ADT7475
SCL
SDA SMBALERT
ADT7475
SERIAL BUS
INTERFACE
PWM1
PWM2
PWM3
TACH1
TACH2
TACH3
PWM REGISTERS
AND
CONTROLLERS
(HF & LF)
ACOUSTIC
ENHANCEMENT
CONTROL
FAN SPEED
COUNTER
AUTOMATIC
FAN SPEED
CONTROL
ADDRESS
POINTER
REGISTER
PWM
CONFIGURATION
REGISTERS
TACH4
PERFORMANCE
MONITORING
INTERRUPT
MASKING
THERM
V CC
V CC to ADT7475
THERMAL
PROTECTION
INTERRUPT
STATUS
REGISTERS
D1+
D1 ?
D2+
INPUT
SIGNAL
CONDITIONING
10-BIT
ADC
LIMIT
COMPARATORS
D2 ?
V CCP
BAND GAP
TEMP. SENSOR
AND
ANALOG
MULTIPLEXER
BAND GAP
REFERENCE
VALUE AND
LIMIT
REGISTERS
GND
Figure 1. Functional Block Diagram
Table 1. ABSOLUTE MAXIMUM RATINGS
Parameter
Positive Supply Voltage (V CC )
Voltage on Any Input or Output Pin
Input Current at Any Pin
Package Input Current
Maximum Junction Temperature (T J MAX )
Storage Temperature Range
Lead Temperature, Soldering
IR Reflow Peak Temperature
Lead Temperature (Soldering, 10 sec)
ESD Rating
Rating
3.6
? 0.3 to +3.6
± 5
± 20
150
? 65 to +150
260
300
1,500
Unit
V
V
mA
mA
° C
° C
° C
V
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
NOTE: This device is ESD sensitive. Use standard ESD precautions when handling.
Table 2. THERMAL CHARACTERISTICS
16-lead QSOP (Note 1)
Package Type
q JA
150
q JC
39
Unit
° C/W
1. q JA is specified for the worst-case conditions, that is, a device soldered in a circuit board for surface-mount packages.
http://onsemi.com
2
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