MAX6693UP9A+-MAX6693UP9A+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX6693UP9A+ ,7-Channel Precision Temperature Monitor with Beta CompensationApplicationsMAX6693UP9A+ -40°C to +125°C 20 TSSOPDesktop Computers +Denotes a lead-free package.Not ..
MAX6693UP9A+ ,7-Channel Precision Temperature Monitor with Beta CompensationELECTRICAL CHARACTERISTICS(V = +3.0V to +3.6V, V = V , T = -40°C to +125°C, unless otherwise noted. ..
MAX6693UP9A+T ,7-Channel Precision Temperature Monitor with Beta CompensationFeaturesThe MAX6693 precision multichannel temperature sen- ♦ Six Thermal-Diode Inputssor monitors ..
MAX6694TE9A+ ,5-Channel Precision Temperature Monitor with Beta CompensationFeaturesThe MAX6694 precision multichannel temperature sen- ♦ Four Thermal-Diode Inputssor monitors ..
MAX6694TE9A+T ,5-Channel Precision Temperature Monitor with Beta CompensationApplications Ordering InformationDesktop Computers PART TEMP RANGE PIN-PACKAGENotebook Computers MA ..
MAX6694UE9A+ ,5-Channel Precision Temperature Monitor with Beta CompensationELECTRICAL CHARACTERISTICS(V = +3.0V to +3.6V, V = V , T = -40°C to +125°C, unless otherwise noted. ..
MB3771PF-G-BND-JNE1 , ASSP For power supply applications BIPOLAR Power Supply Monitor
MB3771PS ,Power Supply MonitorFUJITSU SEMICONDUCTORDS04-27400-7EDATA SHEETASSP For power supply
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MB3775 ,SWITCHING REGULATOR CONTROLLERFUJITSU SEMICONDUCTORDS04-27204-3EDATA SHEETASSPSWITCHING REGULATOR CONTROLLERMB3775LOW VOLTAGE DUA ..
MB3775PF , SWITCHING REGULATOR CONTROLLER

MAX6693UP9A+-MAX6693UP9A+T
7-Channel Precision Temperature Monitor with Beta Compensation
General Description
The MAX6693 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, OVERTand 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 MAX6693 is specified for an operating temperature
range of -40°C to +125°C and is available in a 20-pin
TSSOP package.
Applications
Desktop Computers
Notebook Computers
Workstations
Servers
FeaturesSix Thermal-Diode InputsBeta Compensation (Channel 1)Local Temperature Sensor1.5°C Remote Temperature Accuracy (+60°C to
+100°C)Temperature Monitoring Begins at POR for Fail-
Safe System ProtectionALERTand OVERTOutputs for Interrupts,
Throttling, and ShutdownSTBYInput for Hardware Standby ModeSmall, 20-Pin TSSOP Package2-Wire SMBus Interface
MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
GND
SMBCLK
SMBDATA
DXN2
DXP2
DXN1
DXP1
VCC
N.C.
DXN4
DXP4
DXN3
DXP3
DXP6
DXN6DXN5
DXP5
MAX6693
ALERT
OVERT
STBY
100pF
100pF
100pF
100pF
100pF
CPU
100pF
GPU
0.1μF
TO SYSTEM
SHUTDOWN
INTERRUPT
TO μP
DATA
CLK
4.7kΩ
EACH
+3.3V
Typical Application Circuit
19-4096; Rev 0; 5/08
SMBus is a trademark of Intel Corp.
Pin Configuration appears at end of data sheet.
Ordering Information
PARTTEMP RANGEPIN-PACKAGE
MAX6693UP9A+-40°C to +125°C20 TSSOP
+Denotes a lead-free package.
Note:Slave address is 1001 101.
MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
ABSOLUTE MAXIMUM RATINGS
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
VCC, SMBCLK, SMBDATA, ALERT, OVERT,
STBYto GND ....................................................-0.3V to +6.0V
DXP_ to GND..............................................-0.3V to (VCC+ 0.3V)
DXN_ to GND........................................................-0.3V to +0.8V
SMBDATA, ALERT, OVERTCurrent....................-1mA to +50mA
DXN_ Current......................................................................±1mA
Continuous Power Dissipation (TA= +70°C)
20-Pin TSSOP
(derate 13.6mW/°C above +70°C).............................1084mW
Junction-to-Case Thermal Resistance (θJC) (Note 1)
20-Pin TSSOP...............................................................20°C/W
Junction-to-Ambient Thermal Resistance (θJA) (Note 1)
20-Pin TSSOP............................................................73.8°C/W
ESD Protection (all pins, Human Body Model)....................±2kV
Operating Temperature Range.........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature (soldering, 10s).................................+300°C
ELECTRICAL CHARACTERISTICS
(VCC= +3.0V to +3.6V, VSTBY= VCC, TA= -40°C to +125°C, unless otherwise noted. Typical values are at VCC= +3.3V and TA=
+25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply VoltageVCC3.03.6V
Software Standby Supply CurrentISSSMBus static310µA
Operating CurrentICCDuring conversion (Note 3)5002000µA
Channel 1 only11Temperature ResolutionOther diode channels8Bits
TA = TRJ = +60°C to +100°C-1.5+1.53 σ Temperature Accuracy
(Remote Channel 1)
VCC = 3.3V,
ß = 0.5TA = TRJ = 0°C to +125°C-2.375+2.375°C
TA = TRJ = +60°C to +100°C-2+23 σ Temperature Accuracy
(Remote Channels 2–6)VCC = 3.3VTA = TRJ = 0°C to +125°C-2.5+2.5°C
TA = +60°C to +100°C-2+23 σ Temperature Accuracy
(Local)VCC = 3.3VTA = 0°C to +125°C-2.5+2.5°C
TA = TRJ = +60°C to +100°C-3+36 σ Temperature Accuracy
(Remote Channel 1)
VCC = 3.3V,
ß = 0.5TA = TRJ = 0°C to +125°C-4+4°C
TA = TRJ = +60°C to +100°C-3+36 σ Temperature Accuracy
(Remote Channels 2–6)VCC = 3.3VTA = TRJ = 0°C to +125°C-3.5+3.5°C
TA = +60°C to +100°C-2.5+2.56 σ Temperature Accuracy
(Local)VCC = 3.3VTA = 0°C to +125°C-3+3°C
Supply Sensitivity of Temperature
Accuracy±0.2oC/V
Remote Channel 1 Conversion
TimetCONV1190250312ms
Remote Channels 2–6
Conversion TimetCONV_95125156ms
Note 1:Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-
layer board. For detailed information on package thermal considerations, refer to /thermal-tutorial.
MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
ELECTRICAL CHARACTERISTICS (continued)
(VCC= +3.0V to +3.6V, VSTBY= VCC, TA= -40°C to +125°C, unless otherwise noted. Typical values are at VCC= +3.3V and TA=
+25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
High level, channel 1500
Low level, channel 120
High level, channels 2–680100120Remote-Diode Source CurrentIRJ
Low level, channels 2–681012
Undervoltage-Lockout ThresholdUVLOFalling edge of VCC disables ADC2.302.802.95V
Undervoltage-Lockout Hysteresis90mV
Power-On Reset (POR) ThresholdVCC falling edge1.2022.25V
POR Threshold Hysteresis90mV
ALERT, OVERT
ISINK = 1mA0.3Output Low VoltageVOLISINK = 6mA0.5V
Output Leakage Current1µA
SMBus INTERFACE (SMBCLK, SMBDATA), STBY
Logic-Input Low VoltageVIL0.8V
Logic-Input High VoltageVIHVCC = 3.0V2.2V
Input Leakage Current-1+1µA
Output Low VoltageVOLISINK = 6mA0.3V
Input CapacitanceCIN5pF
SMBus-COMPATIBLE TIMING (Figures 3 and 4) (Note 4)
Serial-Clock FrequencyfSMBCLK(Note 5)400kHz
fSMBCLK = 100kHz4.7Bus Free Time Between STOP
and START ConditiontBUFfSMBCLK = 400kHz1.6µs
fSMBCLK = 100kHz4.7START Condition Setup TimefSMBCLK = 400kHz0.6µs
90% of SMBCLK to 90% of SMBDATA,
fSMBCLK = 100kHz0.6
Repeat START Condition Setup
TimetSU:STA
90% of SMBCLK to 90% of SMBDATA,
fSMBCLK = 400kHz0.6
START Condition Hold TimetHD:STA10% of SMBDATA to 90% of SMBCLK0.6µs
90% of SMBCLK to 90% of SMBDATA,
fSMBCLK = 100kHz4
STOP Condition Setup TimetSU:STO90% of SMBCLK to 90% of SMBDATA,
fSMBCLK = 400kHz0.6
MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
Note 2:All parameters are tested at TA= +85°C. Specifications over temperature are guaranteed by design.
Note 3:Beta = 0.5 for channel 1 remote transistor.
Note 4:Timing specifications are guaranteed by design.
Note 5:The serial interface resets when SMBCLK is low for more than tTIMEOUT.
Note 6:A transition must internally provide at least a hold time to bridge the undefined region (300ns max) of SMBCLK’s falling edge.
ELECTRICAL CHARACTERISTICS (continued)
(VCC= +3.0V to +3.6V, VSTBY= VCC, TA= -40°C to +125°C, unless otherwise noted. Typical values are at VCC= +3.3V and TA=
+25°C.) (Note 2)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
10% to 10%, fSMBCLK = 100kHz1.3Clock-Low PeriodtLOW10% to 10%, fSMBCLK = 400kHz1.3µs
Clock-High PeriodtHIGH90% to 90%0.6µs
fSMBCLK = 100kHz300Data Hold TimetHD:DATfSMBCLK = 400kHz (Note 6)900ns
fSMBCLK = 100kHz250Data Setup TimetSU:DATfSMBCLK = 400kHz100ns
fSMBCLK = 100kHz1Receive SMBCLK/SMBDATA
Rise TimetRfSMBCLK = 400kHz0.3µs
Receive SMBCLK/SMBDATA Fall
TimetF300ns
Pulse Width of Spike SuppressedtSP050ns
SMBus TimeouttTIMEOUTSMBDATA low period for interface reset253745ms
MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
Typical Operating Characteristics
(VCC= 3.3V, VSTBY= VCC, TA= +25°C, unless otherwise noted.)
SOFTWARE STANDBY SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6693 toc01
SUPPLY VOLTAGE (V)
STANDBY SUPPLY CURRENT (
SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX6693 toc02
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (
LOW BETA DIODE CONNECTED TO
CHANNEL 1 WITH RESISTANCE
CANCELLATION AND LOW BETA255075100125
LOCAL TEMPERATURE ERROR
vs. DIE TEMPERATURE
MAX6693 toc04
DIE TEMPERATURE (°C)
TEMPERATURE ERROR (
REMOTE-DIODE TEMPERATURE ERROR
vs. REMOTE-DIODE TEMPERATURE
MAX6693 toc03
REMOTE-DIODE TEMPERATURE (°C)
TEMPERATURE ERROR (
CHANNEL 2
CHANNEL 1
REMOTE-DIODE TEMPERATURE ERROR
vs. POWER-SUPPLY NOISE FREQUENCY
MAX6693 toc05
FREQUENCY (MHz)
TEMPERATURE ERROR (
100mVP-P
CHANNEL 2
CHANNEL 1
LOCAL TEMPERATURE ERROR
vs. POWER-SUPPLY NOISE FREQUENCY
MAX6693 toc06
FREQUENCY (MHz)
TEMPERATURE ERROR (
100mVP-P
CH 2 REMOTE-DIODE TEMPERATURE ERROR
vs. COMMON-MODE NOISE FREQUENCY
MAX6693 toc07
FREQUENCY (MHz)
TEMPERATURE ERROR (
100mVP-P
MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
Typical Operating Characteristics (continued)
(VCC= 3.3V, VSTBY= VCC, TA= +25°C, unless otherwise noted.)
CH 2 REMOTE-DIODE TEMPERATURE
ERROR vs. CAPACITANCE
MAX6693 toc09
CAPACITANCE (nF)
TEMPERATURE ERROR (100
Pin Description
PINNAMEFUNCTIONDXP1
Combined Current Source and A/D Positive Input for Channel 1 Remote Transistor. Connect to the
emitter of a low-beta transistor. Leave unconnected or connect to VCC if no remote transistor is used.
Place a 100pF capacitor between DXP1 and DXN1 for noise filtering.DXN1Base Inp ut for C hannel 1 Rem ote D i od e. C onnect to the b ase of a P N P tem p er atur e- sensi ng tr ansi stor .DXP2
Combined Current Source and A/D Positive Input for Channel 2 Remote Diode. Connect to the anode
of a remote-diode-connected temperature-sensing transistor. Leave unconnected or connect to VCC
if no remote diode is used. Place a 100pF capacitor between DXP2 and DXN2 for noise filtering.DXN2Cathode Input for Channel 2 Remote Diode. Connect the cathode of the channel 2 remote-diode-
connected transistor to DXN2.DXP3
Combined Current Source and A/D Positive Input for Channel 3 Remote Diode. Connect to the anode
of a remote-diode-connected temperature-sensing transistor. Leave unconnected or connect to VCC
if no remote diode is used. Place a 100pF capacitor between DXP3 and DXN3 for noise filtering.DXN3Cathode Input for Channel 3 Remote Diode. Connect the cathode of the channel 3 remote-diode-
connected transistor to DXN3.DXP4
Combined Current Source and A/D Positive Input for Channel 4 Remote Diode. Connect to the anode
of a remote-diode-connected temperature-sensing transistor. Leave unconnected or connect to VCC
if no remote diode is used. Place a 100pF capacitor between DXP4 and DXN4 for noise filtering.DXN4Cathode Input for Channel 4 Remote Diode. Connect the cathode of the channel 4 remote-diode-
connected transistor to DXN4.
CH 1 REMOTE-DIODE TEMPERATURE
ERROR vs. CAPACITANCE
MAX6693 toc08
CAPACITANCE (nF)
TEMPERATURE ERROR (
°C)100
MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
Detailed Description
The MAX6693 is a precision multichannel temperature
monitor that features one local and six remote tempera-
ture-sensing channels with a programmable alert
threshold for each temperature channel and a program-
mable overtemperature threshold for channels 1, 4, 5,
and 6 (see Figure 1). Communication with the MAX6693
is achieved through the SMBus serial interface and a
dedicated alert pin. The alarm outputs, OVERTand
ALERT, assert if the software-programmed temperature
thresholds are exceeded. ALERTtypically serves as an
interrupt, while OVERTcan be connected to a fan, sys-
tem shutdown, or other thermal-management circuitry.
ADC Conversion Sequence
In the default conversion mode, the MAX6693 starts the
conversion sequence by measuring the temperature on
channel 1, followed by 2, 3, local channel, 4, 5, and 6.
The conversion result for each active channel is stored
in the corresponding temperature data register.
Low-Power Standby Mode
Enter software standby mode by setting the STOP bit to
1 in the configuration 1 register. Enter hardware standby
by pulling STBYlow.Software standby mode disables
the ADC and reduces the supply current to approxi-
mately 3µA.Hardware standby mode halts the ADC
clock, but the supply current is approximately 350µA.
During either software or hardware standby, data is
retained in memory. During hardware standby, the
SMBus interface is inactive. During software standby, the
SMBus interface is active and listening for commands.
The timeout is enabled if a start condition is recognized
on SMBus. Activity on the SMBus causes the supply cur-
rent to increase. If a standby command is received while
a conversion is in progress, the conversion cycle is inter-
rupted, and the temperature registers are not updated.
The previous data is not changed and remains available.
PINNAMEFUNCTIONDXP5
Combined Current Source and A/D Positive Input for Channel 5 Remote Diode. Connect to the anode
of a remote-diode-connected temperature-sensing transistor. Leave unconnected or connect to VCC
if no remote diode is used. Place a 100pF capacitor between DXP5 and DXN5 for noise filtering.DXN5Cathode Input for Channel 5 Remote Diode. Connect the cathode of the channel 5 remote-diode-
connected transistor to DXN5.DXN6Cathode Input for Channel 6 Remote Diode. Connect the cathode of the channel 6 remote-diode-
connected transistor to DXN6.DXP6
Combined Current Source and A/D Positive Input for Channel 6 Remote Diode. Connect to the anode
of a remote-diode-connected temperature-sensing transistor. Leave unconnected or connect to VCC
if no remote diode is used. Place a 100pF capacitor between DXP6 and DXN6 for noise filtering.STBYActi ve- Low S tand b y Inp ut. D r i ve S TBY l og i c- l ow to p l ace the M AX 6693 i n stand b y m od e, or l og i c- hi g h
for op er ate m od e. Tem p er atur e and thr eshol d d ata ar e r etai ned i n stand b y m od e.N.C.No Connection. Must be connected to ground.OVERTOvertemperature Active-Low, Open-Drain Output. OVERT asserts low when the temperature of
channels 1, 4, 5, and 6 exceeds the programmed threshold limit.VCCSupply Voltage Input. Bypass to GND with a 0.1µF capacitor.ALERTSMBus Alert (Interrupt), Active-Low, Open-Drain Output. ALERT asserts low when the temperature of
any channel exceeds the programmed ALERT threshold.SMBDATASMBus Serial Data Input/Output. Connect to a pullup resistor.SMBCLKSMBus Serial Clock Input. Connect to a pullup resistor.GNDGround
Pin Description (continued)
MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
Operating-Current Calculation
The MAX6693 operates at different operating-current
levels depending on how many external channels are in
use. Assume that ICC1is the operating current when
the MAX6693 is converting the remote channel 1 and
ICC2is the operating current when the MAX6693 is con-
verting the other channels. For the MAX6693 with
remote channel 1 and n other remote channels con-
nected, the operating current is:
ICC= (2 x ICC1+ ICC2+ n x ICC2)/(n + 3)
SMBus Digital Interface
From a software perspective, the MAX6693 appears as
a series of 8-bit registers that contain temperature mea-
surement data, alarm threshold values, and control bits.
A standard SMBus-compatible, 2-wire serial interface is
used to read temperature data and write control bits
and alarm threshold data. The same SMBus slave
address also provides access to all functions.
Figure 1. Internal Block Diagram
DXP1
DXN1
DXP2
DXN2
DXP3
DXN3
DXP4
DXN4
DXP5
DXN5
DXP6
DXN6
INPUT
BUFFER
CURRENT
SOURCES,
BETA
COMPEN-
SATION
AND MUX
VCC
REF
ADC
COMMAND BYTE
REMOTE TEMPERATURES
LOCAL TEMPERATURES
REGISTER BANK
ALERT THRESHOLD
OVERT THRESHOLD
ALERT RESPONSE ADDRESS
ALARM
ALU
SMBus
INTERFACE
MAX6693
SMBCLKSMBDATA
OVERT
ALERT
STBY
MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
The MAX6693 employs four standard SMBus protocols:
write byte, read byte, send byte, and receive byte
(Figure 2). The shorter receive byte protocol allows
quicker transfers, provided that the correct data regis-
ter was previously selected by a read byte instruction.
Use caution with the shorter protocols in multimaster
systems, since a second master could overwrite the
command byte without informing the first master. Figure
3 is the SMBus write-timing diagram and Figure 4 is the
SMBus read-timing diagram.
The remote diode 1 measurement channel provides 11
bits of data (1 LSB = 0.125°C). All other temperature-
measurement channels provide 8 bits of temperature
data (1 LSB = 1°C). The 8 most significant bits (MSBs)
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 extended
resolution register should be read first. This prevents
the most significant bits from being overwritten by new
conversion results until they have been read. If the most
significant bits have not been read within an SMBus
timeout period (nominally 37ms), normal updating con-
tinues. Table 1 shows the main temperature register
(high-byte) data format, and Table 2 shows the extend-
ed resolution register (low-byte) data format.
Figure 2. SMBus Protocols
TEMP (°C)DIGITAL OUTPUT
> +1270111 1111
+1270111 1111
+1260111 1110
+250001 10010000 0000
< 00000 0000
Diode fault (open or short)1111 1111
Table 1. Main Temperature Register
(High-Byte) Data Format
TEMP (°C)DIGITAL OUTPUT000X XXXX
+0.125001X XXXX
+0.250010X XXXX
+0.375011X XXXX
+0.500100X XXXX
+0.625101X XXXX
+0.750110X XXXX
+0.875111X XXXX
Table 2. Extended Resolution Temperature
Register (Low-Byte) Data FormatADDRESSWRACKACKPDATAACKCOMMAND
7 BITS18 BITS8 BITS
SLAVE ADDRESS: EQUIVA-
LENT TO CHIP-SELECT LINE OF
A 3-WIRE INTERFACE
DATA BYTE: DATA GOES INTO THE REGISTER
SET BY THE COMMAND BYTE (TO SET
THRESHOLDS, CONFIGURATION MASKS, AND
SAMPLING RATE)
WRITE BYTE FORMATADDRESSADDRESSWRACKACKPSRDACK///DATACOMMAND
7 BITS7 BITS8 BITS8 BITS
READ BYTE FORMAT
SLAVE ADDRESS: EQUIVA-
LENT TO CHIP SELECT LINE
COMMAND BYTE: SELECTS
WHICH REGISTER YOU ARE
REDING FROMADDRESSWRACKACKCOMMAND
7 BITS8 BITS
SEND BYTE FORMAT
COMMAND BYTE: SENDS COM-
MAND WITH NO DATA, USUALLY
USED FOR ONE-SHOT COMMANDADDRESSRDACK///DATA
7 BITS8 BITS
RECEIVE BYTE FORMAT
DATA BYTE: READS DATA FROM
THE REGISTER COMMANDED
BY THE LAST READ BYTE OR
WRITE BYTE TRANSMISSION;
ALSO USED FOR SMBus ALERT
RESPONSE RETURN ADDRESS
SLAVE ADDRESS: REPEATED
DUE TO CHANGE IN DATA-
FLOW DIRECTION
DATA BYTE: READS FROM
THE REGISTER SET BY THE
COMMAND BYTE
S = START CONDITION.
P = STOP CONDITION.
SHADED = SLAVE TRANSMISSION.
/// = NOT ACKNOWLEDGED.
MAX6693
7-Channel Precision Temperature Monitor
with Beta Compensation
Diode Fault Detection
If a channel’s input DXP_ and DXN_ are left open, the
MAX6693 detects a diode fault. An open diode fault does
not cause either ALERTor OVERTto assert. A bit in the sta-
tus register for the corresponding channel is set to 1 and the
temperature data for the channel is stored as all 1s (FFh). It
takes approximately 4ms for the MAX6693 to detect a diode
fault. Once a diode fault is detected, the MAX6693 goes to
the next channel in the conversion sequence.
Alarm Threshold Registers
There are 11 alarm threshold registers that store over-tem-
perature ALERTand OVERTthreshold values. Seven of
these registers are dedicated to storing one local alert tem-
perature threshold limit and six remote alert temperature
threshold limits (see the ALERTInterrupt Modesection).
The remaining four registers are dedicated to remote chan-
(see theOVERTOvertemperature Alarmssection). Access
to these registers is provided through the SMBusinterface.
ALERTInterrupt Mode
An ALERTinterrupt occurs when the internal or external
temperature reading exceeds a high-temperature limit
(user programmable). The ALERTinterrupt output signal
can be cleared by reading the status register(s) associ-
ated with the fault(s) or by successfully responding to an
alert response address transmission by the master. In
both cases, the alert is cleared but is reasserted at the
end of the next conversion if the fault condition still
exists. The interrupt does not halt automatic conversions.
The ALERToutput is open-drain so that multiple devices
can share a common interrupt line. All ALERTinterrupts
can be masked using the configuration 2 register. The
POR state of these registers is shown in Table 3.
SMBCLKCDEFGHIJK
SMBDATA
tSU:STAtHD:STA
tLOWtHIGH
tSU:DATtHD:DATtSU:STOtBUF
A = START CONDITION.
B = MSB OF ADDRESS CLOCKED INTO SLAVE.
C = LSB OF ADDRESS CLOCKED INTO SLAVE.
D = R/W BIT CLOCKED INTO SLAVE.
E = SLAVE PULLS SMBDATA LINE LOW. M
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER.
G = MSB OF DATA CLOCKED INTO MASTER.
H = LSB OF DATA CLOCKED INTO MASTER.
I = MASTER PULLS DATA LINE LOW.
J = ACKNOWLEDGE CLOCKED INTO SLAVE.
K = ACKNOWLEDGE CLOCK PULSE.
L = STOP CONDITION.
M = NEW START CONDITION.
Figure 3. SMBus Write-Timing Diagram
SMBCLK
A = START CONDITION.
B = MSB OF ADDRESS CLOCKED INTO SLAVE.
C = LSB OF ADDRESS CLOCKED INTO SLAVE.
D = R/W BIT CLOCKED INTO SLAVE.CDEFGHIJ
SMBDATA
tSU:STAtHD:STA
tLOWtHIGH
tSU:DATtSU:STOtBUFK
E = SLAVE PULLS SMBDATA LINE LOW.
F = ACKNOWLEDGE BIT CLOCKED INTO MASTER.
G = MSB OF DATA CLOCKED INTO SLAVE.
H = LSB OF DATA CLOCKED INTO SLAVE.
I = MASTER PULLS DATA LINE LOW.
J = ACKNOWLEDGE CLOCKED INTO SLAVE.
K = ACKNOWLEDGE CLOCK PULSE.
L = STOP CONDITION.
M = NEW START CONDITION.
Figure 4. SMBus Read-Timing Diagram

Partno	Mfg	Dc	Qty	Available	Descript
MAX6693UP9A+ \|MAX6693UP9A	MAX	N/a	12018	avai	7-Channel Precision Temperature Monitor with Beta Compensation
MAX6693UP9A+ \|MAX6693UP9A	MAXIM	N/a	1032	avai	7-Channel Precision Temperature Monitor with Beta Compensation
MAX6693UP9A+T \|MAX6693UP9AT	MAXIM	N/a	1768	avai	7-Channel Precision Temperature Monitor with Beta Compensation