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ADM1033 bảng dữ liệu(PDF) 3 Page - ON Semiconductor

tên linh kiện ADM1033
Giải thích chi tiết về linh kiện  Thermal Monitor and Fan Speed (RPM) Controller
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ADM1033
http://onsemi.com
3
ABSOLUTE MAXIMUM RATINGS
Parameter
Rating
Unit
Positive Supply Voltage (VCC)
−0.3, +6.5
V
Voltage on Any Input or Output Pin except FAN_FAULT and LOCATION
−0.3 to VDD +6.5
V
Voltage on FAN_FAULT (Note 1)
VCC
Voltage on LOCATION
VCC + 0.3
V
Input Current at Any Pin
±20
mA
Maximum Junction Temperature (TJ max)
150
°C
Storage Temperature Range
−65 to +150
°C
Lead Temperature, Soldering (10 s)
300
°C
IR Reflow Peak Temperature
220
°C
ESD Rating − All Pins
1500
V
1. During powerup the voltage on FAN_FAULT should not be higher than VCC.
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.
THERMAL CHARACTERISTICS
Parameter
Rating
16−Lead QSOP Package
qJA = 150°C/W, qJC = 39°C/W
PIN ASSIGNMENT
Pin No.
Mnemonic
Description
1
DRIVE1
DRIVE1 Pin Drives Fan 1. Open−drain output. Requires a pullup resistor.
2
TACH1
Fan 1 Fan Speed Measurement Input. Connects to the fan’s TACH output to measure the fan speed.
3
ALERT Comp
Open−Drain Active Low Output. Assets low whenever a measurement goes outside its programmed
limits if not masked. Automatically goes high again when the measured parameter falls back within
its limits.
4
NC
No Connect.
5
GND
Ground for Analog and Digital Circuitry.
6
VCC
Power. Can be powered by 3.3 V standby power if monitoring in low power states is required.
7
THERM
Can be configured as an overtemperature interrupt output, or as an input (to monitor PROCHOT
output of an INTEL CPU). A timer measures assertion times on the THERM pin (either input or output).
8
FAN_FAULT/REF
FAN_FAULT: Open−Drain Output. Asserted low when one or both fans stall. Requires a pullup
resistor to VCC. REF: Analog Input Reference for the THERM Input.
9
D1−
Cathode Connection for the First Thermal Diode or Diode−Connected Transistor.
10
D1+
Anode Connection for the First Thermal Diode or Diode−Connected Transistor.
11
NC
No Connect.
12
NC
No Connect.
13
LOCATION
8−Level Analog Input. Used to determine the correct SMBus version and the SMBus address (in
fixed and discoverable mode) and to set the LLL bits in the UDID (in ARP−capable mode).
14
ALERT
Open−Drain Output. SMBusALERT pin. Alerts the system in the case of out−of−limit events, such as
over temperature. Can be configured as sticky SMBus mode or comparator mode.
15
SDA
Serial Bus Bidirectional Data. Connects to the SMBus master’s data line. Requires pullup resistor if
not provided elsewhere in the system.
16
SCL
Serial SMBus Clock Input. Connects to the SMBus master’s clock line. Requires pullup resistor if not
already provided in the system.


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