MAX6683 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – Temperature Sensor and System Monitor in a 10-Pin μMAX

19-2226; Rev 1; 7/04
EVAALVUAAILTAIOBNLEKIT
Temperature Sensor and
System Monitor in a 10-Pin µMAX
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™/I²C™-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/I²C-
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
PART
MAX6683AUB
Ordering Information
TEMP RANGE
-40°C to +125°C
PIN-PACKAGE
10 µMAX
Typical Application Circuit
1.8V
CPU
0.1μF
V_CC = +3.3V
TO 1.8V
TO 2.5V
TO 5V
1.8V_IN
2.5V_IN
5V_IN
N.C.
GND
V_CC
SCL
SDA
ADD
ALERT
10kΩ
I²C/SMBus
CONTROLLER
TOP VIEW
Pin Configuration
1.8V_IN 1
2.5V_IN 2
5V_IN 3
N.C. 4
GND 5
MAX6683
10 V_CC
9 SCL
8 SDA
7 ADD
6 ALERT
SMBus is a trademark of Intel Corp.
I²C is a trademark of Philips Corp.
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