ADT7476
ADDR
ADDREN
SELECT
SCL
SDA
SMBALERT
VID5/GPIO5
VID4/GPIO4
ADT7476
VID3/GPIO3
VID2/GPIO2
VID1/GPIO1
VID0/GPIO0
GPIO6
VID/GPIO
REGISTER
SMBus
ADDRESS
SELECTION
SERIAL BUS
INTERFACE
ADDRESS
POINTER
PWM1
PWM2
PWM3
TACH1
TACH2
TACH3
TACH4
PWM REGISTERS
AND CONTROLLERS
(HF AND LF)
AUTOMATIC
FAN SPEED
CONTROL
FAN SPEED
COUNTER
REGISTER
PWM
CONFIGURATION
REGISTERS
INTERRUPT
MASKING
PERFORMANCE
MONITORING
THERM
V CC
D1+
D1 ?
D2+
D2 ?
+5V IN
+12V IN
+2.5V IN
V CCP
V CC TO ADT7476
BAND GAP
THERMAL
PROTECTION
INPUT
SIGNAL
CONDITIONING
AND
ANALOG
MULTIPLEXER
ACOUSTIC
ENHANCEMENT
CONTROL
10-BIT
ADC
BAND GAP
REFERENCE
INTERRUPT
STATUS
REGISTERS
LIMIT
COMPARATORS
VALUE AND
LIMIT
REGISTERS
TEMP. SENSOR
GND
Figure 1. Functional Block Diagram
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter
Positive Supply Voltage (V CC )
Maximum Voltage on +12 V IN Pin
Maximum Voltage on +5.0 V IN Pin
Maximum Voltage on All Open-Drain Outputs
Input Current at Any Pin
Package Input Current
Maximum Junction Temperature (T J MAX )
Storage Temperature Range
Lead Temperature, Soldering
IR Reflow Peak Temperature
Pb-Free Peak Temperature
Lead Temperature (Soldering, 10 sec)
ESD Rating
Rating
3.6
16
6.25
3.6
± 5
± 20
150
? 65 to +150
220
260
300
1,500
Unit
V
V
V
V
mA
mA
° C
° C
° C
V
Stresses exceeding those listed in the Maximum Ratings table may damage the device. If any of these limits are exceeded, device functionality
should not be assumed, damage may occur and reliability may be affected.
NOTE: This device is ESD sensitive. Use standard ESD precautions when handling.
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2
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