19-2226; Rev 1; 7/04
KIT
ATION
EVALU
E
BL
AVAILA
Temperature Sensor and
System Monitor in a 10-Pin µMAX
General Description
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
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.
Ordering Information
PART
MAX6683AUB
TEMP RANGE
-40°C to +125°C
PIN-PACKAGE
10 µMAX
Applications
Workstations
Servers
Networking
Telecommunications
Typical Application Circuit
1.8V
V
CC
= +3.3V
CPU
0.1μF
Pin Configuration
TOP VIEW
1.8V
IN
1
2.5V
IN
2
3
4
5
10
V
CC
9
SCL
SDA
ADD
ALERT
10kΩ
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
I
2
C/SMBus
CONTROLLER
5V
IN
N.C.
GND
MAX6683
8
7
6
SMBus is a trademark of Intel Corp.
I
2
C is a trademark of Philips Corp.
________________________________________________________________
Maxim Integrated Products
1
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.