Rainbow-electronics MAX6683 Manuel d'utilisateur

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General Description
The MAX6683 system supervisor monitors multiple
power-supply voltages, including its own, and also fea-
tures an on-board temperature sensor. The MAX6683
converts voltages to an 8-bit code and temperatures to
an 11-bit (10-bit-plus-sign) code using an analog-to-
digital converter (ADC). A multiplexer automatically
sequences through the voltage and temperature mea-
surements. The digitized signals are then stored in reg-
isters and compared to the over/underthreshold limits
programmed over the SMBus™/I
2
C™-compatible 2-
wire serial interface.
When a temperature measurement exceeds the pro-
grammed threshold, or when an input voltage falls out-
side the programmed voltage limits, the MAX6683
generates a latched interrupt output ALERT. Three
interrupt modes are available for temperature excur-
sions. These are default mode, one-time interrupt
mode, and comparator mode. The ALERT output is
cleared, except for temperature interrupts generated in
comparator mode, by reading the Interrupt Status reg-
ister (Table 5). The ALERT output can also be masked
by writing to the appropriate bits in the Interrupt Mask
register (Table 6) or by setting bit 1 of the Configuration
register (Table 4) to zero. The MAX6683 SMBus/I
2
C-
compatible interface also responds to the SMB alert
response address.
Applications
Workstations
Servers
Networking
Telecommunications
Features
Monitors Local Temperature
Monitors Three External Voltages (1.8V, 2.5V, 5V
Nominal)
Monitors V
CC
(3.3V Nominal)
User-Programmable Voltage and Temperature
Thresholds
Alert Function with Ability to Respond to SMB
Alert Response Address
+2.7V to +5.5V Supply Range
-40°C to +125°C Temperature Range
60Hz or 50Hz Line-Frequency Rejection
Tiny 10-Pin µMAX Package
MAX6683EVKIT Available
MAX6683
Temperature Sensor and System Monitor
in a 10-Pin µMAX
________________________________________________________________ Maxim Integrated Products 1
1
2
3
4
5
10
9
8
7
6
V
CC
SCL
SDA
ADDN.C.
5V
IN
2.5V
IN
1.8V
IN
MAX6683
TOP VIEW
GND ALERT
Pin Configuration
19-2226; Rev 0; 10/01
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Ordering Information
PART TEMP. RANGE PIN-PACKAGE
MAX6683AUB -40°C to +125°C 10 µMAX
SMBus is a trademark of Intel Corp.
I
2
C is a trademark of Philips Corp.
I
2
C/SMBus
CONTROLLER
CPU
V
CC
V
CC
=
+3.3V
SCL
SDA
ADD
1.8V
IN
2.5V
IN
5V
IN
N.C.
GND
TO 1.8V
1.8V
TO 2.5V
TO 5V
0.1µF
10k
ALERT
Typical Application Circuit
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Résumé du contenu

Page 1 - TOP VIEW

General DescriptionThe MAX6683 system supervisor monitors multiplepower-supply voltages, including its own, and also fea-tures an on-board temperature

Page 2 - ELECTRICAL CHARACTERISTICS

MAX6683Temperature Sensor and System Monitor in a 10-Pin µMAX10 ______________________________________________________________________________________

Page 3

rupt continues to be generated on subsequent mea-surements until the temperature falls below THOT.SMBus/I2C-Compatible Digital InterfaceFrom a softwar

Page 4 - = +3.3V, ADD = GND, T

MAX6683The MAX6683 also responds to the SMBus alertresponse address (see Alert Response Address).Alert Response AddressThe SMBus alert response interr

Page 5 - Pin Description

upper byte contains the MSBs, while the lower bytecontains the 3LSBs (Figure 5). D9–D3 of the upper byterepresent the whole decimal number of the temp

Page 6 - Table 1. Register Map

MAX6683Temperature Sensor and System Monitor in a 10-Pin µMAXMaxim cannot assume responsibility for use of any circuitry other than circuitry entirely

Page 7 - (Two's Complement)

MAX6683Temperature Sensor and System Monitor in a 10-Pin µMAX2 _______________________________________________________________________________________

Page 8

MAX6683Temperature Sensor and System Monitor in a 10-Pin µMAX_______________________________________________________________________________________ 3

Page 9 - Interrupts

MAX6683Temperature Sensor and System Monitor in a 10-Pin µMAX4 _______________________________________________________________________________________

Page 10 - Figure 2. SMBus Protocols

Detailed DescriptionThe MAX6683 is a voltage and temperature monitordesigned to communicate through an SMBus/I2C inter-face with an external microcont

Page 11 - Slave Address

MAX6683Unless the fault is removed, the ALERT output onlyremains cleared until the end of the next conversioncycle where it is again asserted. The ALE

Page 12 - Read Temperature

ten to the Serial Address Register. This code overwritesthe code set by connection of the ADD pin, until theMAX6683 is taken through a POR cycle.ADC a

Page 13 - Chip Information

MAX6683The POR state of the THOTregister is 0101 0000 or+80°C. The POR state of the THYSTregister is 01000001 or +65°C. High and low limits for the vo

Page 14 - Package Information

ALERTInterruptsAn out-of-range voltage or temperature causes theALERT output signal to be asserted. However, if theassertion is caused by an out-of-ra

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