features
1

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MAX6694TE9A+ Summary of contents

Page 1

... Safe System Protection o ALERT and OVERT Outputs for Interrupts, Throttling, and Shutdown o STBY Input for Hardware Standby Mode o Small, 16-Pin TSSOP and TQFN Packages o 2-Wire SMBus Interface Applications PART MAX6694UE9A+ MAX6694TE9A+ + Denotes a lead-free package Exposed pad. Note: Slave address is 1001 101 DXP1 GND 2 ...

Page 2

Precision Temperature Monitor with Beta Compensation ABSOLUTE MAXIMUM RATINGS , SMBCLK, SMBDATA, ALERT, OVERT STBY to GND ....................................................-0.3V to +6.0V DXP_ to GND..............................................-0. DXN_ to GND ........................................................-0.3V to +0.8V SMBDATA, ALERT, OVERT Current....................-1mA to +50mA ...

Page 3

Precision Temperature Monitor ELECTRICAL CHARACTERISTICS (continued +3.0V to +3.6V STBY CC CC +25°C.) (Note 2) PARAMETER SYMBOL Remote-Diode Source Current Undervoltage-Lockout Threshold Undervoltage-Lockout Hysteresis Power-On-Reset (POR) Threshold POR Threshold Hysteresis ALERT, OVERT ...

Page 4

Precision Temperature Monitor with Beta Compensation ELECTRICAL CHARACTERISTICS (continued +3.0V to +3.6V STBY CC CC +25°C.) (Note 1) PARAMETER SYMBOL Data Setup Time t SU:DAT Receive SMBCLK/SMBDATA Rise Time Receive SMBCLK/SMBDATA Fall ...

Page 5

Precision Temperature Monitor (V = 3.3V +25°C, unless otherwise noted.) STBY SOFTWARE STANDBY SUPPLY CURRENT vs. SUPPLY VOLTAGE 3.8 3.7 3.6 3.5 3.4 3.3 3.2 3.1 3.0 3.0 3.1 3.2 ...

Page 6

Precision Temperature Monitor with Beta Compensation PIN NAME TSSOP TQFN- DXP1 2 16 DXN1 3 1 DXP2 4 2 DXN2 5 3 DXP3 6 4 DXN3 7 5 DXP4 8 6 DXN4 STBY ...

Page 7

Precision Temperature Monitor Detailed Description The MAX6694 is a precision multichannel temperature monitor that features one local and four remote temper- ature-sensing channels with a programmable alert threshold for each temperature channel and a program- mable overtemperature threshold for ...

Page 8

Precision Temperature Monitor with Beta Compensation 350µA. During either software or hardware standby, data is retained in memory. During hardware standby, the SMBus interface is inactive. During software stand- by, the SMBus interface is active and listening for SMBus ...

Page 9

Precision Temperature Monitor LOW HIGH SMBCLK SMBDATA t t HD:STA SU:STA A = START CONDITION MSB OF ADDRESS CLOCKED INTO SLAVE LSB OF ADDRESS CLOCKED INTO SLAVE R/W BIT ...

Page 10

Precision Temperature Monitor with Beta Compensation can be read from the local temperature and remote temperature registers. The remaining 3 bits for remote diode 1 can be read from the extended temperature register. If extended resolution is desired, the ...

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 Configuration 1 41 Configuration 2 42 Configuration 3 43 Status1 44 Status2 ...

Page 12

Precision Temperature Monitor with Beta Compensation Configuration Byte Functions There are three read-write configuration registers (Tables 4, 5, and 6) that can be used to control the MAX6694’s operation. Configuration 1 Register The configuration 1 register (Table 4) has ...

Page 13

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

Page 14

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

Page 15

Precision Temperature Monitor Table 9. Status 3 Register BIT NAME 7 (MSB) Reserved 6 Reserved 5 Reserved 4 Diode fault 4 3 Diode fault 3 2 Diode fault 2 1 Diode fault 1 0 Reserved For a real temperature ...

Page 16

Precision Temperature Monitor with Beta Compensation can be violated. The forward voltage at the highest expected temperature must be greater than 0.25V at 10µA, and at the lowest expected temperature, the for- ward voltage must be less than 0.95V ...

Page 17

Precision Temperature Monitor 3) Route the DXP and DXN traces in parallel and in close proximity to each other. Each parallel pair of traces should remote diode. Route these traces away from any higher voltage traces, ...

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 © 2008 Maxim Integrated Products ...

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